The biggest affect on CPU temp with GPU combo loops will be the added heat into the loop. The difference due to flow rate is minimal in comparison.
An example might be your flow rate was reduced from 1.5 to 1.0 gpm. If you were using the CPU fuzion, here is the published thermal performance difference:
So 1.5gpm to 1.0 GPM The C/W difference is .003 @ 100 watts is .3C
Even if you dropped down from 1.5 to .8 GPM the C/W difference is .006 or .6C.
It's pretty hard to get below .8 GPM, so this is a good example to show you how some blocks do very well even at low flow rates like the Fuzion.
This doesn't account for some loss you get in your radiator, but as long as you have plenty of capacity there, that won't amount to a whole bunch either.
So combining GPU and CPU might raise your CPU temps by several degrees, but most of that is going to be due to the added heat which you'll get regardless of which block you choose.
Bookmarks