*** MSI P6N SLI Platinum OVERCLOCK 650i ***

[Assimilator1]

Originally posted by: Planatoid
I would get BSODs that I found out were from my NB chip overheating, at a bout 1.325v without the fan. With the fan on, I've never gotten a similar one even at 1.5v. The chip stays nice and cool.

lol ,I did ask if you had a fan on the NB

 

[shadowwlf]

I am new to this forum and I was looking to see if anyone here has had any luck OCing the SLI-FI with a Pentium D 940 3.2 Ghz. If anyone has what was the highest stability you could get from the platform. I am expecting my mobo tomorrow in the mail along with a 700 watt power supply for this little adventure.

Here is what I am planning to put together.
MSI P6N SLI-FI
2 Gigs PNY DDR800 CL4
Pentium D 940 3.2 Ghz (stock)
Cooler Master RR-LCH-P9E1 92mm UFO CPU Cooler
3 WD Sata II 250 Gig
Geforce 7800 GTX
RocketFish 700 watt Power supply

for ventilation I have
1 front 90mm HSF
1 rear 90mm HSF
1 top 90mm HSF
1 side 120mm (not sure if it is HSF or not)
3 rear 40mm fans

I was also planning on pulling off the NB and SB before I fire it up and putting AS-5 compound along with a 40mm fan on the NB.

If anyone has any suggestions or has experience with a similar setup please let me know. This will be only the second rig I have overclocked. But the first one was dual PIII 500 Mhz, and that doesn't even compare with this beast.

 

[Freeseus]

Originally posted by: Assimilator1
You got it to 3.7GHz!:Q ,wow! even if that speed isn't stable for you at least 3.5GHz should be

I see you're putting quite a bit of voltage through your NB ,not sure I'd want to go that high on a permanent basis ,but I'll give it a go for testing purposes.

It's stable. I left it running for 2 days straight with no BSOD and also played UT3 demo for a bit during that time.

Originally posted by: Assimilator1

Originally posted by: Planatoid
I would get BSODs that I found out were from my NB chip overheating, at a bout 1.325v without the fan. With the fan on, I've never gotten a similar one even at 1.5v. The chip stays nice and cool.

lol ,I did ask if you had a fan on the NB

My Antec 900 case has a ton of fans (including a massive 200mm) running through it, so it's probably keeping the NB pretty cool. I'm going to actually try lower the voltage on the NB and see what happens. The stability from the overclock came from increasing the CPU voltage a lot.

But for all intents and purposes, the 3.7133 OC seems to be stable for me. I just hope that there is no electron migration over time.

 

[Assimilator1]

Freeseus
You won't know its stable until you've done a 24hr Prime 95 test or used it for some months.
All CPUs suffer from electromigration ,even ones at default clock rate ,just higher clock rates & higher voltages accelerate it.Personally I'd never go over +10% std vcore.

 

[imported_SeeFu]

With my P6n Platinum & E6750, I can hit a FSB of 1713 (So memory is 800mhz). I did need to increase Vcore by .01250 though. No other changes were needed. It's likely that I can o/c even more, but I haven't tried yet. Computer seems fairly stable. Will need to run prime 95 tonight.

 

[imported_SeeFu]

Originally posted by: cruzdiablo10
So, you didn't have to mod the pro, did you?.
The new bios allowed you to OC the E4300 to 3.3, didn't it?
Another thing... What are the holes you could discover?

i've heard that there are holes from 1500-1700. i was able to go up to 1525 but no more. Then I decided to jump to 1713 and it works just fine.

 

[Assimilator1]

Wow that's a great FSB you've got!

What NBv & FSB VTT voltages are you on?

I've got upto 1600 on my C2D but I can't get it stable over that with a NBv of 1.4v (I'd rather not go higher).Its not a CPU vcore problem inccidently.

Btw I found no holes between 1500-1600 as far I can remember ,but with my quad I definatly found a hole at 1200 FSB ,maybe adjacent speeds too but I didn't bother testing them.However 1250 was less stable than 1300FSB!

 

[imported_SeeFu]

no adjustment to anything other than vcore was needed. I did have to manually set my memory timing and power though. crucial ballistix pc6400 4-4-4-12 @ 2.2volts.

 

[imported_SeeFu]

Is it possible to get the system to show you how many volts the vcore is actually at instead of how much u've increased it?

 

[Assimilator1]

Not that I know of ,& I find it annoying too!.

Btw are you sure you've got the same mbrd as us? ,AFAIK no one has been able to go anywhere near 1600FSB without increasing the NBv ,let alone higher FSBs.

 

[imported_SeeFu]

I did have to end up upping the vcore and nb more. NB is at 1.35 vcore is upped .05.

 

[Assimilator1]

Ah I thought so ,still that's exceptionally low NBv for that FSB
Btw have you stressed tested with Prime95/Orthos or something similar?

I'll be seeing how high I can get my Q6600 next week

 

[imported_SeeFu]

prime 95 stable.

 

[imported_SeeFu]

what temperature can i take the G0 e6750 up to?

