HELP TO CONNECT 6 GRAPHIC CARDS | Bitcointalksearch.org

carlo_0000

legendary

Activity: 1281

Merit: 1003

just to say the ASRock B85 Anniversary, is not good for 6 gpu's, 5 is ok but not six

the computer is not stable i always have trouble with it, got crash at lease 1 time a week (not overclocking probleme)
computer freeze or half freeze , you can acces some stuff but got error's or program won't load and some are freeze)

specially not compatible with 6 x r9 380
not able to get in windows after you install the last driver, if you do, you get hard disk error's and windows service what crashed
i tried win7 the worst one never got in windows after 6 graphics drivers loaded, and win 10

it s actually the last pci-e connector ho makes the troubles (is it share with the sata's connector?)

i switched the gpu's with my other ring, 2x r9380 + 4x r9 270, it s working under win 10 but it s not stable
sometime after crash i m not able to boot again, i have to restart the computer with the last one unpluged, and reboot again with the last one pluged Huh

chivaki

full member

Activity: 132

Merit: 100

Quote from: ChemicalBoy on April 02, 2015, 06:49:29 PM

Oh then I should buy and try with the mobo BTC-PRO and buy USB Power Riser, Wink

What about the Dummy Plug ? No one say something.

Oh thx for your answer you help much ! Maybe its just about the mobo. Thx all

That can be mobo fault.

Bemerand

hero member

Activity: 532

Merit: 500

Quote from: Siskaver on April 25, 2016, 01:19:10 AM

Quote from: Amph on April 25, 2016, 01:03:24 AM

Quote from: carlo_0000 on April 24, 2016, 05:52:52 PM

what is the point to under clock ? you get less speed

i overclock it but not at max, don't wanna kill my gpus
running 6 x 380's at1080 on 1200w
and 5x 380's on 1000w

the real point for it is tomaintain the hot level at minum, you have fresh and more cooled card with it, it's good to underclock in the summer, in the winter you can avoid it

but this only cut it if the ratio is the same between consumption and earning, not always the case

For the AMD R9 390, we can use the 1250 MHz instead of the 1500 MHz. The hashing speed is not affected.

If you do not overclock to over 1120 MHz in the core, the memory speed can be 1200 MHz, using 98% of memory controller.

umop-apisdn

newbie

Activity: 39

Merit: 0

Good info in here, thanks for the tips.

Siskaver

newbie

Activity: 57

Merit: 0

Quote from: Amph on April 25, 2016, 01:03:24 AM

Quote from: carlo_0000 on April 24, 2016, 05:52:52 PM

what is the point to under clock ? you get less speed

i overclock it but not at max, don't wanna kill my gpus
running 6 x 380's at1080 on 1200w
and 5x 380's on 1000w

the real point for it is tomaintain the hot level at minum, you have fresh and more cooled card with it, it's good to underclock in the summer, in the winter you can avoid it

but this only cut it if the ratio is the same between consumption and earning, not always the case

For the AMD R9 390, we can use the 1250 MHz instead of the 1500 MHz. The hashing speed is not affected.

Amph

legendary

Activity: 3248

Merit: 1070

Quote from: carlo_0000 on April 24, 2016, 05:52:52 PM

what is the point to under clock ? you get less speed

i overclock it but not at max, don't wanna kill my gpus
running 6 x 380's at1080 on 1200w
and 5x 380's on 1000w

the real point for it is to maintain the hot level at minimum, you have fresh and more cooled card with it, it's good to underclock in the summer, in the winter you can avoid it

but this only cut it if the ratio is the same between consumption and earning, not always the case

kanoptx

sr. member

Activity: 406

Merit: 250

www.cryptocompare.com

Quote from: tbearhere on April 23, 2016, 05:10:38 PM

Quote from: Bemerand on April 23, 2016, 03:49:30 PM

Quote from: notlist3d on April 02, 2015, 03:25:44 PM

Quote from: zombie007 on April 02, 2015, 01:16:11 PM

Quote from: ChemicalBoy on April 02, 2015, 12:52:27 PM

When I said rise cable with molex connector I means power riser. So yes I got it. I Check for in Google to find problem with the motherboard but difficult to find who have the problem. So maybe I need to change motherboard but the motherboard have 5 port x 1 and 1 at 16x. Normaly it have to work no ?

