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CM V1000 - Strong Enough for 4x 7950s? - Page 2

post #11 of 19
if you are mining and not doing anything with the CPU, then I don't see a big issue with a quality 1kw unit. 7950 is a 200w card. even if you allocate another 50w on top of EACH card (not sure you'll need that much) it'll only be slightly over. which most high quality units can handle w/o issues. fans will be loud, but i suspect that's less of a concern if you are blasting 4x7950's to the max already biggrin.gif just make sure you get good airflow (VERY tough for 4 GPU unless you go custom liquid) safer bit is as suggested a 1200w unit. I doubt you'll use up the 1kw unit though, but the 1200w should give slightly better efficiency on the electric bill
post #12 of 19
Quote:
Originally Posted by hammong View Post

They make PCIe x1 to x16 extenders? Wow, who knew. LOL.

Greg

even using USB, haha

http://www.ebay.com/itm/321138325762?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
 
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post #13 of 19
Quote:

imagine how many 7990's you can install over a USB hub biggrin.gif
post #14 of 19
Thread Starter 
I apologize. It's completely my fault for not explaining things correctly.

For mining, all I need is a cheap CPU, a decent motherboard w/ 4x PCI-E Slots (Even if they are 1x Slots, they just need to be PCI-E), roughly 1GB of RAM per card, a quality PSU, and PCI-E Risers for each slot.

The System will actually be built inside a plastic storage crate and not a cramped computer case so the cards will be in the open air with air conditioning and a large floor fan blowing on them.

The bandwidth of the slot does not effect the speed for this task. A 1x will run the same speed as a 16x, and I will use risers to mount them near the top of the crates and up off the motherboard.

I will also be using powered PCI-E Risers for the 1x to 16x Slots which should ensure that there isn't too much power being drawn from the motherboard.


Is there any chance I will have an issue out of only 1000w? I don't want to risk anything, especially if it could possibly ruin my cards or power supply. I'm trying to keep the build as cheap as possible but I'm not going to do so at the cost of risking all the components. What do you guys think of the CM Silent Pro Gold 1200w or CM Silent Pro Hybrid 1300w? I found fairly good deals on those.
Edited by Melee - 8/7/13 at 1:11am
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post #15 of 19
Ignore the naysayers, a quality 1KW unit si plenty for such a setup, even with consistent overclocks.
post #16 of 19
When my 7950 was at 1.3V I was pulling maybe 3XXW I think while mining. If you go that far, cooling can become an issue.

I noticed I could do some pretty neat things with my 7950 like slightly overclock and undervolt.

I would see how far you can get with overclocking before you need to raise voltage at all on the GPUs. I also suggest a killawatt; why guess? They go for 10-20$ on amazon usually smile.gif.


If you don't overvolt, I think you can run all 4 off of the 1KW PSU as long as it is good quality.
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post #17 of 19
It's sort of a strange application. The PSU will be running at around 80% load for, I presume, months at a time. The PSU should handle it, but I won't guarantee it. If the PSU does fail, it is warrantied. And it has a full suite of protection features, so it's unlikely to damage your system.
post #18 of 19
Quote:
Originally Posted by Phenomanator53 View Post

Mining does not eat CPU So there is no point putting anything better than a single core.

for the power consumption, please have a look at this video: http://www.youtube.com/watch?v=7epu4oEQVR4

4x GTX 480 + OC'ed 980X draws peak 1100w. im sure the 7950's don't draw nearly as much power as the 480's
Trust me I know power consumption, but Linus doesn't test it long term. Its safer to have more power due to the power loss from the fatigue on the psu from drawing so much power and being on so long.
Didn't realize it was for mining though.
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post #19 of 19
Quote:
Originally Posted by Original Sin View Post

Ignore the naysayers, a quality 1KW unit si plenty for such a setup, even with consistent overclocks.

confucius says : he who argues with sin is an idiot biggrin.gif

there you have it tongue.gif besides phaedrus also gave a thumbs up... you wont find more reliable confirmation anywhere when both sin and phaedrus agree on the application smile.gif
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