Mateusz_Zboj wrote:Can't i just limit the 450 slightly to get below the 75W or does it not work that way?
Well I was in a rush this morning and wasn't thinking that hard, you can use a molex to 6pin adapter, my initial reservation was that most psus that don't have a 6pin cable are usually quite dodgy. Assuming your powersupply ratings aren't inflated, it has a 15A and 14A 12V rails, probably at least 20A combined in theory, that'd be comfortable enough theoretically for a stock gts450 (105W), e6700 (65W) and motherboard and standard peripherals (HDD & other minor internal accessories maybe 20W total, motherboard shouldn't be more than about 30W? maybe more on those older ones they had a busier northbridge back then).
If it crashes you can downvolt and downclock it using gpu overclocking software such as MSI afterburner until it draws little enough power not to crash during high loads like games. Remember that downclocking in and of itself doesn't decrease the power draw (noticably), the downvolting does, you downclock because a lower voltage requires the lower clock to be stable.