Topic: Happy New Years! Seventh alt coin thread! - page 100. (Read 34166 times)
the onda d8p does have a msata slot. but it does have two regular sata ports so youre good with your choice. i like the msata because its 2 less cables and one less thing to mount.
What are the advantages of using a PDU for 4 rigs over 2 double wall outlets? Is it all about power quality?
My electrician is booked in to install two double wall outlets wired to two 20A breakers with 20A cable inbetween. Each socket is rated at 10A.
We use 240V in Australia, so 4800W per breaker, 80% is 3840W. That's 1920W per socket.
Why should I consider investing in a PDU? (or two)
My electrician is booked in to install two double wall outlets wired to two 20A breakers with 20A cable inbetween. Each socket is rated at 10A.
We use 240V in Australia, so 4800W per breaker, 80% is 3840W. That's 1920W per socket.
Why should I consider investing in a PDU? (or two)
PDUs are useful when you CAN'T change your wiring and outlets (most apartment situations), and in some cases might be a lower-cost option to calling in an electrician to rewire your place when that IS an option.
The AX1200i is a bit of a pain in the ass with regards to cabling. It comes with two double headers and four single headers. While this is 8 PCIE total, it uses up six of that PSU's 8-pin sockets, when it could be 4. Not a problem for a 1080ti rig, but a real pain for 1070/ti rigs.
PS: EVGA SC BLACK is my favorite 1080ti - low heat, high hash, low power and a very small footprint.
PS: EVGA SC BLACK is my favorite 1080ti - low heat, high hash, low power and a very small footprint.
Thanks, I see EVGA SC at 800 euros and FTW3 900 euros. Is it worth adding 100 euro for the 3 fan model?
Nope.
Unless you are going to push the card for max hashrate, in the 200+ TDP range, you won't see any significant difference other than the SC might run a degree or 2 warmer.
I just may have bought the cheapest ever good quality 80 PLUS Platinum power efficiency, 1200W power supply. 
I searched both Ebay and Aliexpress, and then collected this set of supplies to have a server power supply kit for my 4x GTX 1080 Ti GPU rig.
HP - 660185-001 - HP 1200W Platinum Plus Hot Plug Power Supply - Price: $75 USD
Ebay: https://www.ebay.com/itm/HP-660185-001-HP-1200W-Platinum-Plus-Hot-Plug-Power-Supply-Kit/142428912922
partsurfer.hpe.com: http://partsurfer.hpe.com/ShowPhoto.aspx?partnumber=660185-001
DPS-1200FB A 1200/750w Breakout Board - (The 'digital' model with 12x power headers and 12x cables) - Price: $33 USD
Ebay: https://www.ebay.com/itm/DPS-1200FB-A-1200-750w-Breakout-Board-for-HP-PSU-GPU-Mining-ZCASH-ETH-with-Cable/302573412837
6-pin PCI-E power connector to 8-pin ATX12V Motherboard connector adapter. - Price: $0.61 USD
Aliexpress: https://www.aliexpress.com/item/6-pin-to-8-pin-PCI-Express-Power-Converter-Cable-for-GPU-Video-Card-PCIE-PCI/32819022664.html
6pin Input DC-ATX-250W 24pin Power Supply Module - Price: $14.60 USD
Aliexpress: https://www.aliexpress.com/item/NEW-DC-12V-250W-ATX-24pin-Power-Supply-Module-Swithc-Pico-PSU-Car-Auto-Mini-ITX/32828439849.html
(For risers only) - 2x 16AWG PCIe PCI Express 6pin female to Dual 6pin male - Price: $13.42 USD
Ebay: https://www.ebay.com/itm/16AWG-PCIe-PCI-Express-6pin-female-to-Dual-6pin-male-Y-Splitter-Power-Cable/222447737375
Total price for the psu kit: $136.63 USD
Prices are including the shipping to Finland.
This was a nice find, since I really like those HP Common Slot server power supplies.
I searched both Ebay and Aliexpress, and then collected this set of supplies to have a server power supply kit for my 4x GTX 1080 Ti GPU rig.
