Can VRMs affect your GPU temps

xxxlun4icexxx · Oct 10, 2018

So,

I have been monitoring my CPU temps while testing OCs and benchmarking, while I guess neglecting my GPU temp. I have a zotac GTX 1080 in my case that sits at idle at 45C with 60% fan speed. At full load it gets up to 70-75C with 80-90% fan speed.

I understand that these temps are within safe operating range, but how is this gpu so hot when it has a huge view 71 case to breathe in? 3 fans exhausting air through top radiator out of the case, 1 fan exhausting air at rear, 2 140mm fans bringing fresh air in the front.

My old NZXT phantom case with less space and cables everywhere ran this gpu way cooler, like 55-60C at full load.

I read a few posts where people hypothesized that the motherboard heat sinks were getting too hot which was raising the gpu temp. Could that be a possibility? I mean, my voltages aren't crazy, 1.37ram voltage and 1.24 vcore. Could it be that tempered glass cases just run way hotter?

gamerguy319 · Oct 10, 2018

Do you have your graphics card in the vertical GPU mount?

kanewolf · Oct 10, 2018

If you have 4 exhaust and only 2 intake, you may not have enough intake air. Take the side panel off as a test. If your temps drop significantly then you don't have enough intake volume.

scout_03 · Oct 10, 2018

did you play with gpu fans settings and did you overclock it also .

xxxlun4icexxx · Oct 10, 2018

gamerguy319 :

Nope, horizontal. pic of setup below:

Setup

The only other thing I can think of is that the 3 fans I have exhausting air on top is above the radiator, not below. But I don't have control over that because the pump is on the bottom of the radiator.

xxxlun4icexxx · Oct 10, 2018

scout_03 :

I set a more aggressive fan curve so if the fans stay at about 80-90% the gpu temp stays at 70-71C under full load. Still seems high to me. I have not overclocked the GPU, just the CPU.

scout_03 · Oct 10, 2018

name and model of this water cooler .

xxxlun4icexxx · Oct 10, 2018

scout_03 :

The cpu one? Swiftech drive x3 aio.

scout_03 · Oct 10, 2018

i would check if you could not have more powerful cfm fans in the front panel since that only the top spot you could use for cpu cooler .

xxxlun4icexxx · Oct 10, 2018

scout_03 :

Come to think of it, in my old case (the NZXT) I had pretty much the same fan setup except I had a large 240mm fan blowing air in from the side. Would that make a big difference in gpu temps? Perhaps that's why I see such a difference.

scout_03 · Oct 10, 2018

the old case had more fresh air in so gpu temp lower .

kanewolf · Oct 10, 2018

xxxlun4icexxx :

I said to test without the side panel. That will provide unlimited inflow air.

gamerguy319 · Oct 10, 2018

Try removing the glass on the front and see if that helps. the front panel on the View71 looks restrictive

t99 · Oct 10, 2018

What is the order if airflow touching what in this case?? Let's say thid case has cool air hit something higher temp first then something Lower second and so on.. this would not be efficient cooling. Ideally you want the coolest part getting hit first and the hottest last.

Now this is very rough so bear with me... say the air coming in is 60f and it hits something that is 130f first and the rest of the air warms up to 95 then hits something at 100f and doesn't really cool it.

Now let's say the 60f air hits the 100f first and the air is now 80f and hits the part that is 130 and now it moves up to 105.. I'm just estimating the air moves up half the temp distance, but you understand my point right.

Can you set a fan lower on the front? I use 3 120mm on the front vs 2 140mm.. I like this because I can cover more area and have 1 fan very low..

Someone mentioned maybe not enough intake which could be, but from my understanding this shouldn't cause much of an issue, but perhaps I am wrong. Having negative pressure should keep a case really really cool, you are constantly sucking air thru the case, now you get a ton of dust which is not good.. negative pressure could interrupt your airflow pattern as well. The pressure pulls air from the sides and everywhere which could potentially cause problems.

I like having slight negative pressure, but my case is sealed very well with glass on one side and can only enter from the front. I assume you made sure the gpu is nice and clean

xxxlun4icexxx · Oct 10, 2018

kanewolf :

I tried opening the side panel and running it like that, it didn't make a temp difference. still sitting under load at 70-72C @ 90% fan speed. Just doesn't make sense in this huge case, i think the airflow is pretty good.

The only thing i did notice was that the gpu was making a noise while the fans were at 80-90%. It basically sounded like a mechanical hard-drive running. Not sure if that may be an indicator or something...

scout_03 · Oct 11, 2018

try to find if it is not the gpu fan that does it .

xxxlun4icexxx · Oct 11, 2018

scout_03 :

Will do.

To be honest I think my cpu is literally just a toaster. I think that cooling this thing is raising the ambient temp inside my case so much that the gpu is just naturally running hot.

I could be wrong, but i have a feeling that's what it is.

scout_03 · Oct 11, 2018

cpu is in the upper part it could the overclock also that raise power level on gpu did you check that but cooling need to be improve in the case .

Can VRMs affect your GPU temps

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