overclocking i5 760 2.80GHz @4.00GHz on OcUK's Titan Exodus system

murmur

murmur

murmur

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Location
Nottingham, UK
[ previously posted here: http://forums.overclockers.co.uk/showthread.php?t=18531426 ]

Hello!

I have a "Titan Exodus" pre-built system from OcUK, purchased May 2010:
  • Intel Core i5 760 2.80GHz overclocked to 4.00GHz
  • Corsair XMS3 4GB (2x2GB) DDR3 PC3-12800C9 1600MHz Dual Channel
  • Asus P7P55-M Intel P55 (Socket 1156) DDR3 Motherboard (P7P55D-E LX specifically)
I've recently upgraded the BIOS from the original version (0201) to the latest (1701).

Alas, I didn't note down the overclocking settings, and attempting to re-apply the saved "ocuk" O.C. Profile simply gives a "Status: Profile 1 item is not match" error message.

I've contacted OcUK support via their WebNote system, but they say they unfortunately don't have details of the configs from 2010, and suggested I ask on the forums instead.

I've also attempted to downgrade the BIOS version back to the previous one, but the EZ Flash utility refuses to downgrade, and based on what I've read up, it's likely to brick the system if forced.

Would some kind soul be good enough to let me know what their BIOS Ai Tweaker settings are that let them run at 4GHz?

CPU Ratio, BCLK Freq, IMC, CPU voltage, etc?

I've attempted to do some overclocking myself, but I can't get it to go up to the previous 4GHz.

Thanks!

--M.
 
Last edited:
I have an i5 760 which i can run at 4.0ghz but its on a gigabyte motherboard.

Not sure if my settings will help but can take a look if you have no luck.
 
Hi the1gooner, if you could pass along your settings, that would be useful!

This is what I've managed so far:

Code: 
[U]My initial attempt:[/U]
Speed: [COLOR="Lime"]3.6GHz[/COLOR]
CPU ratio: [COLOR="Lime"]20[/COLOR]
BCLK: [COLOR="Lime"]180[/COLOR]
CPU voltage: [COLOR="Lime"]1.35625[/COLOR]
IMC voltage: [COLOR="lime"]1.22[/COLOR]
DRAM voltage: [COLOR="lime"]1.66[/COLOR] (default RAM spec)
PLL voltage: [COLOR="lime"]1.8[/COLOR] (default)
PCH voltage: [COLOR="lime"]1.05[/COLOR] (default)
Load-Line Calibration: [COLOR="lime"]Disabled[/COLOR]

Notes: several hours of primes95 and general usage, temp stays well below 70
CPU-Z Vcore idle: [COLOR="lime"]1.344[/COLOR]
CPU-Z Vcore load: [COLOR="lime"]1.264[/COLOR]

Code: 
[U]Turning it up a notch:[/U]
Speed: [COLOR="Lime"]3.8GHz[/COLOR]
CPU ratio: [COLOR="lime"]20[/COLOR]
BCLK: [COLOR="lime"]190[/COLOR]
CPU voltage: [COLOR="lime"]1.4[/COLOR]
IMC voltage: [COLOR="lime"]1.3[/COLOR]
DRAM voltage: [COLOR="lime"]1.66[/COLOR] (default RAM spec)
PLL voltage: [COLOR="lime"]1.8[/COLOR] (default)
PCH voltage: [COLOR="lime"]1.05[/COLOR] (default)
Load-Line Calibration: [COLOR="lime"]Disabled[/COLOR]

Notes: several hours of primes95 and general usage, temp stays below 70
CPU-Z Vcore idle: [COLOR="lime"]1.384[/COLOR]
CPU-Z Vcore load: [COLOR="lime"]1.296[/COLOR]

Code: 
[U]Trying to reach original OcUK speed:[/U]
Speed: [COLOR="Red"]4.0GHz[/COLOR]
CPU ratio: [COLOR="Red"]20[/COLOR]
BCLK: [COLOR="Red"]200[/COLOR]
CPU voltage: [COLOR="Red"]1.41875[/COLOR]
IMC voltage: [COLOR="Red"]1.3[/COLOR]
DRAM voltage: [COLOR="Red"]1.66[/COLOR] (default RAM spec)
PLL voltage: [COLOR="Red"]1.8[/COLOR] (default)
PCH voltage: [COLOR="Red"]1.05[/COLOR] (default)
Load-Line Calibration: [COLOR="Red"]Disabled[/COLOR]

Notes: core 3 fails on primes95 within a minute

Enabling LLC results in the CPU temp (from Real Temp) going above 80 
(which makes me think the voltage is too high?) so I stopped the test 
after a few minutes.

Dropping the CPU voltage to 1.38750 with LLC enabled results in core 3 
failing on primes95 again.

Some questions:

1) Should I have LLC enabled? From reading around the 'net, it sounds like this is sometimes required for high overclocking, but should ideally be left off. Do I need it on to reach 4.0GHz on this CPU?

2) What is the maximum temp I should be running the CPU at? Reading the Intel spec sheet says 72 degrees max.

3) What is the maximum CPU voltage I should be looking at for 4GHz? From what I've read, I shouldn't be going above 1.4, instead should be aiming for around 1.35?

Thanks!

--M.
 
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