HP - 660185-001 - HP 1200W Platinum Plus Hot Plug Power Supply - Price: $75 USD
Ebay: https://www.ebay.com/itm/HP-660185-001-HP-1200W-Platinum-Plus-Hot-Plug-Power-Supply-Kit/142428912922
partsurfer.hpe.com: http://partsurfer.hpe.com/ShowPhoto.aspx?partnumber=660185-001
DPS-1200FB A 1200/750w Breakout Board - (The 'digital' model with 12x power headers and 12x cables) - Price: $33 USD
Ebay: https://www.ebay.com/itm/DPS-1200FB-A-1200-750w-Breakout-Board-for-HP-PSU-GPU-Mining-ZCASH-ETH-with-Cable/302573412837
6-pin PCI-E power connector to 8-pin ATX12V Motherboard connector adapter. - Price: $0.61 USD
Aliexpress: https://www.aliexpress.com/item/6-pin-to-8-pin-PCI-Express-Power-Converter-Cable-for-GPU-Video-Card-PCIE-PCI/32819022664.html
6pin Input DC-ATX-250W 24pin Power Supply Module - Price: $14.60 USD
Aliexpress: https://www.aliexpress.com/item/NEW-DC-12V-250W-ATX-24pin-Power-Supply-Module-Swithc-Pico-PSU-Car-Auto-Mini-ITX/32828439849.html
(For risers only) - 2x 16AWG PCIe PCI Express 6pin female to Dual 6pin male - Price: $13.42 USD
Ebay: https://www.ebay.com/itm/16AWG-PCIe-PCI-Express-6pin-female-to-Dual-6pin-male-Y-Splitter-Power-Cable/222447737375
Total price for the psu kit: $136.63 USD
Prices are including the shipping to Finland.
This was a nice find, since I really like those HP Common Slot server power supplies.
All my Colorful mobos have Colorful markings with serial number
is this the one with K17 (without CPU) and K35 variant (with CPU) ?
Colorful is totally different from K17
Colorful have 8x 6 pin at the GPU side , 3 fan headers , single ram slot , 8 pin CPU in with special out cable from board , Sata power out on board with special cable.
K17 have 6x 6 pin at the CPU from , 6 fan headers , no CPU in , or out or sata out .
Also colorful board have larger GPU spacing
My K17 died and killed 8 RX570 GPUs + Msata HD after running 8 GPUs for few minuets , on the other hand the Colorful been running for like two weeks now .
My colorful doenst have any colorful markings and no serial number .
The AX1200i is a bit of a pain in the ass with regards to cabling. It comes with two double headers and four single headers. While this is 8 PCIE total, it uses up six of that PSU's 8-pin sockets, when it could be 4. Not a problem for a 1080ti rig, but a real pain for 1070/ti rigs.
PS: EVGA SC BLACK is my favorite 1080ti - low heat, high hash, low power and a very small footprint.
PS: EVGA SC BLACK is my favorite 1080ti - low heat, high hash, low power and a very small footprint.
Thanks, I see EVGA SC at 800 euros and FTW3 900 euros. Is it worth adding 100 euro for the 3 fan model?
Will the Corsair AX1200i have all the cables for 4x1080TIs? Will I need some extension cables for power?
Have I missed anything?
Have I missed anything?
The AX1200i is a bit of a pain in the ass with regards to cabling. It comes with two double headers and four single headers. While this is 8 PCIE total, it uses up six of that PSU's 8-pin sockets, when it could be 4. Not a problem for a 1080ti rig, but a real pain for 1070/ti rigs.
PS: EVGA SC BLACK is my favorite 1080ti - low heat, high hash, low power and a very small footprint.
Thanks guys for the replies to my ONDA B250 question. Today I already received tracking number and expected delivery for the motherboards is on Monday. These are moving fast.
I am building my first (mining) rig and have more questions. I am posting them here because I am trying to follow Philip's suggestions from page 1.
Actually it's my Amazon "shopping cart" and would like to ask you if everything looks fine and I didn't miss anything:
1) I will initially order 4 1080TI, atm nothing in stock. I've read that I should take the 3 fan version for better cooling. The cards will be max 5cm wide.
2) using ONDA B250 from Sidonia. I will use the PCIEx slots only.
