**Official e8400/e8500 Retail OC Thread

[cincyrob]

lol if 60 seems hot you dont want to see what it was before i RMA'd the other CPU.
72-75c under load before hand.

OCCT is about finished. 60c is as high as it got, taht was about 15 mins ago. i think the new paste has spread out a little more and im now only at 56c so its gone down. normally on these stress test it gets hotter and the end of the test.

[Ket]

75c? thats scary stuff.. only time I saw a CPU hotter than that was my old A64 3500+ when the thermal paste underneath the IHS broke down.. sucker got to 101c

[cincyrob]

thats why i RMA'd taht cpu. this is awsome temps i think. with some more breakin time with this paste i think it will come down some more.

here is occt finished and got the stable sign..lol
and real temp at idle. better now than when i first installed it all

[Ket]

Looking good now lets see 4GHz

[cincyrob]

lmao.. i new that was comeing..dont worry in a couple days i will have it 4+ghz.
i never was able to get it stable above 4.1 id sya cause of the heat issue. but im sure no problem this time around.ill see how high i can get it the nback it down to 4.0 i hope for everyday running. in realtemp right now im at 36c i love it..

[Ket]

Nice I'll put a guesstimation of 4.3GHz on your E8400. Your job is now to prove my guesstimation wrong

[loonym]

Loonym: I'm using a Xigmatek HDT on a DS3L and it covers up to 4.5ghz ok on an E0 e8500 (see above posts).
However, the DS3L will fail Prime or Orthos after 18min because the NB fails due to heat for anything over 4.3ghz..
I put on old DFI lanparty NB fan over the DS3L NB with doublesided tape and it's stable for me now .

I learned my lesson with the ds3l after the mosfets on my first one burst into flames. I put some small sinks on those and also replaced the TIM on the nb and have a small fan blowing there. Also I'll avoid running quads in it.

[cincyrob]

seeing i have it here at work and cant really get into it much... i did try it at 4.0 and it wouldnt post.ill try more tomorrow

[Ket]

Have at it man, have at it! Don't let that CPU win! Its sitting there right now.. laughing and giggling to itself like a little school girl.. "heheheeee! I don't POST 4GHz.. I'm not telling him why I didn't tehee!" You can't have that!

[SirDaemon]

lmao.. i new that was comeing..dont worry in a couple days i will have it 4+ghz.
i never was able to get it stable above 4.1 id sya cause of the heat issue. but im sure no problem this time around.ill see how high i can get it the nback it down to 4.0 i hope for everyday running. in realtemp right now im at 36c i love it..

If you use RealTemp 2.75 you will love it even more (TJ Max is now right)

[cincyrob]

link me up with a link for 2.75 if ya dont mind....yea im lazy well im at work any how..lol

oh its not gonna get the best of me on the first day out... ill let it run like this for the weekend then sneak up on it like a to of bricks....

[doompc]

Hey guys, how you all doing?

This Gigabyte won't work over 500MHz FSB
I tried about a lot of combinations, high and low vPLL, VTT and vNB...
None worked, 510 ~ 520 is the maximum I could even POST.
Any advice for 600MHz FSB ?

Meanwhile, I got 500MHz stable on incredible low volts:

CPU Skew 200ps
vCore 1,23v
VTT 1.22v
vNB 1.4v
vPLL 1.5v
GTLref1 0,79v
GTLref2 0,76v
NBref 0,73v
vMEM 2,16v (1200MHz)

[HDCHOPPER]

well doompc 600 fsb is not eazy to say the least ! but you should be able to eek out 525~545 maybe with high multi

[SirDaemon]

link me up with a link for 2.75 if ya dont mind....yea im lazy well im at work any how..lol

oh its not gonna get the best of me on the first day out... ill let it run like this for the weekend then sneak up on it like a to of bricks....

Here it is -» http://www.fileden.com/files/2008/3/...alTempBeta.zip

Now you have no excuse to leave it @ 3.6ghz

[cincyrob]

well there it is. but i got problems. ive been up all night trying eveything i know(which isnt much tbh)
i try and run OCCT Orthos,even the new intelburntest i will get the windows error wanting to shut down the program.all will run for a few second then give me the windows error.

heres what ive done.
i set my FSB overvoltage control to +0.1
i set my MCH overvoltage control to +0.1
CPU voltage to 1.375v

i get it to post, windows opens i can tool around with no problems but when i run the stress test it hits the bricks.
here a screen shot of my bios.


there is a new bios update for this board i wonder if updateing it would make a difference?
i have a GA-EP35C-DS3R mobo.just as new as my CPU.

thanks for the link to realtemp 2.75
with this CPU i notice abig difference in how fast stuff opens/loads up compared to the one i RMA'd its alot faster. but i cant seem toget this one to 4.0ghz.
i set the vcore to 1.375v in all the testing programs show actual volts as 1.32v man thats a vdrop isnt it?should i try higher to get the closes to 1.365 as actual volts?

thanks for any help guys

[anzial]

Does VID of 1.1v mean something or not? I've got this E0 E8500, and I just found out it has VID of 1.1v... Kinda nice imho, runs pretty cool at stock speed dunno about oc'ing, didn't oc it yet.

[Kartoff]

doompc, how did you calculate that 0,79v and 0,80v. are 67% of 1,32v ???

For 0,79 or 0.80v GTL you need to set 0,605 and 0,610 in BIOS...

1,32x0,605=0,7986
1,32x0,610=0.8052

instead of 1,32x0,670=0,8844

[unclewebb]

Finally got around to putting my E8400 back in service. Here's some temperature testing with the IR thermometer pointed at the IHS:
http://www.xtremesystems.org/forums/...postcount=2190

[doompc]

Kartoff, yeah I messed the calculations, I thought the ref values would be locked to 1.2v FSB, but after setting vFSB in the BIOS the values for GTLref are updated.
Luckily, this Gigabyte allows to set the voltages direcly (not in percentages):


If I increase the vFSB, should I increase the ref values too or stick with the actual voltages (for 1.2v) ?
Thank you

[scottc19]

Anyone get an e8500 from newegg with e0 yet?

[sepultribe]

can anyone tell what kind of vcore is needed for 440-450 fsb on a 8400? It seems that i cant get past 430 with the system mentioned in my sig no matter what voltages i put. Also mosfet temps reach 60+ during prime95 stressing, is that normal? thnx

[tomati]

can anyone tell what kind of vcore is needed for 440-450 fsb on a 8400? It seems that i cant get past 430 with the system mentioned in my sig no matter what voltages i put. Also mosfet temps reach 60+ during prime95 stressing, is that normal? thnx

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

[loonym]

can anyone tell what kind of vcore is needed for 440-450 fsb on a 8400? It seems that i cant get past 430 with the system mentioned in my sig no matter what voltages i put. Also mosfet temps reach 60+ during prime95 stressing, is that normal? thnx

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?

[Kartoff]

Kartoff, yeah I messed the calculations, I thought the ref values would be locked to 1.2v FSB, but after setting vFSB in the BIOS the values for GTLref are updated.
Luckily, this Gigabyte allows to set the voltages direcly (not in percentages):


If I increase the vFSB, should I increase the ref values too or stick with the actual voltages (for 1.2v) ?
Thank you

On P5Q Dlx when i change voltage i need to change GTL if i want to stay around 0.8v. So if i increase voltage i need to decrease GTL reference or to leave it untouched to get more GTL volts... I see that on GB this are solved in different much easier way.

[gurusan]

Got a good one here and it's not even an E0 stepping