Changed from E6550 to QX6850 = Poor Overclock

[Junimrox]

Hi everybody!
I need help!!!!
I had an E6550 on a Gigabyte P35C-DS3R, it was working like this:
from 2.33Ghz to 3.5Ghz (7x500Mhz) - Stable at Linx Max memory 20 passes
with my PC9200 memos at 1000Mhz(PC8000) 5-5-5-18

I got an used, lapped QX6850 and now I can't even reach 3.5Ghz linx stable.

The fastest config I can use is 8X425 = 3.4Ghz with 1.38750V on BIOS, 1,328V in CPU-Z

Please can somebody help me?
it's very annoying to overclock 4 times less (50% to 13%) a 10 times more expensive processor...

Thanks!

[Kurz]

Hi everybody!
I need help!!!!
I had an E6550 on a Gigabyte P35C-DS3R, it was working like this:
from 2.33Ghz to 3.5Ghz (7x500Mhz) - Stable at Linx Max memory 20 passes
with my PC9200 memos at 1000Mhz(PC8000) 5-5-5-18

I got an used, lapped QX6850 and now I can't even reach 3.5Ghz linx stable.

The fastest config I can use is 8X425 = 3.4Ghz with 1.38750V on BIOS, 1,328V in CPU-Z

Please can somebody help me?
it's very annoying to overclock 4 times less (50% to 13%) a 10 times more expensive processor...

Thanks!

Updated your bios correct?

It could be the fact that your 775 motherboard wasn't designed to take a Quad Core efficiently. I would check to see how many power phases it has.

[Kal-EL]

Try a higher multiplier. 12 usually runs great.

[Junimrox]

Kurz
The bios is the newest, F12, and QX6850 is supported since F9, so i think that's ok... the mobo supports even QX9770 so i believe it should hold a qx6850...

Kal-EL
I thought I should try lowering the multiplier to get a higher fsb and more performance (assuming my mobo can hold a 500FSB as I used before), but now that you mentioned it I will make some tests with 12X...


A screenshot for it running at 9X378:



thanks all for the help, i'm doing some linx testing so it will take some time... but i'll answer in the mean time

[Kal-EL]

If you catch a good lead on your current overclock, the lower fsb should be offset by the final clock speed.

[Junimrox]

tried to use 12X but no success, it didn't even boot, had to clear cmos every time, i tried 3 times... highest multiplier i can use is 11 and now i'm testing 318Mhz fsb = 3498mhz... Honestly i'm disapointed and kind of lost, i believe wither the mobo or proc is limmiting overclock, but I can't define which one is causing problems.

[Kal-EL]

What vc0re you at?

Reference screeny with some cool h2o http://hwbot.org/community/submissio...ghz_9sec_420ms
1.465vCore 400x11 =4400mhz

[Junimrox]

I'm using 1.425 on bios but cpu-z reports 1.35

[Leeghoofd]

You noticed ya temps at only 3.4 ? 80°C , you got a hottie there...

[zsamz_]

I'm using 1.425 on bios but cpu-z reports 1.35

on load it will drop even more around 1.28
you need 1.5v in bios

[Junimrox]

Yeah... I'm going to stick with 1.425V in bios, it's already getting too hot, 15-20 from TJ max.

My ambient temperature is 25ºC, idle temp around 50ºC and full temp around 83ºC using a TJmax of 100 in realtemp.

After all the afternoon testing I decided to go with 8x425 for now. I'll try to optmize some parameters but i gave up already.
My main goal in changing processores was to have a great gain in performance and it happened, i went from 24Gflops to 44Gflops in Linx and the same video got it's conversion time lowered in 33%.(12 to 8 minutes)

I'm sad that i can't overclock more because of extreme heat generated, but i'm not going to spend more money on this build unless something fails.

[Junimrox]

Now i started lowering voltages, one by one I will test what I really need to keep it stable. since I can't have a higher frequency I will have low voltages...

[zsamz_]

the biggest problem with that board is voltage instability
better board wouldnt need so much voltage

[PatRaceTin]

Ahh yes Q & QX6000 series need some good mosfet board

[Junimrox]

I noticed a very weird thing, now ehwn I first turn on the computer it immediately(2 seconds) turns off, and then when i try again it turns on as normal... could this be an issue with voltages not beign stable enough at start up?

[Leeghoofd]

euh when doing a cold boot isn't that normal behaviour for these intel boards ? wasn't it related to a strap setting

[Boulard83]

+1 for a better board. A good P45 should leed you to a better OC and stability. + a good cooling !

[Junimrox]

euh when doing a cold boot isn't that normal behaviour for these intel boards ? wasn't it related to a strap setting

its normal?

strap setting?
never heard of it, should i know about it?

[unclewebb]

You might want to give ThrottleStop a try. Right click on it and select Unlock Max FID/VID and it should give you access and let you adjust your CPU multiplier from within Windows. It might help your overclocking efforts if you can boot up with a lower multi and then increase it when in Windows.

ThrottleStop 2.84
http://www.fileden.com/files/2008/3/...rottleStop.zip
http://www.mediafire.com/?zdp17yqe71v2u97

RealTemp 3.59.5
http://www.mediafire.com/?vc6w5frn1gclpu9

[Junimrox]

You might want to give ThrottleStop a try. Right click on it and select Unlock Max FID/VID and it should give you access and let you adjust your CPU multiplier from within Windows. It might help your overclocking efforts if you can boot up with a lower multi and then increase it when in Windows.

ThrottleStop 2.84
http://www.fileden.com/files/2008/3/...rottleStop.zip
http://www.mediafire.com/?zdp17yqe71v2u97

RealTemp 3.59.5
http://www.mediafire.com/?vc6w5frn1gclpu9

what an honor, unclewebb is in my post!
Thanks dude, i'll give it a try, i quickly read the official thread of this software but thought it was only for dual cores.


btw realtemp shows a 12 multipler when i set 11 in bios, I think there might be a bug, but it's only with 11 reporting 12, from 8 to 10 no problems...

[unclewebb]

Some software gets screwed up when changing the multiplier and some bios versions are probably screwed up too. I bought a QX9650 earlier this year for testing purposes so hopefully both of the programs I posted above will show your multiplier correctly when in Windows. If you have any problems at idle, that's usually a sign that your C1E state needs to be adjusted or your Minimum processor state in the Control Panel - Power Options is not set to 100%.

ThrottleStop is a handy multi-purpose tool and works very well with Core 2 and Core i, mobile and desktop CPUs and has a few features that no other free software currently has. I'm sure Intel has some good software hiding somewhere but they don't like to share the good stuff.

[Junimrox]

i tested throttle stop and it doesn't allow me to raise the multiplier, i'm currently using 8 and the only available options are 6,7 and 8.

[Junimrox]

Another thing everytime I turned the computer on it would quickly turn off and then turn on again normally, but I made it stop by changing the memory multiplier from 2.5 to 2.4... memory is slower but it was a PITA...

[spynoodle]

Athlough I think it's time for a new motherboard, I also think that your CPU is just unlucky. You might have gotten one from a bad batch or something.

[Kurz]

Athlough I think it's time for a new motherboard, I also think that your CPU is just unlucky. You might have gotten one from a bad batch or something.

Thats what I thought too.
I bet its the motherboard not able to overclock a Quad core with the extra power requirements.
Its only 3 phase I believe, In comprison a Rampage III uses 8 phase for CPU.