**Official e8400/e8500 Retail OC Thread

[|Oc|REvO_HsArC]

how about this one I got?



E8400 500x9
Default vid is 1.2375v

wc

still, without any errors, sometimes the pc simply restarts during IBT... It doesn't seem to be the cpu. IBT would simply show unstable results before the crash and it doesn't...

[lexus232]

Well, I hit 4400, but it requires about .1v more than 4200 and hits almost 13c higher too. What do you think guys, is <70 good enough or too risky for these chips?

In HWmonitor:
Remote 1 ~ Northbridge
Remote 2 ~ Southbridge
Room temp ~ 25C

i think it's awesome for C0! What settings you are using in BIOS?

[lexus232]

still, without any errors, sometimes the pc simply restarts during IBT... It doesn't seem to be the cpu. IBT would simply show unstable results before the crash and it doesn't...

try to test with Orthos Blend, i think it will show mistakes.

[R31Nismoid]

Well since the other week with the heatwave here and my BSOD...
I cant get my E8400 to 4320mhz/480FSB/1.280vcore

Im currently on 4185mhz/465FSB/1.296vcore, and thats about it. I CBF'd at the moment edging it up, to find the total limit

So it seems now i cant clock the CPU back to the original setting that was stable in cooler weather (and its cooler again now)
Every time i run Prime is fails one of the CPU workers in less than 5mins.

Any idea what would be causing it?
Ram or CPU im guessing... fk this is annoying as it was stable perfectly and passed hours on hours of every test under the sun.

[R31Nismoid]

Ok more playing.. E8400 to 4320mhz/480FSB/1.298vcore... failed prime again! Always the same worker, CPU #0


I moved the ram timings out to 5-7-7-18 and upped the volts to 2.16
(they are rated at 533mhz, 5-5-5-15 @ 2.1v)
So i might try 6-7-7-18 later on when i get home

Any ideas peoples?

I've always had a suspicion my ram wasnt totally happy as i set it to what the EPP says in CPU-Z and it never posted.
Maybe they are angry at me hehe

[gergregg]

Ok more playing.. E8400 to 4320mhz/480FSB/1.298vcore... failed prime again! Always the same worker, CPU #0


I moved the ram timings out to 5-7-7-18 and upped the volts to 2.16
(they are rated at 533mhz, 5-5-5-15 @ 2.1v)
So i might try 6-7-7-18 later on when i get home

Any ideas peoples?

I've always had a suspicion my ram wasnt totally happy as i set it to what the EPP says in CPU-Z and it never posted.
Maybe they are angry at me hehe

Break it down to testing the ram and cpu separately.
Test with memtest and see if it the ram. Let it go to 1000% if you can. I've had errors show up at 500-600% and prime was failing after long periods.

http://hcidesign.com/memtest/

[NidStyles]

IBT stable at 4.275Ghz. 475X9FSB 1.38Vcore.

I set the Vcore higher just for peace of mind. I will have better results when I finally get that new RAM in, and can get this board under water. Still in the process of building it. You should see my other toy Will post pics when I can find my camera.

http://valid.canardpc.com/show_oc.php?id=501725

[R31Nismoid]

Break it down to testing the ram and cpu separately.
Test with memtest and see if it the ram. Let it go to 1000% if you can. I've had errors show up at 500-600% and prime was failing after long periods.

http://hcidesign.com/memtest/

Ye ive got memtest86 on a boot CD, the ram passed in stock form./

Will have a crack @ that one overnight and see

[gergregg]

Ye ive got memtest86 on a boot CD, the ram passed in stock form./

Will have a crack @ that one overnight and see

I've seen a big difference between memtest86 and the windows version. I could memtest86 up to 580mhz and show no errors. In windows I could only muster 565 or so.

Good luck!

[jcniest5]

At my local MC store, I saw a few batches: Q828A and Q829A (both with a Pack Date: 09/18/08) and Q842A (Pack Date: 01/14/09). Anybody knows if these OC good or not? I used to own two when it first launched, sold them soon afterward in anticipation of the i7. I've been running on budget CPUs for awhile along with my i7 (since launch). I sold my two budget CPUs and now I need to get an E8400. It will go on my P5B Deluxe (non-WIFI). Anyone with info please post here. TIA...

[Jodiuh]

i think it's awesome for C0! What settings you are using in BIOS?

Damn. I just changed back to 4Ghz. The only difference's would be the obvious increase in Vcore (to 1.344 in windows w/ orthos loaded), a single notch drop in VTT, and of course the bus speed. Aside from that, here ya go:





It's much friendlier on my room temp wo/ that E8400 pumping out the heat 2 4.4Ghz. IMO, the risks and heat output simply aren't worth the extra 400Ghz.

[fatguy1992]

My Phase Unit just arrived along with it a E8500

Heres my first quick test.



I'v never used a dual or 45nm before so i'm still learning a bit. I know the E8500 is a C0, but i got it really cheap off the builder.

[WaterFlex]

how about this one I got?



E8400 500x9
Default vid is 1.2375v

wc

still, without any errors, sometimes the pc simply restarts during IBT... It doesn't seem to be the cpu. IBT would simply show unstable results before the crash and it doesn't...

