E6750 & Gigabyte P35C-DS3R Overclocking Thread

[5t3v0]

Originally posted by: jcossin
15C at load? No way, I never see anyone that low on load. upper 40s and low 50s are what I see everyone saying in the threads on e6750 overclocking. I'm at 29-30C at idle.

He means you need to add 15C onto those core temps because TAT assumes the tjunction max is 85C for this cpu where as it should be 100C. Read that article - all is explained. As stated above, your cores at 68 & 70 are high but not dangerous.

Originally posted by: jcossin
The onboard side has more crackling and whining noise by far than the X-Fi card. Do you think I have a bad board?

I had a similar problem with an old MSI board & was recommended to remove all cards & cables, take it out the case, blow off all dust & re-fit it from scratch. It helped a bit but it was never perfect. If it bothers you try doing this & if that doesn't help, RMA it.

 

[ChronoReverse]

I wouldn't be too surprised if onboard sound has poor quality =/

 

[mrfatboy]

whoops, sorry, bad typing Yes, you must add 15C to TAT. I still think you are high for your setup though. It was 82F here in san diego a couple of days ago and I was nowhere near your temps. Do you think you mounted the TR right?

 

[mrfatboy]

Originally posted by: ChronoReverse
I wouldn't be too surprised if onboard sound has poor quality =/

The onboard sound qualty is absolute crap. When I was having problems with my SB 24 live card I had to use it. I play BF2 and use skype with a friend of mine. He basically couldn't understand me with onboard sound. I finally got my sb live card working and it's now crystal clear. Big Big Difference.

 

[jcossin]

Originally posted by: mrfatboy
whoops, sorry, bad typing Yes, you must add 15C to TAT. I still think you are high for your setup though. It was 82F here in san diego a couple of days ago and I was nowhere near your temps. Do you think you mounted the TR right?

Well it's been about 105F here in Phoenix so that might be part of the problem.

I have reseated the TR 3 times and reapplied thermal paste each time. I did get a reduction after the third attempt.

I am in a mini-tower case, do you think orienting my motherboard vertically is causing the Ultra 120 to lose contact with the CPU? I'm using the thermal paste that came with the Ultra 120 since I am out of Artic Silver, would that make a big difference?

 

[Wurmer]

Ok, I am just curious here. Yesterday, I was stressing my OC with Ortho, all was fine for about 6 hours straight. I left my office and went to watch some TV. When I came back an hour or two later, it seems that my rig had restart. Can a reboot be caused by my overclock or is it just a coincidence ? I saw, my office light twitch 2 times in a row earlier, maybe we were having power issues and eventually the fluctuation got my rig to reboot..... Any thoughts on that ?

Also, to answer previous questions. Well as far as my temps are concerned, I am not running at stock voltage obviously, I was at 1.36 or near it can't remember.

As for thermal paste, I have decided to give the paste that came with the HS a try and see what it would come to. I have read an article, can't remember where that the stock paste was pretty decent.

BTW, anyone got Coretemp running under vista 64 ?

 

[mrfatboy]

Originally posted by: jcossin

Originally posted by: mrfatboy
whoops, sorry, bad typing Yes, you must add 15C to TAT. I still think you are high for your setup though. It was 82F here in san diego a couple of days ago and I was nowhere near your temps. Do you think you mounted the TR right?

Well it's been about 105F here in Phoenix so that might be part of the problem.

I have reseated the TR 3 times and reapplied thermal paste each time. I did get a reduction after the third attempt.

I am in a mini-tower case, do you think orienting my motherboard vertically is causing the Ultra 120 to lose contact with the CPU? I'm using the thermal paste that came with the Ultra 120 since I am out of Artic Silver, would that make a big difference?

@jcossin
lol, yes, 105F would do it Is that your room temp or outside? Also, the mini-tower would do it also. How's the ventilation in there? How many fans do you have? I was worried also about the tuniq putting stress on the vertical mobo but mine is rock solid. I heard the TR has a nice backplate also.

I also just used the paste that came with the tuniq. people said it would be fine.


@Wurmer
I have heard that a failed orthos can reboot the system. I think 5t3v0 has coretemp running and he has vista. See his sig. But you have to ask him.

