E6400 Overclocking

Wizzkidy · 30 Jan 2008 at 09:32

Hi all,

I have clocked my E6400 from stock to 3Ghz but wow the temps are high! I'm using a zalmans HS/Fan (the big daddy)

Before I cleaned it out and reapplied HS Paste it was idle at around 55C :eek:

load was like 65!

Afterwards when clean and paste reapplied (artic silver 5) it still only dropped to around 51C idle 64C load!

I presume this is way to hot!

So I put it down to 2.4Ghz and its still idle around 50C and load 63C!

I can only assume its my case or I have maybe not got the HS on properly or is this the temps I shoudl expect?

feriso · 30 Jan 2008 at 09:49

Sounds hot - I've got an e6400 on a dsr3 and o/c to 3.3 (1.45V) and that runs about 40ºC idle and about 54ºC load and thats with a Tuniq Tower - maybe it is bad seating. I take it you're using a small amount of AS5 on the hsf?

Darryl_1983 · 30 Jan 2008 at 09:55

Did you check the flatness of both the cpu and the hsf? I managed to get the load temps on my set up down by 20 degrees by lapping them both. My tuniq tower was so far from flat i couldn't believe it.

Wizzkidy · 30 Jan 2008 at 10:59

Darryl_1983 said:
Did you check the flatness of both the cpu and the hsf? I managed to get the load temps on my set up down by 20 degrees by lapping them both. My tuniq tower was so far from flat i couldn't believe it.

Erm, good point from what I could see when I put it back on it was flat maybe this is an issue but tbh the hsf screws down onto the braket which pushes it down so I can only assume it is hitting the CPU spot on

I'll have to re-seat it again to make sure. But yes its really hot and I'm wodering why

Wizzkidy · 30 Jan 2008 at 11:01

feriso said:
I take it you're using a small amount of AS5 on the hsf?

I placed a thin layer of paste to the CPU like I normally do, maybe its a little too much as I did tend to put a little less on last time.

Really can't be asked to take it apart again but I might have to

Thanks

Darryl_1983 · 30 Jan 2008 at 11:39

Wizzkidy said:
Erm, good point from what I could see when I put it back on it was flat maybe this is an issue but tbh the hsf screws down onto the braket which pushes it down so I can only assume it is hitting the CPU spot on

I'll have to re-seat it again to make sure. But yes its really hot and I'm wodering why

No matter how much force you use you can't force the cpu and hsf to make full contact. When i took mine off the first time it was only making contact with a max of 20-25% of the cpu, i could tell straight away because the paste in the middle of the cpu was untouched, there was only a bit of paste on the hsf that had transferred onto it from the cpu.

I then used a credit card against the surface and held it up against the light to see how bad it was. Best to check straight from side to side and also corner to corner in all directions.

Skeeter · 30 Jan 2008 at 15:05

My E6400 ran at 50 idle and 65 load under the stock cooler for over a year! No issues at all. Now its under and Artic Cooling F7 Pro at 3.2Ghz with temps of 40 idle and 55 load...

Wizzkidy · 30 Jan 2008 at 16:47

Skeeter said:
My E6400 ran at 50 idle and 65 load under the stock cooler for over a year! No issues at all. Now its under and Artic Cooling F7 Pro at 3.2Ghz with temps of 40 idle and 55 load...

Interesting, at the moment mine idles at 50 and load 65, it don't seem to matter if I have it at 2.4 or 3Ghz the temps are always around the same.

Dwbreeze1982 · 30 Jan 2008 at 16:59

these chips do run hot, i had 1 at 3.4 ghz using 1.65 volts. Under load it hit 80. Still i didnt mind to much about the heat. Use less volts and try to get it stable

Wizzkidy · 31 Jan 2008 at 12:32

Dwbreeze1982 said:
these chips do run hot, i had 1 at 3.4 ghz using 1.65 volts. Under load it hit 80. Still i didnt mind to much about the heat. Use less volts and try to get it stable

Well I have run prime95 for long enough and i have also stressed it in games, I have seen a top temp of 69 and it all seems stable enough

This is at 2.4Ghz so I can only assume this is OK since its stable. I might try putting it to 3Ghz again and checking tmeps

Skeeter · 1 Feb 2008 at 15:06

Wizzkidy said:
Interesting, at the moment mine idles at 50 and load 65, it don't seem to matter if I have it at 2.4 or 3Ghz the temps are always around the same.

I went to about 2.8 at first, then 3, then 3.2 with no increase in heat.

Basically my F7Pro dropped the temps by 15-20 degrees, and they stayed there!

Althulas · 2 Feb 2008 at 00:15

I have my [email protected] and cooled with a Zalman CNPS9700-LED with 1.48vcore due to droop but runs with temps in the mid 50's under load and high 60's under prime but who runs there cpu@100% load 24/7?? Has been stable for the last 10/12 like this. Does sound like poor seating though and a desent cooler makes the difference. Hope you have it sorted soon.

Andrew G · 2 Feb 2008 at 01:46

Seems lapping really does make a difference then at higher temps :confused:

Peter-B · 2 Feb 2008 at 03:03

but who runs there cpu@100% load 24/7??

I Do running BOINC!

E6400 @ 3.5Ghz 24/7 AFPro7.

Ambiant temp 24C, TAT = 59C.
vcore 1.5

Great CPU & HSF, just reseat it & make sure you have enough case fans to keep it cool

Althulas · 2 Feb 2008 at 15:41

Peter-B said:
I Do running BOINC!

E6400 @ 3.5Ghz 24/7 AFPro7.

Ambiant temp 24C, TAT = 59C.
vcore 1.5

Great CPU & HSF, just reseat it & make sure you have enough case fans to keep it cool

Got me there