**Official e8400/e8500 Retail OC Thread

[Hughyhunter]

I want to bench mine above 4.5Ghz so bad, but i can't seem too get above 512FSB. It will completely lock up after a couple minutes into windows. I have raised my FSB, and MCH, i know its not my ram...

How do you know it's not your memory?

I benched at 500x9 with 1.6 volts on air. It made it through 3dmark06... I was pleased.

Do you have water on the chipset? If so I doubt your chipset is the limiting factor. I would start with memory than start working with voltages.

It might be different with me considering my 780i... however I had great luck with 800mhz unlinked. Still able to keep very tight timings too.

[ThatGuy16]

Maybe Chipset High TEMPS ?
My chipset is burning like a HELL when raising Vmch up to 1.5...

I have a fan on my NB now, i thought that would help, but it didn't Its cool to the touch now, before it was pretty darn hot.

How do you know it's not your memory?

I benched at 500x9 with 1.6 volts on air. It made it through 3dmark06... I was pleased.

Do you have water on the chipset? If so I doubt your chipset is the limiting factor. I would start with memory than start working with voltages.

It might be different with me considering my 780i... however I had great luck with 800mhz unlinked. Still able to keep very tight timings too.

I can do 4.5Ghz, and just barely get a 3Dmark run in before it locks up. I have raised my NB in my bios to as much as +0.275v, FSB +0.25v. There doesn't have to be a load on anything when it happens. Which leaves me to believe its my NB. But ram can cause that al well.

I set my ratio to 1:1 in bios (i have DDR2-1000 ram) so 500x9 i would think wouldn't be a problem. My timings were 5-5-5-15, and the sub-timings to auto. I have to leave those on auto, for some reason if i manually set them, it won't post.

It will do 4.6Ghz, but locks up within a couple minutes, just enough time to get a couple SuperPI runs in

On a side note, i can do 4.6Ghz with 1.44v. And i haven't even tried to see what the lowest possible is for 4.6

[zicada]

Rather unlucky this time...:

Q812A247

E8400 on a Asus Rampage on water. OCZ 9200's at 1202 5-4-4-10 PL7 at 500fsb.

Cant it get stable above 4.2 GHZ

Runs stable at 8*500 at 1.408v / 24C idle, 1.38v / 47C load (Realtemp figures, on water)

Tried 8,5*500, but gave up above 1.55 volts. It would still crash after 2-3 minutes in OCCT.

VID is set as 1,1125 in Coretemp, and 1.2225 in Realtemp/CpuID

Pretty disappointing chip all in all, was hoping for 4,5ghz 24/7

Question:

Is it really true that FSB affects the vcore requirements ? A few of the posters here seem to believe so. Some real life figures would be excellent. 500FSB PL7 really does wonders for the memory I'm using. Does 10700 on all 3 tests in Everest at 45.8ns latency, so I'd really love to stay at this FSB.

Also, what about GTL ? There are only 4 possible settings on the Rampage, ranging from 0.62x to 0.67x. They don't seem to have any immediate impact from what i can tell. Neither does PLL from what little ive been able to test so far.

[ThatGuy16]

I flashed my bios, and that fixed it!!

Finally broke 20k!

[Dagalidis]

I flashed my bios, and that fixed it!!

Finally broke 20k!

Nice run m8...

Are you stable at 4600?

[Hor$eman]

I've been working on getting a run at over 4500 for the last week. Just today I figured out that I am going to try set PLL and VTT manually, as the auto on my mb really ramps these up.

I've been posting mostly in the Striker II Formula thread on this, but will also let you all here know how it goes too.

[ThatGuy16]

Nice run m8...

Are you stable at 4600?

Eh not sure, i didn't really even try and see what the lowest voltage i could use was. That was just for a bench run, but with my chip being such a low voltage chip. I should raise my 24/7 clock, as 4.0Ghz is stable with only 1.216v

Tomorrow, I'm going to try for 4.7Ghz. I can't believe this whole time, all i needed was a bios update to get me past ~510FSB

[Dagalidis]

Some BIOSes relax Chipset Timmings and get able to work on higher FSB but at the same time you loose Performance.

