**Official e8400/e8500 Retail OC Thread

[HDCHOPPER]

yes thier are some good ones makes it hard to want an 8600

[Phoenix_TT]

I would like some guidance on how to proceed.

I have an 8500 c0 CPU with a Asus P5W DH Deluxe mb. I have the latest bios, which I think is a beta and there is a problem with early revisions of this mb not being able to set a voltage lower than 1.45!?

Anyhow I've overclocked my 8500 to 3.8Ghz on AUTO CPU voltage and this appears to be stable, however if I try to go higher then it will boot but not load Windows, which blue screens.

Now is this my memory or do I need to apply more volts to the CPU ? At the moment I can't do apply more CPU volts, so I wanted to rule out the memory causing the failure.

Is using memtest a good tool, to see if my memory is the "problem" ?

Any other suggestions ?

[Leeghoofd]

Most P5W's are maxing out around 400FSB with these CPU's, some have had more luck, but most users are stuck there... If you want more grab another board... and make sure that NB is well cooled...

[cincyrob]

OK it don't look like i can get this E8400 to run at 4.0ghz. well not on this board any way. taking this board back to micorcenter and swapping it out for a GA-EP45-DS3R. anyone have any luck with the P45 boards????? i can get it to go up to 3.8ghz but thats it. the vdrop is mad on these gigabyte boards. id probably have to set my vcore to 1.5 to get it running at 1.365v

[sepultribe]

Increase MCH and VTT voltage , I was able to get over 500 fsb with E8500 on IP35 Pro

tried mch up to 1.56, vcore up to 1.5 and tried boosting vtt a bit with no success at all. prime95 fails instantly after several seconds if i go 440+

Do Ace's bolt-mod as found in the ip35-pro thread. What do your other voltages look like? I don't think I have an especially lucky e8400 but mine runs 467fsbx9 (4200) stable with 1.344v load on air. What bios are you using?

im using bios 16... im starting to believe that i have a defective chip. i once bumped voltage close to 1.55 when i was on stock cooling trying to get prime stable, but that was for 10minutes max and uguru never showed more than 75-80 C. would that cause degradation or sth on the chip that could justify this kind of behavior?

thnx a lot for the answers


edit : this pic is from 12mins of priming @ 400fsb all stock except vcore which was 1.2850 (it would get errors after the 1st test if i set vcore lower than that). isnt this kind of vcore needed too much? and are these temps showing that im in need of doing the bolt mod on my m/b?

[total90]

Hello ..

i want ask about my temp it is ok

i have E8500 @ 4.0GHz and thermalright ultra 120 eXtreme

and my ambient = 24c

with blend test core temp don't go higher 53c and small test 60c



Any suggestion?

regarads

[cincyrob]

Hello ..

i want ask about my temp it is ok

i have E8500 @ 4.0GHz and thermalright ultra 120 eXtreme

and my ambient = 24c

with blend test core temp don't go higher 53c and small test 60c



Any suggestion?

regarads

those are excellent temps. i wouldnt worry about a thing with those. what do you idle at? around 36-38c?

[cincyrob]

im getting there still cant get 4.0ghz stable. but as you see with the intelburntest its fine at 3.8ghz. but i do have my vcore set higher right now than i hade it for 4.0..lol
im running OCCT right now and all is well.

i aslo updated my bios to F3 from F2. still not sure if i should trade this board in on the GA-EP45-DS3R. I STILL have 24 day to take this board back for a axchange or replacement. the P45 board is the same price i paid for this one.

[tomati]

tried mch up to 1.56, vcore up to 1.5 and tried boosting vtt a bit with no success at all. prime95 fails instantly after several seconds if i go 440+



im using bios 16... im starting to believe that i have a defective chip. i once bumped voltage close to 1.55 when i was on stock cooling trying to get prime stable, but that was for 10minutes max and uguru never showed more than 75-80 C. would that cause degradation or sth on the chip that could justify this kind of behavior?

thnx a lot for the answers


edit : this pic is from 12mins of priming @ 400fsb all stock except vcore which was 1.2850 (it would get errors after the 1st test if i set vcore lower than that). isnt this kind of vcore needed too much? and are these temps showing that im in need of doing the bolt mod on my m/b?

I see that you use a 2 x 2gb kit of ddr2 PC6400 , do you know their potential ? may be they are the weaker point of your OC ? Did you test their max OC ?

With 2 x 2gb kit you will have to increase the Vmch a little bit more than with a 2 x 1gb. I was on the bios 17 final when I tried the E8500, don't know if it's change something ?

[total90]

those are excellent temps. i wouldnt worry about a thing with those. what do you idle at? around 36-38c?

thanks cincyrob for replay ...

my idle temp are 39c

thank you

[sepultribe]

I see that you use a 2 x 2gb kit of ddr2 PC6400 , do you know their potential ? may be they are the weaker point of your OC ? Did you test their max OC ?

