**Official e8400/e8500 Retail OC Thread

[Retro]

Never seen one. Is it a mysterious chip?

The reason, or origin for the "T" on these codes is mysterious, as nobody has volunteered any information on why they used this letter in some of their early batch codes. Intel will not say anything. I got mine from NCIX when the E8400's were first available.

[Xvys]

E8400 Q740A555T@4005MHz 445x9@1.344v

I've got the exact same batch as yours Retro, and running at the same 445x9 @ 1.344v (1.365v iln bios, load line calibration enabled). Most of the "T" 8400's were sold in Canada and Australia. Perhaps the T stands for "tested", as both my sealed retail units (Same batch, I RMA'd my first one due to stuck temp diode) had scratches on the back where they had obviously been pre-tested at Intel (...nope, this one sure ain't no E8500

nope L740Axxx "T" 4.5ghz @ 1.5v seems good. I dunno spectacular, but I've hit 4690 bench stable @ 1.55v.

I hit 4610 @ 1.55v with my "T", but not exactly "bench stable" for more than a short period.

One thing which concerns me is my L2 cache latency of 4.0ns @ 445FSB x 9? I think mine used to be 3.4ns before, using the same Everest Ultimate latency benchmark? Has my cpu degraded, or is this 4.0ns L2 cache latency consistent with other users at 4.0GHz?

[garson]

What are good batches for E8200?

[necron66]

It was a nice cool day here in Sydney yesterday, 19C room temps for a change, so I was able to get this:

[Retro]

I've got the exact same batch as yours Retro, and running at the same 445x9 @ 1.344v (1.365v iln bios, load line calibration enabled). Most of the "T" 8400's were sold in Canada and Australia. Perhaps the T stands for "tested", as both my sealed retail units (Same batch, I RMA'd my first one due to stuck temp diode) had scratches on the back where they had obviously been pre-tested at Intel (...nope, this one sure ain't no E8500


I hit 4610 @ 1.55v with my "T", but not exactly "bench stable" for more than a short period.

One thing which concerns me is my L2 cache latency of 4.0ns @ 445FSB x 9? I think mine used to be 3.4ns before, using the same Everest Ultimate latency benchmark? Has my cpu degraded, or is this 4.0ns L2 cache latency consistent with other users at 4.0GHz?

I agree with your findings. I've bumped my 24/7 settings up from 4005MHz to 4200MHz to see how it fares. I just put in a set of Team Xtreem PC2-8000 which I got from TankGuys for $70. At NCIX, the same set is $436 They have got to review their Team pricing.
I have booted into Windows at 500x9, but needed 1.47500v. and it wasn't anywhere close to stable. I don't know about the degrading cache thing, will have to see what mine shows in Everest first.

[Leeghoofd]

It was a nice cool day here in Sydney yesterday, 19C room temps for a change, so I was able to get this:

Good job Necron can you share me the batch nr plz I'm gonna get some dual core loving too... Now boost those 3dmark scores mate !!!

[ban916]

Here is a high overclock all on air and 3d mark06 with my 8800gts 512. I will post up the difference when I get the 9800gx2 for everyone to see... I know thats high volts for the chip it is for one run and is running fine still. Temps averaged 58C on load. Not a bad score for one 8800 gts. I think I can push it to 4.8 all air but don't want to buy a new quad core just yet.

[Furiøùs]

Couldnt get past 445x9.0 so i skipped to 500x8.0, that worked great so now im doing 512x8.0 which gives me 4.1GHz, at 1.450 vCore set in bios, gives me 1.42 on idle, 1.38-1.39 underload.. not bad at all, pretty happy with my chip, and this board pwns. Gonna try to take it further next week, Easter tomorrow


Happy easter all

[Fguarezi]

Q745A551

Super PI 1M and NC - 4500mhz




Prime 4050 1.296v




Prime 4005 1.280v

[tranceaddict]

Here is a high overclock all on air and 3d mark06 with my 8800gts 512. I will post up the difference when I get the 9800gx2 for everyone to see... I know thats high volts for the chip it is for one run and is running fine still. Temps averaged 58C on load. Not a bad score for one 8800 gts. I think I can push it to 4.8 all air but don't want to buy a new quad core just yet.

