**Official e8400/e8500 Retail OC Thread

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02-14-2009, 12:56 AM
PakaPaka

your E8500 at 4.34GHZ with 1.304 is stable? which mobo?
my temps on 1.336V 4.05GHZ are at load 52 max and with IBT its 66 max at load.

any chance to get 4.5GHZ on air with P5Q Pro on safety Vcore&NB?
02-14-2009, 01:38 AM
R31Nismoid

Quote:

Originally Posted by Falkentyne

Don't keep torturing these chips. Listen to Lee. He keeps telling you guys not to keep torturing these chips like this. Run IBT a couple of times, then just run Orthos Blend/Memtest, and just *use* the computer and enjoy it.

Running these stress tests (that stress the CPU far more than anything else) repeatedly, especially IBT and sometimes prime small fft on hours/days on end, is not really healthy for these chips when they're pushed too hard. Your chip might be degrading from it. Seen it happen plenty enough. One guy degraded from 3.6 to 3.4 ghz (needed higher vcore--1.34 vs 1.32v) for 3.6 after a few weeks of repeated IBT's. And 1.32v isn't even that high.

Yes it's possible for chips to degrade even at lower voltages.
All chips respond differently, so what may happen to 1 person might not happen to someone else. Board timings/settings may play a part too.

There have been cases where it was the northbridge going south, or RAM, but memtest would pick that up (you'd probably need something a bit tougher on the NB to pick up problems there, like Orthos/prime Blend).

Thats exactly what i did though...

Ran IBT for a solid 45mins/1hr and temps were a champ, stable as.
Also did memtest initially etc etc.
And a prime blend overnight etc.

I didn't run a stress test after that. It was only on the stupid hot day here it crashed, and since then not quite the same
And i game on it daily without issue

Im still yet to see if its the ram or the chip, no time to test yet though.
It was fine for what 2 months maybe 3 without problemos and my temps are very low too.
Will do digging tonight perhaps
02-14-2009, 03:44 AM
vrdublu

Quote:

Originally Posted by PakaPaka

your E8500 at 4.34GHZ with 1.304 is stable? which mobo?
my temps on 1.336V 4.05GHZ are at load 52 max and with IBT its 66 max at load.

any chance to get 4.5GHZ on air with P5Q Pro on safety Vcore&NB?

Yes completely stable on the P5Q Deluxe, at the settings I mentioned earlier. I would like a higher FSB though. Need to start testing again soon. I would like something in the 550fsb area with a clock of 4950 @ 1.45 or so, we'll see how she goes.
02-14-2009, 06:08 AM
R31Nismoid

ok so tested the ram over the last 3-4hrs... seems thats not it!
Held the ground fine.

So this time back to near the old settings, slightly lower FSB (470 for now) and will see how it goes
Could just be i need another notch of vcore perhaps for 4.3, so sitting on 1.296 vcore with a lower clock for now
02-14-2009, 10:39 AM
jcniest5

Stupid E8400 again, even E0. Just bought it yesterday and one of the temp sensors is stuck at 39, it goes up a little if I torture it, but otherwise, it's always at 39. Dam...I am beginning to hate E8400! Why do I even want it anyway...?
02-14-2009, 11:51 AM
PakaPaka

Quote:

Originally Posted by jcniest5

Stupid E8400 again, even E0. Just bought it yesterday and one of the temp sensors is stuck at 39, it goes up a little if I torture it, but otherwise, it's always at 39. Dam...I am beginning to hate E8400! Why do I even want it anyway...?

because he is good clocker? :rolleyes:

my sensors are stuck too, if you pass the 50C~ the sensors going to be normal.
02-14-2009, 12:11 PM
jcniest5

Quote:

Originally Posted by PakaPaka

because he is good clocker? :rolleyes:

my sensors are stuck too, if you pass the 50C~ the sensors going to be normal.

No, they never go past 47 even many hours of intense torturing. When tortures, the other non-stuck sensor rises to 39 and then both would go up together. When they cool down, the stuck sensor comes back to stay at 39 while the other one goes down all the way to 32. I haven't tried OCing the CPU yet. I should to see how well (or bad) it OCs. We shall see.
02-14-2009, 06:10 PM
vrdublu

Must be the latest batch of chips because mine also are stuck at 39 at idle. They do go up to 57 load.
02-15-2009, 01:33 PM
frankR

I've had my E8400 rig for over 6 months and just now getting around to trying an OC.

