Intel i5 750 Overclocking Advice/Help

[Kenmitch]

Word of advice.....just disable the turbo feature! It will save you a lot of headache when overclocking lol. Good luck and make sure to post back!

I did not see such a setting in bios on my board. Guess I should update bios anyways as it's about 3 or so behind current one.

I was playing around at 3.8ghz and decided to reload win7 as I'd rather start with a fresh install. OCCT wouldn't read voltages, cpu-z shows voltage changes but wont show multiplier changes,etc. Don't think win7 took to the board swap too good.

edit
After I did a clean install of windows 7 I updated the bios to the current one. Seems like the new bios has alot more settings available. It does now have the turbo on off switch now.

I was pretty burnt out last night by the time I got the clean install with drivers and all the updates done.

 

[big4x4]

Did some more testing and finally decided to leave it at 21 x 176 for 3.7 @ 1.15v under load. This passed 150 loops of LinX with a high temp of about 50! I cannot for the life of me figure out how to get the 24x multi or how some people are getting the vcore to go down during idle!

 

[big4x4]

Finally figured out how to get the 24x multi. I had c3/c6/c7 state set to auto. Once I set it to enabled, I could not boot into windows @ 1.15v. Had to put my vcore at 1.25 to boot into windows at 4.2+ ghz under 2 core load. Tested 2 cores with prime and the temps only got to mid 40's after 5 minutes. Had the voltage dropped during idle state, I would have maybe kept it enabled, but I decided the increase in 2 core speed (4.2+ ghz) is not worth the increase of voltage for 24/7 use (especially considering you are never going to really notice a difference). Back to 3.7 @ 1.15v and happy! I think I am leaving it there since it's rock solid lol Thanks for all the help and don't forget to post some of your i5 750 overclock adventures!

 

[IamShakes]

I was pretty confused when i started my OC on the I5. My ASUS board use the word Turbo for EIST and C-states tech for what people are talking about "turbo"

Right now with "turbo" i was able to get stable at ~1.225 with BLK of 165. 3.5 base quad with 4.0 single core. Been happy with this as i seem to be getting pretty decent power savings both with idle and gaming. I found LinX to be better for stability on this OC as it loads and unloads the cpu was switching between how many cores to use. Using P95 to test stability wasn't working as it maxed out all 4 cores. So while it passed P95 when i booted up a game and the cpu started switching between 3 and 2 cores i crashed.

I've also messed around at ~3.7 without turbo with a similar voltage at 1.225. Here testing with P95 was better than LinX as i was passing LinX without much issues but P95 was giving me errors.

The biggest power saving features are the EIST and the C1E. I'm not sure which clock i prefer when it comes to turbo vs no turbo but i figure for right now i'm rocking turbo since it was a feature of the chip.

 

[Kenmitch]

I decided to hang back and wait till my days off (Tues,Wend) to mess with my build.

My only free time other than my days off is later in the night once I get my daughter to sleep and to bed....Lately she's not too cooperative with my tweaking plans

 

[slekkas]

Finally figured out how to get the 24x multi. I had c3/c6/c7 state set to auto. Once I set it to enabled, I could not boot into windows @ 1.15v. Had to put my vcore at 1.25 to boot into windows at 4.2+ ghz under 2 core load. Tested 2 cores with prime and the temps only got to mid 40's after 5 minutes. Had the voltage dropped during idle state, I would have maybe kept it enabled, but I decided the increase in 2 core speed (4.2+ ghz) is not worth the increase of voltage for 24/7 use (especially considering you are never going to really notice a difference). Back to 3.7 @ 1.15v and happy! I think I am leaving it there since it's rock solid lol Thanks for all the help and don't forget to post some of your i5 750 overclock adventures!

Hello my friend,

I have an exact system as yours.
i5-750
Gigabyte P55A-UD3
2x2GB OCZ 1600Mhz Memory

No matter what i do i get an error after exactly 1 min in Linx. Is there something that i'm missing? i read your thread and i tried to do exactly what you did but you only mention vcore and c-states. Can you please post some more details on how you have setup the bios? Witch bios version are you using by the way?

 

[big4x4]

I had the same thing happen. Go to gigabyte's website and update your bios to the most recent (I think it's F5c beta). I flashed with Gigabyte's @bios without any trouble. Let me know if that works or else I'll post all my settings!

 

[Kenmitch]

Well after a stupid mistake of upgrading to the lates bios....Which is pretty buggy I hear I'm backpeddling my bios and moving on.

Currently playing around with turbo enabled and voltages

Guess I'll be updating with some results later today....But it looks like one way or another the chip will be at 4ghz or better.

Good thing is I'm thinking this little freak of a chip runs cooler than my Q9550

Hmm....Looks like water is the way to go on these little monsters

 

[big4x4]

Awesome! Post back with your final OC and voltages. How are you going be testing for stability? Make sure you disable c3/c6/c7 states or else you will be at like 4.8ghz on 2 cores!!

 

[Kenmitch]

Awesome! Post back with your final OC and voltages. How are you going be testing for stability? Make sure you disable c3/c6/c7 states or else you will be at like 4.8ghz on 2 cores!!

Currently playing around with turbo enabled (21x) sitting at 3.8ghz and using the evga e-leet program to drop the voltage to see if it's stable.

I might have to play around with the 24x

I always start my testing with Intel Burn Test first. Then when I find the spot I like I then go for OCCT and then prime.

