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Enough Power?

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July 12, 2012 3:02:19 AM

Building my new workstation but am starting to wonder if the PSU will have enough power? I'm looking at the Corsair Professional Series Gold AX1200 SLI Certified 80 Plus Gold Certified. Here is the list of parts.

-Asus Z9PE-D8 WS Mobo
-Dual Intel Xeon E5-2687W
-Dual Noctua NHD14 140mm
-32GB of 1866 DDR3 Memory
-Blu Ray Burner
-2 240GB SSDs
-8 1.5TB 7200rpm drives in RAID 5 with an Areca Raid card.
-3 GTX 580 3GB video card
-Black Magic DeckLink card
-Lian Li PC-Z70A case

Any thoughts on if I have enough juice please let me know...about to pull the trigger. Thx.

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July 13, 2012 4:11:04 PM

Anybody with any advice? The calculators I have run all say I will be pulling well over 1500 watts at load! Since this is a workstation build it will be at load often. Sounds like there isn't a big enough PSU out there, or will I be able to run all this on a 1200 or 1500 watt PSU?
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a b ) Power supply
July 13, 2012 5:28:56 PM

Since you've asked here twice and gotten no answer, I'd try here: http://www.jonnyguru.com/forums/forumdisplay.php?f=3

When Tom's reviewed the E5-2x series they seem to have used a 1000w supply, but not so many gpus: http://www.tomshardware.com/reviews/xeon-e5-2687w-bench...

That system isn't vastly more powerful than mine (1 3930k and as many as 3 gpus) and I've never seen it draw more than 650w out of the wall, so I suspect 1200 is fine, but given the investment you're making, I wouldn't take my word for it. I'd look at what the people who pre-build such workstations use (I think the answer is multiple redundant psus) and find a more enterprise oriented discussion alias.

Are you sure you can fit two NHD14s onto that motherboard? Do you need to?
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July 13, 2012 6:04:26 PM

Temile said:
Since you've asked here twice and gotten no answer, I'd try here: http://www.jonnyguru.com/forums/forumdisplay.php?f=3

When Tom's reviewed the E5-2x series they seem to have used a 1000w supply, but not so many gpus: http://www.tomshardware.com/reviews/xeon-e5-2687w-bench...

That system isn't vastly more powerful than mine (1 3930k and as many as 3 gpus) and I've never seen it draw more than 650w out of the wall, so I suspect 1200 is fine, but given the investment you're making, I wouldn't take my word for it. I'd look at what the people who pre-build such workstations use (I think the answer is multiple redundant psus) and find a more enterprise oriented discussion alias.

Are you sure you can fit two NHD14s onto that motherboard? Do you need to?


Thanks for your response!

It's funny you mention Jonnyguru because I only just discovered his site this morning researching Power Supplies. Based on one of his reviews I'm now looking at the Lepra 1600w which has a peak of 1700. It's only about $30 more than the Corsair 1200XT. I will definitely post my question on his forum. Thanks again.

If I step "down", in my case, to 3 GTX 680 4GBs the power use comes down a bit. However the 580s are still kicking the 680s butt in cuda computations with DaVinci Resolve, Adobe Premiere Pro, and After Effects. The 680s only just got certified for After Effects and are still currently unsupported with Premiere. Also the 9 drives and 2 SSDs add up to a bit of a power pull too. I could drop to a 6 drive RAID but I like the speed and flexibility of 8 drives.

Funny you mention the Noctua's. I have been getting worried about the sheer size and weight of those heatsinks in a vertical config for years to come. I did discover that they will barely fit the board. I just really want the quietest, low maintenance options I can get without spending a ton of money on replacing fans and such. I am considering the Corsair H80s as well and swapping out the fans with Scythe Gentle Typhoons or Noctua's...but that can get pricy and I can't find any real thermal numbers for that setup with the E5-2687Ws. Any recs?

Thanks.

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a c 158 ) Power supply
July 13, 2012 6:05:20 PM

What will it be used for that requires simultaneous maximum power draw from 8 HDDs, 3 GTX 580s and 2 Xeon 2687s? The only way that you're going to come close to exceeding the AX1200's capacity is to have simultaneous maximum power draw from every component in that workstation with OCs in place on the CPUs/GPUs. Potential power draw by parts:
1. GPU SLI: 736W
2. CPUs: absolute maximum of 150W each...you won't go past 125W in real life. 260W
3. 8 HDDs: 25W is the rated max...real world won't exceed 15-18W. 144W
4. SSDs: 7W for a 14W total
5. Blu-ray burner...18W
6. RAM...15W
7. Decklink...15W
Total: 1201W
The thing is that you'll never max out every...single...component at the same time. The workstation may experience high loads on a regular basis, but maxing out the high-end estimates of every single component simultaneously for extended periods of time is unlikely.

