My E6750 Overclock 3.4 1.25V

[douglatins]

I achieved 3.6 at 1.325V also but temps where 65~, think too high
So i booted this clock and load temps are 58~ are this voltages too low? My memory are running at default 1066, should i stick with 1:1?

Any comments criticism? Because I don't want top wait a long Prime run.

Cooling Stock HSF

My rig
P5Q Deluxe 0605BIOS
Dominator 1066
4870X2
HX620 Corsair

[Kursah]

What's the rest of your rig? Have you filled out your system specs? (Located in User CP, at the top, select to ALLOW TO SHOW, see mine for an idea of what to fill out with what info..many ways to do it tho).

What are you using to read temps? What are you using to get load temps? What kind of cooling are you using OE? Aftermarket? What are you using to find voltage at idle/load?

Really that's not too shabby imo, those are good chips, 65C won't kill it, pretty warm tho. I recommend using Realtemp to read temps tho:

http://www.techpowerup.com/realtemp

[douglatins]

Using realtemp
Today is kinda cold, so i think it would increase tomorrow i guess
I had a 9700NT, but sold it waiting for a future uncertain Nehalem upgrade and socket 1366 HSF

[Kursah]

How long did you let prime run? You could get OCCT and run that for it's 1 hour stress test...I like to run Prime blend also to ensure system stability beyond CPU stability.

What FSB are you using to attain your OC? 400 @ 1:1 would be DDR800..so you'd need to be at 533FSB to reach 1066 on your RAM...that shouldn't be a big deal.

What cooling are you using? It's a decent OC, I would say enjoy it!

[douglatins]

Im using 425*8 FSB, but my memory i set it to default 1066, or is it better to set it 1:1 meaning 850MHZ?
Prime its still running only 15min
And could you explain this OCCT Pls?

[Kursah]

Well at 850 you could run tighter timings...I'd just leave it at 1066 if that's what it's running and rated at. It's not hurting anything...at 850 with 4-4-4-12, the results would be similar to 1066 at 5-5-5-15 so relaly no sense in messing with it.

[douglatins]

You seem to have the same board as I, should i upgrade bios? and what about these OCCT?

[farlex85]

Stock cooling? You could see if your board does 533 fsb ok, and then keep a 1:1 ratio, although it won't matter too much, higher fsb seems to help a bit though w/ some things. My 24/7 w/ 6750 is 515x7 (3.6) @ 1.350v in the BIOS, although it ends up about 1.3 in windows most of the time. Is your VID 1.25?

[douglatins]

Originally Posted by farlex85

Stock cooling? You could see if your board does 533 fsb ok, and then keep a 1:1 ratio, although it won't matter too much, higher fsb seems to help a bit though w/ some things. My 24/7 w/ 6750 is 515x7 (3.6) @ 1.350v in the BIOS, although it ends up about 1.3 in windows most of the time. Is your VID 1.25?

My VID was left at auto, an about the multiplier, i see you are running it at 7, is there any improvements of Higher FSB and lowering Mult?
And my temps were getting higher at 3.6 with 1.325V like 65~

[farlex85]

Originally Posted by douglatins

My VID was left at auto, an about the multiplier, i see you are running it at 7, is there any improvements of Higher FSB and lowering Mult?
And my temps were getting higher at 3.6 with 1.325V like 65~

So yeah I'm assuming your on stock cooling if your temps were getting that high w/ that little voltage, and yeah it seems 1.25 is your default voltage, which is quite good. I'll bet that chip can do about 4.2 or so on good air. The fsb is the chokepoint for which the cpu is divided from the rest of the system, so the higher it is the better (within reason of course), and things seem a bit faster to me w/ it up, but I haven't tested the numbers. If you can do 533 w/o raising the voltage, I'd say might as well as long as your temps stay good, if not then perhaps a little lower, 500 should at least be attainable.

[douglatins]

Originally Posted by farlex85

So yeah I'm assuming your on stock cooling if your temps were getting that high w/ that little voltage, and yeah it seems 1.25 is your default voltage, which is quite good. I'll bet that chip can do about 4.2 or so on good air. The fsb is the chokepoint for which the cpu is divided from the rest of the system, so the higher it is the better (within reason of course), and things seem a bit faster to me w/ it up, but I haven't tested the numbers. If you can do 533 w/o raising the voltage, I'd say might as well as long as your temps stay good, if not then perhaps a little lower, 500 should at least be attainable.

Im running stock cooler, because since its the last era of LGA775 i guess im waiting for a 775 1366 compatible one

And to see if its stable what other test should i run?

[farlex85]

Originally Posted by douglatins

Im running stock cooler, because since its the last era of LGA775 i guess im waiting for a 775 1366 compatible one

And to see if its stable what other test should i run?

There won't be a cooler compatible w/ both, the socket is differently shaped. You will need a whole different cooler for 1366. Orthos and Prime are the ones I use for stability (although I really don't see a point it using them usually).

[douglatins]

Look at this, is this possible?
http://www.tomshardware.com/reviews/...hz,1658-6.html
4.0+ with ~1.2V

[farlex85]

Originally Posted by douglatins

Look at this, is this possible?
http://www.tomshardware.com/reviews/...hz,1658-6.html
4.0+ with ~1.2V

I think cpu-z is inaccurate there, the table at the bottom has max fsb's w/ 1.5v, and those seem more reasonable. The real volts there are probably a little over 1.5, if not 1.6v. That's what I would think anyway, that would be all kinds of crazy if they got that kind of oc w/ undervolting, and I've never seen a 6750 that could get to 4ghz w/o at least 1.45v........

