$900? wtf i hope it can be locked to 2ghz...
For someone who has a cooling radiator/system already, these should be very tempting... if you have the money obviously.
These are not double-wide and take only 1 slot... You can fit ALOT of these on some motherboards.
They will run in low temps and will be quiet. You can OC the crap outta them in this config I think...
Would like to hear from anyone who has something like this with these 6990s already going...
I cant help you with 6990 water info, but I have 2 5970's watercooled using the razor 5970 waterblocks, 50mm triple radiator with 3
http://www.scan.co.uk/products/120mm-silverstone-fm121-%28white%29-dual-ball-bearing-case-fan-plus-2400rpm-pro-use-hi-end I run them at 964mhz @ 1187mV getting 1.6gh over both temps are 40c~45c cores and 70's on the vrms
I also have a single 6990 with stock cooler (much better designed and cooler than stock 5970), 6990 hits 890mhz and temps stay in the 70's pretty easy, and gets 0.78gh, never really tried to push it higher. I don't think the 6990's need water as much as the 5970's.