3) 1xRAM for 2 boards https://www.amazon.de/Gskill-F4-2400C16D-16GRS-Memory-2400-Ripjaws/dp/B017UC3VOM
4) 1xCPU https://www.amazon.de/Intel-i5-7400T-Prozessoren-lga1151-64-Bit/dp/B01MZ9GJ1N
5) 1xSSD https://www.amazon.de/Samsung-MZ-7PC128D-EU-interne-6-0Gbps/dp/B005OK6VTA/
6) 1xPSU https://www.amazon.de/Corsair-CP-9020008-EU-Platinum-1200Watt-Netzteil/dp/B008O0ZKMQ
Will the Corsair AX1200i have all the cables for 4x1080TIs? Will I need some extension cables for power?
Have I missed anything?
I am building my first (mining) rig and have more questions. I am posting them here because I am trying to follow Philip's suggestions from page 1.
Actually it's my Amazon "shopping cart" and would like to ask you if everything looks fine and I didn't miss anything:
1) I will initially order 4 1080TI, atm nothing in stock. I've read that I should take the 3 fan version for better cooling. The cards will be max 5cm wide.
2) using ONDA B250 from Sidonia. I will use the PCIEx slots only.
3) 1xRAM for 2 boards https://www.amazon.de/Gskill-F4-2400C16D-16GRS-Memory-2400-Ripjaws/dp/B017UC3VOM
4) 1xCPU https://www.amazon.de/Intel-i5-7400T-Prozessoren-lga1151-64-Bit/dp/B01MZ9GJ1N
5) 1xSSD https://www.amazon.de/Samsung-MZ-7PC128D-EU-interne-6-0Gbps/dp/B005OK6VTA/
6) 1xPSU https://www.amazon.de/Corsair-CP-9020008-EU-Platinum-1200Watt-Netzteil/dp/B008O0ZKMQ
Will the Corsair AX1200i have all the cables for 4x1080TIs? Will I need some extension cables for power?
Have I missed anything?
What are the advantages of using a PDU for 4 rigs over 2 double wall outlets? Is it all about power quality?
My electrician is booked in to install two double wall outlets wired to two 20A breakers with 20A cable inbetween. Each socket is rated at 10A.
We use 240V in Australia, so 4800W per breaker, 80% is 3840W. That's 1920W per socket.
Why should I consider investing in a PDU? (or two)
My electrician is booked in to install two double wall outlets wired to two 20A breakers with 20A cable inbetween. Each socket is rated at 10A.
We use 240V in Australia, so 4800W per breaker, 80% is 3840W. That's 1920W per socket.
Why should I consider investing in a PDU? (or two)
Looking to power (4) rigs in my basement. Each one pulls about 1100 watts. Already have ATX power supplies that will take 240v or 120v. Was trying to figure out how to get enough 15 or 20 amp 120v circuits. But, I think going 240v is the answer.
I read through this writeup - thanks philipma1957
https://bitcointalksearch.org/topic/m.22020934
I would buy / install:
30a 240v circuit with L6-30R plug
PDU rated for 30 amps
appropriate power cords
I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers.
Is this a good plan?
Anyone know where I can find a decent PDU in stock? I read through this writeup - thanks philipma1957
https://bitcointalksearch.org/topic/m.22020934
I would buy / install:
30a 240v circuit with L6-30R plug
PDU rated for 30 amps
appropriate power cords
I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers.
Is this a good plan?
As I looked around tonight these things seem almost as hard to source as GPUs.
Doesn't have to be new or fancy, although having one with a meter might be helpful.
30amp derate to 24 amp
https://www.ebay.com/p/HP-E-04500-Series-PDU-Control-Unit-228481-001/1128925207?
extension bars
https://www.ebay.com/itm/LOT-OF-2-252638-001-HP-100-240V-12A-8-Outlet-Modular-PDU-Extension-Bar/282281082272?
monoprice cables
https://www.monoprice.com/product?p_id=24192
buy 6
cost 49 + 23 + 24 under 100
up to 6 rigs at 825 watts each
6 x 825 = 4950 watts
I only have 4 rigs, not 6. So can I skip the extension bars and plug each rig's power supply into one of the 4 ports on the PDU?