You need increase Vcore by 2-3 notches. I had the same problem when I made my chip to work at 4500 at 1,3 Vcore.
1,34 is totally stable for me.

Nice chip btw

[|Oc|REvO_HsArC]

You need increase Vcore by 2-3 notches. I had the same problem when I made my chip to work at 4500 at 1,3 Vcore.
1,34 is totally stable for me.

Nice chip btw

You are right, that was the problem.
I got it fixed last friday by bumping the Vcore up to 1.30v.

Although it really didn't seem to be the Vcore, as my last 8400 would show errors before crashing.
SLB9J's sure are strange.

Up to 4500mhz this chip doesn't show signs of instability on OCCT or IBT if the vcore is not enough. It simply restarts in the middle of the test.
But above 4600mhz the behaviour is different. It shows errors instead of restarting.

My stepping is Q839A270.
I also tried two Q837's but they aren't very good.

[fatguy1992]

ATM i'm testing how low my Vcore can go at stock on my E8500. So far its down to 1.104v.



Anyone know whats the lowest ever for a E8500 C0 at stock?

[DOM.]

ATM i'm testing how low my Vcore can go at stock on my E8500. So far its down to 1.104v.
Anyone know whats the lowest ever for a E8500 C0 at stock?

I would try the lowest in the bios and see whats the highest oc you could get most cpus can run stock on the lowest volts


testing 4.5GHz 500X9 at 1.448v idk if its not that good ocer or need to get a new mobo p5b deluxe is kind of old

[vrdublu]

I just picked up an E8500 Batch #Q828A61A running that on an Asus P5Q deluxe and 2x2 gig corsair dominators. Just got the cpu up to 550 fsb with a low multi of 6 and 6.5 just to see if its capable. The only problem I'm havin is the ram keeps crappin out. I have the cpu at 1.325v and had the NB 1.42V with no success, any suggestions would be appreciated.

ps: all other settings left on auto, boots into windows sometimes and when it does fails blend.

[DOM.]

I just picked up an E8500 Batch #Q828A61A running that on an Asus P5Q deluxe and 2x2 gig corsair dominators. Just got the cpu up to 550 fsb with a low multi of 6 and 6.5 just to see if its capable. The only problem I'm havin is the ram keeps crappin out. I have the cpu at 1.325v and had the NB 1.42V with no success, any suggestions would be appreciated.

ps: all other settings left on auto, boots into windows sometimes and when it does fails blend.

might need more NB volts and whats the mem volts at ?

[fatguy1992]

I would try the lowest in the bios and see whats the highest oc you could get most cpus can run stock on the lowest volts

The lowest is my BIOS is 0.5v

[vrdublu]

might need more NB volts and whats the mem volts at ?

Well I tried it up to nb 1.52v with no success, the ram was set at 2.10 which I believe translates into 2.20v real. This ram does does 1100 at 2.1, this I am sure of, is it because it's a 4 gig kit the NB has trouble with it at higher fsb? any other ideas ?

[gergregg]

I just picked up an E8500 Batch #Q828A61A running that on an Asus P5Q deluxe and 2x2 gig corsair dominators. Just got the cpu up to 550 fsb with a low multi of 6 and 6.5 just to see if its capable. The only problem I'm havin is the ram keeps crappin out. I have the cpu at 1.325v and had the NB 1.42V with no success, any suggestions would be appreciated.

ps: all other settings left on auto, boots into windows sometimes and when it does fails blend.

Auto overvolts on this board so try (my settings at 566):

CPU PLL Voltage: --> set 1.56-1.60 (1.60)
FSB Termination Voltage: --> set 1.22-1.26 (1.22)
DRAM Voltage: what your ram needs for the speed you are running
NB Voltage: AUTO --> set 1.26-1.4 (1.32)
NB GTL Reference: AUTO
SBridge Voltage: AUTO
PCIE SATA Voltage: AUTO

[vrdublu]

Auto overvolts on this board so try (my settings at 566):

CPU PLL Voltage: --> set 1.56-1.60 (1.60)
FSB Termination Voltage: --> set 1.22-1.26 (1.22)
DRAM Voltage: what your ram needs for the speed you are running
NB Voltage: AUTO --> set 1.26-1.4 (1.32)
NB GTL Reference: AUTO
SBridge Voltage: AUTO
PCIE SATA Voltage: AUTO

Thanks very much, I will try this out and come back with some results, very psyched about tbhis cpu, it's an E0 stepping and easily booted at 550fsb with 1.3125

[fatguy1992]

Heres my top overclock, still lots of room to go higher

http://www.youtube.com/watch?v=pbmJtRkSlak

Look at the temps at the end

[Leeghoofd]

Push that CPU Fatguy1992... C'mon 5Ghz at least... do you really need +1.5 for just 4.7Ghz under that cooling ?

[fatguy1992]

I'm trying to start my pc atm, my ud3p is being a b****. Not sure if I need 1.5v, i just set it and it worked

Once I manage to get it to start up i'll do some more testing.