** OFFICIAL ** Core i5 Overclocking Results/Tips Thread

[miahallen]

Hey, good luck on the RMA's Gordy...and the future build

[Yamcha67]

Ran about 3hrs of prime 95, so far very stable @ 4GHZ (1.37V) - CPU VTT - 1.30V.. going to let prime run over night and see how it goes.. I hope I can get 4.4ghz out of this ;p

:]

[NoepZor]

Tomorrow i'm going to pick up my Core i5 750, MSI P55 GD65, 4GB XMS3 DHX memory and a Corsair Hydro H50 cooler. I hope this combo will clock nicely and I can show you some results. The main target is a nice OC for daily use, not WR beating

[Yamcha67]

Im having trouble getting it to run stable @ 4.1GHZ, I have the VTT set to : 1.303V, and I've tried 1.4V on the cpu.. should I bump cpu/vtt voltage??

[miahallen]

Getting to 4GHz was easy for me...from that point on, steady, generous doses of vCore were necessary for each increase in speed You need to keep an eye on your temps too

[Yamcha67]

Crap! I can't seem to get my i5 750 stable @ even 4Ghz =/.. I upped voltage to 1.39 hopefully it makes a difference.. what happens is after about 5hrs (prime 95) one core fails on me =/.. that one core is extremely stubborn, if it wasn't for it i would've been able to run my i5 @ 4.2Ghz..

[miahallen]

Ummm....5 hours of Prime95 is a bit overkill. I used to play this "stability" game, and it's not always cut & dry. Run Prime95 for an hour or two sure, but then do some real world testing.

I had a rig 24 hours prime95 stable before and it would crash within 5 minutes of attempting to encode a movie. Conversly, I've had another rig that would fail Prime 95 withing 15 to 20 minutes, but was rock solid stable 24/7 for my daily office & gaming needs.

On my daily rig, I only run a "stability" test for about 30-60 minutes these days, and even if it fails in that time, that doesn't bother me. Afterward, I start a 1080p movie encode job, and fire up an intensive game like FC2 or Crysis and play for a bit. If it's stable...I'm happy

[radaja]

im with you on stability miahallen.
i think 1 hr of prime95 blend and 5-10
runs of LinX.and the big one,as long as i have no crashes
or strange behavior while doing my normal daily usage
and it boots up everytime,i call it stable.

[ninjagordy]

Hey Again dudes....

righty....the replacement for the ud2 is the maximus III genie... anyone playing with one of these and an i5?..... if so... can you share the good/bad news with us...(lol....no more bad news for me please....!!!....lol)

cheers dudes!!

Gordy!

[Yamcha67]

I've finally managed to get it prime stable for 12hrs :P, I actually prefer having it prime stable for 8hrs minimum.. but thats just me

[PolRoger]

im with you on stability miahallen.
i think 1 hr of prime95 blend and 5-10
runs of LinX.and the big one,as long as i have no crashes
or strange behavior while doing my normal daily usage
and it boots up everytime,i call it stable.

I also think running long prime stability tests are unecessary and time consuming. I like to do a one hour run and then a two hour run. I also sometimes use OCCT and LinX/Intel burntest test. For long term testing I like to let the pc crunch... random reboots often turn up after 24/36/48 hrs which then requires a little more tweaking. I usually find that I don't have any stability problems after that.

i5:inbound...

[-n7-]

Heh, gotta get ready for heading out for Thanksgiving, but i decided to try some really quick OCing.

Haven't spent more than literally 30 minutes on this thing, so i imagine i can get voltages better when i have time.

[Drizzle]

My i5 runs 20x200 @ 1.325V ( L932B337 )
Cooling : Noctua U12P
Mb Gigabyte P55-UD3R

1h prime stable , ran it for allmost 3 hours , forgot to take a screen...

[grenadier]

Currently running my i5 750 prime95 stable at 21x200. Only problem is that it takes 1.5V . Load temps are 66C with my TRUE which aren't bad at all, but I'm still a bit nervous. Any tips on getting this voltage down while still maintaining stability? Is 1.5V even safe?

Full specs are in sig. RAM is running at stock speed / timings / voltages. Full voltages:
1.5V cpu, 1.25V imc, 1.5V dram, 1.15V PCH, 1.9V PLL

[Yamcha67]

Currently running my i5 750 prime95 stable at 21x200. Only problem is that it takes 1.5V . Load temps are 66C with my TRUE which aren't bad at all, but I'm still a bit nervous. Any tips on getting this voltage down while still maintaining stability? Is 1.5V even safe?