With 2 x 2gb kit you will have to increase the Vmch a little bit more than with a 2 x 1gb. I was on the bios 17 final when I tried the E8500, don't know if it's change something ?

max overclock of my ram is around 1080, wasnt even close to that when i tried 450 fsb 1:1 (ram ~900). plus i had relaxed timings (5-5-5-15) and plenty of volts for the dimms (2.1) and mch (tried up to 1.56).

im just trying to understand if its the pwm/nb temps thats causing all this or a dumb cpu chip.

[loonym]

sepultribe, your pwm temp doesn't really look that high in the screenshot, mine was hitting 90 before I redid it. But your vcore also doesn't look too high either. In the uguru screen you posted I see only 1.26 volts. Try just using small fans to cool the pwm and nb sinks. I've really only used quads in my ip35-pro so I can't help much with your settings but I like that bios 16. Maybe if you look in the big ip35-pro thread you can get some settings from there.

[sepultribe]

in that screenie i posted i was trying to get fsb 400x9 stable with my rams at 1:1. uguru shows 1.26 altho its actually 1.28 from bios. isnt that quite a lot for only 400 fsb? i've read ppl do that with stock voltages...

i'll try 440+ when the weather gets cooler again

[ThatGuy16]

Looks like i have just about lost my bragging rights to the E0's

[anzial]

Is it normal that VID is switching when EIST/Speedstep is enabled? I'm running E0 e8500 and when I disable speedstep, it runs with 1.1 VID reported in CoreTemp but when I enable Speedstep, VID jumps from 1.1 to 1.2 under load in CoreTemp (on idle it stays at 1.1)... It also jumps in CPU-Z. Funny enough, it runs just dandy with 1.1 at stock speed when I disable Speedstep, load or not..

[HDCHOPPER]

ya thats normal

[dqniel]

Setup:

IP35-Pro w/ BIOS 17
2x2GB G.Skill DDR2-1000
Silverstone ST50EF-Plus 500W
E8400 E0
TRUE w/ low speed S-Flex
Antec P182 w/ low speed Yate Loons

So, all near-silent air cooling

534 x 9 = 4806Mhz SP 1M (haven't tweaked memory at all so time probably is bad)
vcore - 1.45
vtt - 1.30
vmch - 1.64





Passes wPrime 1024 and SP 32M at 518 x 9 = 4662
vcore - 1.38
vtt - 1.20
vmch - 1.48


Definitely happy with a nearly silent PC that does 4.65Ghz on air 24/7 All with a $160 CPU. Praise the E0 revision.

[HDCHOPPER]

no really thats a pretty good pi time
eye am getting 9.838 at 4.7 speed

also edit in your batch # please

[scottc19]

Anyone comfirmed where to buy an e8500 e0 yet?

[LagunaX]

Anyone comfirmed where to buy an e8500 e0 yet?

Fry's electronics store- but you have to ask for the smaller box as they have both.

They clock very well - see here:
http://www.xtremesystems.org/forums/...postcount=4363

[scottc19]

I guess thats the only place, to bad it would be a 4 hour round trip to go there I called them and they of course said if you order it it is random which one you will get
Somone buy one from newegg and see if its e0 or not lol
otherwise I think I will just fork over all my money and get an 8600

Fry's electronics store- but you have to ask for the smaller box as they have both.

They clock very well - see here:
http://www.xtremesystems.org/forums/...postcount=4363

[golfjam]

Fry's electronics store- but you have to ask for the smaller box as they have both.

They clock very well - see here:
http://www.xtremesystems.org/forums/...postcount=4363

I got mine at Fry's also, in Industry Hills, CA. Great clocker, look at my sig.

[unclewebb]

I read on another forum that at the exact same FSB and multiplier that, an E8500 can outperform an E8600 because the E8600 has more on chip L2 cache latency. Does anyone have these two processors available to do some testing on the same motherboard at the same FSB and multi with the same memory / OS / etc? Not much use looking for an E0 if the C0 performs about the same at a lower MHz.

If you see a difference in gaming or other benchmarks then try running Membench in ScienceMark 2.0 or any program that shows L1 / L2 cache latency to see if Intel has increased the latency which could negatively effect overall performance.

RealTemp 2.76 is available which gives you the option to see the Distance to TjMax in the System Tray.

http://www.fileden.com/files/2008/3/...alTempBeta.zip

[anzial]

better test would be E0 8500 vs C0 8500 OR E0 8400 vs C0 8400, imho...

[zlojack]

better test would be E0 8500 vs C0 8500 OR E0 8400 vs C0 8400, imho...

Although if the 8500 performs better than the 8600, then it's worth doing.