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Post by smokey on Oct 24, 2012 10:47:08 GMT -8
i dont have side panel on..... but in test i notice GPU1 usually about 10c hotter than GPU2 which is to be expected
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F1Fan07
Race Director
Ludicrous speed. Gone to plaid.
Posts: 9,366
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Post by F1Fan07 on Oct 24, 2012 11:07:08 GMT -8
On my MB the two cards have good separation and the temps are about 5C apart. The fan I got will blow straight into the gap between the cards and should equalize their temps.
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Post by smokey on Oct 24, 2012 11:40:54 GMT -8
yeah theres a fair gap on my board tbh as gigabyte cards are so thin heres gpuz of both at idle   |
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Post by zero7159 on Oct 24, 2012 16:06:50 GMT -8
So I'm completely at a loss as to what's causing my video crashing but I don't think it's the cards. The other night rF2 would crash during a 5 lap F2 race and I could reproduce it. Looking at the minidump logs it's always the Nvidia driver taking the system down with a bad memory write. So I started noting some posts on the EVGA forum about VRAM overheating and decided to do a severe test. Last night I ran the Heaven benchmark at max settings for over an hour. No crash even though the cards were at 100% for the whole time). I then loaded rF2 with 30 AI cars and a 50 lap race and let it run. No crash. I'm lost now. The crashing seems random. Its gotta be something in the second card you added. You did not have this problem with the single card, and the 670 generally runs cooler than the prior generations of Nvidia heavy hitter cards. |
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F1Fan07
Race Director
Ludicrous speed. Gone to plaid.
Posts: 9,366
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Post by F1Fan07 on Oct 24, 2012 19:41:24 GMT -8
My current theory is at high framerate tracks one of the cards is freaking out. Winton is over 350 fps in places. I didn't crash after enabling V-sync. Some video cards will emit an audible high-pitched whine at super high frame rates (and my original one does (early production with a 9xx serial [the second card is 45xx]). See here for discussion about card noises. forums.anandtech.com/archive/index.php/t-2243730.htmlI did have these same issues with a single card but just at the beginning of ownership. I though I resolved them by switching from EVGA Precision to MSI Afterburner monitoring/control software. I just reinstalled EVGA Precision since that makes more sense with my cards. If I can't find a resolution very soon I'm starting a ticket with EVGA. |
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Post by smokey on Oct 24, 2012 20:07:07 GMT -8
maybe thats why i never have issues either i run vsync. i mean they are different maker card but basically same.
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F1Fan07
Race Director
Ludicrous speed. Gone to plaid.
Posts: 9,366
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Post by F1Fan07 on Oct 28, 2012 9:56:01 GMT -8
So crashing is gone (for now), here's the last few things I did for the record.
- Several different drivers including betas. No change.
- Downclocked VRAM. No change.
- Added side fans blowing directly onto the cards. Card temps are lower but no change.
- Vsync. No change.
- Removed EVGA Precision, switched cards in their slots (partly to reseat them, partly out of desperation), Downclocked 1600 MHz-rated memory to stock 1333 Mhz. Crashing fixed.
I'm going to bump the RAM back up to 1600 MHz if rFactor doesn't crash for a week. The RAM is performace RAM guaranteed to run at 1600 and I ran memtest86 for a couple of hours at that clock without problem. I suspect EVGA Precision is the cause (reason is that when I analyze the minidumps the crash is almost always the same line of assembly code, if my RAM was bad it'd be more random). I'm going to type up my findings and post in the EVGA forum to see what they say.
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F1Fan07
Race Director
Ludicrous speed. Gone to plaid.
Posts: 9,366
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Post by F1Fan07 on Jan 15, 2013 9:51:20 GMT -8
So..... oh man, the crashing is back for me with a vengence. I really have tried everything related to testing partsof my PC configuration short of reinstalling Windows which I don't think is necessary.
I have a new theory that I'm testing. Most of my random crashes in rFactor result in two screens frozen and the 3rd screen is white. When the PC crashed during MX-5s (which I don't mind... because I was using that race for stress testing) and I was staring at the one white screened monitor it finally dawned on me... that's the monitor connected to the 2nd card and that card is my original one that was a bit flakey even before I went SLI. My newer 670 has a serial number in the mid-4000s... the older card is a serial of 900-something so must be from one of the the first production runs.
I'm now testing for a week with just the single newer card. If there are no crashes I'll put the old card back in by itself and see if the crashing returns. If so, then I'm RMAing it.
Here's an aside. One GTX 670 vs two SLI GTX 670s... almost no framerate difference when hotlapping in rF1, rF2 and iRacing. I expected that because rF1 and iR are largely CPU-bound when using a powerful gfx card and rF2 isn't SLI optimized yet. But yeah... the second card was just consuming power and giving little in return.
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Post by smokey on Jan 15, 2013 10:38:42 GMT -8
Here's an aside. One GTX 670 vs two SLI GTX 670s... almost no framerate difference when hotlapping in rF1, rF2 and iRacing. I expected that because rF1 and iR are largely CPU-bound when using a powerful gfx card and rF2 isn't SLI optimized yet. But yeah... the second card was just consuming power and giving little in return. ya i noticed that aswell lol pretty sad really im ony running 1 card at moment as needed to use power for my fan controller so till i get another GPU power cable 1 GPU only, only difference i noticed is if i want to use fraps or similar then i notice the 1 GPU... |
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