cancel
Showing results for 
Search instead for 
Did you mean: 

EXTREMELY high CPU temps with MVG - possible mobo problem?

agent009
Level 7
Hey guys,

This week I picked up a 3770K to replace my 3770 in my system which was already running a H100i. On the 3770, it seemed to work fine with a 40C idle temp and 55C temp under load (with a 73C temp while running Prime95). I'm NOT overclocking, just trying to run everything at stock settings.

Upon replacing the processor with the 3770K and booting up, I started getting idle temps of 43C while slowly creeping up to 65C+. When I ran Prime95, it quickly shot up to 100C.

Thinking I didn't reseat the H100i properly, I removed it, made sure the backplate was in the correct position, reapplied thermal paste (Arctic Silver 5, pea-sized blob in the middle), and then rebooted. Same results. I then tried reapplying the thermal compound a third and fourth time with the exact same results.

I then went to the nearest retailer and purchased another 3770K. Same results.
I then tried switching to the stock Intel cooler. Same results.

A few observations:
1) The bottom hose connected to the H100i pump was extremely warm while the top one was cool
2) Both the SP120s mounted to the radiator (in pull) were operating at full speed
3) Every single time I went to reapply the paste, I found the copper block to be extremely warm (felt after I cleaned off the old paste)
4) Ambient air in the room is 78F and I was getting these results with the side panels OFF
5) When mounted, the block was not wobbly (didn't move at all) and the retention screws were only finger tight.
6) CorsairLink says the pump is operating at 2200.
7) I also checked the temps with HWMonitor, RealTemp, and ASUS Suite and they were all showing the same behavior. I didn't run the monitors at the same time--only independently.

Any ideas? Could the mobo be defective? Here's a screenshot of HWMonitor while running Prime95:

https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-ash3/1150538_10100603989062999_604603258_o.jpg


Thanks


Hardware...
Case: Corsair 650D (side panels both removed)
Proc: i7-3770K (only drawing about 1.15V according to BIOS)
Paste: Arctic Silver 5
Mobo: Asus ROG Maximus V Gene (latest firmware, default settings)
Cooler: H100i (firmware 1.05 with SP120 Quiet Edition fans)
PSU: AX1200i
41,284 Views
44 REPLIES 44

Chino
Level 15
Welcome to the Republic of Gamers forum, agent009. Let's try something.

1. Dismount the H100i again.
2. Remove your CPU.
3. Clean off the AS5 from the CPU IHS and the CPU block with isoprophyl alcohol or with one of those fancy cleaners. Whichever you have.
4. Switch off your PSU.
5. Disconnect the power cable.
6. Remove your CMOS battery for 5 minutes.
7. Put it back into place.
8. Install your CPU.
9. Apply the AS5 with your dot/pea/bean/etc method.
10. Install your H100i tightening the screws in a criss cross pattern.
11. Reconnect your power cable.
12. Switch on your PSU.
13. Power up your system.
14. Enter the BIOS and load the optimized defaults. Save and restart.
15. Once in Windows, open HWMonitor and let your system idle for 15 mins. Then take the reading. Run P95 for another 15 mins then take the reading. Also take note of your ambient temperature.

Report back with your results.

Hello and thank you for the tips,

I followed your steps exactly and ended up receiving the exact same temperatures as originally listed. (55-65C idle, 100-105C prime95 load after 15min, 78F ambient with the a/c vent directly blowing on the hardware).

I then also tried to experiment a little (after reading some other posts on this forum). I reset the CMOS, loaded the BIOS, pressed F5 (for optimal settings), then went down and Manually set VCORE to 1.03 and DLL to 1.25. This gave me results of 40-45C Idle, 85-90C prime95 load after 15min. From my limited understanding of what happened, I'm guessing it means that I have to severely undervolt a 3770K in order for it to run within safe temps. Even setting the VCORE to 1.10 caused my prime95 temps to read 100C.

Hi

I run a watercooled i5 2500k on an MVG and my max temps in Prime 95 are low 50's with the cpu overclocked to 4.5GHz. Your temps are ridiculous so something is seriously wrong. You have followed the previous poster's sensible advice on reinstalling/resetting bios etc and that hasn't worked.

I wonder if the pump is stuck or there is a blockage. I would remove the cooler and retry with an air cooler if you have one available (if your cpu is retail you normally get a stock cooler included). If the air cooler fixes the temps you know it is your Corsair H100i that needs replacing. If not then it would seem the motherboard may have developed a fault.

Hope this helps

Mag

agent009
Level 7
Hello MagR,

As noted in the original post, I also tried placing the stock Intel cooler on the CPU and received the same thermal results. I even switched RAM modules AND tried out another 3770K. I've built at least 7 computers in the past two years and have changed/installed coolers on CPUs at least 30 times.

It also appears I can only get "acceptable" temps (ie 40C idle and 85 load) if I change the VCORE in the BIOS from Auto to a manual setting of 1.03. I guess it's a bad unit then?

EDIT: I'm not even trying to overclock this thing. I am getting these temps while pressing F5 in the BIOS and trying to run the 3770K at it's normal clock.

Thanks

agent009
Level 7
I'm running Version 1802--the latest version released.

Retired
Not applicable
is the pump working properly?

also AS5 is among the worst paste you could use today, but it shouldn't get that hot regardless.

are you using 4 pin PWM fans?

Check that water is circulating.. and that the mating is good (cpu->block)
Poor cpu mating with IHS?

But you tried 2 specimens, so that cant be the case

Note> if you get those temps, that indicate that the cpu isnt getting cooled like it should..

somewhere is a weak link..

cpu-ihs-block-water-air

Is the cpu really that hot, or is the sensor telling it is?

Touch the cpu socket bracket, when you got a 100c reading, and judge..

By experience, i happen to know that if the cpu is 100c, the h100 pump-house is really warm..

if you planning of re-seating the cooler again, please take pics and show us the whole process..

i hope i gave you some new angles..

agent009
Level 7
WhitePaw thanks for the response,

I believe the H100i pump is working properly since I think I can feel a vibration/liquid flow if I hold onto one of the hoses. When the readout is at 100C+, the hose feels like the liquid inside is very hot as well. The whole CPU area also feels like it's giving off a lot of heat. Also, whenever I shut down the computer after it immediately hitting 105C and then quickly removing the H100i block (and wiping off the paste), the copper plating feels hot as well.

I also switched in a stock Intel cooler (and have been using that only for the latest troubleshooting) with the exact same results. I'd like to say I'm 97% certain I've mounted whichever heat sink correctly every time I tried to. I've built 7 computers and swapped heatsinks/blocks probably 30 times in my 2.5yrs of being into computers without any problems.

Praz
Level 13
I'd be contacting Corsair and getting help with why the H100i is providing no better cooling than the Intel stock cooler. Also with proper flow neither hose should feel hot.