[douglatins]

Ok 515*7 didnt cut it, crazy stuff, i guess because of early bios, but now i am at 450*8 1.25V, will run prime, nops errors

Trying 450*8 1.3V, ok here my temps are 62~, should i keep this or rollback to 3.4 58~?

[Kursah]

Originally Posted by douglatins

You seem to have the same board as I, should i upgrade bios? and what about these OCCT?

I did find better stability with Ket's m1306 bios, the newest beta is 1402 which was so-so.

Nice thing about these boards is the ability to flash bios from USB drive w/o needing any flash utils...just plug in the drive, pres ALT+F2 during POST it'll load the Asus EZFlash and go.

http://www.xtremesystems.org/forums/...postcount=3094 - Asus Beta 1306

http://www.xtremesystems.org/Forums/...3&postcount=61 - Ket's Modded 1306

As I said I run Ket's modded bios, treats me very well...damn good board!

[farlex85]

Originally Posted by douglatins

Ok 515*7 didnt cut it, crazy stuff, i guess because of early bios, but now i am at 450*8 1.25V, will run prime, nops errors

Trying 450*8 1.3V, ok here my temps are 62~, should i keep this or rollback to 3.4 58~?

62C isn't too bad, these chips can take some heat, that should be fine. What kind of errors are you getting and how quick? Here's the thing about stability tests, they are good for quick stability checks and official oc marks and such, but not really relevant for many oc's. My oc (515x7) fails prime and orthos after 30min or so. But I never do anything that actually uses 100% of each core for 30min straight, and vdroop is nasty on my board (and gets nastier under full load). Sure I could bump up the voltage a little higher for a fully prime stable oc, but my oc is perfectly stable in every situation outside of prime and orthos, and I would rather have lower volts and temps than just say it's prime stable. So I guess what I'm saying is, if it fails prime, that's not the be all end all if all your going for is a normal oc. If it locks or fails during everyday tasks, then go ahead and bump up the voltages or lower the clocks, otherwise, don't worry too much about stress testing.

[douglatins]

Originally Posted by farlex85

62C isn't too bad, these chips can take some heat, that should be fine. What kind of errors are you getting and how quick? Here's the thing about stability tests, they are good for quick stability checks and official oc marks and such, but not really relevant for many oc's. My oc (515x7) fails prime and orthos after 30min or so. But I never do anything that actually uses 100% of each core for 30min straight, and vdroop is nasty on my board (and gets nastier under full load). Sure I could bump up the voltage a little higher for a fully prime stable oc, but my oc is perfectly stable in every situation outside of prime and orthos, and I would rather have lower volts and temps than just say it's prime stable. So I guess what I'm saying is, if it fails prime, that's not the be all end all if all your going for is a normal oc. If it locks or fails during everyday tasks, then go ahead and bump up the voltages or lower the clocks, otherwise, don't worry too much about stress testing.

515 didnt boot correctly, and what temps would you say are the most they can get?
Now im running 3.4 1.2V, 62~ in load using two copies of prime, 3.6 was getting dangerously close to 70C, will try other voltage values

[douglatins]

Originally Posted by Kursah

I did find better stability with Ket's m1306 bios, the newest beta is 1402 which was so-so.

Nice thing about these boards is the ability to flash bios from USB drive w/o needing any flash utils...just plug in the drive, pres ALT+F2 during POST it'll load the Asus EZFlash and go.

http://www.xtremesystems.org/forums/...postcount=3094 - Asus Beta 1306

http://www.xtremesystems.org/Forums/...3&postcount=61 - Ket's Modded 1306

As I said I run Ket's modded bios, treats me very well...damn good board!

Upgrade BIOS is too scary for me, i could have a heart attack or something if it went wrong

[Kursah]

OK...well the bios you're on is known for being an issue at higher FSB's if you read up on P5Q Deluxe OC forums...it's pretty pain free takes about 30 seconds...it scans the bios you want to flash to, asks if you're sure...push enter wait 30 seconds, it'll auto restart. Shut down and clear the cmos, power up and you're good.

I didn't even clear the CMOS the first bios flash I did on this board and it went error free! I did clear it while I was replacing my PSU though, just because it's habit..had the jumper on the clear pins before I realized it lol!

Don't blame you for being hesitant, but if it messes up this board has 2 bios chips, one is a loader ROM that will load 0506...it's pretty tough to really mess one of these newer boards up with that safety feature. I recommend you read through the P5Q owners manual to learn more about it's features in this area, some pretty good stuff!

[farlex85]

Originally Posted by douglatins

515 didnt boot correctly, and what temps would you say are the most they can get?
Now im running 3.4 1.2V, 62~ in load using two copies of prime, 3.6 was getting dangerously close to 70C, will try other voltage values

If your wanting to run a oc all the time 70C is probably the max you would want to go. Generally 60C is where most people here draw the line, but the chip should be fine at higher temps, maybe not for very extended use (probably wouldn't want it there for the better part of a year or something).

And like Kursah was saying, it's actually very easy to flash a bios, and really just don't do it during a storm or something, as a power outage is really the only thing you really have to worry about. Also, manufacturers will rma the board anyway if the bios is corrupted, mine did in the past .