Depends on the behavior of the pci-e ports. It really suxx to find the correct mobo for 6 cards, especially with windows. No problem with linux most of the time.
BTC-pro mobo is pretty okay, and cheap too.

BTC-pro mobo still needed powered risers when I used one long ago to get all GPU's working. Maybe my insensitivity was to high. But 2 molex just did not do it.

There are some great powered usb risers. That is what I would use if i was building a rig ever again.

For me, I usually undervolt and underclock, so I do not use too many powered risers. For the Pro BTC, I use 2 to 3 powered risers.

Do you gain hash rate by under volt and under clock?

well you can underclock memory to allow for gpu overclock without rising power usage or temp.
you can also underclock if your gpu is overheating or unstable.

carlo_0000

legendary

Activity: 1281

Merit: 1003

what is the point to under clock ? you get less speed

i overclock it but not at max, don't wanna kill my gpus
running 6 x 380's at1080 on 1200w
and 5x 380's on 1000w

tbearhere

legendary

Activity: 3164

Merit: 1003

Quote from: Bemerand on April 23, 2016, 03:49:30 PM

Quote from: notlist3d on April 02, 2015, 03:25:44 PM

Quote from: zombie007 on April 02, 2015, 01:16:11 PM

Quote from: ChemicalBoy on April 02, 2015, 12:52:27 PM

When I said rise cable with molex connector I means power riser. So yes I got it. I Check for in Google to find problem with the motherboard but difficult to find who have the problem. So maybe I need to change motherboard but the motherboard have 5 port x 1 and 1 at 16x. Normaly it have to work no ?

Depends on the behavior of the pci-e ports. It really suxx to find the correct mobo for 6 cards, especially with windows. No problem with linux most of the time.
BTC-pro mobo is pretty okay, and cheap too.

BTC-pro mobo still needed powered risers when I used one long ago to get all GPU's working. Maybe my insensitivity was to high. But 2 molex just did not do it.

There are some great powered usb risers. That is what I would use if i was building a rig ever again.

For me, I usually undervolt and underclock, so I do not use too many powered risers. For the Pro BTC, I use 2 to 3 powered risers.

Do you gain hash rate by under volt and under clock?

Bemerand

hero member

Activity: 532

Merit: 500

Quote from: notlist3d on April 02, 2015, 03:25:44 PM

Quote from: zombie007 on April 02, 2015, 01:16:11 PM

Quote from: ChemicalBoy on April 02, 2015, 12:52:27 PM

When I said rise cable with molex connector I means power riser. So yes I got it. I Check for in Google to find problem with the motherboard but difficult to find who have the problem. So maybe I need to change motherboard but the motherboard have 5 port x 1 and 1 at 16x. Normaly it have to work no ?

Depends on the behavior of the pci-e ports. It really suxx to find the correct mobo for 6 cards, especially with windows. No problem with linux most of the time.
BTC-pro mobo is pretty okay, and cheap too.

BTC-pro mobo still needed powered risers when I used one long ago to get all GPU's working. Maybe my insensitivity was to high. But 2 molex just did not do it.

There are some great powered usb risers. That is what I would use if i was building a rig ever again.

For me, I usually undervolt and underclock, so I do not use too many powered risers. For the Pro BTC, I use 2 to 3 powered risers.

carlo_0000

legendary

Activity: 1281

Merit: 1003

old post but i wanna confirm that

ASRock B85 Anniversary runs 6 gpu's

if it s not working it s because you have to short the pcie 1x pins, for the card will be detected

list of intel board what run 5 or 6 gpu's
https://proxy.crushus.com/bitcointalk.org/index.php?topic=1284889.60

totoy

hero member

Activity: 623

Merit: 500

Quote from: tbearhere on April 05, 2015, 03:58:09 PM

And use powered risers. And get these hold down clips. http://www.miningcryptocurrency.com.au/store/p4/RiserSafe_By_the_Inventor_Patent_%28Pending%29.html

hmm, that looks nice Cool

duboisi

full member

Activity: 202

Merit: 100

Try this: plug in all your 6 GCs, then run the install CD that come with the GC.

crunck

legendary

Activity: 1176

Merit: 1005

crunck

I had an issue similar to this and my problem were some of the cards were in idle mode as the MB though no monitor was connected.

