I hope a move around of the drivers helps as there is something wrong here. A 5850 beats the 4890 pretty easily so the 6970 should destroy the 4890.
The temps do seem a bit crazy too. Are they higher than everyone else?. In fact they must be or you'd realise yours is the norm, sorry for that brain fart there.
The fan noise seems a bit OTT too, could you set up a partition and do a fresh install of the OS?. It shouldn't be ramping up the fan like that and everyone else seems to be happy with the card other than you and another person who has upgraded from the 4870 to the 6950.
I'm looking forward to seeing some progress and benches. Good luck amigo

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Well the MSI 5850 is on order and is coming tomorrow. It's been on order since before Christmas (DPD + weather) but since this BIOS swap thing has happened and people not so happy with the overclocking of the MSI 5850 I decided to go with the 6950. From the benchmarks it seems like the 5850 is a 50% upgrade to a 4870 roughly and the 6950 is about the same in some titles although a lot closer in others (25-50%).
So to buy a 5870 when the 5850 is on it's way tomorrow would be pointless I think. OCuK have told me to refuse the order so I've really got tonight to think before ordering tomorrow. If I feel the 6950 won't be worth it at 1600x1200 then I might just accept the 5850 tomorrow and buy a i5 760 quad instead of the i3 540. Choices, choices, choices. TBH it's doing my head in

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How do you feel about your card?. Also what did you upgrade from and do you feel the change since upgrading?.