Edit: wait a minute. I'm thinking 240v, the first eBay link the pic of the devices says 120v. I need 4 x 1100 watts or 4400 watts. Was thinking 30a at 240v for 7700 watts derated by 80% to 5760 watts.
you are correct I saw the 24amp which is 80% derate of 30 amp and I missed the 120 volts
give me 5 minutes for proper link
these are 30 amp derate to 24 amp
240 volts I think
https://www.ebay.com/itm/HP-228481-002-Series-EO4501-Modular-PDU-Control-Unit-NEW-/253318888556?hash=item3afafb7c6c
https://www.ebay.com/itm/HP-EO4501-Modular-Power-Distribution-Modular-PDU-Control-Unit-P-N-228481-002/142651094264?hash=item2136aaf4f8:g:Yb4AAOSwwhlaVUN2
Looking to power (4) rigs in my basement. Each one pulls about 1100 watts. Already have ATX power supplies that will take 240v or 120v. Was trying to figure out how to get enough 15 or 20 amp 120v circuits. But, I think going 240v is the answer.
I read through this writeup - thanks philipma1957
https://bitcointalksearch.org/topic/m.22020934
I would buy / install:
30a 240v circuit with L6-30R plug
PDU rated for 30 amps
appropriate power cords
I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers.
Is this a good plan?
Anyone know where I can find a decent PDU in stock? I read through this writeup - thanks philipma1957
https://bitcointalksearch.org/topic/m.22020934
I would buy / install:
30a 240v circuit with L6-30R plug
PDU rated for 30 amps
appropriate power cords
I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers.
Is this a good plan?
As I looked around tonight these things seem almost as hard to source as GPUs.
Doesn't have to be new or fancy, although having one with a meter might be helpful.
30amp derate to 24 amp
https://www.ebay.com/p/HP-E-04500-Series-PDU-Control-Unit-228481-001/1128925207?
extension bars
https://www.ebay.com/itm/LOT-OF-2-252638-001-HP-100-240V-12A-8-Outlet-Modular-PDU-Extension-Bar/282281082272?
monoprice cables
https://www.monoprice.com/product?p_id=24192
buy 6
cost 49 + 23 + 24 under 100
up to 6 rigs at 825 watts each
6 x 825 = 4950 watts
I only have 4 rigs, not 6. So can I skip the extension bars and plug each rig's power supply into one of the 4 ports on the PDU?
Edit: wait a minute. I'm thinking 240v, the first eBay link the pic of the devices says 120v. I need 4 x 1100 watts or 4400 watts. Was thinking 30a at 240v for 7700 watts derated by 80% to 5760 watts.
Just got an update from DHL: the 2 Onda D1800 that I ordered before Christmas - and splurged an extra $17 for "premium fast" shipping - are finally on their way...
In other news, I've resigned myself to populating one of the D1800 with GTX 1060 3GB* as that is all I can find in stock without exorbitant price gouging. I just refuse to pay $700+ for a GTX 1070 Ti.
* - for equihash or neoscrypt, so don't care about the impending 3GB DAG limit breach for Ethereum.
In other news, I've resigned myself to populating one of the D1800 with GTX 1060 3GB* as that is all I can find in stock without exorbitant price gouging. I just refuse to pay $700+ for a GTX 1070 Ti.
* - for equihash or neoscrypt, so don't care about the impending 3GB DAG limit breach for Ethereum.
I got the v1 D8P board.
In the other thread people were saying you guys are having RAM issues with these they don't like just your standard modules? I never ordered the brand everyone was suggesting, so guess if that's the case these won't get set up any time soon.
In the other thread people were saying you guys are having RAM issues with these they don't like just your standard modules? I never ordered the brand everyone was suggesting, so guess if that's the case these won't get set up any time soon.
worse comes to worse here the the exact ram i use on my d8p v1. and damn the did that price go up. i paid $74
https://www.newegg.com/Product/Product.aspx?Item=N82E16820232153
G.SKILL Ripjaws Series 8GB 260-Pin DDR4 SO-DIMM DDR4 2400 (PC4 19200) Laptop Memory Model F4-2400C16S-8GRS
Hi I need some help with Onda D1800 BTC, the mobo arrived without bios battery, what kind of battery I have to use, Lithium CR2032 is the correct one? Is available the scheme to connect power button and status led to FP1 connector?
onda b250 d8p v1 front panel color codes - probably the same on the d1800. not sure about the battery thing though
Green - Power LED
Red - HD LED
Blue - Reset Switch
Black - Power Switch
Looking to power (4) rigs in my basement. Each one pulls about 1100 watts. Already have ATX power supplies that will take 240v or 120v. Was trying to figure out how to get enough 15 or 20 amp 120v circuits. But, I think going 240v is the answer.