My answer that fixed this was to buy a few dummy plugs which tricked the MB into thinking a monitor was connected, there really cheap on amazon or fleebay

tbearhere

legendary

Activity: 3164

Merit: 1003

And use powered risers. And get these hold down clips. http://www.miningcryptocurrency.com.au/store/p4/RiserSafe_By_the_Inventor_Patent_%28Pending%29.html

Oscilson

sr. member

Activity: 434

Merit: 250

You may require to short the PCIE pins (A1B17 or A17B1?) to make the system aware of the cards?

Amph

legendary

Activity: 3248

Merit: 1070

Quote from: ChemicalBoy on April 02, 2015, 12:52:27 PM

When I said rise cable with molex connector I means power riser. So yes I got it. I Check for in Google to find problem with the motherboard but difficult to find who have the problem. So maybe I need to change motherboard but the motherboard have 5 port x 1 and 1 at 16x. Normaly it have to work no ?

yeah but it is not made for that, it could break due to heavy load of current, you could have bought h81 pro btc, it is made specifically for mining, with two 4 pin molex

i used it to power six cards no problem

Quote from: notlist3d on April 02, 2015, 03:25:44 PM

Quote from: zombie007 on April 02, 2015, 01:16:11 PM

Quote from: ChemicalBoy on April 02, 2015, 12:52:27 PM

When I said rise cable with molex connector I means power riser. So yes I got it. I Check for in Google to find problem with the motherboard but difficult to find who have the problem. So maybe I need to change motherboard but the motherboard have 5 port x 1 and 1 at 16x. Normaly it have to work no ?

Depends on the behavior of the pci-e ports. It really suxx to find the correct mobo for 6 cards, especially with windows. No problem with linux most of the time.
BTC-pro mobo is pretty okay, and cheap too.

BTC-pro mobo still needed powered risers when I used one long ago to get all GPU's working. Maybe my insensitivity was to high. But 2 molex just did not do it.

There are some great powered usb risers. That is what I would use if i was building a rig ever again.

are you sure? in my case i did not use any powered molex

because two molex can provide 132w of each plus you have 25 w x 5 pcie x 1 and 150 from x16

so a total of 132 x 2 + 125 + 150 = 539

to this you add the pci-e from psu who should provide additional 75+150 for each cards(let's assume a gtx 970)

in the end you have a basee of 539 + 225(for each cards, this is more than enough

notlist3d

legendary

Activity: 1456

Merit: 1000

Quote from: ChemicalBoy on April 02, 2015, 06:49:29 PM

Oh then I should buy and try with the mobo BTC-PRO and buy USB Power Riser, Wink

What about the Dummy Plug ? No one say something.

Oh thx for your answer you help much ! Maybe its just about the mobo. Thx all

I never used a dummy plug but it's been so long I might have had monitors on my rigs.

The BTC PRO is not necessary the best mobo. I would get some more current advice in altcoin forum. BTC PRO was a pain when i used it. But I also didnt have powered risers on them.

ChemicalBoy

newbie

Activity: 3

Merit: 0

Oh then I should buy and try with the mobo BTC-PRO and buy USB Power Riser, Wink

What about the Dummy Plug ? No one say something.

Oh thx for your answer you help much ! Maybe its just about the mobo. Thx all

notlist3d

legendary

Activity: 1456

Merit: 1000

Quote from: zombie007 on April 02, 2015, 01:16:11 PM

Quote from: ChemicalBoy on April 02, 2015, 12:52:27 PM

When I said rise cable with molex connector I means power riser. So yes I got it. I Check for in Google to find problem with the motherboard but difficult to find who have the problem. So maybe I need to change motherboard but the motherboard have 5 port x 1 and 1 at 16x. Normaly it have to work no ?

Depends on the behavior of the pci-e ports. It really suxx to find the correct mobo for 6 cards, especially with windows. No problem with linux most of the time.
BTC-pro mobo is pretty okay, and cheap too.

BTC-pro mobo still needed powered risers when I used one long ago to get all GPU's working. Maybe my insensitivity was to high. But 2 molex just did not do it.

There are some great powered usb risers. That is what I would use if i was building a rig ever again.

Topic: HELP TO CONNECT 6 GRAPHIC CARDS (Read 4916 times)