For me the titles suggest I'm working on a 3rd Party solution for the Reference R9 290X and relating the Cost Vs Experience I have with the product.
If you read my Arctic Accelero R9 290X-Xtreme thread, with the help of other members, you learn how to mount the Accelero III and how it performs. I concluded, from an enthusiasts point, it's a useless solution for the 290/X and abandoned the thread saying it was OK for the average user whom wants a QUIET card but don't expect to clock any higher then 1130/1200 with +100mV with VRM temps over 100C and Tom's Hardware review was very misleading. You can clock the card higher with the noisy Reference Cooler, say 1195/1500 with Higher GPU Temps but considerably lower VRM Temps.
Sorry your confused but very pleased with your interest. We already have a very interesting argument in regards to a challenge between the XSPC Vs EK-FC WB designs for the R9 290/X. We are still waiting a concise OPEN Top view of the EK-FC WB for the R9 290/X that show how the design Actively Cooles the Rear VRM's - Anybody?
I'm once again waiting parts to build a "3rd Party" XSPC Razor R9 290X WB solution and report on the build and eventually post results.
Now that I've informed you, stay in tuned and from my experience learn the ins and outs on how to build the XSPC Razor R9 290X looking at the cost and how well it performs.
I've had the Reference R9 290X clocked to 1300/1600 Mhz at +156mV for short periods with the stock cooler and expect a continious 1325/1600 Mhz with the XSPC Razor R9 290X solution with temps well under 70c for both the GPU and vRam at Full load with NO THROTTLING.
Total cost for the XSPC Razor R9 290X so far has been $549 for the card + $134 for the Razor WB with Backplate + $70 for a 280x30x140mm Rad + $170 for a Koolance 401x2 and PMP-400 Pump plus another $45 for Barbs, Hose and Coolant.
Total adds up to $968. Now add another 15% for Ontario's 13% HST Tax + Shipping equals about $1,113 CDN - Believe me for this money, if I can't smash any of nVidia's single card offering's you will hear it from me 1st. About the only way to recoup the cost is do some Bitcoin mining and if that looks lucrative I just might buy another Ref R9 290X with a Razor WB, another Pump and Rad to Loop each card on it's own ;o)
The AMD Reference R9 290X is a Powerful Brute. It's not hard to cool the GPU but the VRM, due to it's location on the card, is very precarious to cool and if you can't cool the VRM's the card it will continue to throttle and defeat your Over-Clock.
The Best Unigine Valley Bench, with CPU idling at 1600Mhz, is a 2976 Score - Not too shabby at 1170/1500 Mhz with +100mV using the Reference Cooler. Pushing it harder does not improve the score due to throttling and the Arctic Accelero Extreme III solution does not even come close to that.