High Temp on 2nd Hand OC Setup

Whippet79 · 19 Oct 2011 at 16:17

Hi,

I've got a 2nd hand comp that was originally a OC uk overclocked bundle:

CPU: Intel Core i5 760 2.80GHz @ 4.00GHz
Motherboard: Gigabyte P55-USB3 Intel P55 (Socket 1156) DDR3 Motherboard
RAM: Corsair Dominator 4GB (2x2GB) DDR3 PC3-12800C9 1600MHz Dual

its cooled with a Corsair H50

The seller had lost the original settings and it was running @ 3.7 Ghz when it arrived. I've found the original OCUK settings following advce from here.

With the side panel open its running at around 43 degrees (via CoreTemp)

On Prime95 it ran at 85 degrees after 5 mins of testing!

These are the BIOS settings form the OCUK profile - anything obviously wrong?

Ai Overclock tuner - Manual
OC From CPU level up - Auto
CPU ratio setting - 21
Intel Speedstep Tech - Disabled
BCLK Freq - 191
PCIE Frequency - 101
DRAM Frequency - DDR3 - 1528MHz
QPI Frequency - Auto
ASUS/ £rd Party UI Priority - Asus Utility

OC Tuner - Turbo Profile

DRAM Timing Control - All set to auto

CPU Differential Amplitude - Auto
CPU Clock Skew - Auto

CPU Voltage Mode - Manual
Fixed Voltage - 1.40625

IMC Voltage - Auto

DRAM Voltage - 1.6500

CPU PLL Voltage - Auto

PCH Voltage - Auto

Load-Line Calibration - Enabled
CPU Spread Spectrum - Disabled
PCIE Spread Spectrum - Disabled

thanks for looking

Hagar · 19 Oct 2011 at 16:23

Whippet79 said:
Hi,

CPU Voltage Mode - Manual
Fixed Voltage - 1.40625

thanks for looking

I would try to get the volts down a bit if possible. Otherwise it looks reasonable.

I would also enable speedstep for day to day use.

these are quite warm processors but 85C is a tad high. What is it like with the case closed, sounds like it needs more ventilation, airflow?

Staffy · 19 Oct 2011 at 16:42

Maybe re-seating the heatsink would help, it may have moved slightly when being moved.

Whippet79 · 19 Oct 2011 at 18:20

Yeah I'm thinking now that it must be something wrong with the H50. I haven't tried it with the case closed yet. I have got one fan running in the bottom and one to go in the side when its all closed up. I guess I'll have to get the cooler off and try reseating it with some new thermal compound...

Whippet79 · 20 Oct 2011 at 14:06

Ok, screws on the pump mount were able to be tightened a tad and I'm now running 79 degrees max, some improvement. Do you think that the cpu could cope with it like that? Removing everything to re-seat the pump / heatsink would be a major pain...

Hagar · 20 Oct 2011 at 14:15

I think the H50 is best blowing into the box, is that so in this setup? Also it may be worthwhile looking at push pull if is not already. What is the state of the rad, dust etc?

It may be better with the case side on and the side fan set to exhaust to remove the heated air inside due to the H50 intake.

Whippet79 · 20 Oct 2011 at 15:25

Yup - the original owner had it the wrong way round as the case doesn't really fit the 120mm fan. I've done some dremmelling and got it fitting nicely now!
With the side fan on and case closed its pretty much the same temps - the case doesn't have a top fan vent so that doesn't help much so at the mo I have H50 fan in at rear, side fan out and bottom fan in (directing air towards gfx fan)
I guess I should take the voltage down a tiny bit and see if it's stable. What voltage should I try? I guess OCUK just put standard settings on all these bundles rather than individually tweaking...
Failing that - I could take the overclock down a bit - which setting should I alter and by how much?
Again appreciate the help - last time I did this it was all IDE cables, floppies and FSBs so I'm well out of touch!

Whippet79 · 20 Oct 2011 at 16:21

Just popped to ******s and trying push-pull now...

Whippet79 · 20 Oct 2011 at 16:24

...ok generic electronics store...!

Whippet79 · 20 Oct 2011 at 17:15

76 degrees with push pull - into the acceptable range yet?

Snaggle · 20 Oct 2011 at 17:28

Still to warm . I would look at refitting the h50 and repasting it ..

Hagar · 20 Oct 2011 at 23:13

Getting there, I would look for a 3.8GHz (20 x 191) 24/7 OC at the minimum stable voltage (1.38?). There will not be many bottlenecking issues at that Overclock and it leaves a bit of headroom.

Whippet79 · 21 Oct 2011 at 03:25

Thanks. Will go for a re-seat tomorrow and then if no joy I'll try those settings. When OCUK sell the guaranteed 4GHz oc bundle is that regardless of temperature?

Whippet79 · 23 Oct 2011 at 21:25

Re-seat with AS5 is giving temps 5 - 8 degrees higher... I guess it'll take a while for curing but still not great. So either it's a crap H50 or my chip just doesn't like being pushed...

Whippet79 · 24 Oct 2011 at 19:08

Working with a higher CPU multi and a lower Bclk I can drop the voltage and therefore the temps quite a bit.... is 22 x 173 for 3.8MHz as good as 20 x 191?