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I scanned this thread and didn't see any mention, so, Tom's Hardware states the Accelero Xtreme III will fit the 290 with minor tweaking, a guide coming soon.
http://www.tomshardware.com/reviews/radeon-r9-290-review-benchmark,3659-19.html
So, with the MK26, that's at least two options for those who don't mind open air coolers.
Hi
Would a XFX PRO850W Core Edition Power Supply be able to run 2 290s and this
i7 3770k 4.2
thermaltake water 2.0
2 hard drives
16gb ram
4 120mm fans
2 80mm fans?
On review sites It says It can go over 900w
So basically to sum it up:
Pros
£65 cheaper than GTX780
Slight performance advantage out of the box
More overclocking headroom (especially with an aftermarket cooler and a BIOS flash)
Cons
Noise
Heat
R290 non X + aftermarket cooler does cost more than a Windforce GTX780 (but the R290 non X will OC more).
All in all I think it's a great bargain if you can live/cope with the sacrifices made to hit the price point.
You can get an Accelero Extreme III for £50.00. This will also cancel the noise and heat issues.
So no cons really![]()
Also its £70 cheaper than the cheapest 780 on ocuk.![]()