A few things have happened since putting the Gainward GTX 670 into my computer. The first is there was some very VERY slight artifacting on the desktop on Windows with my desktop at 114hz (my monitor will do 114hz max), it went away once I lowered the refresh rate.
My friend was using my computer while I was asleep and I'm not sure what he did but the computer went into a loop of rebooting itself and making 3 beep noises, turning off then starting up this happened 6 or 7 times before I climbed out of bed to see what was the matter, I have a suspicion he was trying to shut it down as he wanted to get some sleep and tried to put it into sleep mode but I'm not sure :/. Anyway after unplugging it and promptly plugging it back in the thing booted up fine. It's been running ok apart from the next problem.
In Source based games (Counter-Strike Source, Garry's Mod etc) when moving, I have some strange tearing artifacts, now you can hardly notice them but they are there if you look for them. it's like a vsync issue but worsened, I will provide a screenshot of what I mean below (obviously this will be photoshopped as I can't grab a shot of it). This only happened in Source games and Arma 2, Heaven Benchmark etc are fine.
I figured I can live with that, and was happily browsing around on the internet today, then all of a sudden without warning the computer hard froze. I wasn't doing anything stressful just reading a forum and listening to dark ambient.
I restarted the computer and so far it's been fine. I have gone into the bios and set the ram to "auto". the bios puts incorrect settings on the 'auto' selection, the timings for the ram are 9-9-9-11 running at 1600Mhz, but the bios auto-configures it to 9-9-11-11 at 1333Mhz.
Also I only just noticed but the bios had my cpu running at 4Ghz so I manually put it back down to it's rated speed - 3.20Ghz. The computer has been running fine 24/7 for the last 2 months without issues. These problems only started when I put this card in.
Anyway so far so good, I was playing some Garry's Mod and for about 30 seconds the sorting order of the map messed up, I could see bits of the map through other bits, there were no other artifacts and no slowdowns. The computer has so far otherwise been running fine. This COULD be a buggy Garry's Mod (for those of you who play it here you know how buggy it is). and in Single Player when I launch the default map it looks full bright (no lightmaps). Again I'm not sure if this is Garry's Mod or me.
I have kept the box and stuff for the graphics card, however the ram since it has been working well for close to 2 months now I have discarded the boxes for the ram. I have very very limited space and simply do not have the room to keep boxes lying around.
Something else I've just tried is Portal 2, I was not getting the vsync issues, I was however getting quite bad framerate.
I could really really use some input on this one because It has me well and truly stumped.
My specs are...
MS Windows 7 64-bit SP1
Intel Core i3/i5/i7 @ 3.20GHz 37 °C i7 3930k
Sandy Bridge-E/EP 32nm Technology
31.9 GB DDR3 @ 666MHz (9-9-11-24) Corsair Vengeance Black (2 x 16GB packs, so that's 8 x 4GB sticks)
Gigabyte Technology Co., Ltd. X79-UD5 (SOCKET 0) 32 °C
Standard Monitor (2560x1440@100Hz)
NVIDIA GeForce GTX 670
234GB ATA Corsair Force 3 SCSI Disk Device (SATA)
59GB ATA Corsair Force 3 SCSI Disk Device (SATA)
977GB FUJITSU MARVELL Raid VD 0 SCSI Disk Device (SATA) Raid 1
PIONEER BD-RW BDR-206 SCSI CdRom Device
SB X-Fi Xtreme Audio
edit: The problem with low fps in some games was adaptive sync half refresh rate in the control panel. that's one problem solved