Full specs are in sig. RAM is running at stock speed / timings / voltages. Full voltages:
1.5V cpu, 1.25V imc, 1.5V dram, 1.15V PCH, 1.9V PLL

Hey, could I ask how you got the multiplier at 21?? I can't seem to do it on my MSI P55 GD-65..

[grenadier]

Hey, could I ask how you got the multiplier at 21?? I can't seem to do it on my MSI P55 GD-65..

On the asus boards the 750 is limited to a 20x multi, but enabling turbo-mode makes a 21x multi available. Try that - not sure it'll help cause it's a different manufacturer's board, but I'm interested to see what happens. Good luck.

[-n7-]

Well i left P95 Blend running all day while i was at the relatives for Thanksgiving.

RAM timings/performance is a disaster, i know.
I just left everything auto, as i'll worry about RAM later.

Seems 4 GHz is P95 stable anyway.

[ezaleina]

Bro -n7-.,can u give us ur bios template for the 4Ghz speed..tq

[-n7-]

Really wish this was stable, but it's not...have to figure out how to tweak things now...

4.3 GHz validation.
http://valid.canardpc.com/show_oc.php?id=763545





ezaleina, i haven't found my mobo's template posted anywhere to copy to, & i'm too tired to write anything out tonight.

But for the 4 GHz screenshot, i didn't really do much at all in the BIOS as i still have no idea what i am doing (used to s775).

You can see my voltage settings in EZTune.
All i did was set vcore to 1.325 & vTT to 1.17 & my vDIMM to 1.64
Turned off C1E/EIST/Turbo.
Everything else was auto or lowest values.

I will post my settings for higher speeds if i can get them figured out, but to do 20x200, i really did basically eff all other than raise vcore.

This mobo (P55-UD3R) seems pretty good for the price for OCing so far.
It's quite annoying how long POST is though.
Takes a while to get POST, & then i've got three SATA controller screens to sit thru...adds a crapload of time to get into the OS.
That & it's buggy as crap with my KVM.

Had these exact complaints with my P45-UD3P actually...one thing Asus does a lot better IMO.

[ninjagordy]

hey dudes,

anyone got base settings for 4ghz ish on the maximus III gene and an i5,

mines all got installed today and im ready to play but since my major issues previously i wouldnt mind something to use as a safe basis .

cheers

Gordy!

[Dahaka]

core i5 750
Batch: L924B521
Maximus III Formula.
OCZ Platinum 3x2GB PC14400 but actually using only 4GB
Stock cooler ( i want my megashadow now!! )



Regards.

[ninjagordy]

anyone got any settings for us yet??? (us genie noobs that is...lol)

[Yamcha67]

Meh, I got a bad batch, my processor does 4Ghz 12hrs prime stable but it demands 1.39V =/.. oh well at least I managed to get 4Ghz..

[grenadier]

Stock cooler ( i want my megashadow now!! ) Regards.

Go with a TRUE and an 1156 bolt-thru kit through frozen-cpu. It's probably cheaper and should give lower temps.

[Vinas]

hey dudes,

anyone got base settings for 4ghz ish on the maximus III gene and an i5,

mines all got installed today and im ready to play but since my major issues previously i wouldnt mind something to use as a safe basis .

cheers

Gordy!

Sorry, I just saw this... I have the same setup.

You should be able to do 4GHz pretty easily with the maximus III gene and i5. For example, my i5 CPU ran 4GHz stable at 1.36vcore and I only changed the settings below for that speed... Do this at your own risk

CPU settings: 
C1E Support: Disabled
Intel SpeedStep: Disabled
Intel Turbo Mode: Disabled
Intel C-STATE: Disabled

CPU Ratio Setting: 20
BCLK: 200
PCIE: 100
DRAM Freq: 1600 (or auto)
QPI Freq: Auto
DRAM Timing: Auto (I entered manual timing but I don;t know your ram)
CPU Clock Amplitude: +750
PCH Clock Amplitude: Auto

Extreme OV: Enabled
Full Pase Control: Full Phase
Load-Line Calibration: Enabled
CPU Voltage: Depends on your CPU; for this speed prime stable I needed 1.38v
CPU PLL Voltage: 1.90
IMC Voltage: 1.40
PCH Voltage: stock (auto/don't change)
DRAM Voltage: 1.65 for me, apply your own vdimm here
CPU Spread Spectrum: Disabled/Auto
PCIE Spread Spectrum: Enabled