 

[wscreamer]

jossin you seem to have an almost identical setup as me but i cant seem to get my computer to post with my computer running at 3.6ghz (9*400 ). I have the 4gb of patriot pc2-6400. I have it running at 5-5-5-12 1:1. Any idea on how to get the memory to boot at that speed??

 

[mrfatboy]

What are you complete computer specs? Did you try to set your bios like mine at the beginning of the thread? I cannot get 3.6 unless i increase (g)mch by +1v. Also, having 4gig of ram might be an issue. It's tougher with 4gigs.

 

[wscreamer]

specs:
Vista 64
Intel C2D E6850 at 3600 MHZ (9X400) Thermaltake V1 cooler
Gigabit GA-P35C-DS3R
Nvidia geforce 8800 GTS(640 MB)
2 74gb raptors in raid 0
4gb Patriot pc2-6400
Northbridge heatsink w/fan

I have my power settings on auto at the moment but even when I set the memory voltage to 2.2volt it still wouldnt boot. I didn't realy up the other voltages besides vCore.

Didn't realize the bigger memory would have problems but makes sense, though it is rated for 4-4-4-12

Oh and my cpu is running idle at about 30C but when I try to overclock it much more it wont POST.

 

[mrfatboy]

The only way I got my OC to 3.6 with 4-4-4-12 timings was to increase (G)mch by +.1. Have you tried that? I think the 4gigs is holding you back now. I'm sure you can get it to work by changing other settings but i don't have any experience with 4gigs.

I would definately set your memory voltage to what it wants manually. If it is rated at 2.2 increase it to .4v.

You could always pull 2 gigs and try it. That way you will know if it is a 4gig problem.

 

[jcossin]

I have also heard that it is harder to overclock with all the DIMM slots filled, so try pulling two DIMMs and see if it makes a difference.

I had Orthos running today with my system at 3.5GHz at 1.425 and it rebooted itself after about 4 hours, so an Orthos run can definitely cause a reboot on an unstable overclock.

Right now I'm very happy with 3.4GHz. My 3dmark06 score barely changes from 3.4 to 3.6 so I'm just gonna stay at 3.4GHz for awhile.

Oh, another thing, after my system reboot itself on the Orthos run today (I was at work and came home to a system sitting on the Vista Welcome Screen), I tried to restart my system and clock it down and it did the stupid thing again of not letting me boot into anything but stock speeds! I had to clear the CMOS again to finally get it to let me boot. This is annoying. I hope they come out with a BIOS that fixes it (fingers crossed).

 

[Wurmer]

Originally posted by: jcossin

I had Orthos running today with my system at 3.5GHz at 1.425 and it rebooted itself after about 4 hours, so an Orthos run can definitely cause a reboot on an unstable overclock.

Ah ! that explains then.

I am wondering, comparing 6750 and 6850 at 3.6, the optimal VCore should be pretty similar for both CPU right ? or should there be a difference. I see a lot of stable overclock for the 6750 getting stable at range of 1.425 - 1.45, I guess that it's at those figures that I should be aiming at. I tried a couple of lower Vcore setting without sucess.

 

[jhl81]

I am wondering, comparing 6750 and 6850 at 3.6, the optimal VCore should be pretty similar for both CPU right ?

e6850 seems to be a much better overclocking chip than e6750 especially with higher multi, so you should be able to oc it at a lower vcore than most e6750. I would try 1.35Vcore after vdroop to run at spec which i've seen alot of e6850 do at 3.6ghz ... but i guess it all depends on the chip ...

I had orthos reboot on me 8hours in, but my experience was the nb, got a fan cooling it and didn't have a prob after that.

 

[SniperDaws]

ok its done.

Old temps using stock cooler

http://s14.photobucket.com/alb...view¤t=Stock.jpg

New temps using Tuniq Tower at half fan speed with exacly same setup.

http://s14.photobucket.com/alb...current=TuniqTower.jpg


i also took off my heatsink and made a little foam shim out of Selotapes sticky pads, cleaned off the old gunk and stuck some AS5 on.


Hmmmm why arent my links working now?

 

[mrfatboy]

I tried getting my (g)mch (northbrdge) voltage back down to normal at 3.6. It fails orthos after 8 minutes. I guess I'm sticking with +.1v

I also tried lowering my vdimm to 2.1v. It failed orthos after 9 hours. Back up to 2.2v.