I read through this writeup - thanks philipma1957
https://bitcointalksearch.org/topic/m.22020934
I would buy / install:
30a 240v circuit with L6-30R plug
PDU rated for 30 amps
appropriate power cords
I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers.
Is this a good plan?
Anyone know where I can find a decent PDU in stock? I read through this writeup - thanks philipma1957
https://bitcointalksearch.org/topic/m.22020934
I would buy / install:
30a 240v circuit with L6-30R plug
PDU rated for 30 amps
appropriate power cords
I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers.
Is this a good plan?
As I looked around tonight these things seem almost as hard to source as GPUs.
Doesn't have to be new or fancy, although having one with a meter might be helpful.
30amp derate to 24 amp
https://www.ebay.com/p/HP-E-04500-Series-PDU-Control-Unit-228481-001/1128925207?
extension bars
https://www.ebay.com/itm/LOT-OF-2-252638-001-HP-100-240V-12A-8-Outlet-Modular-PDU-Extension-Bar/282281082272?
monoprice cables
https://www.monoprice.com/product?p_id=24192
buy 6
cost 49 + 23 + 24 under 100
up to 6 rigs at 825 watts each
6 x 825 = 4950 watts
Looking to power (4) rigs in my basement. Each one pulls about 1100 watts. Already have ATX power supplies that will take 240v or 120v. Was trying to figure out how to get enough 15 or 20 amp 120v circuits. But, I think going 240v is the answer.
I read through this writeup - thanks philipma1957
https://bitcointalksearch.org/topic/m.22020934
I would buy / install:
30a 240v circuit with L6-30R plug
PDU rated for 30 amps
appropriate power cords
I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers.
Is this a good plan?
Anyone know where I can find a decent PDU in stock? I read through this writeup - thanks philipma1957
https://bitcointalksearch.org/topic/m.22020934
I would buy / install:
30a 240v circuit with L6-30R plug
PDU rated for 30 amps
appropriate power cords
I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers.
Is this a good plan?
As I looked around tonight these things seem almost as hard to source as GPUs.
Doesn't have to be new or fancy, although having one with a meter might be helpful.
So you only put it on outside? Is there direct contact to the internal heat source?
Picture of the mod? Know you on which other server psu it's also possible?
The server PSUs that I like are the HP 1,500w common slot PSU (yellow label on top, takes 220v) and the DPS-2000BB (220v). I use them with breakout boards, not wires. You can strap or screw in a heatsink on the HP 1500w units and that will help keep them cool and the fan noise to a minimum. Easy to fit one of these into a 4U Rosewill case (HP PSU). Can't speak to the particular one on Ebay.
...
Depends. In an open rig, simply passive. Take out six screws, remove the top, apply thermal paste, clamp the heat sink to the top, drill, screw in four screws. In a 4U, I place the HP along the floor of where a normal ATX power supply would fit and I mount a fan on the outside back of the case to blow cool air over the fins. You can also zip tie to keep the heat sink in contact with the top of the HP.
I use these heat sinks:
https://www.ebay.com/itm/Large-Big-Aluminum-Heat-sink-Cooling-Radiator-for-Led-High-Power-Amplifier-IC-B1/292311600903?epid=8008981252&hash=item440f210f07:g:1BQAAOSw~HBZ9vdg
Here you go: https://imgur.com/ZGJdcxt
The HP 1200 looks to be the same dimensions.
The server PSUs that I like are the HP 1,500w common slot PSU (yellow label on top, takes 220v) and the DPS-2000BB (220v). I use them with breakout boards, not wires. You can strap or screw in a heatsink on the HP 1500w units and that will help keep them cool and the fan noise to a minimum. Easy to fit one of these into a 4U Rosewill case (HP PSU). Can't speak to the particular one on Ebay.
...
Depends. In an open rig, simply passive. Take out six screws, remove the top, apply thermal paste, clamp the heat sink to the top, drill, screw in four screws. In a 4U, I place the HP along the floor of where a normal ATX power supply would fit and I mount a fan on the outside back of the case to blow cool air over the fins. You can also zip tie to keep the heat sink in contact with the top of the HP.
