They seem to be the only water cooling blocks for the 7950GX2, and they are supposed to be on the EVGA Black Pearl, which is nothing more than a regular card with water blocks.
My beef with it is that the Germans/Danish (Koolance, Asetek) like to use tiny puny tubes. The ID on these Innovateks is 5/16 inches or 8 mm. Its barely more than a 1/4 inch. In contrast, the French (swiftech)/US (danger den) way is to go BIG bore, with 1/2 inch ID.
The Germans seem to believe that slow water flow is better than high water flow. Don't understand why.
If I buy these, this means that I might as well buy all my other Conroe stuff from Innovatek. Otherwise, my 1/2 inch big bore American water cooling will be restricted like no tomorrow by these Innovatek blocks.
Why oh why can't Danger Den manufacture something like this? Pity
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Smaller tubes don't necessarily mean slower flow...it'll mean less flow, but the velocity of the water could conceivably be the same...although I do agree that more flow produced by bigger tubes does the job better.
I think they think along the lines of the workability of having the tubing going to and from cards...bigger bore tubes aren't as flexible, and are qite difficult to cram into a smaller space, particularly if there are 2 GFX cards. Also, the water blocks for gfx cards are smaller, and the gain from bigger tubing wouldn't be as large as a result.
--If you want something said, ask a Politician. If you want something done, ask an Engineer.--
The EVGA Black Pearl is crap. Who wants pre-installed water cooling blocks at a rip-off price when you can get the cheaper one and install the waterblock yourself, and then you got an extra fan if you ever want to go back to air cooling in the future.
I don't think the problem is speed of flow when it comes to ID. The problem is the amount of water in a given area (such as the area within the CPU waterblock) that is available to carry heat. More water will result in less temperature rise which will give your radiators a lower temperature to try and handle. With a larger ID, it will be easier for your system to stay cooler, provided that the pump can handle pushing it, (which it most likely can).
Cooling these cards will allways have hit factor on flow as how they are designed. Id definatly run 2 loops on these cards as Doddsy said.
Mainly as it will really kill flow, i mean i still use the Maize4 as they are low restricted blocks. This means i can run them on all one pump with my CPU also. It will be harder to get the max from thge CPU and Cards if all on one loop IMO
Id run a DDC Ultra + Radical or Laing Top for the Cards and another pump for the CPU/Chipset.
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