E8400 OC

[bizoot]

my current system:
processor
intel core 2 duo e6750 2.66 right now OC'd to 3400MHZ (425X8)
MOBO
GIGABYTE GA-P35C-DS3
RAM
CORSAIR 2X1GB 1066MHZ
CORSAIR 2X1GB 800MHZ
(TOTAL 4 GB)
CPU FAN
OCZ VENDETTA 2
my question is...
If I buy an E8400 processor, which stable speeds should I be able to reach with it?
And what will limit me? My mobo? Ram? I know for sure my slow ram (800MHZ) will limit me, but if I remove it, will my mobo still limit me? (Remember, right now I'm at 425X8).
THANKS!!!

[JLK03F150]

The regular P35-DS3 is a good overclocker & your board should clock pretty well too. Have you tried to push the E6750 higher than 3.4GHz?

The 2x1GB of DDR2-800 will certainly be an obstacle, and 4 sticks of DDR2-1066 might be a problem too, that's a lot of stress on the North Bridge. If you were to get 2x2GB of DDR2-1000, DDR2-1066, or even some DDR3 you would have a good chance of hitting 4.0GHz (450x9). Maybe higher.

[bizoot]

Why will 4X1GB 1066 be a problem?
I'm thinking of replacing the 2 800MHZ with 2 new 1066MHZ.
but if u say this is a problem, this means I need to get rid of the 2 1066MHZ too?
what a pity...

[Aaron_8015]

Take the 800mhz sticks out.... This will lower the stress on your n-bridge and should let you clock higher.

[JLK03F150]

Four sticks add a lot of load (and heat) to the north bridge. If you add enough volts to the DDR800 it might clock as well as the DDR1066. You can try an experiment pushing the RAM by lowering the CPU multi to 6x, then increase the FSB beyond 425MHz. Just be sure there is a fan, or really good airflow, on the north bridge.

445x9=4005MHz <--That's your goal FSB if you wanna get a E8400.

[bizoot]

So I OC'd my E8400
450X9, 1.3500 VCore.

I ran OCCT but after 5 minutes it crashed because it reached the max cpu temp (which I changed from a default of 80 celcius - to 72).
I changed it to 72 because I saw on the intel website that the thermal specification is 72.4 celcius for this cpu.

Is this really the highest temp recommended? Or could I set the max temp a bit higher??
Thanks!

[bizoot]

now I watched a streaming movie from a website on fullscreen and after about 40 minutes the picture froze and I had to shut down.
I changed the OC settings to 445X9, 1.325 VCore.
right after boot, I started HWMonitor, and a few seconds later I saw the max temp of core#0 spiked up to 64 celcius (core#1 max temp is still at 58 degrees only)!
Is this ok? I don't understand, even after lowering the vcore why does this happen?

[bizoot]

OK I've been running prime95 for about 2 hours and using real temp v3.0 to monitor temps.
I see the max temp reached by both cores is 66 degrees.
distance to TJ max is about 31 in core#1 and 33 in core#2...

[KarmaKiller]

Prime 95 is a good stress tester, but IMO there are better. Try Intel Burn Test, and see what temps that gives you. (I imagine it'll be warmer then what your getting now)

As far as the temp difference in between the cores, that's normal, so nothing really to worry about. On my Quad I get almost a 10c difference in cores.

[bizoot]

WOW!!!
I just used intel burn test, and after a few seconds the temps reached 75 degree max!
Distance to TJ max is about 20...