GPU and CPU idling at 49C and 45-48C respectively

[merphal]

Hey guys, I recently switched my case from a Corsair Obsidian 650D to an H440. I have the 3 front fans pushing air into the system, the rear fan pulling air out and the top two fans on my H100i pulling air outside too.

The thing is, ever since I switched cases my GPU has been idling at 49C (compared to 37ish before).

The same thing has happened with my CPU, it's been idling at 45-48C ever since I made the switch.

Does anyone have any idea what could be causing this and how I can fix it?

Specs:

i5 3570k (not OC'd)
16GB DDR3 RAM @1600MHz
Maximus V Formula mobo
GTX 780 6GB GDDR5 VRAM
2x Corsair Forge GT 120GB SSDs in RAID0
1TB Western Digital HDD

I've been using HW Monitor, Corsair Link and EVGA Precision X 16 to monitor temps.

 

[MarkW]

What does your BIOS say the temps are?

Those two top fans are sucking most of that cool air right out the top. Disconnect those and see what changes.

 

[Hello man]

Hey guys, I recently switched my case from a Corsair Obsidian 650D to an H440. I have the 3 front fans pushing air into the system, the rear fan pulling air out and the top two fans on my H100i pulling air outside too.

The thing is, ever since I switched cases my GPU has been idling at 49C (compared to 37ish before).

The same thing has happened with my CPU, it's been idling at 45-48C ever since I made the switch.

Does anyone have any idea what could be causing this and how I can fix it?

Specs:

i5 3570k (not OC'd)
16GB DDR3 RAM @1600MHz
Maximus V Formula mobo
GTX 780 6GB GDDR5 VRAM
2x Corsair Forge GT 120GB SSDs in RAID0
1TB Western Digital HDD

I've been using HW Monitor, Corsair Link and EVGA Precision X 16 to monitor temps.

Did you re-apply thermal paste???? You definitely should. Wipe the old junk off and get some solid stuff like Arctic Silver or EK stuff. Now- are you reading individual core temps, or the socket temp? The H440 is also a "silence" optimized case, and therefore suffers from common symptoms such as decreased airflow and higher temperatures. I mean this is a pretty simple study-just look at the tiny vents the fans pull air through!! You could probably see better temps with Phanteks static pressure optimized fans.

 

[atheus]

Your graphics card may have a fan that remains off while the GPU is idle, which often means surprisingly high idle temps for the GPU. Regarding your CPU, you may want to confirm that your pump is running at a reasonable speed while the CPU is idle. If your pump is getting attenuated down to very little water flow, that could easily result in high CPU idle temps.

Remember with air cooling, the heat pipes do the same job that the water pipes do in water cooling, but there is no "flow rate" in a heat pipe, so the same amount of heat is transferred to the fins (radiator) whether the CPU is idle or fast. With water cooling, that heat transfer rate is variable with the pump speed, so you get an exponential effect from turning both your pump and radiator fans down.

If your load temps are fine, but your idle temps are too high, this is most likely the case. If your load temps are high as well, then as Hello man suggested, check your thermal paste, or for some sort of equipment failure.

 

[Hello man]

Your graphics card may have a fan that remains off while the GPU is idle, which often means surprisingly high idle temps for the GPU. Regarding your CPU, you may want to confirm that your pump is running at a reasonable speed while the CPU is idle. If your pump is getting attenuated down to very little water flow, that could easily result in high CPU idle temps.

Remember with air cooling, the heat pipes do the same job that the water pipes do in water cooling, but there is no "flow rate" in a heat pipe, so the same amount of heat is transferred to the fins (radiator) whether the CPU is idle or fast. With water cooling, that heat transfer rate is variable with the pump speed, so you get an exponential effect from turning both your pump and radiator fans down.

If your load temps are fine, but your idle temps are too high, this is most likely the case. If your load temps are high as well, then as Hello man suggested, check your thermal paste, or for some sort of equipment failure.

If we want to get technical, there kind of is a "flow rate" in a heat pipe, I.E. the flowing of vapor up the pipe, condensing, and traveling back down the wick material. Doesn't really matter though, here is no way to control that. Just check in Corsair Link that the pump is at a normal speed. I have a pretty loud pump in my rig, (MCP35X) which I have set to run on a deliberately silent fan curve.