UPDATES on my big old bag of woe. I highlighted summaries and questions if you don’t want to read all the testing back and forth.
And again, thanks for all the help.
OK, so I tested the motherboard/cpu for their temps. Seemed fine, but just to be safe I installed a Silverstone AR03 cooler for the CPU I had previously purchased but didn’t install yet. It is taller and more open on the bottom and allows more air flow around the RAM and NB.
AIDA64 and HWMonitor were reporting the same things. After running Prime95 (tried a couple tests for 30 minutes or so then left it on “Blend” overnight), The CPU temp reached 49c, the cores mid- 40s c and the MB reached 30c (usually the temps were lower).
I played a game on a single screen with AIDA64 running on another, I was watching for any temp anomalies. I didn’t see any. Games still crashed within 10 to 15 minutes.
At this point, I still had one 290 with an aftermarket Arctic III Xtreme cooler on it, and one with the stock reference cooler on it (the one I had to RMA). As normal, the reference cooler was getting really hot. I know it is designed to run at 95c and the vrm has been known to get that hot as well, but I thought, “HEY, that seems too hot”, so I put an Arctic III cooler on that as well.
Temps on the 290s now (top one runs hotter about 10c than the bottom one) never go over 70c for GPUs and VRMs. Running Heaven the GPUS average 58c and the VRMs reach about 65c. I have a lot of air blowing over these things (so much so that I should have just left the stock fans on… almost).
Games still crashed in 10 to 15 minutes.
Temperatures seem fine. So I said screw it and got a Seasonsonic 1000w PSU and installed it.
SUCCESS… sort of. Games ran stable, and though I didn’t write down bench marks, I think I gained about 5 to 7 FPS on the TombRaider 2013 benchmark (maybe).
HOWEVER, instead of crashing after 5 to 10 minutes, I’m getting crashes around the 30 to 45 minute mark (which makes testing a little more difficult). I tried 3 games TombRaider, ACIV, and BF4.
Last night I removed ONE card, played bf4 for an hour and a half. Went right from there and left the TombRaider (heh Tom Braider) bench mark running for 2 hours. No problems. Tonight, I plan the same tests again with the second card (despite already trying this and ruling the cards out).
Then I clicked on the Memory Tab in CPUz and noticed that my Memory Latency was slow compared to what I thought it was. That got me looking at my BIOS settings.
The Motherboard is a M5A99FX Pro R2 by ASUS. Newest BIOS installed. Previously, everything was set to “Normal” and AUTO. So I went into the bios and “fixed” the ram by a lot of googling and changing a setting to a D.O.C.P. profile. 2 hours of Prime95 testing and everything was ok.
With one video card in, everything seems stable and with nothing else to do I decided to try the “Optimal” setting from the “Basic” screen in the bios. From what I understand it’s a basic / mild Overclock (it set me to 4.3 GHz). 10 minutes in I had 2 workers stop in Prime95. Put everything back to normal then tried the O.C. Tuner from under the advance tab. Again, workers quickly stopped. For the heck of it, I tried the CPU tuner from inside CCC. Again, not stable. I tried Optimal again, went out for night and when I checked, again 2 workers stopped within 15 minutes, then none of the others for the next 6 hours.
I’m not an overclocker. Don’t really know anything about the details of it, but I’ve been reading. The automatic OC solutions tried to get the CPU up to around 4.3 GHz. As a test I changed just the multiplier from 20 to 21 and it also was unstable. At no point in my OC testing did the CPU, COREs, or MB get up to 60c.
I STILL can’t get my 290’s to play a game in crossfire for over 45 minutes, and I have no idea what to try next. The new PSU “helped” but didn’t “fix”.
Here is my question, does the inability to OC the CPU seem odd? Isn't it odd a better PSU helped? Could there be something latent and lingering in the Mother Board? The CPU? I feel like I just can’t win.
Thank you again for ANY help or opinions. I do appreciate them.