If you think that you need the extra juice, then it will cost you...some options:
1. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
2. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
3. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
4. http://www.newegg.com/Product/Product.aspx?Item=N82E168...

I truly think that the AX will be good.
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July 13, 2012 6:16:07 PM

Rugger said:
What will it be used for that requires simultaneous maximum power draw from 8 HDDs, 3 GTX 580s and 2 Xeon 2687s? The only way that you're going to come close to exceeding the AX1200's capacity is to have simultaneous maximum power draw from every component in that workstation with OCs in place on the CPUs/GPUs. Potential power draw by parts:
1. GPU SLI: 736W
2. CPUs: absolute maximum of 150W each...you won't go past 125W in real life. 260W
3. 8 HDDs: 25W is the rated max...real world won't exceed 15-18W. 144W
4. SSDs: 7W for a 14W total
5. Blu-ray burner...18W
6. RAM...15W
7. Decklink...15W
Total: 1201W
The thing is that you'll never max out every...single...component at the same time. The workstation may experience high loads on a regular basis, but maxing out the high-end estimates of every single component simultaneously for extended periods of time is unlikely.

If you think that you need the extra juice, then it will cost you...some options:
1. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
2. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
3. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
4. http://www.newegg.com/Product/Product.aspx?Item=N82E168...

I truly think that the AX will be good.


Thanks Rugger. Exactly my thoughts as well. I doubt I will ever fully pull the max out of everything. I appreciate the break down of components as well. Soo are these calculators like the one at Thermaltake that off? Even at 90% load it says I would pull just shy the 1500 watt mark.

I do plan to overclock the GPUs a bit and push the ram a bit as well. It's usual work load will be Rendering 3D and 2D work.....32 threads at max with 1GB or memory assigned to each thread or 16 threads with 1.5-2GBs assigned to each thread. I also do a lot of color grading and that's where the GPUs and drives come into play. 10bit 4K media at 600MBs-900MBs off the RAID with the GPUs at 100% rendering out of DaVinci Resolve for up to two days straight, writing back multiple TBs. System is surly gonna get pushed....but as far as every component....well I doubt the Blu-Ray drive will ever be included at least ;)  I currently get alarms from my 1500 APC unit for pushing over it's threshold.
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a c 158 ) Power supply
July 13, 2012 6:33:04 PM

What happens is that all of the mfrs calculate their power estimates and add some cushion. Then the calculators come in and add their own cushion. Then PC users like to add in their own cushion. The result is that PSU requirements are vastly overestimated...the PSU mfrs love it because they get to sell $400 PSUs to people that could get away with a $150-200 PSU or less. I'd love to see the power draw of that system from the wall with a Kill-a-Watt meter...any chance you'd be willing to post some numbers?
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July 13, 2012 6:44:03 PM

Rugger said:
What happens is that all of the mfrs calculate their power estimates and add some cushion. Then the calculators come in and add their own cushion. Then PC users like to add in their own cushion. The result is that PSU requirements are vastly overestimated...the PSU mfrs love it because they get to sell $400 PSUs to people that could get away with a $150-200 PSU or less. I'd love to see the power draw of that system from the wall with a Kill-a-Watt meter...any chance you'd be willing to post some numbers?


Hey Rugger. Thanks again, and makes since. The Killa-a-Watt meter from the wall may be a bit beyond me as I have never dealt with such issues of power draw. But I know a guy who is super versed and probably has one. When this system is built I will see if I can get him to come and measure it.

I did add 2, 20am breakers to a dedicated outlet in my office so I wouldn't flip breakers with my home setup. Lights would flicker in here before ;) . Currently running an old dual 3.0Ghz quad core steup (8cores) with 17GB of ram, 5 drives, a Video IO board (AJA Kona 3), an ATTO R380 raid card, an external 8 drive RAID 5 SAS, a 30" LCD, a 24" LCD, a 17" JVC Pro Broadcast CRT with SDI card and input, Client Monitor, Drobo, Printer, Scanner, Router, and a large Wacom Tablet. 1/3 of that on a APC Smart 1500 UPC and 1/3 on a 700w UPC,...both on the dedicated breaker, and the last 1/3 on the house office breaker. Then I will be adding this beast into the mix with it's own APC. Not looking forward to the power bills and the heat of the room is already bothersome :??: 
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July 24, 2012 5:03:14 PM

Best answer selected by ViperJPB.
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