What's a 24/7 maximum safe temp under stress test?

Right now I'm stress testing my E8400/C0 1.33V BIOS 1.28V CPU-Z w/P5Q-E at 400 FSB 3.6Ghz CPU memory G.Skill 2x2GB at 1:1 400 Mhz and I've hit 62 degC on Core0 and 59 degC on Core1 after only 10 min of P95 blend.

Should I try for 3.8 Ghz?

I'm going to try your BIOS settings below. Thanks for posting them. And nice OC. :up:

Edit 1:

Well I booted with your settings but with FSB at 425 without a hitch. Starting stress testing...
Edit 2:

No go at 425, I had an error then a lock-up. Trying 415. Temps got to 67/65. I don't think my fans are running at 2k RPM under load. I'm going to investigate this in the BIOS.

Edit 3:

LOL! I just open my case and realized I was running the stock Heatsink and Fan. I had trouble fitting the TT "super" Sonic Tower on the CPU so I just slapped the Intel unit on.

I think a cooling upgrade is in order before I go beyond 3.5 Ghz.

Edit 4:

Max temp with the Super Sonic Tower 1.328V CPU-Z 400 FSB is 40/39 degC. That's more like it.

Edit 5:

Two hours into 3.8Ghz, no errors...

Quote:

Originally Posted by PakaPaka

for the 4613mhz i don't have the settings, but for the 4054mhz stable 24/7 i do.
those are the setting:

Ai Overclock Tuner : Manual
CPU Ratio Setting : 9
FSB Frequency : 450
PCIE Frequency: 100
FSB Strap to North Bridge : Auto
DRAM Frequency: 901MHZ
DRAM Timing Control: 5-5-5-15
DRAM Static Read Control: Disabled
Dram Read Training : Disabled
MEM OC Charger : Disabled
Ai Clock Twister : Auto
Ai Transaction Booster : Auto
CPU Voltage : 1.3500V in bios, 1.366V at load, 1.328V at idle.
CPU GTL Reference: Auto
CPU PLL Voltage : 1.52
FSB Termination Voltage: 1.26
DRAM Voltage : 2.10
NB Voltage : Auto
PCIE Sata Voltage: Auto
Load Line Calabration : Enabled
CPU Sread Spectrum : Disabled
PCIE Spread Spectrum : Disabled
CPU Clock Skew: Auto

its for IBT 5 run 100% stable, at OCCT pass 5 hours with Vcore 1.328V at load.
02-16-2009, 03:11 PM
frankR

Okay, I'm 2hr of P95 and IBT stable with these settings, from PakaPake, Thanks. I can boot Windows at 4Ghz but after only a few seconds P95 fails. IBT loaded both cores to 60 C, surprisingly much higher temps then P95, but my temps seem to be good.

Ai Overclock Tuner : Manual
CPU Ratio Setting : 9
FSB Frequency : 423
PCIE Frequency: 100
FSB Strap to North Bridge : Auto
DRAM Frequency: 846MHZ
DRAM Timing Control: 5-5-5-15
DRAM Static Read Control: Disabled
Dram Read Training : Disabled
MEM OC Charger : Disabled
Ai Clock Twister : Auto
Ai Transaction Booster : Auto
CPU Voltage : 1.3500V in bios, 1.366V at load, 1.328V at idle.
CPU GTL Reference: Auto
CPU PLL Voltage : 1.52
FSB Termination Voltage: 1.26
DRAM Voltage : 2.10
NB Voltage : Auto
PCIE Sata Voltage: Auto
Load Line Calabration : Enabled
CPU Sread Spectrum : Disabled
PCIE Spread Spectrum : Disabled
CPU Clock Skew: Auto

I'd like to try for 4Ghz stable. What should I do next? Just keep bumping Vcore? Should I also bump NB voltage, or any of the other voltages? Any help would be appreciated. Thanks!

http://i415.photobucket.com/albums/p.../38_1336_1.png
02-23-2009, 08:32 AM
BooStFeD

Received another E8400 from Newegg

Batch# = Q843A789

Pack Date = 1/27/09

Anyone playing with one of these yet?
02-27-2009, 12:32 PM
xMrBunglex

messing around with my Gigabyte DES stuff to see how low it would go.

