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MCW80 In series with an MCW60?

post #1 of 4
Thread Starter 
So I currently have an MCW60r cooling my 5850. With prices dropping, it is very tempting to pick up a second 5850. The only problem is the MCW60 has been discontinued, and its flow characteristics differ from its successor. I'm hesitant to run them in parallel since the MCW80 would have less resistance and the flow rates between the two block would differ. The question is will running these blocks in series be detrimental to my temps? My currently is:

MCP350 w/ XSPC Restop > MCR320 > Enzotech Sapphire > PA.120.3 > MCW60 > Res

So I would add the MCW80 in between the MCW60 and the res. I believe my radiators should have the thermal capacity to handle this loop. What do you guys think?
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post #2 of 4
It won't hurt much. After all we are already mixing blocks with different flow characteristics (i.e. CPU block vs GPU block etc). With those radiators you will definitely be OK.
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post #3 of 4
Serial would be fine but do not run them in parallel. Your card temps will of course differ slightly because of blocks and also because of the serial setup. I would run the best performing block right after the poorer performer in the loop in order to counter the serial effect.

But anyways the temp difference will be small enough.

/Nordar
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post #4 of 4
Thread Starter 
Quote:
Originally Posted by Averwind View Post
It won't hurt much. After all we are already mixing blocks with different flow characteristics (i.e. CPU block vs GPU block etc). With those radiators you will definitely be OK.
Yeah, but all the blocks are in series, where flow rate is equal between all blocks. If you run two blocks which are not identical in parallel there will be different flow rates through each.

Quote:
Originally Posted by Nordar View Post
Serial would be fine but do not run them in parallel. Your card temps will of course differ slightly because of blocks and also because of the serial setup. I would run the best performing block right after the poorer performer in the loop in order to counter the serial effect.
But anyways the temp difference will be small enough.
That is what I was thinking. Thanks.
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