This week i will try some special DDR2 Kit 2X1GB Cellshock, Can do 1247 @ 4-4-4 CL 4 from Hipro5....

[ThatGuy16]

Now that is some awesome ram!!

[zicada]

I actually got my 8400 to run stable at 4250 mhz now at 1.45v. I let the motherboard set FSBt and vMCH automatically.

It turns out the Rampage seems to undervolt FSBt by alot with this chip. Even set at 1.38 in Bios, it would be 1.30 real. Now its at 1.42 real, wich seemed to help alot.

Also, according to Anandtech, loadline calibration should be disabled on the Rampage for E8400. To me that sounds like a load of bull. With it enabled, vCore never budges a notch. I set it to 1.45, and it stays at exactly that under load. Im sure i could get it to run stable at 4500 aswell, but it does seem to require atleast 1.5v under load.

Anyone else have any ideas on Loadline Calibration with these chips, aswell as the FSBt requirements ?

Also would love a reply regarding high frequency CPU overclocking at high FSB's in terms of voltage requirements. Would a lover FSB allow higher CPU clocks ?

Finally, what about the memory enhancement settings on the x38/x48 chipsets ? On Gigabyte cards its called Memory Performance Enhance, and on Asus its called AI Clock Twister. They both have quite substantial impacts on memory performance. I keep AI Clock Twister on Stronger (max setting) on this board. Should this have any effect on the CPU frequency possible ? (when all im doing is say change from 500*8,5 to 500*9, eg only changing ratio)

[diablos]

Hi guys
How do you think about this fpo q74882sd (e8400) ?

thanks

[zicada]

Now that is some awesome ram!!

lol indeed. How about the CPU though!?

[zicada]

Hi guys
How do you think about this fpo q812a247 (e8400) ?

thanks

Its crap. I have the same exact chip. Read my posts on this same page about it. Im sending mine back

[diablos]

Its crap. I have the same exact chip. Read my posts on this same page about it. Im sending mine back

craps
why?

[zicada]

craps
why?

Requires alot more voltage than the good chips you see here. Will not run 4500 unless you put in over 1.5v under load.

[diablos]

Requires alot more voltage than the good chips you see here. Will not run 4500 unless you put in over 1.5v under load.

thanks

[Mykou]

Well most peeps look for how batches perform, you can do with the list what you want, but most users can quick reference the batch with some results ( if we have any ofcourse)

I'm planning to add any 45nm I can get my hands on... peeps can pm me and I will try to keep the list as updated as possible...

oki , gonna finish priming this chip and pm you with .

finally not as good as my former xeon q807 but better than average penryns and better temps too . Gonna keep that one this time lol

4 ghz @1.248v

[Hughyhunter]

Here we go! Older batch: Q746A487 requires more voltage apparently but I'm still happy... just hot!
Of course it is 78 Fahrenheit in here... so not bad IMO.

[Mtrx]

E8500
Q748A212 (testing)

http://img255.imageshack.us/img255/9991/1600iu0.jpg

Nice one, the q6600 needs 1,408 vcore to get stable at 3,5.

[oron_S]

E8500 Q807A
4270 @ 1.38725V BIOS STABLE
DFI X48 LT T2R
anyone knows what's the max voltage for 24/7 on E8500?

[Viss]

E8500 Q807A213 just arrived Hope it likes some FSB.

[quattro_]

what do you guys think of this e8400 batch: q745a741
im about to buy it so please respond soon

[Mykou]

update max fsb on P5K premium air cooling and Q804A249

http://valid.x86-secret.com/show_oc.php?id=364079

[Mtrx]

E8500
Q748A212 (testing@3800)

http://img291.imageshack.us/my.php?image=1602yc6.jpg

[Monstru]

Hmm...could you run a quick FSB test with multi 6?