I kinda like the way win7 will shift the 1 or 2 thread loads from core to core

Temps in the very low 50's on the warmest core so far and slowly dropping as I drop the voltage

 

[big4x4]

What kind of volts are you working with right now?!? 3.8 + turbo needed 1.28 v in the bios which I thought was too much for the hot weather southern cali!

 

[big4x4]

And how does that EVGA e-leet program work exactly? Sounds like a time saver!

 

[Kenmitch]

The evga e-leet program looks almost like cpu-z but has overclocking tab. So basically I'm booting up with voltages on auto. Then do a run of Intel Burn Test on all cores then I start dropping the voltage to see when IBT fails. Then for now I'm just writing down the vcore under load for ref later when I'm gonna tweak the bios settings

I'm currently playing around at 4.1ghz with loaded vcore of 1.35 my warmest core just broke the 60*C mark

Next reboot I'm going for 4.2ghz

Judging by the IBT times and data output it looks like it takes a i5-750@3.8ghz to overtake the Q9550 at 4ghz!

 

[big4x4]

Wow sounds like you got a nice little chip there. What kind of cooling do you have for those kind of temps?!?! Do you think you are gonna do the coveted run of prime95 for 24hrs? My last run before I was able to do the full 24 hrs failed at 23 hours and 22 minutes....LOL....kinda pissed me off! Couple more tweaks and I was there!

 

[Kenmitch]

I'm running water cooling in my HAF 922 it's my first water cooling setup and it seems like it works pretty good so far even with the low speed fans

http://forums.anandtech.com/showthread.php?t=2037104&highlight=

Well 4.2ghz seems to be stable so far at vcore around 1.40 the temps on the warmest cores are getting close to 70*C

Guess I'll reboot again and try for more

Guess I'll have to redo my photos as that's my old Q9550 setup in the case shots

 

[Kenmitch]

Hmm....Looks like the chip is starting to give a fight at 4.3ghz

Guess maybe I'll have to go back into the bios and put my mem back into spec to make sure it's not the mem....Note to self remember overclock the mem after you max the cpu out

On a good note at 4.3ghz with a vcore just above 1.40 the temps on the warmest cores are just now breaking the 70*C mark....Ambient temp of 68*F

 

[slekkas]

I had the same thing happen. Go to gigabyte's website and update your bios to the most recent (I think it's F5c beta). I flashed with Gigabyte's @bios without any trouble. Let me know if that works or else I'll post all my settings!

I have the F5 bios witch is the latest one. Is that what you have?
All the testing i have done is with this bios. Could you post your settings so i can compare with mine?

I've got so obsessed over this that i'm at my own birthday party and i cant wait for everyone to leave so i can go back to my overclocking and get a stable 4GHz. Or whatever, 3.7 3.8 i'd still be satisfied.

 

[Kenmitch]

I've got so obsessed over this that i'm at my own birthday party and i cant wait for everyone to leave so i can go back to my overclocking and get a stable 4GHz. Or whatever, 3.7 3.8 i'd still be satisfied.

Kinda funny how tweakers think

Well at 4.3ghz and it wasn't my memory. It' time to play with more voltages I found out.

Not sure if the little beast has much more in her as I'm kinda unsure of voltage limits of the i5-750's

I'd hate to disable the C1E and speedstep and my chip likes turbo

Guess in the end I'll see what it'll take to enable the 24x turbo mode at least.

 

[big4x4]

Just off the top of my head, here is what I have:

Turbo: enabled
C3/C6/C7: auto
C1E: enabled
V-droop correction: auto (or enabled)
QPI multi: 32x
CPU multiplier: 20x
BLK: 176
Cpu voltage: 1.161
Memory Multiplier: 8x
PCI-express frequency: 100
Ram voltage: 1.62
Memory Timings: 8-8-8-20
Vtt voltage: 1.9
PCH/CPU PLL: up one notch from stock

 

[slekkas]

Just off the top of my head, here is what I have:

Turbo: enabled
C3/C6/C7: auto
C1E: enabled
V-droop correction: auto (or enabled)
QPI multi: 32x
CPU multiplier: 20x
Cpu voltage: 1.161
Memory Multiplier: 8x
PCI-express frequency: 100
Ram voltage: 1.62
Memory Timings: 8-8-8-20
Vtt voltage: 1.9
PCH/CPU PLL: up one notch from stock

At what speed are you operating again now? You didn't mention the bus speed.

 

[big4x4]

And just checked what bios I have....F5c beta

 

[big4x4]

It is 3.7 ghz (21 x 176) under load @ 1.152v checked via CPU-z

If I can figure out how to post pics, got a couple pics of temp/cpu-z under load lol

 

[slekkas]

And just checked what bios I have....F5c beta

You think i should downgrade my bios just to try? Could they have messed something up with version F5?

 

[slekkas]

It is 3.7 ghz (21 x 176) under load @ 1.152v checked via CPU-z

If I can figure out how to post pics, got a couple pics of temp/cpu-z under load lol

Can you guys take a look at this youtube video that i made with all my settings and what is happening when i run Linx? Tell me if you notice anything odd.

http://www.youtube.com/watch?v=yl_uCxFuve0

 

[big4x4]

Turn LLC on and use the 21 multiplier! 21 x 191. Set your vcore to 1.4 in the bios and you should be good to go. Also, try prime 95 as well. Post back with what you find out