Okay, here's the whole story. About 2 years ago, I bought an ATI Radeon x1900 GT (v2) 256MB card from Newegg as part of an overall system upgrade that consisted of a mobo/cpu/video card. The whole upgrade centered around the video card, and it was my first PCIe, which is why I had to get a new mobo (I had AGP in the past). Here are links to all of the items I bought (from Newegg). Video card: http://www.newegg.com/Product/Product.aspx?Item=N82E16814102022 CPU: http://www.newegg.com/Product/Product.aspx?Item=N82E16819103023 Mobo: http://www.newegg.com/Product/Product.aspx?Item=N82E16813131035 Problem 1: My PSU was a 350watt 2x12v rail, with 14amps on one rail and 15 on the other. I never really saw a problem with the card and it worked fine for that whole time. The CPU was an AMD 3400+ single core. Early this past December, I upgraded to a new AMD Phenom 4x2.3ghz, with a gigabyte mobo. Newegg links here: Mobo: http://www.newegg.com/Product/Product.aspx?Item=N82E16813128081 CPU: http://www.newegg.com/Product/Product.aspx?Item=N82E16819103244 RAM: http://www.newegg.com/Product/Product.aspx?Item=N82E16820231122 Just prior to that, I got a 1TB drive for my server, so I moved the 120gig SATA drive from the server to my main gaming machine to replace my old 80gig IDE. This whole process of upgrading and moving drives required that I reinstall my OS (Which I suppose I should mention is Vista 32bit home basic). Anyway, prior to the upgrade, I had been getting artifacts, flickering, and odd stretched polys in WoW. I also played CS:S for a long time, but never had a problem there. The problems in WoW would go away if I alt-tabbed and went back in, which I guess forced a reset of the 3D view or something. So I do the upgrade and I start getting these problems a lot more... I do a little research and find out that this entire time I've been underpowering my video card. It requires 25 amps on the 12v rail, and recommends at least a 400watt PSU. It's not that simple, of course, because a 400watt PSU doesn't necessarily have all the amps you need. SO... I decide to get a new PSU. Now, being stupid, I didn't even check the rails on my current one until I got the new one and had the same problems. I got a Thermaltake 500watt with 2x12v rails, 14a and 15a respectively... then I look at the info on the 350watt that I just replaced and see it has EXACTLY THE SAME AMPERAGE on the 2 12v rails. *SIGH* and *DOH!* Still, I figure Thermaltake is a better product and 500 total watts is probably better anyway. Link to PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817153052 SOOOOO... I power it all up and it works fine for a bit... then BAM, same problem and worse than before. More flickering, and a new symptom: Complete video freeze! My other software is still running, I can talk over ventrilo and people can hear me, and I can hear them, etc... but my video just freezes. I have a dual monitor set up, and the game will freeze on the main one, and on my other one it just goes blank, like the video card stops feeding it any information (I get a "no signal" box on it). I have to manually reset the system to get anything working again. EVERYTHING works in windows just fine, probably because it's not under any sort of extreme load. I also play TF2 and since the new mobo/cpu/RAM, I have had worse artifacts and screen tearing than ever, and now it's starting to cause lockups as well, which never happened with the 350watt and single core CPU. This is where ATI Tool comes in. I wanted to see about underclocking the video card while waiting for the new PSU to arrive, hopefully to stave off the problem for a while so I could at least log in to WoW and do a few things. I also wanted to use it to test to see if it really was the video card being under powered, so I tried finding max core speed and it was insane... it shot up quickly, then get this... artifacts found over and over and it stepped back down to UNDER the default core speed (513mhz), all the way down to 400mhz before I just aborted the test. Then I did something stupid... I accidentally hit the max mem thing, and before I could cancel it, ATI Tool shot up the memory speed WAY high and my system just crashed. So I reboot, go back in to ATI Tool to make sure the settings weren't saved that way (fearing another crash), and I find it saying "Default (0.00 / 0.00)" in the selection box. I go in to settings and attempt to select the video card, and it says I have to restart ATI Tool to use that card. Fine, I do. Go back in to settings, and WTF? It's not selected... select the card again, and it says I have to restart ATI Tool, etc... rinse repeat over and over. This is all with ATI Tool 0.24. So... I see there's a new .26 out... Uninstall .24, install .26. Shoot past the stupid vista warning... and same thing. So I just avoid ATI Tool and try with RivaTuner... that shows things are right, but only allows me to go UP on my core speed and memory speed. Meanwhile I have a 650watt 1x12v52a rail PSU on order... This one: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005 That PSU came yesterday. I install it, and again things work okay for a while (making me think there's an overheating problem)... And BAM, it all starts happening AGAIN!!! So... I've got ample amperage (if I may abuse an alliteration)... so that can no longer be the problem. The thing is... could it be that the ATI Tool crash when it did the max memory testing caused physical damage to my video card? Could it be that running the card under-powered for 2 years could have done this? The problem DID start way before ATI Tool came in to the picture... but it's gotten a LOT worse since my upgrade to quad core. A few other tidbits... I have taken the cooling mechanisms off my north bridge AND GPU, and replaced the stock "grease pads" (if you can even call it thermal grease at all...) with Arctic Silver. I don't know if it's an overheating problem, but I did it just to be sure. Also, I have rigged a regular 80mm case fan inside my case to blow on my north bridge. Speedfan reports my "temp3" as being between 78 and 80deg celcius at all times, which is waaaay too damn hot. That's 176 degrees for christ sake! BUT, Speedfan is notoriously inaccurate in my experience (it once reported my PSU was providing only 9 volts on my 12 volt rail, and an actual voltometer showed the rail was just fine). No other diagnostic tool (including the Gigabyte one) shows any temperature problem... but the north bridge IS fairly hot to the touch (I can put my finger on it for about 10 seconds before the temp becomes too hot for me to stand anymore). So... is my video card simply failing after 2 years of trusty service? Did I kill it with my stupidity or shenanigans? Is my quad core simply taking too much power from it? (It's a 95watt quad core, which i understand is fairly low power consumption). Could the motherboard (specifically that north bridge) be faulty and require an RMA? Hell, is it my system RAM? Here are some other raw stats: Gigabyte Easytune 6 reports: CPU Fan: 2402 RPM System Temp: 34deg c CPU Temp: 42deg c CPU2 temp: 0? (no sensor I presume? It's not a dual socket mobo). Voltages: VCoreA 1.050V on -12V rail +3.3V = 3.340V +12V = 11.920V CPU Vid: 1.250V RivaTuner reports: Radeon X1900GT - Core Clock 513 Memory clock 657 Core temp 48.5deg c Ambient: 42 Fan duty cycle: 40.91% Fan Speed: 0RPM (It *IS* spinning though, so no idea why it's not reporting) Voltage Regulator Output: 1.16V Votage Regulator Current: 7.26A VRM phase 1 temp: 46deg c VRM phase 2 temp: 52deg c (132deg F? Wow...) AND FINALLY... after doing an uninstall of ATI Tool .26, and running CCleaner, then reinstalling .26... ATI Tool is recognizing my card again and showing the proper core and memory speeds... But I run an artifact scan at default speeds and after about 20 seconds I get 2 (and always in the same spot), and shortly after that, more and more and more... until the system crashes. Crazy, eh? So please, tell me what the problem is... it's driving me batty!