- Joined
- Jan 17, 2012
- Location
- Long Island, NY
Ive been trying to figure out what to do regarding my GPU update. I plan on running a 7990 when it comes out. So with that in mind....
My DT is about 4-5 degrees C at idle and at load it goes up to about 8-9 degrees C that is with ambient air at 22C.
I currently have my 1090T, AMD 990 NB, and ram (not that it really affects anything) on my loop which has a 3x120 rad. So I know my temps are pretty much spot on. Ive roughly calculated that my heatload for my current loop is about 325w. And going by the rough idea that a 3x120 rad can support 450w of heat, all my numbers make sense. Yes?
With that said (continuing with that logic)....
If I add a 7990 to the loop, I have roughly calculated the heatload to be 215w per core (taken from a 7970) so that means in total 430w. Now I obviously need more rad. With that thinking that a 3x120 rad supports 450w that would give me 900w (total with GPU is 755w) which is a good amount of head room, but since its all one loop I think I may want more so a 4x120 will give me a total of around a 1075w of rad and give me a better DT.
With that said does my logic make sense? Am I missing anything? Etc? These are all very rough numbers because Im not to sure how to get exact heat loads for my mosfet and NB. But I believe they are fairly close. And If I do go with the 4x120 I should have enough room for some error. And granted my system wont be at 100% all the time.
I got the rad heat loads from here(Post #3): http://www.evga.com/forums/fb.ashx?m=437161
Thanks in advance!
My DT is about 4-5 degrees C at idle and at load it goes up to about 8-9 degrees C that is with ambient air at 22C.
I currently have my 1090T, AMD 990 NB, and ram (not that it really affects anything) on my loop which has a 3x120 rad. So I know my temps are pretty much spot on. Ive roughly calculated that my heatload for my current loop is about 325w. And going by the rough idea that a 3x120 rad can support 450w of heat, all my numbers make sense. Yes?
With that said (continuing with that logic)....
If I add a 7990 to the loop, I have roughly calculated the heatload to be 215w per core (taken from a 7970) so that means in total 430w. Now I obviously need more rad. With that thinking that a 3x120 rad supports 450w that would give me 900w (total with GPU is 755w) which is a good amount of head room, but since its all one loop I think I may want more so a 4x120 will give me a total of around a 1075w of rad and give me a better DT.
With that said does my logic make sense? Am I missing anything? Etc? These are all very rough numbers because Im not to sure how to get exact heat loads for my mosfet and NB. But I believe they are fairly close. And If I do go with the 4x120 I should have enough room for some error. And granted my system wont be at 100% all the time.
I got the rad heat loads from here(Post #3): http://www.evga.com/forums/fb.ashx?m=437161
Thanks in advance!