A question about vrm mosfet temps

stoggs1 · Mar 25, 2017

Hey guys, so I have finally completed my build after asking a bajillion questions lol, well anyways I was wondering what are the max safe temps for the mosfets on the vrms?

According to hardware info 64 if I was reading correctly mine where running at 71 degrees c after running prime 95 for about ten minutes.

I went to microcenter and bought some heatsinks and applied them and I have attached before and after pictures with and without the heatsinks.

The motherboard im using is an msi 970 43g and the cpu is the fx 8320 and I want to overclock it to 4 ghz hence the cooler I bought but i don't want to burn up the vrms and destroy the board.

Vya Domus · Mar 25, 2017

That board has a 4+1 phase VRM , I would NOT overclock any 8 core chip with it.

stoggs1 · Mar 25, 2017

Ok so no ocing at all, well should I have any problems with it running stock? And for some reason the pics didn't upload correctly.

Vya Domus · Mar 25, 2017

stoggs1 said:
Ok so no ocing at all, well should I have any problems with it running stock? And for some reason the pics didn't upload correctly.

I generally recommend these kinds of boards for anything up to a 6 core FX. But if you haven't encountered any throttling by now , I'm guessing it's going to be OK . If you have installed those heatsinks make sure you have proper airflow in the case and you should be fine.

stoggs1 · Mar 25, 2017

I have 5 case fans, i have done some gaming and haven't had any issues so far. Now what is the max safe temps for the vrms? I wish I was home so I could upload them, I am not sure if I was looking at the temps for the vrms correctly on hwinfo.

And what other temp monitoring software would you recommend? I also have speedfan but im also not sure how to read the vrm temps on there as well only cpu and gpu.

uuuaaaaaa · Mar 25, 2017

stoggs1 said:
I have 5 case fans, i have done some gaming and haven't had any issues so far. Now what is the max safe temps for the vrms? I wish I was home so I could upload them, I am not sure if I was looking at the temps for the vrms correctly on hwinfo.

And what other temp monitoring software would you recommend? I also have speedfan but im also not sure how to read the vrm temps on there as well only cpu and gpu.

Take a look at HWiNFO64

Vya Domus · Mar 25, 2017

stoggs1 said:
I have 5 case fans, i have done some gaming and haven't had any issues so far. Now what is the max safe temps for the vrms? I wish I was home so I could upload them, I am not sure if I was looking at the temps for the vrms correctly on hwinfo.

And what other temp monitoring software would you recommend? I also have speedfan but im also not sure how to read the vrm temps on there as well only cpu and gpu.

Most VRM's can reach temperatures of 100C+ , however this doesn't tell you anything since they can pop with just a little variation on that temperature limit. By the way are you sure that 71C reading isn't the CPU/socket temperature , I kind of have doubts that board can tell you VRMs temp.

Caring1 · Mar 25, 2017

The only accurate way to tell temps is a thermal imaging gun, or infrared thermometer.

uuuaaaaaa · Mar 25, 2017

Caring1 said:
The only accurate way to tell temps is a thermal imaging gun, or infrared thermometer.

I beg to differ, those need to be calibrated on a surface basis due to emissivity differences. K type Thermocouples and PT100 RTD's are the way to go regarding accurate temperature acquisition.

Caring1 · Mar 25, 2017

uuuaaaaaa said:
I beg to differ, those need to be calibrated on a surface basis due to emissivity differences. K type Thermocouples and PT100 RTD's are the way to go regarding accurate temperature acquisition.

K, I'll rephrase that and add, "cheap way".

stoggs1 · Mar 25, 2017

Vya Domus said:
Most VRM's can reach temperatures of 100C+ , however this doesn't tell you anything since they can pop with just a little variation on that temperature limit. By the way are you sure that 71C reading isn't the CPU/socket temperature , I kind of have doubts that board can tell you VRMs temp.

According to speedfan and hwinfo cpu was in the mid 50s under full load running prime 95 and low 50's when gaming I bought an aftermarket cooler the cooler master hyper t4 and im using artic silver 5 paste so my cpu seems to be good.

uuuaaaaaa · Mar 25, 2017

Caring1 said:
K, I'll rephrase that and add, "cheap way".

