Games crash if pc restarted after driver installation...

Can we have a list of specs please and include the power supply please as this is where i suspect the problem lies.

Mactronix

Well a GPU will draw pretty much peak load when starting up and the 275 draws about 140 Watts so i would think thats it. Given that its 12v rails are pretty weak by todays standards and the older it gets the weaker it gets teamed with two HDD's and is that an OC on the CPU i see as well ?
I had a card do similar to me, that was down to drivers though rolled back drivers and it was fine, hadnt updated the card just drivers.

Mactronix

Well I think whats happening is that when the card is installed and you start the PC back up its got no Drivers to tell the GPU to spin up the fan etc and its also possable the boot sequence dosent even involve the GPU at this point, I mean sure it powers it but not at the same time or to the same profile as when the drivers are installed.
So when you install the drivers and re start the PC the driver will run a differant more demanding start up profile which your PSU cant quite live with.

Mactronix

if i understood well what you said, the gpu runs at a different profile before the reboot of the system...but, when i install the drivers i dont uninstall them first, i just run the installation again...isn t the gpu running the same profile? also,from EVGA's precision i can see that the core,shader,memory etc reach their top frequencies (ie 633 MHz for the core) when i play a game... and how do you suggest i check if it s a psu issue? unplug a hard drive or the dvd-rw?

ps. excuse me for my english they re not my native language

Try a different driver.

I read where it's 16 and 17 amps on each of the two rails..?. If by blind luck you can get 1 molex connector from each "rail' plugged into the "Y" splitter you might have a slim chance of it working right. HAHA on that.

Way too many people say AHAH!.... 550 watt PSU. Enough to power the world when in reality you should be looking at AMPs....... like enough to run what you have and then some. Think about buying a power supply with around 40 to 50AMPS on a "single" rail and you'll be on your way.

Forgot to mention. Quite a few people have problems running the new Nvidia drivers that are Windows7 compatible. Try running an earlier version.

Looking here
OUTPUT
+3.3V +5V +12V1 +12V2 -12V +5VSB
Max. Load 30A 28A 14A 15A 0.3A 2.0A
Min. Load 0.5A 0.3A 1.0A 1.0A 0.0A 0.0A
Peak load 16A 2.5A
Load Reg. +5% ~ -5% +5% ~ -5% +5% ~ -5% +5% ~ -5% +10% ~ -10% +5% ~ -5%
Ripple
V(p-p) 50mV 50mV 100mV 100mV 100mV 50 mV



The max load is only 28 amps, which is fine for running a 4850 or a G250, but a 260 is pulling too much power. Having only 15 amps on 1 rail and 14 on the other, its not enough, and your psu is straining to work, and the shutdowns will only get worse