The AMD Site states that a minimum of 500W power supply is required and i can manage just about that. Furthermore i wont overclock anything as is obvious from my motherboard chipset and ofcourse no crossfire ever.
With this in mind what would you guys recommend. which power supply should i choose? Going through older threads i know most of you would recommend even greater supplies 650+ but sadly it would be way over my budget.
i have exactly the same system as u but the differance is that i have an i5 2500 non k and 8 gig of ram i have a 750 watts psu and i can safely tell u that it is waaaay overkill . 550 watts will be ok as ur max power consumption is about 390 watts (6950 is power efficiant) hope that helps
If the Cooler Master GX 550 available to you is the Enhance built RS-550-ACAA-D3 rather than the Seventeam built RS-550-ACAA-E3 then it is probably the best out of those three.
The TR-700P recently received a positive review from Hardwaresecrets, so the TR-500P, if it is anything like the 700W version (which isn't necessarily the case) should be okay as well.
I think the TR2 RX 550 should be discounted as it doesn't even have Active PFC and the efficiency is only 70%, the operating temp is very low (25c) and finally it doesn't have enough PCIe connectors for a 6950.
Today, any PSU with a little voltage switch should be avoided.
IMHO Coolermaster should also be avoided. The Seventeam-built GX-650 was described as a "polished turd in a box" by HardOCP. Coolermaster also puts liar-labels on some of their PSUs, overrating them or claiming protections that they don't have (fact, not opinion; reviews at HardwareSecrets). That's dishonest, and a dishonest company does not deserve anyone's business, for any of their products.
The new models of TR2 by Thermaltake are decent, but the older ones (no Active PFC as Silvune pointed out; look for the little voltage switch) are also overrated near-junk.
Where are you shopping? Perhaps we can help you select a decent PSU from what is available.
AMD are recommending 500W units as a minimum for systems with a 6950 because partly they are covering themselves and they know that people will use units which are low quality and can't deliver the wattage they claim.