**Official e8400/e8500 Retail OC Thread

[laragirl83]

mine does the some but I only tried to 1.368v but it failed within a minute in prime...
at 4500mhz...
how much cpu vtt do u use az 4545mhz?

Beszivárgunk ide is lassan

[subaruwrc]

Beszivárgunk ide is lassan

úgy néz ki.

[HDCHOPPER]

how about E5200 anybody know if batch # 3827A341 any good ???
couldnt resist Fry's had em for 109 bucks with a pos ecs mobo

[misho]

how about E5200 anybody know if batch # 3827A341 any good ???
couldnt resist Fry's had em for 109 bucks with a pos ecs mobo

OC the out of it.!!

[zoob]

What to do if my CPU is Small FFT stable for many many hours but fails Large FFT after 45 min? I've bumped up my vDDR, vNB, loosened timings, raised PL... quite frustrating
I did some searching and people say it's indicative of the memory being unstable, but I'm running my 4GB GSkill DDR2-1000 PQ slower than rated as well. Looking for general information and will post settings shortly.

[HDCHOPPER]

OC the out of it.!!

you know it ! hahahaha just got my pot too
dice on it soon hot dam 12.5 multi here eye come

[misho]

What to do if my CPU is Small FFT stable for many many hours but fails Large FFT after 45 min? I've bumped up my vDDR, vNB, loosened timings, raised PL... quite frustrating
I did some searching and people say it's indicative of the memory being unstable, but I'm running my 4GB GSkill DDR2-1000 PQ slower than rated as well. Looking for general information and will post settings shortly.

IF that is a e8500 c0 u overclocking, tell me ur Vcore and all the other voltages PLZ thanks!

[punx223]

mine from microcenter C0 stepping unfortunately bought at microcenter when they were considerably more expensive

will do 9x450 fsb 4.05 ghz at 1.256V on water

and 5.3 ghz at less than 1.6v on ss

5.5 at 1.6v maybe a touch more on ss

http://valid.x86-secret.com/show_oc.php?id=438653

will be making DICE runs soon

heres the box pack date/batch

[radaja]

heres my 24/7.

[FabricioGS]

Guys, help me out here please.

Is this ok for 24/7?

4250MHz (533x8)
vCore = 1.35000v
CPU GTLs = Auto
CPU PLL = 1.54 (or 1.56, don't remember)
FSB = 1.30v
DRAM = 2.10v (1:1) @ 5-5-5-15
NB = 1.28v
NB GTL = Auto
SB = 1.20
PCIe SATA = 1.60
CPU/NB Skew = Normal
All the rest: Auto

I guess the vcore is fine, but what about the 533 fsb and other volts? Is it too high for 24/7? I like high fsbs

I'm either using this config or like radaja is using (500x8) but with a 533 fsb I can use my mems 1:1.

[Badge56]

Purchased a E8400 OEM a few months back. Will run 24/7 at 4100 mgz but not 100% stable..... 100% stable at 4050 mgz 1.32 V
Great chip for the price.

Running on older 680i EVGA board with old Corsair Hydrocool.

[SimpleTECH]

Guys, help me out here please.

Is this ok for 24/7?

http://img517.imageshack.us/img517/9...vbiosstob1.png

I guess the vcore is fine, but what about the 533 fsb and other volts? Is it too high for 24/7? I like high fsbs

I'm either using this config or like radaja is using (500x8) but with a 533 fsb I can use my mems 1:1.

That is perfectly fine. IMO, anything under 1.40V is considered 24/7 worthy.

Just make sure you keep account of your temperatures, that's all.

[LagunaX]

Purchased a E8400 OEM a few months back. Will run 24/7 at 4100 mgz but not 100% stable..... 100% stable at 4050 mgz 1.32 V
Great chip for the price.

Running on older 680i EVGA board with old Corsair Hydrocool.

That is a typical/good result for an older C0 e8400 - 4.05ghz required 1.32-1.34v for my older C0's that I sold. You probably will need 1.35-1.37v for 4.1ghz stable which might not be worth the extra heat for the extra 0.05ghz.

