Help OCing E6750 over 4Ghz!!!

[spencer22l]

I bought Kingston HyperX 8500 5-5-5-15 from here!

And since my goal is 4gb = 500x8 in e6750, RAM will no longer be a problem!

I have successfully booted into windows and got it validated at 4ghz (check my sig)

But all voltages are at max except cpu core which is still mega high at like 1.66v

There are pll settings which I know nothing about and I need help!

Some suggestions please??

 

[Altered]

Ill be watching this as I have the same chip. 3.8 is about it as far as stable for me.

 

[LittleLizard]

first of all, get a better psu as i dont think it could handle a 4830 oced and a 65nm oced to the limit core 2

 

[Deleted member 24505]

I got mine to 4ghz,it was at 1.56vcore i think.I have tried mine upto 1.6v but no higher(i dare'nt lol)

Its not easy to run it for 24/7 though,the vcore needed is too high for running 24/7.My temps did'nt really matter as i have water cooling,but on air it is not really possible as the temps would be too high with 1.6+ vcore.

 

[Error 404]

And since my goal is 4gb = 500x8 in e6750, RAM will no longer be a problem!

I fail to see what that means? If you're saying that 4 GB of RAM is required to get 500 MHz FSB, because of the 8x multi, then that has nothing to do with anything. I don't know where you got that idea from...
But a better PSU would be advisable, and maybe check what the vdroop is on your motherboard, since it might be running at something lower than 1.66.

 

[farlex85]

I fail to see what that means? If you're saying that 4 GB of RAM is required to get 500 MHz FSB, because of the 8x multi, then that has nothing to do with anything. I don't know where you got that idea from...
But a better PSU would be advisable, and maybe check what the vdroop is on your motherboard, since it might be running at something lower than 1.66.

He's probably referring to the fact that the ram is at a high speed and can run on a 1:1 strap @ 500mhz.

These threads seem to still pop up a bit, tis an old chip but many still just breaking them in. Good ol' e6750.

Anyway the only way to really help is if you outline all your settings. I got to 4ghz by simply raising up to 500 fsb and upping the cpu voltage to 1.6v (which can drop as low as 1.53v or so in windows under load). That's it. The P5K has more options than mine though, like termination and PLL, so it may not be so simple for you. You may get a more stable oc in the end though. Is your PSU just a case brand? If so you probably definitely want to change it before attempting any high oc'ing. If it's a reputable brand, you'll probably be ok.

 

[spencer22l]

My power isn't bought from Can/US but from another country.
It is pretty reputable in there, so that's why I bought it.

I think my power is enough, but not quite sure
But it also has a peak load of 500w.
And for my VGA, I overclocked it, got it stable but soon restored it to default.

As for the RAM part, farlex85 is correct

Just like many of you said, when I set my core v 1.6 in bios, it showed up around 1.53
in windows. But yes you mentioned, there are settings like different volts and plls which I don't know how to set correctly.

I've found a website where they easily obtained 4ghz with only around 1.2v !!!
http://www.tomshardware.com/reviews/taking-e6750-4ghz,1658-6.html


I was just out for like 5hours and got back now. I had it doing Gold Memory test on
1066, 5-5-5-15, 2.2v (stock) and everything went perfect.

My current setting is all auto except 1066mhz ram clock, 5-5-5-15 and 2.2v

Here are photos of my bios settings :

 

[Deleted member 24505]

You dont want the cpu voltage on auto really,it really hikes it up if you oc.At 4ghz with it on auto,i expect it will be 1.6+ maybe.

Try and set your voltages manually if you can,if they are on auto they can be very high.

Try cpu-1.56v
pll-1.50v
fsb term-1.3
nb-1.3

You may need to tweak them a bit.

Are you running 4ghz now? how are your temps with the vcore on auto? I dont really like running mine with over 1.5v for 24/7

I think they are using 1.6v on that link-

one company that was putting extended warranties on Intel Core 2 processors pushed as high as 1.60 volts! That company is Dell, and this is the voltage it uses in its water-cooler XPS 720 H2C.Dell's overclock voltage settings proved to be spot on for our processor.

 

[aCid888*]

I don't think you should be OCing this chip with that PSU..your card and chip with draw too much power and when it goes bang, you will have a lot of dead things.

Also, 1.56v to the core is 'OK' for 20 min runs every now and then, but if your hoping to run it 24/7 then you will kill your E6750 in no time.

Want 4GHz 24/7? Buy a E8xxx 45nm CPU and enjoy the goodness of 4GHz...my E6750 is run run 24/7 at 3.44GHz @ 1.41v and I have benched it at 3.88GHz @ 1.50v...I have never gone any higher because to be honest, I didn't see the need to.

Bottom line: get a new PSU and then try OCing things.

 

[Deleted member 24505]

I'm on water cooling,and i dont even run my vcore that high for 24/7.Mines at 3.6ghz/1.43v for 24/7

 

[hat]

I don't think it's going to happen, sorry. The way I see it is you have two options. Either upgrade to a 45nm core 2 or run 500x7 and get 1GHz memory and 3.5GHz on your cpu (which is still pretty damn fast)

 

[grunt_408]

My second rig has E6750, It has happily sat on 3.2GHz since day dot on 1.2 Volts. I have never even tried to go higher only have 800Mhz ram and air cooling. I have my E8500 for 4GHz

 

[spencer22l]

Everything is auto except the ram so for now,
even my clocks are just normal 333x6~8.

