H100 New build pc - cpu overtemp

Cabbages2011 · 15 Jan 2012 at 13:12

I`ve just finished assembly of my new PC build using the Corsair H100 - on startup its saying `CPU over temperature error` and going into bios it`s showing 70-80 degrees C. This is just from very first power up no overclocking profiles applied..

At first i had the dual h100 fans plugged into the pump/cpu-unit as per the instructions - but they would spin and after a moment stop and cpu overtemp and cpu fan errors would throw..

So i plugged the two fans into the CPU FAN and CPU OPT FAN headers on the motherboard. That seemed to keep them running, but yet again i got the cpu over temperature error..

I`m not sure if the H100 unit is faulty, not seated correctly, or what. The light is coming on it, but i can`t feel any vibration from it although one pipe is cold and one is hot - ?

Also very worried about damaging the 3930K as it`s expensive to replace..

Cabbages2011 · 15 Jan 2012 at 14:41

Thanks for the help guys..

It`s really wierd, what i`ve done is after some research held the button on the cooler for a few secs to reset it, then tried plugging the h100 fans back into the unit ( rather than the mobo headers ), and everything seems to be miraculously working :/

The cpu temp in the bios is saying up to 25 degrees C now is that about right for startup temps?

Next problem i`m having is the MSi GTX560Ti driver software is saying it can`t find compatible hardware..

Not sure if this is an X79/2011 issue.. time to do some googling. It`s also not recognising my belkin wireless dongle which is a pain..

Final issue i`m having is it`s only saying 24/25 gig ram instead of the full 32 gig

Full specs are:

i7 3930K
Corsair H100 Cooler
Asus P9X79 Pro Mobo
32Gb Gskill RipjawZ 1866 Ram
Corsair TX650 PSU (non-modular)
Corsair Obsidian 650D Case
MSi GTX560Ti TwinFrozrII OC

Any help much appreciated this is my first self-build..

Cabbages2011 · 15 Jan 2012 at 14:54

Jay794 said:
Doing that defeats the point of being able to change the fan speed, the fans need to be plugged into itself for it to work properly

What i meant was -

Standard H100 installation, you plug its fan plugs into the H100, and then the unit has a seperate plug which goes into the Mobo CPU Fan header..

This didn`t work for me and i had to plug the H100 fans directly into the CPU Fan and CPU Opt headers.. ie so the mobo was controlling them not the H100..

But as i say it overheat anyway and through some miracle got it working by reverting to original setup and resetting the h100 by holding down the button..

Cabbages2011 · 15 Jan 2012 at 15:45

Got the drivers installed for the GTX560Ti..

Trying to figure out why it`s only showing 24Gb ram instead of 32..

Cabbages2011 · 15 Jan 2012 at 16:10

pgi947 said:
Found this on the asus forum, might be worth trying some of the mentioned solutions: http://rog.asus.com/forum/showthrea...4gb-at-1600-mhz-but-32gb-at-1333mhz-WTH/page2

Thanks for the link!

Hyburnate said:
Have you fixed the issue with the H100? It could be you left the sticker on the back?

There was a plastic cover over it but was removed so just the thermal paste on

If 25 degrees c is ok for startup cpu temp then yeh it`s fixed..

Davefran said:
Are you running the correct version of Windows 7

Thanks Davefran but yeh it`s Win7 Pro 64Bit..

I`ve just had a look at the DRAM SPD Information thing in the Asus bios, and it says sticks C1 + C2 are `Abnormal` - all other sticks coming up ok.. So i`m guessing either 2 bad sticks, bad mobo, or need to mess with bios config to get them recognised :/ Clueless about the bios tbh..

Cabbages2011 · 15 Jan 2012 at 17:58

Jay794 said:
....you sure?

The only cable I have coming off the H100 (other than the 2 fan cables) is plugged into the PSU....not the motherboard

Yep it sticks out of the top of the main cpu part of the H100 as seen here ( the cable splits at the end into a molex for the psu and the pin for the cpu fan header:

The little pins actually pushed out of the plastic protector/cover on the molex when trying to connect it to the psu plug, what i had to do was just plug the two bare pins in to the sockets.. I had similar fitting difficulties with the power plugs for the GTX560 card, not sure if the Corsair TX650 connections are a bit on the tight side..

Cabbages2011 · 15 Jan 2012 at 18:02

Had a muck around with ram sticks, it won`t post with a single stick in the C1 slot. Tried enabling XMP and messing around a bit to see if that`s help but it`s still just basically saying it doesn`t like C1 and C2 slots..

Cabbages2011 · 15 Jan 2012 at 19:50

Thanks Surveyor i`ll try that, although will be keeping a close eye on temps really precarious about the whole cpu/cooler seating procedure as i have little experience with it..

Cabbages2011 · 15 Jan 2012 at 20:50

Mines looks like any other P9X79 Pro i`ve seen - basically the cooler screws on top of the cpu without the x shaped backplate.. Don`t know if that`s what you guys meant..

Cabbages2011 · 16 Jan 2012 at 11:41

Haven`t loosened those thumbscrews back a touch as yet ( still a little scared in case i end up having to re-paste/re-seat ) but will do at some point.

Just messing about with the Asus AI Suite AutoTuning System LevelUp thing in windows ( as i`ve yet to tinker with manual bios overclocking ) - it`s got me to an OC of 4.68Mhz at 1.464v.

Cinebench is registering as 4.16Ghz with a score of 13.57 which is basically what i was aiming for as those cores will be largely used for Cinema4D rendering etc..

I`m guessing more juice could be squeezed out of it by manual tweaking the bios - i`m not looking to go to the absolute limit but the best i can safely get really..

I think that vcore value is prob about max safe level?

Cut and pasted screenie: