Zalman Reserator V1

it was designed to cool the extreme edition of the the prescott chips, with a gpu and nb in the loop - remember how hot they were?

I seen then used for SLI's 8800gtx's and that's uses more juice that a 4850x2.
The pump on the Res1 wasn't great (but fine with high flow blocks)
and the inc blocks are rubish by todays standards
but you'll need a full cover block with a duel gpu card anyway.

most people rubish the reserators, they are not minimum temp watercooling.
And usually give temps around stock cooling levels, unless like me you heavily tweek them.
BUT they cool with no fans and no noise.

A res1 will not cool a Q6600 and a 4850x2 at load - that's asking to much
 
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I had a 4850 + an overclocked e5200 on mine (plus a small overclock on a AMD64x2 4200+ /w 4850 prior to that). The rad became a touch too hot to keep bare skin against, but worked. It struggles on a single high tdp chip such as my q6600 due to either cpu block ineficiency, or more likely the low power pump. But doing two things in series, you will max out the rad instead. The fan attachment and pump upgrade could improve its performance.

I'd guestimate the above dual core cpu's to be putting out slightly more TDP than the stock 4850 [of the 110W rating, lots came off the voltage reg chips - got well toasty - and the ram uses some].

I'd rekon it ought to take two 4850s if you get a 2nd r1v2 gpu block. The r1v1 gpu blocks are a waste of space and will not do a 4850 chip.

Mine is soon to be shifted from the q6600 (struggles with the poor vid chip a lot) to my 5850 which might be too much for the gpu block/pump. We shall see. Together, they would be too much for the rad, as stated by the above poster.
 
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