E8400 @ stock 333x9 w/ C1E enabled
Batch# Q837A218
Packed 12/8/08

vCore 1.056 idle/1.104 load
loads in mid 30's on air in a 17° room, idles low 20s
CPU draws <6 watts idle and around 20 watts running Orthos

http://i21.photobucket.com/albums/b2...yteDEShigh.jpg

now i'm testing the lowest vcore i can run stable at 4.0 GHz. i'll screenhot when i have something worth sharing.
02-27-2009, 01:06 PM
PakaPaka

frankR, try this settings:

Ai Overclock Tuner : Manual
CPU Ratio Setting : 9
FSB Frequency : 445-450
PCIE Frequency: 100
FSB Strap to North Bridge : Auto
DRAM Frequency: 890MHZ-900MHZ
DRAM Timing Control: 5-5-5-15
DRAM Static Read Control: Disabled
Dram Read Training : Auto
MEM OC Charger : Auto
Ai Clock Twister : Auto
Ai Transaction Booster : Auto
CPU Voltage : 1.3500V in bios, 1.336V at load, 1.328V at idle.
CPU GTL Reference: Auto
CPU PLL Voltage : 1.52-1.56
FSB Termination Voltage: 1.26
DRAM Voltage : 2.10
NB Voltage : Auto
PCIE Sata Voltage: Auto
Load Line Calabration : Enabled
CPU Sread Spectrum : Disabled
PCIE Spread Spectrum : Disabled
CPU Clock Skew: Auto
02-27-2009, 08:52 PM
R31Nismoid

Quote:

Originally Posted by xMrBunglex

messing around with my Gigabyte DES stuff to
vCore 1.056 idle/1.104 load
loads in mid 30's on air in a 17° room, idles low 20s
CPU draws <6 watts idle and around 20 watts running Orthos

Quote:

Originally Posted by CandymanCan

Mrbungle, stock speeds the cpu is always cold.. Try upping to 4ghz and you'll be amazed how much hotter the thing gets lol

Yeah mine sits around 36-43 @ idle (22 degree room) and that's sitting @ 4.3ghz and a vcore thats a bit higher... Load is 48-50 degree
All things considered compared to those results mine are pretty decent temps
02-27-2009, 09:14 PM
Falkentyne

vFSB above 1.14 will NOT necessarily damage a cpu unless you take it too far. 1.20 is perfectly safe and some older boards won't even go below 1.20, so that's stock for those boards. 1.30vfsb is when you start to get into overclocking territory. Zero danger in using 1.20 vfsb.

I do agree that you shouldn't need high vfsb settings unless you're trying to go above 400 mhz.
02-27-2009, 09:18 PM
R31Nismoid

ooo correction - 48-50 under load - sorry i meant @ idle (ive edited to reflect correctness! hehe)
And its 36-43... 2hrs sleep isnt my friend :D
02-27-2009, 11:39 PM
Falkentyne

Either is fine. 1.24v will not harm you in the least.
I would personally not go above 1.30v, though.

Being scared of 1.20 vfsb is like being scared of putting 1.30v into a 1.25v cpu...
02-27-2009, 11:50 PM
Jodiuh

I have a similar chip. It lives on @ 1.2V 4Ghz. Needs about 1.35V for 4.4Ghz. Not worth the extra heat output IMO.
02-28-2009, 04:02 AM
xMrBunglex

Quote:

Originally Posted by CandymanCan

Mrbungle, stock speeds the cpu is always cold.. Try upping to 4ghz and you'll be amazed how much hotter the thing gets lol

i wasn't talking about 4 GHz. i was talking about running Orthos @ 20 watts.
02-28-2009, 04:59 PM
frankR

CandymanCan / PakaPaka,

I think you're right about having a poor E8400/CO. I couldn't get stable anywhere near 4 Ghz. I've settled on 3.6 Ghz @ 1.272 Vcore for a 24/7 running, which is more then enough HP to run a web browser...

The highest setting in the BIOS for tRAS is 31. The only setting that goes to 65 is tRFC. I think my memory is unstable much above 400 Mhz.
03-01-2009, 02:03 AM
xMrBunglex

my E0 runs better at low voltage than my C0 did, but it doesn't seem any better at or above 4.0 GHz. in fact, i think my C0 was a better clocker. i'll put up more when i do the work. for now, 425x9 @ 1.200 vCore load is stable.

http://i21.photobucket.com/albums/b2...1-200vcore.jpg

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