 

[imported_SeeFu]

So it looks like I can hit 1800fsb w/ a .05 vcore increase and NB at 1.4. What's interesting is my load temp gets to 67c, but the vcore shows under 1.325 at all times. is this normal to have such a high processor core temp, but with a vcore that doesn't show much increase over stock?

 

[Assimilator1]

I would say yes because you have increased your CPUs clock speed by over a 1/3! ,though it will also depend upon how good your cooler is.
What were your temps @def speed under load?

67C is in the safe zone AFAIK but it is rather at the top end of it ,check out the quad overclocking guide in the overclocking forum for more info.[edit]I've just had a look & its claimed there max safe temps is 71C for the G0 stepping.

 

[imported_SeeFu]

temp under load without overclocking was around 57C

 

[Assimilator1]

Seems you're cooler is somewhat lacking ,I'm getting those sort of temps with my Q6600 o/c to 3GHz & +0.0375v(currently 59C,full load).
Are you using the std Intel cooler?

 

[WT]

Revisiting an older thread here - below are my two posts from page 5:

Initial OC effort and H/W-

MSI P6N Platinum
CPU: Intel C2D 6600
Memory: 2048 MB of Buffalo Firestix DDR2-800
Video Card: eVGA 8800GTS 640mb ACS Nvidia
Hard Drive: Seagate 7200.10 500.0 GB @ 7200 RPMS

DOH !!! Orthos dashed my hoped there .. had the temps up to 53c and failed after less than an hour. Voltage at 1.46 at this point.
Sitting at 3.4 now with a 1.44 CPU voltage. It was running Orthos for over 2 hours so I'm closer to my 'safe and stable' setting than I was last night with my initial go for broke overclock. I'd like to bump the voltage down to 1.42 and run Orthos overnight. CPU will creep up to 53c running Orthos but won't top that, so I'll assume an extended gaming session won't push the PC like Orthos will.

Edit: 3.4 appears to be the comfortable point for my setup, at I was able to lower the CPU voltage to 1.42 and run Orthos for hours before calling it a success. I realize 24 hours would be a better time frame, but I want to keep my temps and voltages lower than my initial test. I would have loved to have gotten 3.6 stable but 3.4 is nothing to sneeze at, especially for the older games that I play.

Edit II: OK, since I last posted, my Buffalo RAM has bit the dust, replaced by Super Talent DDR2800 RAM ... I'm shooting for 3.6 again and assuming the RAM is my problem. Can anyone recommend some 1000 or 1066 RAM that would run closer to spec at 3.6ghz for this board ??

 

[Assimilator1]

so I'll assume an extended gaming session won't push the PC like Orthos will.

Though the CPU might not be pushed as hard don't forget that the graphics card is being loaded in gaming & thus chucking out a lot more heat.It may or maynot make a difference to a 'stable' o/c ,though judging by your low temps I doubt it.

You don't need high speed RAM to run at high FSB ,just run the RAM asynchronously to the FSB.
Though you can run your DDR2 800 synchronously right upto 1600FSB (400MHz),3.6GHz which is what you're aiming for. So no need for new RAM

Did you up the NBv?

 

[WT]

Just a bit, to 1.5. I did pick up a Zalman Fanmate to throttle back the lil 8k screamer on there, but I'm worried my experimentation is going to burn up another pair of RAM sticks. I assumed Buffalo Firestix were higher quality than what I've been reading lately ..

 

[Assimilator1]

Just a bit?? isn't 1.5v the maximium?:Q

Why do you think you caused the RAM to die? what voltage did you use?

 

[WT]

1.4 is default, so the bump to 1.5 was simply following the standard overclocking setup for this board. I was getting nvlddmkm errors every single time I tried to play a game so after assuming it was the vid card and trying everything from that angle, I eventually learned that the RAM was the culprit, and swapping that out solved the errors. Voltage was 2.2 at the time and remains at 2.2 using the Super Talent RAM. In all honesty, 3.6 may be a pipe dream for my setup, but I initially ran several runs of 3dMark06 at 3.6 with no issues. It wasn't until I ran Orthos that it failed in under 20 minutes.

 

[Assimilator1]

No the default for the NB is 1.25v ,the default for the SB is 1.4v (I think) ,so running 1.5v on the NB is right near if not at the top end.

2.2v is Ok for some RAM ,depends on the manufactures specs, what are they for your RAM?

 

[WT]

Ahh, my bad. I was mixing up the NB and the SB, its the SB thats at 1.5. NB is ... hmm ... not sure on that one. I'll hafta check and post back. Current RAM is the Super Talent DDR2-800 stuff that Ewiz is selling on the cheap, and I've subsequently knocked down my 3.2 OC to 3.0 after fretting about whether something I did caused an early death for the Firestix. Mind you, I hadn't been in the BIOS to change anything since my initial OC forays, so I'd guess that was nearly 2 months ago, if not more. I really haven't stressed anything yet in comparison to other OCs that I've seen users obtain, I just want to see if I can safely give 3.6 ghz another shot.