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Cooling an AMD FX8350... what is a good CPU fan when not overclocking, also using 4K monitor

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May 11, 2014 7:13:41 PM

Question:
Is a 92mm Zalman cooler a decent choice to use on AMD FX8350 with no overclocking? The Zalman is for AM3 instead of AM3+... any issue with that? I could probably squeeze a 110mm Zalman in if needed.

History:
I'm using an AMD FX8350 CPU on an ASUS M5A99FX R2 motherboard. I'm looking for a good cooling fan/heatsink. I tried the Cooler Master Hyper 212 EVO that I've seen recommended, but that unit was so large it wouldn't fit. It order to even get it mounted I had to take the fan off and mount it opposite the memory sticks, which ends up pulling air through the heatsink instead of blowing, which is not optimal. And I only had about 1/2 inch room between it and the fan on the top of the case... just all around too crowded to work with.
Then I remembered I used to use Zalman coolers with good luck and fewer crowding issues. I'm thinking of using the 92mm Zalman CNPS9500AT. I believe it will fit just fine, but it is AM3 instead of AM3+. Is there likely to be any issue with that? If that's not enough cooling I could go to a 110mm Zalman. I do a fair amount of gaming (Rust, MMOs, DayZ, but no FPS, and also video editing.). I have 4 120mm case fans in a Rosewill Challenger case, and Nvidia GeForce 770 GTX quiet single fan video card.. The thing that really boosts my heat is my 4K 50 inch Seiki monitor with a resolution of 3840x2160. I burned out a GeForce 760 before I realized I needed realtime temperature monitoring with this 4K monitor.
a b K Overclocking
a b À AMD
a c 232 à CPUs
May 11, 2014 7:19:45 PM

The Zalman cooler is OK. You need to get a cooler that will fir your case. You must have a really small case if a 212 evo didn't fit. You could also try one of the Noctua Low Profile coolers.
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a b K Overclocking
a b À AMD
a c 185 à CPUs
May 11, 2014 7:31:22 PM

the evo fans can be mounted higher on the sink with no loss of performance to get over high ram.

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May 11, 2014 9:54:09 PM

I have a Rosewill Challenger midtower case. I thought that was a common size. What size case are others around here using? Full tower? Any particular brand?

The cooler was really crowded on the motherboard too, though. Ingtar mentioned raising the fan on the heatsink. That might have allowed it to squeek in, but then I probably couldn't get the memory out without taking the fan off, as the heatsink was very close to the memory sticks. Do others here really operate in that crowded space in the case?

Update:
I thoroughly cleaned off all the old, partially dried thermal paste with isopropyl alcohol (instead of just a quick wipe and adding new paste)... from both the CPU and heat sink, then applied Artic Silver 5 to the clean, fresh surfaces, and wow did that make a difference!! It helped more that any of the "upgraded" fan/heat sinks I tried. I'm back to stock fan with only new, clean heat paste and it really helped. I'll still look into the Zalman though... dang, they're expensive for a cooler.

Now my GeForce GTX770 is what's heating up the most. Just now I played Rust at max quality in a 2560x1600 window and the CPU only got to 45deg while the GPU got to 61. The Nvidia brand, single fan unit runs really quiet but I'm not sure how cool it runs compared to dual fan models. I may have to open a new thread to ask about that one.





i7Baby said:
The Zalman cooler is OK. You need to get a cooler that will fir your case. You must have a really small case if a 212 evo didn't fit. You could also try one of the Noctua Low Profile coolers.


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a b K Overclocking
a b À AMD
a c 185 à CPUs
May 12, 2014 8:43:51 AM

those are very cool temps for a 770... nvidia employs an adaptive boost/turbo function on their 700 series gpus... this feature overclocks the gpu automatically, when the gpu power is needed and there is "thermal headroom", which means of course their gpus typically boost up to 70C-75C.

as for tight fits... I don't use large heatsink on my ram... because i don't like giving my ram a huge overclock. generally ram doesn't even need a heatsink, and will run just fine without one. Mostly those big heatsinks are strictly for "look"... so yes... if you have tall ram, it can get a little crowded in there, especially if you have an air cooler.
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May 12, 2014 9:41:50 AM

Thanks for the reply,

I use Speedfan to measure the temps of my CPU and GPU. Speedfan was reporting the 61 deg that I mentioned for the GPU. Are you saying that it's okay for the GPU to show >70deg while running games, as reported by Speedfan? I qualified where the temp came from because the way temps are measured sometimes makes a difference, from what I've read in this forum.

I was referring to the Cooler Master Hyper EVO fan and heatsink crowding and not fitting over the memory sticks, not heatsinks on the memory sticks themselves.



ingtar33 said:
those are very cool temps for a 770... nvidia employs an adaptive boost/turbo function on their 700 series gpus... this feature overclocks the gpu automatically, when the gpu power is needed and there is "thermal headroom", which means of course their gpus typically boost up to 70C-75C.

as for tight fits... I don't use large heatsink on my ram... because i don't like giving my ram a huge overclock. generally ram doesn't even need a heatsink, and will run just fine without one. Mostly those big heatsinks are strictly for "look"... so yes... if you have tall ram, it can get a little crowded in there, especially if you have an air cooler.


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a b K Overclocking
a b À AMD
a c 185 à CPUs
May 12, 2014 6:16:40 PM

yeah... <70C is pretty good for a 770... now if it was running up in the 80s or 90s it would be a bit hot.
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a b à CPUs
May 13, 2014 2:34:51 PM

What case do you have? what mobo do you have/ Is it an atx. The 92mm will not work well enough if your Gaming.
Which seem to be doing. is your ram tall ram or low profile. Probably you may have to go with the best 120mm liquid cooler you can get. Remember this is a cpu that runs at up to 4.2 GHZ. therefore it is like an overclocked cpu. From what you describe a 240mm liquid cooler will not work. The FX8350 that I recently sold Gamed @ 4.2+ Ghz flat out on Dirt 3.
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May 13, 2014 2:42:18 PM

Either way you need serious cooling to game with an Fx 8350. The 92mm coolers do not cut the mustard so to speak.
If you can afford it you might think of getting a bigger case.
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May 13, 2014 2:53:10 PM

Sorry, I reread your history and answered my questions. So tell me why you could not mount the coolermaster cooler fan
over the ram . Is your ram to Tall?
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