**Official e8400/e8500 Retail OC Thread

[HDCHOPPER]

4.0 with 1.26 volts ! exellent E8200cpu thier Tuvok-LuR-

[CrazyNutz]

I think I'm on to something, It may be the reason why we think our CPU's are
degrading. I created a new thread check it out here: http://www.xtremesystems.org/forums/...d.php?t=179965
Especially you Mrcape because I really think this is what you are experiencing.

[dark22]

just playing today to see...
Asus doent put lower than 1.1 volts...

[TEDY]

you're lucky on my abit ip35-e lowest is 1.225v bios.

[brinox]

so here is my initial 4GHz OC on an E3110:

http://valid.x86-secret.com/show_oc.php?id=327382

[bellinghamwa]

I am mentally preparing for my FIRST OC as I am still waiting on my E8500 and mobo (either 790i or Asus P5E3 Premium).

Can the E8500 maintain a 1600 FSB with 1.3625v?

Will I need to increase the voltage of the anything else?

[mk-ultra]

my e8400 needs 1.19-1.20v for 400mhz-1600fsb

i doubt you'll need 1.3625

NB will need a bump tho

btw here's an OC screen of my e8400

it's weird no matter if i set 1.325 or 1.33 in the bios it gives 1.312 in windows. But it only did 2h on core 2 @ 1.325

[bellinghamwa]

Thanks!

[Hughyhunter]

I am mentally preparing for my FIRST OC as I am still waiting on my E8500 and mobo (either 790i or Asus P5E3 Premium).

Can the E8500 maintain a 1600 FSB with 1.3625v?

Will I need to increase the voltage of the anything else?

You should be able to set FSB to 1600mhz (set the memory to sync of course with stock timings) and not even touch the voltages on anything. I have mine set to 1800mhz and just barley bumped the NB/SB. You can even set the volts below auto or stock and run at 1600mhz. I cant remember what stock is but I set mine to like 1.26 @ 1600mhz FSB and it was very stable.

[aoch88]

I could only OC my E8200 @ 8 x 502 Orthos Blend stable and nothing more. I'm not sure if it is due to the Foxconn Mars or my Ballistix doing the max. Anyone has an idea what is the max for Ballistix PC6400's? I believe it does 550Mhz 1:1 @ 15-5-5-5? What is the normal voltage required for that to run or it's not possible?

[DoObs]

I could only OC my E8200 @ 8 x 502 Orthos Blend stable and nothing more. I'm not sure if it is due to the Foxconn Mars or my Ballistix doing the max. Anyone has an idea what is the max for Ballistix PC6400's? I believe it does 550Mhz 1:1 @ 15-5-5-5? What is the normal voltage required for that to run or it's not possible?

I've done 620 on those sticks 1:1 a the same timings, I am getting a pair of 1066's tomorrow, see how those scale with my E8400, ive already gotten my chip to 4ghz at 1.2v, and 4.4ghz at 1.4v. Trying to get ahold of DICE for some higher FSB, my board i have done 560FSB so yea ampt to see what my E8400 can scale up to.

[Obitus]

I bumped my voltage every so slightly from 1.225 to 1.25 and I am running 1600FSB no problem.

[aoch88]

Thanks guys but I'm referring to Orthos Blend and the concern is about Vdimm voltage and timings. I can pass Small FFT but just not Blend

[kingcarlos]

can anyone tell me which batch or 8400/8500 are gd for oc and has low temp under load? thanks...am thinking abt buying one to upgrade my 6300

[bellinghamwa]

You should be able to set FSB to 1600mhz (set the memory to sync of course with stock timings) and not even touch the voltages on anything. I have mine set to 1800mhz and just barley bumped the NB/SB. You can even set the volts below auto or stock and run at 1600mhz. I cant remember what stock is but I set mine to like 1.26 @ 1600mhz FSB and it was very stable.

Thanks HH!

Since I am going to use DDR3 1600 PC3 12800, am I correct that I wouldn't "Sync" but still "Link" with a 2:1 divider?

Also, would this change any of the voltage recommendations?

[Hughyhunter]

Thanks HH!

Since I am going to use DDR3 1600 PC3 12800, am I correct that I wouldn't "Sync" but still "Link" with a 2:1 divider?

Also, would this change any of the voltage recommendations?

Oh yeah.... DDR3... Yes you would still link it for max stability. Maybe a 1:1 divider since it's 1600mhz memory. Anything beyond 1600mhz would need a different divider though. I might be confused and could use some input here from others on this thread but doesn't Sync give you 2:1?

[bellinghamwa]

Oh yeah.... DDR3... Yes you would still link it for max stability. Maybe a 1:1 divider since it's 1600mhz memory. Anything beyond 1600mhz would need a different divider though. I might be confused and could use some input here from others on this thread but doesn't Sync give you 2:1?

I thought Sync would clock the RAM at 800MHZ, but Link with 1600 RAM at a 2:1 ratio with a 1600FSB.