I use these heat sinks:
https://www.ebay.com/itm/Large-Big-Aluminum-Heat-sink-Cooling-Radiator-for-Led-High-Power-Amplifier-IC-B1/292311600903?epid=8008981252&hash=item440f210f07:g:1BQAAOSw~HBZ9vdg
Here you go: https://imgur.com/ZGJdcxt
The HP 1200 looks to be the same dimensions.
The knockoff colorful mobo burnt today.
Never felt it was well made. It was like a panda miner board just 12volt pcie in and pass through to the eight gpus.
Only was pulling 845 watts. Using a server psu.
I ran all cards off the pass through on purpose,
So do not run 800 plus watt that way.
I just found it I will show the board in the morning..
Smells burnt.
Eight 1070s set to 105 watts. Ran two months.
Never felt it was well made. It was like a panda miner board just 12volt pcie in and pass through to the eight gpus.
Only was pulling 845 watts. Using a server psu.
I ran all cards off the pass through on purpose,
So do not run 800 plus watt that way.
I just found it I will show the board in the morning..
Smells burnt.
Eight 1070s set to 105 watts. Ran two months.
Which ones are these Phil?
I have Colorful mobos in production so far so good - how to see if its a knock off.
does not have colorful on it has k17 IIRC
I will photo in a few hours I did not like this seller on Alibaba and did not like the board
the review I did on it mentioned I would not order more/
All my Colorful mobos have Colorful markings with serial number
is this the one with K17 (without CPU) and K35 variant (with CPU) ?
My impression on my D8p is that is really well designed/made.... nice thick traces, good etching, layers, attention to detail, etc. I think the D8P is a winner for 8+ slot large format cards.
I was impressed when I opened it up, I honestly was expecting cheap chinese quality.
What ram ya using Jared
none yet; I was planning on ordering some low voltage ddr4... I have a buddy whom was in the memory business here locally once upon a time, and im just going to source a 16gb stick from him when I finally get my board powered up since I may use this machine for more than just a miner.....
A few very recent car projects have put speed bumps into getting this conversion done to the D8P. I bought mine out of impulse; out of all the photos, and different things I was seeing coming out; it showed the most practical purpose in all aspects. #1 being the card spacing. You can stack large format cards and still get enough airflow between them to make cooling them much easier/quieter.
I also got my hands on a chiller: https://www.amazon.com/EcoPlus-Chiller-1-10-HP/dp/B000W4S45C/ref=sr_1_20?ie=UTF8&qid=1515569216&sr=8-20&keywords=tank+chiller
Primarily for my chemistry hobby, but i wonder how efficient it would be for cooling a gpu loop..... Probably not practical though.
It's quite a bit more powerful than yours though. 0.1hp is only 75W so it won't be able to keep up with the heat produced by a single GPU...
I've got the 800W version and hooked it up to my CPU+GPU loop. When ambient temps are low (say sub 18C) I can cool down water to 4C for a short amount of time. Quite fun. I've got the highest TimeSpy score on hwbot for chilled 5960x+GTX1080 setups!
Obviously not efficient at all for a mining rig.
The knockoff colorful mobo burnt today.
Never felt it was well made. It was like a panda miner board just 12volt pcie in and pass through to the eight gpus.
Only was pulling 845 watts. Using a server psu.
I ran all cards off the pass through on purpose,
So do not run 800 plus watt that way.
I just found it I will show the board in the morning..
Smells burnt.
Eight 1070s set to 105 watts. Ran two months.
Never felt it was well made. It was like a panda miner board just 12volt pcie in and pass through to the eight gpus.
Only was pulling 845 watts. Using a server psu.
I ran all cards off the pass through on purpose,
So do not run 800 plus watt that way.
I just found it I will show the board in the morning..
Smells burnt.
Eight 1070s set to 105 watts. Ran two months.
Which ones are these Phil?
I have Colorful mobos in production so far so good - how to see if its a knock off.
does not have colorful on it has k17 IIRC
I will photo in a few hours I did not like this seller on Alibaba and did not like the board
the review I did on it mentioned I would not order more/
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