EXTREMELY high CPU temps with MVG - possible mobo problem?

[agent009]

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

[agent009]

I just tried flashing 1802, 1701, and 1604 using both FAT32 and NTFS formatted stick. No temperature improvements.

Yes, this is the second 3770K I've tried on this.

I guess the only other steps to take would be:
1) Try ANOTHER 3770K
2) Try this current 3770K in an LGA 1155 HP OEM motherboard
3) Try an HP desktop's 3770 (non-K) in the current MVG
4) Get a replacement MVG
5) Replace the AX1200i (only 6 weeks old)

Thanks for the help. This is starting to frustrate me.

[agent009]

Alright,

So I'm starting to think it's not the CPU, but the Maximus V Gene that's the problem. I decided to head to the office and take apart an HP desktop with a regular 3770-nonK. It appears the temperature of the 3770-nonK runs a maybe 5 degrees on average cooler than the 3770K.

Here are my temperature results with the processors switched between the two:

Pegatron IPMMB-FM (Formosa) with 3770K IDLE: LINK
Pegatron IPMMB-FM (Formosa) with 3770K LOAD: LINK

The Formosa motherboard's idle and load temps are the same as above even with the 3770-nonK installed


Maximus V GENE with 3770-nonK IDLE: LINK --(forgot to reset MAX reading in HWMonitor. Look at RealTemp instead)
Maximus V GENE with 3770-nonK LOAD: LINK

As you can see, the MVG seems to overheat both processors equally. The Formosa board keeps the temperatures within limits. Weird huh?

[HiVizMan]

RMA your board and get one that works as they are meant to.

[Arne_Saknussemm]

Good that you had the opportunity to try that....yes definitely board...something not right...has to go back.....seems like you have had a strange case of double trouble....with cooler and Board!!

Hope things get sorted quick....

[Peacetilence]

I just installed a H100i on my M5G and I had to add some plastic washers betw. the board and the back bracket, else the block wouldn't sit tight on the CPU. My guess is that Corsair is aware of the problem (so is ASUS btw. My Impact came with a set of washers for exactly this purpose !) and sent you a "fixed" version.