GTX 580 3dm VANTAGE High, ISSUES

Hello, I am having issues when running vantage in HIGH settings, In Performance it works fine, But in High it sometimes starts fine and then suddenly FPS drop a lot and stay low for the rest of the test, sometimes it starts slow from the beggining, and sometimes the test finishes with normal fps and normal score, I m running driver 266.58, not overclocked card, and it gets up to 90c in vantage, In 3d mark 11 p test it runs fine, but I am unable to test in high setting there, (have free version) Any help would be appreciated.

core i7 2600k, psu thermaltake tr2 rx 650watts, asus p8p67 win7 32 bit.

Nobody has had such issues?, please help so I can track down the problem. After further analysis, The low fps appear also in performance test, however, since I changed the power management mode in nvida control panel from adaptive- to prefer maximum performance the slow fps issues have not appeared again, I am just wondering If that is a known issue, or my card is faulty.

never seen this...

Hm, I can't seem to find a single review about that power supply. It sounds like a power supply issue to me as my 470 was doing that when I was running an el cheapo PSU on it. High would be putting more stress on the card which theoretically should draw more power which could be causing that. Do you have a stronger power supply you can test with?

This is a thermaltake psu tr2 rx 650watts, there are no reviews about this specific psu, however there is a review about the 750 watts version, and according to it, the psu was not able to deliver 750 watts. and it blew before acomplishing the last test, I bought this psu with out knowing about that review, and Only because a short circuit killed my cooler master real power 650 watts. I just spent a lot of money on this rig, I dont want to buy another psu before tracking down the problem, I am not sure, but if the psu was at fault, why the video card works fine when set to "prefer maximum performance", Either way I will swap this psu in a few weeks, I dont want to risk my hardware, thanks pal.

Maximum performance is going to cut the image quality and prefer more FPS, which leads to less GPU usage to get the same FPS. Try running something like furmark for a couple hours to see if you notice anything strange out of it.