Originally Posted by BramSLI1
You're wrong about that. The last system had a dual 7970 graphics set up. There were four systems on the main display table and the fourth one had the H220 cooling the CPU, dual GTX 680s in SLI and the chipset. I know it sounds crazy, but this AIO liquid cooling kit can handle it.
Sorry I wasn't clear, I was trying to answer the CPU + SLI GPU Loaded at the same time question and thought the poster was referring to system 5 "At the end" which I noted in my response. I thought sys4 and 5 both were running 680s and missed the 7970s were running on the last system.Perhaps I missed it?, but was system 4 loading GPU also??
I heard that burn test was being used, but I didn't hear anything about a GPU benchmark running concurrently.
Regardless, I was trying to figure it out using C/W and heat loads and cobbled together the following:
At 1200RPM an MCR220 has about a .095C/W
Assuming a 130W processor and two 195W video cards can add to upwards of 500W. Even if you reduce that to 80%, it's still a massive 400W worth of heat. Granted there isn't much data on "REAL LIFE HEAT LOADS", so going off a guess here and assuming 80% of max is a good guess.
400W * .095C/W = 38C, that is really way too high, you would definitely need higher fan speed..
At 2000RPM however the C/W gets much better at a .035C/W, 400W * .035C/W = 14C (still too high for my liking)
The kit fans run up to 1800RPM, so the C/W value must be between the .035 and .095. The change is .06C/W over 800RPM or .0075C/W per 100RPM. To estimate the 1800RPM I will take the .035C/W value and add .0075C/W x 2 or a C/W = .05
Now back to the assumed 400W heat load.
400W x .05C/W = 20C.
To get a 10C delta (which I would consider a good average), I would think you need to add one more MCR220QP and use full 1800RPM speeds which is more in line with the system 5 setup which is what I would do..
Actually I like a quad rad per component (Silence and a 5C water delta), but that gets tough keeping INSIDE a case..Edited by Martinm210 - 1/25/13 at 8:02pm