Topic: My second ZEC + XMR+ ETH thread builds info links thoughts and photos. - page 13. (Read 148017 times)

AriesIV case is in his sig - I think thats a better build compared to this one.

I posted this 4U 8U chassis link in my earlier post.

The Sapphire 480s Reference are modded for ETH Eliovp's 29MH-low energy rom, so the cards are cool & steady currently mining ZEC. I sold him these cards from my current farm.

Frankly....  after building this rig with him the whole day, with fair share of drama (the rig failed to POST the first few times)..... I appreciate the Panda even more.

Nice rig !

Care to share the rig case brand/model ? Also same for this AriesIV case (tried to look for it @google but didn't find it)

Great Build - Good Looking!  Have you taken a look at the gpu temps/fan speeds yet?  This would be a Push system (the fans push the air into the rig) and air escaped through the least resistance.

You are right Quintleo,  just rang up my friend and confirmed that the chassis dimensions.
It is also rack mountable, when he came to visit he didnt bring the rack mount kit.

Color: black panel, white box
Material: panel SGCC all black sand grain, box 1.2 mm thick steel plate
Dimensions: 420mm*440mm*311mm (length * width * height)
Motherboard: ATX 12 "*9.6" (305mm*244mm)
Power supply: two ATX standard desktop power supply
Graphics: the maximum can be loaded with 7 340mm length of the card
Hard disk: 3*3.5 hard drive or 6*2.5 drive
Heat dissipation: 12 6 double ball high power fan
Package size: 580*580*425mm (length * width * high) packing / double double carton
Weight: 15.2kg

https://www.aliexpress.com/item/Rack-type-GPU-machine-multi-card-case-dual-power-card-heat-dissipation/32750205586.html?

 That case pictured, *IF* it is rack mountable, appears to be an 8U case.
 It's not even CLOSE to being a 4U case.

 By specification, a 4U case cannot be more than 7" in height.

 That case pictured, *IF* it is rack mountable, appears to be an 8U case.
 It's not even CLOSE to being a 4U case.

 By specification, a 4U case cannot be more than 7" in height.

In return, I helped him build a 6x480 rig using a 4U case which I was also interested in before this Panda came by.

Geeze lol! Why does he keep spending 95% of his time on ZEC when it has been well below both ETH & XMR in mining profitability for many weeks in a row now?  Yeah, I get that there is not much more room for improvement with ETH mining but XMR seems to have some room, esp for 470/480's, since those were not even out when he made his XMR GPU miner.

Just to let ya know, Claymore said this yesterday for Zcash (ZEC)

"I will release new version with good speedup within 24 hours."

 I think I'm reading that as they have 47 ohm resisters in line - which is gonna drop those Deltas to 3 volts or so *if* I'm correct and the fans won't turn at all a that low a voltage.
 Might be 4.7 ohm though - the listing is VERY unclear - which would be a fairly small voltage and speed drop but the resistor better be a lot bigger than it looks like (at LEAST a 2 watt and even that would probably be very marginal at best, 5 watt would be better for some safety from overload and overheat).

I like them  not sure is they can carry a 0.80 amp max load.

For 12 bucks I will order them now.  They could make the miner much quieter.

When my pandaminer does zec  the heatsinks are only about 40c

Yes he's using a 6 pin power cable to power the riser AND a 8 or 6+2pins power cable to power the gpu. Most risers have molex or sata connector power input, but there is newest version that has a 6 pin connector directly hence bypassing the need of a sata to molex adapter to power the riser. You even have some motherboards that also has additionnal power connector reserved for the PCI-express slot to give them more power. Using GPU power supply + motherboard power supply + riser power supply you smooth out the load between different power lane of your PSU, smoothing the power output. so it's all good

hmmm... but how does this provide enough & even power to the GPUs?  Most of what I have read indicates that IN ADDITION to the riser power, the 6+2 pin connector coming from the PSU must be plugged directly into the GPU. Maybe I'm missing something but I thought there is supposed to be a balance between GPU power coming from the PCIe slot/riser and directly from the PSU via the 6+2 pin connector. Is this not correct?

I do not use the SATA to 6 pin PCIe adapter.  I just plug a 6 pin PCIe cable in from my PSU directly into the USB riser.  I believe that is the best way to power them.  I did not get the SATA to PCIe adapter, but from the pictures the gauge of the wires look like they are of a heavier gauge than the regular SATA or Molex ones but I'm not 100% sure on that.

This is quite interesting!  So, to make sure I understand correctly... these risers are powered by converting the sata plugs coming from the PSU to 6-pin PCIe-type power (instead of either sata to molex or molex to molex)?

Is this a legitimately better way to go than the sata to molex type?  I had always avoided that on my GPUs since I heard several people saying that this caused problems due to wrong voltage pull or something like that. So, I had always gone molex to molex, but of course, that is also why I am always short on molex connectors since I would need 3 x 2 for GPUs and 1 x 2 to power my BTC pro r2 Mobo.  Needing 8 molex on 4 cords sucks when even 1200W Plat PSU only comes with 2 x 2.

So, if I understand this correctly, using these 6-pin adapters, I could make use of the extra sata cables/connectors for 6 GPUs... meaning I would really only need 2 molex to power my mobo?  If true, is there still a limit of 2 GPUs per string?  Or could I reasonably put 3 per string?

That USB riser is still working perfectly for me thank you very much.  Before putting that riser in I was getting constant system crashes and reboots with the old riser.  The old riser had a molex connector on it and the molex to sata adapter melted a little it.  It was not noticeable until I removed it from the system and you could see some of the melted bits.  Using the 6 pin PCIe directly so far I've had no problems nor do I expect any power problems with this riser.  Thanks again Phil!

https://bitcointalksearch.org/topic/a-review-and-an-apology-to-forum-member-itop-1744064

http://www.itopshop.net/pcie-1x-to-16x-pcie-riser-with-6pin-power-connector-version-6-p-303.html

http://www.ebay.com/itm/272456808280?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649

Thanks Citronick, I appreciate your insight on this issue.  I understand and agree with what you said about sticking with the reputable brands. In fact, my 2 mining PSUs are both Rosewill Quark (1kw and 1.2kw), both of which I like very much, hence looking at another Rosewill for rig #3, just Gold vs Platinum. By all appearances on NewEgg, this Capstone appeared to be inline quality wise with the Quarks as both had 4-star reviews. However, the difference became evident between the 2 in reading the in-depth reviews that Phil linked to.  If it was just the 2% difference between Gold and Plat, I would buy that Gold right now, but the build quality appears to be noticeably worse, even though from same brand, which is why I opted not to buy it.  I will probably just wait until that 1200w Quark drops in price again and stick with that.

As to your comments about RAM and GPUs, I'm not sure it can help much in my specific case. Firstly, I am not in the market for multiple sticks of RAM (at least not past the 2 i will need for rig #3), so there would be no possibility for volume discounts there.  However, I do have a question about quantity of RAM needed for mining.  Both of my rigs so far have 16GB of RAM (2x8GB).  Is this overkill?  Could I get by with 2x4GB instead?  I would primarily be GPU mining ETH/XMR/ZEC and CPU mining XMR, so maybe this is an area I can save in?

As for bulk discounts on GPUs, I doubt that 6 would qualify me for this. I'm under the impression that I would need to be more in the 15-20 range for a distributor to even talk to me, and that's not going to happen any time soon. I think i will be good at 3 rigs for now, unless of course crypto prices go crazily high in the near future.  Of course, I said the same thing after planing rig #2, so who knows