E8500 e0 or c0 Clocking

Geckovich · 11 Apr 2009 at 15:03

I just bought a brand new e8500 to play about with as I was able to get it at a good price.

The item description says both c0 stepping but also SLB9K, which according to intel is e0.

I got the chip cheap so either way I'm not that bothered, I just wondered what people here had found overclocking either stepping.

gurusan · 11 Apr 2009 at 15:07

99% of E0 chip overclock better than C0.

All should do 4-4.1 GHz though.

Geckovich · 11 Apr 2009 at 16:57

gurusan said:
99% of E0 chip overclock better than C0.

All should do 4-4.1 GHz though.

Yeah, by an average of 200mhz give or take, so I'm told. As long as I can hit 4Ghz I'll be happy. Cooling isn't an issue as I'm on water.

pastymuncher · 12 Apr 2009 at 14:08

My first one was a C0 which i got when they first came out. That was an awful clocker and needed high volts just to hit 4Ghz. That was then killed by the voltage (1.52v). My current one is a E0 and is a beauty. 4.5Ghz was easy. In fact i think it will go even further. It's just that i can't be bothered to try as i enjoy actually using the pc instead of stability testing all the time for what may only be a couple of hundred mhz.

Geckovich · 12 Apr 2009 at 15:04

Fingers crossed for E0 then. As stated I'm not fussed either way as I got it cheap, would be nice to get a good clocker though.

Dealz · 12 Apr 2009 at 15:18

@ pastymuncher

I see your at 4.5 what voltage do you have your CPU at?

pastymuncher · 12 Apr 2009 at 18:48

1.4v but there are others that can do it with less than mine. Gurusan has a damn good E8500.

gurusan · 12 Apr 2009 at 18:50

I sold it

Downgraded to an E7200 @ 3.8ish GHz, and TBH there's really not much difference.

I think pretty much ANY Core2 above 3.5ish ghz is all you need today....but I do miss my 4.5+ghz clock!

pastymuncher · 13 Apr 2009 at 14:52

gurusan said:
I sold it Downgraded to an E7200 @ 3.8ish GHz, and TBH there's really not much difference.

I think pretty much ANY Core2 above 3.5ish ghz is all you need today....but I do miss my 4.5+ghz clock!

I have to agree with you there though. When i did the cpu comparison thread once past 3.6Ghz the gains were getting smaller and smaller, especially for games and 3DMark.

Geckovich · 15 Apr 2009 at 10:14

It arrived this morning but I wont have time to test it until tonight. Though According to the box it's an SLB9K which is apparently E0, fingers crossed.

gurusan · 15 Apr 2009 at 10:19

yeah that's an E0. let us know how it clocks and what the VID and batch code are.

Geckovich · 15 Apr 2009 at 10:25

From the box the batch is Q827A507. Although googling that gets no results.

Geckovich · 15 Apr 2009 at 11:05

Curiosity got the better of me so I installed it (thankfully without needing to drain my loop) so VID will be revealed soon.

Edit: According to coretemp the VID is 1.25 though that seems a bit high, especially considering that with mobo set to auto it is only using 1.2. Does anyone know of a better app for finding VID?

Edit 2: Clocked to 4.1ghz at 1.25v but to get to 4.2 requires upping the volts from this to 1.31. Not really worth it for 100mhz. I'll play about some more when I have more time to try and find the max OC.

Also the temps of my loop have dropped massively now there isn't a quad dropping all it's heat in there. GPU idle temp has dropped from the mid 40's to low 30's and load from mid to high 50's to high 40's.

Geckovich · 29 Apr 2009 at 00:02

Ok ladies and gents (mostly gents I assume), I could do with a little help. My e8500 will boot into windows at 4.5GHZ but fails prime within seconds with a rounding error, though I can sit with it doing undemanding stuff for hours with no sign of a crash. Gaming or any heavy duty work results in a BSOD.

It takes 1.39v to get to 4.5gHZ but I'm currently running a little over 1.4 in an attempt to improve stability.

I'm on my P5Q deluxe with BIOS 1406, I heard this is the best so far for stability, if I'm wrong in this please correct me.

My settings are:

Which lets me boot to:

But prime95 results in:

Temps under load are high 50's, sometimes touching 60 for both cores and 40ish on the northbridge.

Load voltage goes up to 1.416.

It will also boot into Windows with a multi of 9 and bus of 500 but is a little less stable and crashes prime instantly.

Memory is out of the equation running below rated speeds - will run memtest on it when I have time.

Thanks in advance for any input.

Korduo · 4 May 2009 at 21:16

Hi,
I just myself a E8500 with same batch code for the price of a E8400. I also bought a ASUS P5Q Deluxe with some Corsair PC8500, still waiting for case and PSU.
My CPU is currently my Shuttle XPC priming at 4.05 @ 1.26v, booted at 4.5, but crashed before windows could load, don't wanna give it more juice until I get the ASUS + HS up and running.
looks like it needs more juice, not sure what is max volts a E8500 can take (safe-ish).

invisible69 · 5 May 2009 at 08:06

Korduo said:
Hi,
I just myself a E8500 with same batch code for the price of a E8400. I also bought a ASUS P5Q Deluxe with some Corsair PC8500, still waiting for case and PSU.
My CPU is currently my Shuttle XPC priming at 4.05 @ 1.26v, booted at 4.5, but crashed before windows could load, don't wanna give it more juice until I get the ASUS + HS up and running.
looks like it needs more juice, not sure what is max volts a E8500 can take (safe-ish).

According to Intel it can take up to 1.3625v

http://processorfinder.intel.com/details.aspx?sSpec=SLB9K