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***The Official Core i5 Overclocking Thread***

Wonder if you guys can help me, i'm doing 4.1Ghz on 1.362v, but I can't get 4.2Ghz stable no matter how much voltage I pump through it.

Tried putting the mem multi to 4 (1680Mhz) and it's less stable than the 5 multi (2050Mhz)

I'm using the Alpenfohn Gletscherspalte CPAF-002 CPU Cooler and temps are fine. Low 40's idle and not even hitting 70's in prime blend.

So any idea's. Currently i've left the VTT and other stuff alone.
 
Im in the same place, got to 4.2GHz quite easily but cant get any higher, no matter what I try. Im at 4.2 using around 1.4v but even raising voltage to 1.55v (just because I was getting annoyed lol, would never use that 24/7) wouldnt get it to boot at 4.3. Other voltages dont seem to help either :(
 
I am intrigued. I might just have a go at going over 4.2 just for the lolz :)

The amusing thing is, I only stopped at 4.2 because that was the randomly chosen target for the day.

I don't even run at 4.2, I run at 3.6 max :p


*Second thoughts, mebbe not. I'm not that eager for a benchmark.
 
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Just managed to get mine to 4010 and have no interest in going higher. I think either games are just limited by graphics card power as runnning two benchmarks (Resident evil 5 and Stalker Pripyat) with the machine either running XMS memory settings (3360mhz running all cores and turboed to 3840mhz-ish with less cores used) yields pretty similar results to me running it with four cores at 4010mhz. Also I suppose if a game only uses one or two cores 3850mhz vs 4000mhz isn`t that much different.

I think I`ll just run the machine normal clocked with XMS memory settings as that seems good enough for 3360-3840mhz anyway, only if all four cores are used a lot will the 4000mhz overclock really make a difference so I`ll store my profile away once I have tweaked it a little more on the core voltage side. I don`t see the point in keeping it a 4000mhz, especially considering it`ll use a lot more power for just 140mhz gain sometimes

Oh, has anyone tried enabling turbo mode at 4000mhz overclock to get a little higher if only one or two cores are used?
 
Just tried enabling turbo mode and it blue screened on boot. WIth load applied the CPU voltage is at 1.336 according to CPU-Z, wonder if it needs more with turbo mode or should the turbo boost feature handle that?
 
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*shrug*

I just got to 4.4 with everything turned on and overclocked memory so may not be turbo holding you back.

The 4.2 in my sig ran for half an hour without errors or crashing on prime95 blend with everything on.
 
I`ve just started again from scratch, loaded the optimised defaults and then left everything on (C1E, EIST, TURBO). Changed to manual VCore voltage and managed to get toabout 3700 but found although prime ran, Windows explorer stopped working and had occassional screen flashes (screen goes blank). Now switched to Vdroop low and seems stable again, also turned down the QPI.

THere`s an art to this I can see, someone with loads of experience should knock together a detailed guide :)

After more playing around it`s difficult to get a safe OC with turbo mode enabled. When all four cores used it looks fine, prime can run for 30 mins but when running a Prime FPU test and selecting 2 or 1 threads the errors can start occuring because turbo mode kicks in and errors appear at the higher clock speeds
 
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Current clock......4.409ghz that's idle of 41 - 43 and under load goes to about 78. Only air cooled though and my family like the house way to warm for my liking.


Cpu volt is 1.46 in bios although cpuz states its using about 1.49
Ram 1.615
Vtt 1.397

havent currently got turbo enabled as i find its very difficult to get it to boot with turbo enabled when clocked pass 4ghz, anyone managed this?

anyone have any recommendations on how to bring the cpu volts down? as i see most of you are getting similar clocks with lower volts....or is that with turbo enabled?
 
Hi


Not sure if anyone else is taking place in the hwbot p55 comp?


Seen a few screenies of i5 750s with 200 x 24 = 4.8ghz on air:eek:



Dose anyone know how these people are getting x24?? Are the just using 1 or 2 core which I think in turn gives you a higher multi on turbo mode….
 
Electroshadow said:
Hi


Not sure if anyone else is taking place in the hwbot p55 comp?


Seen a few screenies of i5 750s with 200 x 24 = 4.8ghz on air:eek:



Dose anyone know how these people are getting x24?? Are the just using 1 or 2 core which I think in turn gives you a higher multi on turbo mode….
Click to expand...

Mmhmm

# No turbo = 20x
# 4 cores = 21x
# 2 cores = 23x
# 1 core = 24x

Considering my 4.4GHz was 210x21 with turbo on if I'd used only one core and assuming the system was still stable, 24x would be 5.04GHz
 
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I didnt know that! So could run it as a dual core with a 23x multi? Not bad as I was perfectly happy with a dual core and currently dont really need quad core lol.

Will mess round with that on thursday, my day off work :D
 
Ducky Spud said:
I didnt know that! So could run it as a dual core with a 23x multi? Not bad as I was perfectly happy with a dual core and currently dont really need quad core lol.

Will mess round with that on thursday, my day off work :D
Click to expand...

No, I don`t believe they meant that. WHen stress testing an overclocked CPU using Prime, you can tell it how many threads to start. If one or two threads used, higher multipliers will be reached (as per previous post) than if four threads used. When overclocked it is definately worth testing this - mine seemed fine at 4000mhz overclock with all cores at that speed until I made it clock higher using only one or two threads
 
just started clocking my rig in sig. What setting is it that I have to enable to allow me to use the 21x multi on a i5 750 and msi gd65? Dont seem to be able to get it working so far
 
LongThumb said:
I've turned off all those energy saving options, EIST, C1E etc. They really cripple the overclock.
Click to expand...

With your graphics card you may as well be running your I5 at stock because performance isn't enhanced much by you overclocking it.

With my 4850 I've gone from an E5200 to a Core I5 and gaming performance hasn't changed much due to the limitation of the graphics card.
 
Overclocking CPU has always a positive effect on framerates in games as well as general performance of applications. I'd say it affects you more with modern games than it used to few years ago. Many PC games are just console ports thus usage of GPU may be limited in some.
 
Yea it depends on what game. Many are very GPU dependant, but something like GTA IV loves a high clocked CPU, will definatelty see a boost in fps playing that
 
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