[misho]

OK Guys I have a question about FSB vs multiplier..
So What is faster?

500mhz x 8 = 4Ghz OR
444Mhz x 9 = 4Ghz ?

Is it the same performance with less multipliers ? or does it loose its performance even at the same CPU frequency?
Help ! thanks

[punx223]

OK Guys I have a question about FSB vs multiplier..
So What is faster?

500mhz x 8 = 4Ghz OR
444Mhz x 9 = 4Ghz ?

Is it the same performance with less multipliers ? or does it loose its performance even at the same CPU frequency?
Help ! thanks

the higher fsb with lower multi will net you better performance, as the memory is tied to the bus speed.... so as the bus speed increases the whole systm speed increases

[LagunaX]

Punx223 is correct but motherboards, ram, and northbridges are funny - some will be stable at a 9x multi and not at an 8x, etc.
Take the highest stable overclock you can get - it will probably be with the higher multi.
If it is the same ghz, then of course take the lower multi/higher fsb.

[misho]

the higher fsb with lower multi will net you better performance, as the memory is tied to the bus speed.... so as the bus speed increases the whole systm speed increases

REALLY? So it will be better for games (higher FPS)? and what about encoding etc?

Edit: also what is the limit for my memory anyway? Its OCZ Reaper HPC 2x1GB DDR2 8500 .. Right now its running at 2.1V, 1770Mhz, fully stable and passes memtest. How much can I go with this memory?
Edit2: ALso mobo is BIOStar Tpower I45, so that can handle high FSB

[punx223]

REALLY? So it will be better for games (higher FPS)? and what about encoding etc?

Edit: also what is the limit for my memory anyway? Its OCZ Reaper HPC 2x1GB DDR2 8500 .. Right now its running at 2.1V, 1770Mhz, fully stable and passes memtest. How much can I go with this memory?

theres no way to say for sure what your ram will do.... only testing will tell...

not to mention you will wanna run memtest to make sure your not getting small failures....

even though your memory seems stable it may have small failures you wont see until deep into a good scene on your favorite mp game and she freezes, or BSOD on you

not to mention you dont wanna deal with the corruption if the memory is unstable

like laguna said.... it all depends on teh board though.... you will have to figure out what your board likes...

also some boards like certain ram better than others

[zlojack]

There is one setting you're forgetting about: tRD

You can have a nice high FSB with a low multi and get higher latency due to a high tRD (Performance Level) which can offset any gains from more bandwidth.

[punx223]

There is one setting you're forgetting about: tRD

You can have a nice high FSB with a low multi and get higher latency due to a high tRD (Performance Level) which can offset any gains from more bandwidth.

so very true.. without it tweaked right you will not gain from the extra bandwidth.... thank you zlojack

[misho]

so very true.. without it tweaked right you will not gain from the extra bandwidth.... thank you zlojack

Yea so I will have to tweak and test the memory timings etc..
Will do that tonight once I get home and unplug my harddrives..

[FabricioGS]

That is perfectly fine. IMO, anything under 1.40V is considered 24/7 worthy.

Just make sure you keep account of your temperatures, that's all.

Thanks SimpleTECH. Temps are ok. Now i'll try to find the higher clock with 1.40v set. I'm loving this chip

[YMAA]

Here's my E8400 E0, batch Q826A399, week 08/13/08.



Folded all night at this speed. And here's a validation:

http://valid.x86-secret.com/show_oc.php?id=439932

Might try for a higher clock later today.

[misho]

Here's my E8400 E0, batch Q826A399, week 08/13/08.



Folded all night at this speed. And here's a validation:

http://valid.x86-secret.com/show_oc.php?id=439932

Might try for a higher clock later today.

OMFG SEE LOOK AT THIS GUYS ! 1.312V at 4.5Ghz E8400!

Why can't I have that :

[FabricioGS]

Here's my E8400 E0, batch Q826A399, week 08/13/08.



Folded all night at this speed. And here's a validation:

http://valid.x86-secret.com/show_oc.php?id=439932

Might try for a higher clock later today.

I can post like this too but.. is it stable?