**Official e8400/e8500 Retail OC Thread

[HDCHOPPER]

43c idle is kinda toasty btw thats a great chip you got thier Godmyster best to get a just as great cpu cooler on it asap & keep it !

teem group ran pretty good ram for the most part best to get low cas ram (4's) but if all yours will do is 5-5-5-5-15 them maybe rum em at 1t and work on a lower tfrc

[Godmyster]

I got 43º but with my stockcooler and at 1.3vcore can put more vcore and see if i can get more Mhz with this cooler?

Thanks

[HDCHOPPER]

have no dout your chip can do 4.5 probbly at around 1.4xx volts tho

but load temps are gonna rise fast past 1.3 volts 4.0 on a stock cooler is pretty darn good !
only way to know tho is to try and see what ya get

[Godmyster]

So its ok if i rise up the vcore more even thought i got stockcooler?

[zodden]

The journey from loading stock vcore on my E0 8400 @ 4ghz to 4.150Ghz has been interesting. I think first off my AB9 QuadGT (P965) is showing its age. I could sure use that half multi. To go 150mhz (4ghz-4.150ghz) I had to raise vcore from 1.25 to 1.35, VTT from stock to 1.40 and Mch from 1.35 to 1.60

Heat has been good but I think I am reaching my limits with this. Maybe if I upgraded to 1100 DDR2 I can take it higher, but increasingly I think a new MB with a newer chipset would be a good idea if I want higher.

[dnottis]

Im not finding many high OC E0 results, alot of low volt 4000mhz runs. Not really sure if this is good or not, load temps were 60-61 on water.

[Hughyhunter]

Impressive Dnottis!!!

[zlojack]

I wouldn't worry too much about idle temps with these chips. They've been proven to be all over the place.

Load temps are what's more important.

[M-XXXX]

What are max safe voltages? Im getting E8600, and I had only 65nm until now (if I dont count 45nm on test (SS,...) Im looking for safe voltages under water for 24/7

[dnottis]

What are max safe voltages? Im getting E8600, and I had only 65nm until now (if I dont count 45nm on test (SS,...) Im looking for safe voltages under water for 24/7

1.36v and lower safe per Intel. Over 1.45v damage is occuring to the chip. Watch PLL (1.50v) and VTT (1.10v) keep them close to stock.

I stick to <1.40v on water to avoid early death.

[Godmyster]

Why is it that i lost Marks when i put the cpu @4.2mhz@1.35vcore im using stockcooler, i got a better score @3.6 with default vcore....

[HDCHOPPER]

Why is it that i lost Marks when i put the cpu @4.2mhz@1.35vcore im using stockcooler, i got a better score @3.6 with default vcore....

did your memory multi change ? different memory speed makes a big differance

[Godmyster]

i Dont think so at least i didnt change anything on the mems

[xMrBunglex]

Why is it that i lost Marks when i put the cpu @4.2mhz@1.35vcore im using stockcooler, i got a better score @3.6 with default vcore....

sounds like you aren't stable at 4.2. if you can stabilize your OC, your benchmark scores should go up.

[s1Lv3r]

mine e8500 Q820A706 pack date 07/29/08 any ideas

[zodden]

CPU-Z reports wrong vcore on Abit QuadGT so:

4.1 Ghz
Vcore (at idle) 1.31
VTT: 1.40
Mch 1.55



I didn't do much testing at 4.2 Ghz but did some without issue at Vcore 1.33- I will test more tomorrow.

I was able to do this also but my memory craps out so its not stable.



With a newer chipset (this motherboard is from early 2007) and better mem I think I can easily do better. As it is I am impressed that the AB9 QuadGT does this well with it.

[Kartoff]

zodden, when i buy mine E8400 E0 i try 4300 MHz @ 1,288v. just for the first BOOT to try and it works... I was with C0 before this, who cant do 4GHz, even with 1,4v and was so happy Now i run this at 554x8 @ 1,46v. BIOS...