[brinox]

I thought Sync would clock the RAM at 800MHZ, but Link with 1600 RAM at a 2:1 ratio with a 1600FSB.

i think your drawing these words too far away from their intended use in our situation.

linked mode refers to the memory speed varying according to the FSB clock speed. in my experiences, sync mode uses the default system clock (333Mhz for a 1333MHz FSB'ed processor) to calculate the memory speed, while link mode uses dividers.


every board manufacturer is going to be different, so its hard to use the terms interchangeably between manufacturers

[Obitus]

Finally got stability at 4.050 9x450 today.

I had to bump vcore to 1.4v
My ram is at 1080 with 5-7-7-22 timings

I've only tested for about 20min in Orthos, but considering that I couldn't get more than 10secs with my old settings, I'm pretty happy. I will try to run a longer stress test to verify stability but it looks great so far.

On a side note, I can still boot and run superPI at 4.203 but fail Orthos almost right away and I don't wanna go over 1.425vcore.

[aoch88]

Finally got stability at 4.050 9x450 today.

I had to bump vcore to 1.4v
My ram is at 1080 with 5-7-7-22 timings

I've only tested for about 20min in Orthos, but considering that I couldn't get more than 10secs with my old settings, I'm pretty happy. I will try to run a longer stress test to verify stability but it looks great so far.

On a side note, I can still boot and run superPI at 4.203 but fail Orthos almost right away and I don't wanna go over 1.425vcore.

You probably need at least 1 hour. My Orthos Blend always fails at 30-40th mins

[Coldon]

So i bought an e8400 yesterday at a premium price, had i waited a few more hours i would have saved a $40. Okay fine, i was an idiot and i rushed, so i can deal with that. So i get it home and put it under water, and run a few test and i'm absolutely horrified to find i have a chip from the worst wolfdale batches yet... a q748

so now i tried to see what i could do with it and this is at follows:

stock voltage : 3.2ghz
1.31v : 3.7ghz
1.408v : 4ghz

not too mention the temps seem crazy: 70degrees under water (and not low end water either) (i even did three mounts to be sure), perhaps in addition to a crap batch, i might have gotten one with a concave base (will check when i get home)... Would that just be swell. All i can do is hope the chip fries and wait three weeks before exchanging it when new batches are coming in. Maybe i can try sell it and just get me a e8200.

So i got it stable now at 4ghz at an insane voltage

vcore 1.424 (vdroop 0.16), all other voltages at default!

One good thing is that during all my testing, i didnt get a single blue screen or failure to post with the mobo, I had it up to 520 no problem. The machine boots into windows everytime no matter the voltage but it just isnt prime stable. Below is my pathetic OC attempt. Sorry my post is a bit annoyed but you can imagine how i feel.

this is on a p35 dk t2rs with 1066 tracers

[Obitus]

That's really not that bad. I can only get 4ghz stable with 1.4v But at 3.6 I only need a very small bump to 1.250. I could brobably run it on stock voltage, but i'd rather have a tad more power.

[techguy2k5]

Finally got new memory in last night, G.Skill PC8000 4GB kit. Man is this stuff fast. With some additional cooling on the northbridge and RAM I'm testing the limits of stability @ 525 FSB and 4.2GHz. I can load Windows and use it normally, but have not yet stabilized serious benchmarking/stress-testing. Was able to get a quick Super Pi 1M run in though - 11.125 seconds. Everest mem speeds were 8.66GB/s copy, 8.5GB/s read, 11.1GB/s write, and 54.5ns latency. I feel like a little more tuning (and an O.S. reload - thanks to earlier corruption) could get things running perfectly at these speeds.

Unfortunately, I've got to pump some serious volts through the various components even for the relative stability I have now. 1.425 Vcore (1.4 in Windows under load), 2.1 Vdimm, 1.57 Vmch, Vich 1.55, Vtt 1.2375, GTLREF @ stock 63%. Also had to raise tRFC to 55 (all other timings auto). I don't think it's a smart idea to raise any of these voltages further on air cooling, except Vtt. I think I can probably tighten some of the sub-timings on the RAM, since I'm only o/c'ing the DIMMs by 5%.

Anyone else have such luck with this board (or any P35 board for that matter)? 525 FSB has surpassed my expectations. If I can get this to be stable I'll be happy, at least until Nehalem :p

No screenies ATM, I'm at work. Will post tonight.

[Mav451]

Sucks that you guys got some ty chips. It does make that one guy who was crowing about "water cooling = better OC (and 0.9 less vcore required)" look like a total fool I think that was back one or two pages now.

Still amazes me how much variability we have between batches, just 2 weeks after mine.

techguy - yeah I would definitely do an OS reload. When I was OCing with my ty Q743 chip, I was BSODing and hard-locking all over the place. Pretty sure XP did not like that one bit.

[aamar]

So i bought an e8400 yesterday at a premium price, had i waited a few more hours i would have saved a $40. Okay fine, i was an idiot and i rushed, so i can deal with that. So i get it home and put it under water, and run a few test and i'm absolutely horrified to find i have a chip from the worst wolfdale batches yet... a q748

Two q748 samples doing 5ghz+:

http://www.xtremesystems.org/forums/...6&postcount=11

Sadly my q748 isnt a performer either. Needs over 1.4v just to get into windows at 4ghz. Will not waste time testing stability at this voltage, but am content with 3.6ghz at 1.23v.