I have found my 3.6 sweetspot. See sig.

 

[mrfatboy]

@sniper, your links are not working.

@jcossin, when using 3dmark06, overclocking the video card definately makes the difference. My 3dmark06 score was 10500 @ 3.2 & stock vid card. See sig for maxed out 3dmark06 score.

 

[mrfatboy]

Originally posted by: SniperDaws
ok its done.

Old temps using stock cooler

http://s14.photobucket.com/alb...view¤t=Stock.jpg

New temps using Tuniq Tower at half fan speed with exacly same setup.

http://s14.photobucket.com/alb...current=TuniqTower.jpg


i also took off my heatsink and made a little foam shim out of Selotapes sticky pads, cleaned off the old gunk and stuck some AS5 on.

So about a 15C difference! Are you happy that you got the tuniq? What is you ambient with those temps?

 

[SniperDaws]

Ambient temp is a little higher than when i did the stock cooler test its 24c here and it was 20c when i did the stock test, yeah im well made up, once the thermal paste has bed in ill start Oc'ing although dont forget im using a Quad core so i dont think ill be getting 3.6.

ive got it at stock Vcore at 3.0Ghz im going to leave it priming tonight i think.

ill keep you posted and upto date.

 

[SlicedBread27]

I can't wait to finish setting up my system tonight so I can see what it can do. I guess I'll be putting my sound card in PCI 2. Hopefully I'll have some preliminary results for you guys tonight.

 

[mrfatboy]

Originally posted by: SniperDaws
Ambient temp is a little higher than when i did the stock cooler test its 24c here and it was 20c when i did the stock test, yeah im well made up, once the thermal paste has bed in ill start Oc'ing although dont forget im using a Quad core so i dont think ill be getting 3.6.

ive got it at stock Vcore at 3.0Ghz im going to leave it priming tonight i think.

ill keep you posted and upto date.

I am really learning that its hard to make cooler temp comparisons without knowing what the ambient is. It's a huge factor. I have noticed people saying "why isn't my temp lower?" all the time but finding out they live somewhere very hot. I have been one of them

My buddy and I built the exact same system together but for some reason his coretemp was 5C below mine. It turns out that he keeps his AC on 24/7 at 70F. I was around 80F when we did the comparison. Go figure. It seems to me that the delta between the amibient and core temp is the important number.

I took some temps throughout the day and my tuniq seems to cool between 9C-12C below ambient.

With Snipers cooling at 15C delta, it seems I didn't do a good job on seating my Tuniq And he has a Quad

What everbody else's temp delta?

 

[jcossin]

Well I looked at Gigabyte's web site last night and lo and behold, there was a new BIOS! They had F5 for my motherboard posted 9/7 (I was on F5a).

Since flashing to F5, I am able to set my MCH voltage and FSB voltage to Normal instead of +.1V and it's Orthos stable after 8 hours.

So right now I am at 3.4GHz, 1.425V and it's totally stable now. I'll probably try getting up to 3.6GHz again at some point but I'm going to stay at 3.4GHz for awhile and spend some time playing some games after spending all this time with the overclocking. I'm really happy to have this kind of speed of a $199 CPU, $95 mobo and $60 RAM!!!

 

[roorooroo]

@jcossin...did the bios upgrade help the PCI x-fi sound problem you mentioned?
I'm about to build with a similar setup and just wondered before i begin.
Hi everyone btw!

 

[jcossin]

Originally posted by: roorooroo
@jcossin...did the bios upgrade help the PCI x-fi sound problem you mentioned?
I'm about to build with a similar setup and just wondered before i begin.
Hi everyone btw!

No, it did not. I still get some electrical whine (very faint) through the X-Fi when I am using headphones. I didn't have this problem with my X-Fi with my previous motherboard, so I am suspecting there is not enough shielding somewhere on the motherboard.

The onboard sound is very noisy, there's no way I could use it as my normal sound, this board definitely needs an add in sound card.

 

[Wurmer]

e6850 seems to be a much better overclocking chip than e6750 especially with higher multi, so you should be able to oc it at a lower vcore than most e6750. I would try 1.35Vcore after vdroop to run at spec which i've seen alot of e6850 do at 3.6ghz ... but i guess it all depends on the chip.

Sorry I am not familiar with that term, what does Vdrop means in this case ?