**Official e8400/e8500 Retail OC Thread

[dissident]

found this on another board.. would be GREAT if everybody would enter results here

http://spreadsheets.google.com/ccc?k...8iPVEYLw&hl=en

[Mav451]

Haha by other board, you mean back one page (also in my sig)?

Probably should update the 1st post, assuming danmoody comes back sometime soon.

[higgins]

Below is my E8400 running on a P5B Deluxe.

I feel my temps are a bit high as compared with yours for water. I however have not done a remount.

Maybe core temp is to blame for temps being off.

What bios are you using?

Your temp too high? hah, youre the one loading at 55/56 while im over 60C almost and im the one using a fuzion compared to your tdx

using bios 1226. ill remount the sucker couple of times, if it doesnt yield lower temps ill order a pa120.3 and add it to my loop

[vera]

Why my cpu is so hot

My cooler is TT big typhoon , Is it normal ?

[barzi]

Same problem here, but not that hot.
Coretemp gives 61C for both cores, but my Tuniq Tower is cold. Everest/PC Probe gives 46C (I know that these are CPU temps instead of Core temps).
But is Coretemp wrong? (using 0.96.1)

Also Core 0 is much better then Core 1. Core 0 can handle 4ghz with 1.24v, while Core 1 need much more(over 1.3 :|). How can this be?

BTW I have an advice, don't stress with gromacs core(orthos). It's useless.
I tested it for 2 hours, and with no problem. But then I started Small FFTs and it went wrong from the 10th second :|.

[ztop]

Why my cpu is so hot

My cooler is TT big typhoon , Is it normal ?

great E8200 .. 4ghz on air?
fpo\batch?

[dogsx2]

Just got a 8400 from Mwave, 745A551. Put it in my Microfly with a P5E -VM HDMI and TR120 UL. Using onboard video to start. Need to update bios but hate to on an Asus mb. Temps are way off. Using Vista 64-bit so no coretemp.

Edit: updated bios but temps are still way off.

[vera]

My latest stability ;

Fpo : Q745A612

[CERO]

Well any comments yet on the chip?
Its been 3 hours you should have had it all tweaked out by now

Hey m8, u are right but unfortunately I am very busy atm, it need to wait till weekend before I got some time to test this sucker, will let u know m8 , Zeus & loco already posted some results of this batch, it seems not a "very spectacular" chip a good E8400 can do the same or better, btw nice chip u got their m8, if my E8500 would do the same I would be happy alrdy

[Supershanks]

Not sure on mine re temps, seems a bit high ??

4230 470x9 1:20 1128Mhz Vcore = 1.3875v on water


Benches 4230 470x9 1:20 1128Mhz Vcore = 1.3875v Benches
480x9

[giorgos th.]

These are the 4g-4.23g-4.3g stable situations with my E8500 Q740A476T on watercooling.
screenshots are within 10' but it went on for a couple of hours.
and my max 32m without any tweaking,just to see what the cpu could do..

[trt740]

Same problem here, but not that hot.
Coretemp gives 61C for both cores, but my Tuniq Tower is cold. Everest/PC Probe gives 46C (I know that these are CPU temps instead of Core temps).
But is Coretemp wrong? (using 0.96.1)

Also Core 0 is much better then Core 1. Core 0 can handle 4ghz with 1.24v, while Core 1 need much more(over 1.3 :|). How can this be?

BTW I have an advice, don't stress with gromacs core(orthos). It's useless.
I tested it for 2 hours, and with no problem. But then I started Small FFTs and it went wrong from the 10th second :|.

it's wrong core temps has a hard time reading these chip some are reporting too low and some too high

[zoob]

Super quick non tweaked results.
First boot was stock speed only to set the BIOS.
Second boot into Windows
Will test for 24/7 stability soon.

[icywater]

here is my

[zizo]

My latest stability ;

Fpo : Q745A612

I have the same temps with the same vcore, but heatsink is cool, so I'm guessing it's a sensor problem.

[zoob]

Hmm think I may have damaged the chip by pushing VTT @ 1.5 ?

I was Prime95'ing at 1.3500v 450x9 for an hour or so before I tried other settings... now I can't Prime95 for 1 min at the same settings without it failing on one core! It now needs 1.375V set BIOS.

[eva2000]

Hmm think I may have damaged the chip by pushing VTT @ 1.5 ?

I was Prime95'ing at 1.3500v 450x9 for an hour or so before I tried other settings... now I can't Prime95 for 1 min at the same settings without it failing on one core! It now needs 1.375V set BIOS.

DFI's digital pwm makes selecting proper vcore more difficult with vid + special vid % method. You can derive the same vcore using different vid + % combinations but they'll result in different levels of stability for prime95 etc.

I'd also double check all your settings to see if they're all the same as before down to memory related settings too.

[Pacha]

Why my cpu is so hot

My cooler is TT big typhoon , Is it normal ?

is your heatsink as hot? if you are used to, and if you have a good contact, may you guess the real temp by touching it, very approximatively?