[joger]

Crappy C0 here and crappy P5E Deluxe 0205 broken bios (detects either 33xxMB or 51xxMB of my 4gb of ram) was holding me back:
http://www.chemfy.fi/series/index.ph...n/&file=pi.jpg

Tests will continue in the upcoming weekend with this new Rampage Formula 0408 Bios, and colder air

Oh, and the Batch was Q816A279 (not sure about the last 3 numbers).

EDIT: on 1.336 - 1.344v it posts at a max of 4504mhz, boots to windows at 4100mhz and is IntelBurnTest-stable at 4005mhz

[zodden]

zodden, when i buy mine E8400 E0 i try 4300 MHz @ 1,288v. just for the first BOOT to try and it works... I was with C0 before this, who cant do 4GHz, even with 1,4v and was so happy Now i run this at 554x8 @ 1,46v. BIOS...

Thats some good clocks! I can't go over 510 FSB on this motherboard with 2x1GB of mem. When I move to 2x2GB I can't go over 480 FSB.

Aren't you worried about 1.46V though for 24/7 use? I am struggling with 1.40V for 4.2 Ghz over 1.31V for 4.1 Ghz. The extra 100mhz is nice but the higher voltage worries me a little after reading much of this thread.

[MorGo7h]

I love my E8400 that did yesterday 4.00ghz (not orthos stable but 4M was possible) and that today wont post at the same settings...
I have no clue what's going on... I changed all the settings of my mobo and i cant post at more than 410fsb on 9 multi, but 8*500 boots when I'm lucky...
Vcore: 1.35 and tried 1.4 too
VTT: 1.14
Vppl: 1.54
GTl's: Auto :x
Vnb: 1.26-1.3

[dnottis]

I love my E8400 that did yesterday 4.00ghz (not orthos stable but 4M was possible) and that today wont post at the same settings...
I have no clue what's going on... I changed all the settings of my mobo and i cant post at more than 410fsb on 9 multi, but 8*500 boots when I'm lucky...
Vcore: 1.35 and tried 1.4 too
VTT: 1.14
Vppl: 1.54
GTl's: Auto :x
Vnb: 1.26-1.3

Seriously - welcome to the world of 45nm. I have an E0 E8500 that is stable one second and not the next. Fighting to figure out why for the last couple of days. I can prime for hours, then reboot, try prime just for giggles and it fails within seconds and won't game any longer.

[Retro]

Seriously - welcome to the world of 45nm. I have an E0 E8500 that is stable one second and not the next. Fighting to figure out why for the last couple of days. I can prime for hours, then reboot, try prime just for giggles and it fails within seconds and won't game any longer.

Exactly. I bought an E8500 CO that performed almost identical to my current E8400, same volts required and not stable beyond 4050 MHz. Extra half multi didn't help either way. My current "stable" setup passed Orthos blend, small fft, etc. and OCCT for several hours, then today I fire up the computer and I get a windows "The System Has Recovered From A Serious Error" message Now I'm debating whether it would be worth it to get an E8600 to play with

[zodden]

Exactly. I bought an E8500 CO that performed almost identical to my current E8400, same volts required and not stable beyond 4050 MHz. Extra half multi didn't help either way. My current "stable" setup passed Orthos blend, small fft, etc. and OCCT for several hours, then today I fire up the computer and I get a windows "The System Has Recovered From A Serious Error" message Now I'm debating whether it would be worth it to get an E8600 to play with

This happened to me today. I have been testing the 8400 E0 at 4.2 Ghz. I load up orthos blend and it craps out at 3 minutes. I get angry and restart it and the damn thing went for 14 hours.

[Utnorris]

Anyway to be able to tell the stepping, ie EO, just by looking at the box?
Thanks,
Utnorris

[BlueAqua]

Look for SLB9J stepping code. I got mine in a smaller box too.