I will try those setting you've given me and if they don't work,
I'll just go for something lower

I guess I'll think about new PSU or 45nm.

It seems every new thing I buy lead me to buy another one lol

Do you guys have any idea how someone would reach 4.16 ghz with only 1.2v??
http://www.tomshardware.com/reviews/taking-e6750-4ghz,1658-6.html

Like is that even possible on 65nm??

 

[Deleted member 24505]

It was 1.6v not 1.2,cpu-z musta been wrong.1.2v is below stock voltage.

one company that was putting extended warranties on Intel Core 2 processors pushed as high as 1.60 volts! That company is Dell, and this is the voltage it uses in its water-cooler XPS 720 H2C.Dell's overclock voltage settings proved to be spot on for our processor.

 

[spencer22l]

Ohh, so Dell's setting is 1.6v with some other settings I guess..

Anyways, I can't seem to get 4ghz stabilized.

Only thing left for me to try are voltage references... what are they and how can i tweak them?

 

[3dsage]

I don't think you should be OCing this chip with that PSU..your card and chip with draw too much power and when it goes bang, you will have a lot of dead things.

Also, 1.56v to the core is 'OK' for 20 min runs every now and then, but if your hoping to run it 24/7 then you will kill your E6750 in no time.

Want 4GHz 24/7? Buy a E8xxx 45nm CPU and enjoy the goodness of 4GHz...my E6750 is run run 24/7 at 3.44GHz @ 1.41v and I have benched it at 3.88GHz @ 1.50v...I have never gone any higher because to be honest, I didn't see the need to.

Bottom line: get a new PSU and then try OCing things.

Yeah dude what Acid said is true your PSU is being pushed to its limits, Its gonna crap on you and your whole rig is gonna drowned.

Upgrade your psu and if you want 4GHZ out of that chip get some better cooling , some H20 Might be in order or some hardcore air cooling.

BTW how are those Hyper's treating you? Have you tried running a Cas 4 @ 1066? they can do it.

 

[spencer22l]

Yeah, I kinda guessed I can't really get to 4ghz with this psu and/or cpu.
Maybe it's just my cpu, but I dunno.

Anyways, I haven't done anything with the new rams yet.
Never gone above stock speed (1066) or under stock timmings.
I will try it now

I have 3.2ghz fully stable setting saved on my asus oc profile, so I'll just load that up
and start fiddling with my new ram

 

[3dsage]

Yeah, I kinda guessed I can't really get to 4ghz with this psu and/or cpu.
Maybe it's just my cpu, but I dunno.

Anyways, I haven't done anything with the new rams yet.
Never gone above stock speed (1066) or under stock timmings.
I will try it now

I have 3.2ghz fully stable setting saved on my asus oc profile, so I'll just load that up
and start fiddling with my new ram

Could be the cpu, but cpus will reward you with cooler temps.

Definately push those sticks, they will easily do 1100 5-5-5-18. Have fun with them

 

[spencer22l]

I failed cs4 with even 2.4v so I just stopped there.
After destroying a vga with ocing, I'm a bit scared now

But I've booted it 1100mhz 5-5-5-15.

What should I do for a quick stable testing... s&m long test?

 

[3dsage]

I failed cs4 with even 2.4v so I just stopped there.
After destroying a vga with ocing, I'm a bit scared now

But I've booted it 1100mhz 5-5-5-15.

What should I do for a quick stable testing... s&m long test?

Damn, I did cas4 with 2.2V its gotta be the board.

Try running 1024 Wprime test, see if you pass that for quick testing. You can also do P95Blend for a couple hrs.

Of course there is memtest if you really want to be thorough, I personally dont use it though.

 

[spencer22l]

I just finisehd the Wprime 1024m test and it just disappeared while I was
doing something else.
So I went to the score and it says 900s. That means I passed it right?

 

[3dsage]

Lol, yeah man. Try super pi mod 32mb run also.

Make sure you do before and after benchmark runs also, to see if your scores get better. I always do some everest mem bench when i'm tweaking ram to see what differences it makes.
Use memset to tweak ram via windows its a great tool.

 

[hat]

Download OCCT and run the Linpack test. That will tell you pretty quickly

 

[spencer22l]

Sorry for late reply, I just had lunch

I will try what both of you told me.
First SuperPI then Linpack. After that I'll tweak some more with memset.
How long should I Linpack for? 1 hr? 30min?

 

[spencer22l]

I just can't seem to give up on 4 g, so I did some more OCing.
After flashing p5k bios to p5kr and doing the pencil mod for vdroop.

My stock voltage is 1.3125v according to CoreTemp.

I can get 3.2ghz 400*8 stable at 1.1875v (all volts are bios volts)

3.6ghz 450*8 stable at 1.3375v

Finally 3.92ghz 490*8 at 1.475v and some minor settings in other voltages

But with every volts maxed out and core volt at 1.6125v, I still cant get 4ghz 500*8 stabilized, always, as soon as I start intelburn or linx or anything, it freezes instantly (most of the times ) or gives me the bluescreen then restarts..

Anyone got any idea of what the problem is?
My bios is shown in previous post in this thread, even though I cross flashed to p5kr,
everything is still the same