Wonder why I get a higher score than you with lower OCs, perhaps it's Vista.



BTW, you GF looks cure.

[tranceaddict]

Here is my 24/7 setup:

[necron66]

Good job Necron can you share me the batch nr plz I'm gonna get some dual core loving too... Now boost those 3dmark scores mate !!!

Hey mate,

Would that be FPO/BATCH# that you want?

FPO/BATCH#Q746A377

I got a PB with this on air yesterday also in 3D05,sp1M and sp32M but had loads of probs on the other 3D tests, I was only running the 3870x2 tho yesterday. Do you think this dual would be better for most 3D testing in comparison to the Q6600 I have?

4500mhz dual Vs 3850mhz quad.

[Grnfinger]

After converting the Maximus to a Rampage, priming 4500 now

[Infa]

Nice cpu's you got there you 3 last people...

And all running Asus , that must say something...
my gigacrap sucks on this wolfdale... hopefully premium will cure that

regards.

[trt740]

If anyone sees a link that has them instock in the USA send it my way.

[Leeghoofd]

Hey mate,

Would that be FPO/BATCH# that you want?

FPO/BATCH#Q746A377

I got a PB with this on air yesterday also in 3D05,sp1M and sp32M but had loads of probs on the other 3D tests, I was only running the 3870x2 tho yesterday. Do you think this dual would be better for most 3D testing in comparison to the Q6600 I have?

4500mhz dual Vs 3850mhz quad.

Pretty sure 01 03 and 05 will improve... 06 needs pure CPU power... not sure for Aquamark if it gets more boost from more then 2 cores...

[necron66]

Pretty sure 01 03 and 05 will improve... 06 needs pure CPU power... not sure for Aquamark if it gets more boost from more then 2 cores...

I still might to a board swap next week and try the crossfireX on the dual ~4500mhz. Damd vista tho :/

[Elton523]

So normally E8400 can hit 4.0GHz with stock voltage no problem?

[Big Lar]

So normally E8400 can hit 4.0GHz with stock voltage no problem?

No. Just about everyone needs to add volts to get to 4.0, unless under Extreme cooling.

Larry

[clokker]

No. Just about everyone needs to add volts to get to 4.0, unless under Extreme cooling.

Larry

I don't think the cooling has much to do with it...you're gonna need voltage no matter how you cool.

Seems like a fair percentage of these chips can hit 3.6GHz (i.e., 9 x 400) on stock volts though...it would bode well if yours can do that.
Above 3.6 it becomes a crapshoot...mine hit 8 x 500 on only 1.275v while others seem to struggle for 4GHz even with much higher juice.

[RunawayPrisoner]

Mm... I'd just like to add my E8400 to the crowd. Here's the fastest SuperPI 1M on air I could ever do:



And here is a 3DMark06 screen of the 8800GTS G92 that I have:



And... this used to be my 24/7 rig. Now the CPU changed. :p

[dnottis]

So normally E8400 can hit 4.0GHz with stock voltage no problem?

no, but you should hit 4.0 at or below 1.4v, 3.6 on stock

[IcemaN22]

My new E8400 has the batch: Q802A492
Has someone tested it or have some results of the Q8's? I dont want to open the box before I know this is a good batch

[Psitech]

Here is a screen shot of mine.

[jcniest5]

My new E8400 has the batch: Q802A492
Has someone tested it or have some results of the Q8's? I dont want to open the box before I know this is a good batch

Good luck testing it. You will be the one who will let us know if it's a good OCer batch or not! So, take out your blade and slice the box open. Go ahead, do it. HHehhehe...have fun!