PCI-E Power

[iliani007]

Hey guys ,
I have an old Dell optiplex GX620 Small Form Factory.
It has a PCI-E x16 2.0 , and a HD 4350 installed on it about 23W
Now my question is :
My PCI-E is 75W or 25W because in dell Website is 25W ,,but there are parts upgrades that pass the limit like a hd5570 45W
I saw my BIOS and readed 'PEG' (PCI Express Graphics) ,,what does this mean?

I want to upgrade the hd4350 to a gt430 or a hd5570 . Is this possible?
WIKIPEDIA:

PCI Express cards are allowed a maximum power consumption of 25 W (×1: 10 W for power-up). Low profile cards are limited to 10 W (×16 to 25 W). PCI Express Graphics 1.0 (PEG) cards may increase power (from slot) to 75 W after configuration (3.3 V/3 A + 12 V/5.5 A).[9] Optional connectors add 75 W (6-pin) and/or 150 W (8-pin) power for up to 525 W total (75 W + 3×150 W).[10]



IS THE LIMIT 25W?

 

[C12Friedman]

You should be able to run a GT430, the lane will handle 75W as you've found. Dell's statement of 25W (I believe) is stating the usage of the installed hardware and not a limit to the slot. I will recommend to check that your PSU provides at least 300W if considering the upgrade