Those Flir android thermal imaging cameras will cost you way more than a digital multimeter with k type thermocouple reading capabilities (a thermocouple will cost you $10), if you want to go insane you can get a thermocouple datalogger with something like 8 thermocouple inputs + PT100 RTD inputs and pc conenction capabilities for a similar price of those flir android devices. Thermal imaging is good to get flashy pictures and a representation of the temperature distribution, if the emissivity of the surface is constant (which is not true for most pc components). A infrared thermometer is usually a waste of money. Sorry if I sound like I'm raging, but I work with this kind of things and I cant stand how people are fooled by those crappy thermal imaging devices.

EarthDog · Mar 25, 2017

Pictures are not working for me...........zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

eidairaman1 · Mar 25, 2017

Calling @Mr.Scott,

For your board see if you can direct fan the vrm circuitry. That's the only caveat is temps with that phase level.

stoggs1 · Mar 25, 2017

EarthDog said:
Pictures are not working for me...........zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

I tried uploading on my phone from imageshack, I will re upload later when I have a chance.

stoggs1 · Mar 25, 2017

eidairaman1 said:
Calling @Mr.Scott,

For your board see if you can direct fan the vrm circuitry. That's the only caveat is temps with that phase level.

I may try that, I have ram fan from my workstation pc I may try to rig it on the vrm on my new system.

EarthDog · Mar 26, 2017

Upload them here bud....don't do 3rd party..

stoggs1 · Mar 26, 2017

EarthDog said:
Upload them here bud....don't do 3rd party..

How do you do that? Whenever i try to upload a picture the forum ask for an url.

EarthDog · Mar 26, 2017

Click UPLOAD A FILE, and choose the location...

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Case	Phanteks NV7
Power Supply	GPS-750C

Processor	Ryzen 5 5600
Motherboard	Asus b450F ROG Strix
Cooling	3 case fans plus deepcool maxx V2 cpu heatsink
Memory	16 GB Crucial Ballistix DDR4
Video Card(s)	Zotac RTX 3060 TI
Storage	3 SSD's, 1 Samsung 970 Evo NVME and 2 sata (Crucial 1 TB and ADATA 480 GB) and 2 sata hardrives
Display(s)	27 inch Asus 75hz gaming monitor
Case	NZXT h500i black
Power Supply	Corsair cx650m 650 watt psu
Mouse	Corsair M65 Pro RGB
Keyboard	Inland RGB mechanical keyboard with blue optical switches.
Software	windows 10 64 bit

System Name	Good enough
Processor	AMD Ryzen R9 7900 - Alphacool Eisblock XPX Aurora Edge
Motherboard	ASRock B650 Pro RS
Cooling	2x 360mm NexXxoS ST30 X-Flow, 1x 360mm NexXxoS ST30, 1x 240mm NexXxoS ST30
Memory	32GB - FURY Beast RGB 5600 Mhz
Video Card(s)	Sapphire RX 7900 XT - Alphacool Eisblock Aurora
Storage	1x Kingston KC3000 1TB 1x Kingston A2000 1TB, 1x Samsung 850 EVO 250GB , 1x Samsung 860 EVO 500GB
Display(s)	LG UltraGear 32GN650-B + 4K Samsung TV
Case	Phanteks NV7
Power Supply	GPS-750C

Processor	Ryzen 5 5600
Motherboard	Asus b450F ROG Strix
Cooling	3 case fans plus deepcool maxx V2 cpu heatsink
Memory	16 GB Crucial Ballistix DDR4
Video Card(s)	Zotac RTX 3060 TI
Storage	3 SSD's, 1 Samsung 970 Evo NVME and 2 sata (Crucial 1 TB and ADATA 480 GB) and 2 sata hardrives
Display(s)	27 inch Asus 75hz gaming monitor
Case	NZXT h500i black
Power Supply	Corsair cx650m 650 watt psu
Mouse	Corsair M65 Pro RGB
Keyboard	Inland RGB mechanical keyboard with blue optical switches.
Software	windows 10 64 bit

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Power Supply	Seasonic 1250 XM2 Series (XP3)
Mouse	Roccat Kone XTD
Keyboard	Roccat Ryos MK Pro
Software	Windows 7 Pro 64

A question about vrm mosfet temps

The Exiled Airman