7GPU build is losing its mind freezing. Testing for failed parts is tedious
Feel free to laugh at my career ending $12,000 blunder. I did have this whole thing stable for about 1 day, but now it's all gone to hell. I attempted a server rack mounted build similar to the Linus 7 gamers 1 PC video. Parts List:
Asus X99-E WS/USB3.1
i7-6900k 3.2Ghz 8-core
CORSAIR Vengeance LPX 64GB (4 x 16GB) DDR4 DRAM 2400MHz C14 memory kit
Samsung Pro 960 512GB boot NVMe
7 MSI 1080 Ti Aero OC cards with the EK water blocks and hepta connector
1 Corsair AX1500i wired to all parts + 4 GPUs
1 HP bitcoin mining centric GPU only PSU wired to remaining 3 GPUs
3 XE 360 rads, Dual D5 Revo pump, and a bunch of other small water parts.
Windows 10 Pro x64 and Nvidia 384.94
This build will run for a long time with the last 3 GPUs mining.
it will run for a long time with the first couple GPUs mining, usually longer.
in the first couple days it appeared to be stable with 4 air cooled stock cards running 100% off the 1 Corsair PSU...
it will freeze almost immediately with 5 or more GPUs at 100%
burned all GPUs in with stock air coolers before switching to water.
no PCIe risers are used
above 4G decoding is enabled.
a couple bios settings have been tested at Auto vs. Gen2 with no improvement.
Bios setting for has been shift from auto to forced x16/x8/x8/x8/x8/x8/x8 with no improvement.
no BSOD, no events records, no power overload resulting in a click and a black screen, just freezes, indefinitely.
Nothing I have the ability to measure temps on gets hot or overheats, although i suspect those PCX chips next to the south bridge. never seen the cards or CPU get above 49C.
I saw 1 single run of memtest86+ produce 21000 errors, and could never reproduce it.
I tried moving it from a 120V environment to a 208V environment to get more Watts out of those PSUs
I've measured the HP 1200W running around 900-950W with it's 3 1080 tis
I've tried running the middle GPU (4) on it's own 500W PSU to see if maybe the Corsair was getting overwhelmed.
I've measured the Corsair around 1000W just before a freeze.
I'm kind of stumped, and the whole.... water thing is making it really hard to swap parts around and mix and match. There's no way to add one card at a time. and try again. I can only test by disconnecting some of the cards from 12V.
I just received a new ram kit, new CPU, and new mobo, so i have some stuff to test with.
Any thoughts? personal experiences to draw on? At this point, I'd settle for just random ideas? Should I try rolling the Bios from 3502 back to 3402? Maybe run all GPUs off external power and only the motherboard and CPU off a main PSU?
I almost RMA'd my PSU and GPU after thinking they had coil whine. But the real problem was I had a Trojan which was Bitcoin Mining in the background 100% of the time my PC was on (3669 points, 386 comments)
/buildapc: I recently wrote an extensive article about how SSDs work. I am joined by Kent Smith of SandForce. AMA about SSDs, NAND, & Controllers! (606 points, 247 comments)
UPDATE: /buildapc: I'll be talking to all the major hardware vendors at CES 2014. Do you have any technical questions you'd like me to pass along to the engineers? (493 points, 89 comments)
RAM Benchmark: Dual- vs. Single-Channel, how dual-channel works, addressing myths (no such thing as "dual-channel RAM"), and channel performance in After Effects, Premiere, gaming, & engineering apps. (Article suggested by PCPartPicker manirelli) (482 points, 113 comments)
[Build Help] $1500 gamer, multi-screen capability, with some scryptcoin mining/protein folding/video editing on the side
I tried this in /buildapcforme and didn't get any response, but I don't think I need help from scratch since I already have an idea of what I want in terms of parts, so here's a shortened copypaste: Uses:
Modest gaming - No more than 1080p gaming as high of quality before framerates dip below 40. I play poorly optimized FPS games (BF4, Arma/DayZ), other common titles (GTA5, CSGO, Skyrim, indies) and love to crank out stupid high quality graphics out of Flight Sim X, hence the want for triple monitors
Future proof. This is the last computer I want for 5-10 years, but I'm not opposed to upgrading individual parts.
triple-monitor capability as a desire but not a requirement
Bitcoin/Scryptcoin (Litecoin/Dogecoin (very moon)) mining and protein folding in the meantimes. I'm not looking to make a large profit by any means, so don't include this in your build thoughts if you'd rather not worry about it. I just want to put my PC to good use when I'm not using it.
HD video editing.
Matlab and CAD (Solidworks & Electromagnetic modeling)
Dual-boot with various linux partitions.
Budget: As cheap as possible. I'll go over no more than $2000 if need be for the triple-monitor capability.
Will you be overclocking? If yes, are you interested in overclocking right away, or down the line? CPU and/or GPU?
Down the line. I'd like to see more about benefits of OCing.
If there's any specific features you want/need from the rig, please list them.
Good cooling is a must for high GPU intensive processes (mining, folding).
Watercooling is a plus if it provides better performance than air.
SSD = YES.
Do you have any specific case preferences such as a window or LEDs, or do you have a preference for low-noise components?
Don't care about having a snazzy case...i'd make one out of plywood tbh.
USB and audio on front.
Noise isn't a big deal.
I've read the logical increments guide, and it looks like the enthusiast level is right for me. I'd like to get the price under $1,500 though. I want a PC that is at the knee of the price vs. performance curve.
Prices include shipping, taxes, and discounts when available.
Generated by PCPartPicker 2013-12-25 05:31 EST-0500
With that build, what are your thoughts on the 2x R9 280x's? I'm having trouble finding comparable benchmarks, other than this which only compares it to lower-scoring GPUs. I see them as providing a fair amount of number crunching capability (aka mining), as well as being still top-of-the-line graphics for gaming. I probably shouldn't concern myself with mining if I can get a better performance out of games with a single GPU for less $. I've never SLI'd or CF'd and everywhere I see it mentioned, I notice people have problems with it or that it doesn't always work. What should I know about multi-GPU setups? I notice a lot of budget builds use an AMD CPU. How much can I expect out of the 4770k over a similar AMD cpu like the FX-9590 or 8350 (a much cheaper one), aside from the marginal chance in benchmark scores? I could save getting a cheaper PSU probably. I live near a Microcenter. I'm guessing their prices are lower for pickups. Sorry for the long post. I hope it doesn't scare anyone off! I'm just not going to drop $1,500 without properly educating myself first. Thanks!
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