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HX650 can handle HD 6950 CF, provided you are not doing much overclocking. HX series can be considered as modular TX series. Asingh is using his TX650 along with 2 HD 4890 in CF which draw significant more power than today's GPUs. He is also using it with quad core Q9550.i5 is really fast in daily to daily task, unbeatable performance
BTW which PSU will be more suitable for HD 6950 CF ? Corsair TX 850v2? My friend is gonna buy another HD 6950, but the prob is that he has HX 650. So, can it handle HD 6950 CF or should he change the PSU & get a new one ?
Extreme Gamer, I think I don't need to answer regarding your HD 6850 CF benchmark as a lot of forum members already answered that.
And one thing, GTX 580 is available around $500 is US, it is far cheaper than India, but so do the other graphics cards like HD 6870 or HD 6950.
A standard HD 6870 will cost you around $185 and the seriously factory overclocked versions are within $210-$220. Consider the HIS ICEQ X turbo HD 6870 @ $214 offers performance similar to the HD 6950 or GTX 560 stock. Check the review in gurur3d. So even in USA, at a sub $400 budget you can again beat a $500 card. Actually the CF/SLi scenario is valid everywhere, irrespective of pricing.