[BSGOLD]

I hope I'm in the right thread.

My system:

CPU: E8200 Q744A736 cooled by Xigmatek HDT-S1283
Board is: Asus P5K-E Wifi/AP, no mods, bios 1002
Memory: Transcend Axeram DDR800, MicronD9GMH chips
Vcore: 1.45v set in bios
Vddr: 2.0v set in bios
NB: 1.55v set in bios

[Merc14]

Just started working on my chip but the temps are very odd. Here is the data:

e8400
Q746A377 SLAPL
1.225v
Pack date 1/4/08

http://valid.x86-secret.com/show_oc.php?id=305730



It was running P95x2 at 4203Mhz


The odd thing is that it boots at 49c (Tc 29c which seems right from the 3 Core 2s I have owned) 1.19v Vcore 3002 MHz. If I run P95x2 there the temps jump to just 51c. Now, crank up the voltage and freq to 4203Mhz, 1.38v and it boots at 51c and primes at 64c after 15 minutes. This is on water, a 1/2" loop with dual rad and D5 pump that kept a Q6600 real cool at 3402Mhz, 1.41v all day long, so i know it isn't the cooling. Nothing but the CPU on that loop. Reapplied AS5 and same thing. It definitely clocks well and considering the Tj is 100c, 64c at 4.2Ghz under load isn't bad but these temps have me confused. WTF is going on? She boots at 4510Mhz 1.4V which is great. Can't run Pi yet but I haven't tweaked it much there (just installed).

[unclewebb]

There seems to be the usual amount of confusion about temperatures so here's another way to directly access the data from within the Intel CPU.

Start up CPU-Z and go to the About tab and click on the Registers Dump (.txt) button.
Save this file, open it and scroll down to the model specific registers for each of your cores.



MSR 0x0000019C contains the only Intel documented temperature data for these processors. By looking in here you are reading the digital thermal sensors (DTS) directly. Bits [22..16] are located in the third and fourth digit. In my example that is 0x3F hexadecimal which equals 63 decimal.

If you are mathematically challenged then fire up Calc or head to Google and type in:
0x3F in decimal
and it will do the conversion for you.

This shows that my Core0, at idle, is 63 degrees away from TjMax or its safe maximum operating temperature.

I am using an older E6400 which has a TjMax = 85C so CoreTemp reads the DTS data and then calculates that my absolute temperature is 63C degrees away from 85C so it reports an idle temperature of 22C (85C - 63C). CoreTemp is using TjMax = 105C for the new 8x00 series processors.

Intel neither publicly documents that these on chip sensors are accurate for low idle temperatures or provides any public documentation stating what TjMax actually is. It only documents that these sensors are used for thermal throttling and ultimately for thermal shut down if needed.

When your processor heats up the DTS will decrease. When the DTS approaches zero you will begin to slow down due to thermal throttling kicking in but most people are miles away from that ever happening. As long as you always have some headroom as reported by the DTS and your computer is stable at full Prime load then there is no reason to be too worried about your absolute temperature. It is just a number and you are operating within the Intel temperature spec for these chips. At 4+ GHz you might be a little over on that spec but that's a secret that Intel doesn't need to know.

You can also start CoreTemp and go into the Options->Settings menu item and turn on Show Delta to Tjunction max temp.
This setting also reads the DTS data directly and should exactly correspond with the above DTS data that CPU-Z prints out.

[zizo]

unclewebb, that was very informative. Thanks a lot.

[barzi]

it's wrong core temps has a hard time reading these chip some are reporting too low and some too high

So what program is best to use for the temps? Speedfan?

Super quick non tweaked results.
First boot was stock speed only to set the BIOS.
Second boot into Windows
Will test for 24/7 stability soon.

Can someone give me a link where I can download Prime, but for dual core? Like this picture.
On this page:

http://www.mersenne.org/freesoft.htm

I got the Prime95 for single core...

Thanks

[Ron 61]

@ unclewebb If intel does not provide any public documentation stating what TjMax actually is, then from where is it derived?

[HaTaX]

Okay, been pulling a few of my hairs out over this lately.

It seems I didn't get a good one out of the batch. I think my CPU starts needing lots more power over 3.8ghz. At 426x9 ~3.8 I can complete orthos and prime for at least an hour on 1.35v. Once I start heading for the 4ghz line it starts needing VCore to reach stability. To get stable at 446x9~4014 I need 1.44 volts as reported by the hardware monitors, I haven't checked with a DMM yet.

I can boot into windows fine, run my applications, but as soon as I goto Prime it, it makes it about 10 seconds and fails. I have also tried adjusting my CPU VTT and GTLREF settings up and down 1% at a time from 55%-75%. No dice..

Perhaps I've got a bum chip here? How is everyone seeing vdroop affecting their OCs at higher frequencies? I am considering running to Rad-Shack tomorrow to pickup a variable resistor and try to get vdroop under control.

Part of me wonders if it will OC better with a proper BIOS from abit for the wolfdale CPUs?