4.5ghz - What Am I Doing Wrong?

aidi

aidi

aidi

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9 Jan 2012
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I am at my wits end with this elusive 4.5ghz Overclock.

Whatever i do, i can not get things stable

Everyone else seems to be getting to 4.5 with little or no problems and getting it stable. Mine, it just wont hold it. 4.2 is the best i can get. System spec is:

i5 2500k 35c at Idle
Ga-z68xp-ud3p
Noctua DH14
Corsair Dominator 8Gb Ram

I have tried the guide for 4.5 in the ga-z68xp-ud3p thread, and appreciate the replys i have had to try and get 4.5 stable.

I have tried with various levels of LLC
I have tried with cpu voltage offset

The only minor success i have had is by having the vcore up at 1.4v which i am not too happy about.

Is it just me, or am i sensing that other M/B are much easier to OC with more stable results?

I really am at a stage where i would even consdier selling this MB and getting something different.

Please help or advise what i should do?
 
You are not on your own mate, I've got a 2600k on a Gigabyte z68AP-D3 and cannot seem to get it above 4.3 which is frustrating when you see most hitting 4.5 with ease. I just wish there was some clear guide for each individual board, the manufacturers love to pride themselves on producing great overclockable boards but never release a clear guide. Well I suppose banging your head against a brick wall is the joys of overclocking. :D
 
Not all CPUs can reach the same OC with the same volts, and some motherboards are better as it than others. Though your Mobo should be pretty good. It's probably just your particular CPU. Nothing wrong with 4.2!
 
There are no guarantees in overclocking, you are forcing the CPU to run way over its original specification.

If you want a guaranteed chip, buy one that has been proven to run at that speed.
 
I'm running at 4Ghz now, I've had my CPU up to 4.5 and 4.7 but I messed around with the voltage and had to go back down to 3.4 and start all over again lol
 
Ok, i think lots of it is actually understanding what differnt settings are doing. Copying others settings does not give an understanding of what is being done.

So having said that... Being stable at 4.2ghz.. what is the course of action to get to the next level..

Increase vcore Voltage?
Increase/Decrease LLC?
Use voltage offset -/+ and by how much?
QPI/VTT Increase/Decrease? -/+ and by how much?
CPU PLL voltage - Increase/Decrease -/+ and by how much?

I am reading loads about these settings, but most just say increase this or decrease that.. but not knowing by how much is a bit daunting when you have no idea of what "could" happen.
 
beejjacobs said:
http://forums.overclockers.co.uk/showthread.php?t=18227651
I think I've linked that to you before, but it gives you an idea of maximums. Go in stages. What settings do you have atm for 4.2?
Click to expand...

Looks like limits have changed since Gibbo's first post;
Taken from OcUK
***OVERCLOCKING GUIDELINES***

- Do not exceed 1.425v core voltage, doing so could limit lifespan of the CPU
- Aim to keep temperatures below 70c underload if at all possible
- Do not overclock with BCLK, again doing so could limit lifespan of the CPU
- Recommended memory voltage is 1.50v, so make sure to run your memory at 1.50v, higher than 1.60v could limit lifespan of the CPU
- These recommendations come from OcUK and Intel, your warranty is un-affected but we highly recommend you adhere to the above to make sure your CPU lifespan is un-affected
- All Sandybridge CPU's worldwide should be run at the above or lower voltages, no higher!
 
Yep, checked the Sandybridge limits, and i am within them. Tried the settings in the Z68XP thread as well.

At the moment, i am running most things on Auto with the following manually set:

Mult Load Liine - Level 6
CPU 1.340v
QPI/VTT 1.2

RAM is at 1066
 
Its Corsair Dominator DDR3

When i kept BSOD'ing trying to get 4.5ghz, i dropped the RAM to 1066.. I just forgot to put it back to 1600.
 
I have always left the ram default or used the profile which sets it at 9-9-9-24

I have now set it to Profile 1 which gives the 9,9,9, 24 Its showing DRAM voltage at 1.64v
 
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You're best setting them manually if the XMP profile doesn't work properly. Don't leave them on auto and set the VRAM manually to 1.5v.
 
Ok, Ram is now set for 1600mhz at 1.5v with 8-8-8-24.

Could this have been where i was having all my problems with BSOD's?

I did have a 4.5ghz OC which passed IBT on high and ran Prime95 for an hour. As soon as i opened up Windows Media player it then Blue Screened.
 
aidi said:
Ok, Ram is now set for 1600mhz at 1.5v with 8-8-8-24.

Could this have been where i was having all my problems with BSOD's?

I did have a 4.5ghz OC which passed IBT on high and ran Prime95 for an hour. As soon as i opened up Windows Media player it then Blue Screened.
Click to expand...

It could be.

I've seen it where 1.65V has caused blue screens and errors with Sandy Bridge.

RAM lowered to 1.5V made all the problems go away.
 
i've got the same mobo and cpu as you and this is what i have my setting on..

I5 2500K 4.8GHZ

BIOS VERSION - F7B

\MB - ( M.I.T )/
\Advanced Frequency Settings/

CPU CLOCK - 33X
BCLK - ( DISABLED ) left at default 100mhz
EXTREME MEMORY PROFILE XMP - ( PROFILE 1 )
SYSTEM MEMORY MULTI - ( AUTO )

\Advanced Cpu Core Features/

CPU CLOCK RATIO [48X]
PWN FREQUENCY CONTROL [ AUTO ]
INTERNAL CPU OVER CURRENT PROTECTION [ AUTO ]
INTERNAL CPU PLL OVERVOLT [ENABLED ]
RATIO CHANGES IN OS [ DISABLED ]
INTEL BOOST TECH [ ENABLED ]
RATIO 1 - 4 [ 47 ]
TURBO POWER LIMIT [ 300 ]
CORE CURRENT [ 300 ]
CPU CORES ENABLED [ ALL ]
CPU ENHANCED HALT C1E [ AUTO ]
C3/C6 STATE SUPPORT [ AUTO ]
CPU THERMAL MONITOR [ DISABLED ]
BI-DIRECTIONAL PROCHOT [ AUTO ]

\Advanced Memory/

EXTREME MEMORY PROFILE X.M.P [ PROFILE 1 ]
SYSTEM MEMORY MULTI SPD [ AUTO ]
PERFORMANCE ENHANCE [ STANDARD ]
DRAM TIMING SELECT SPD [ AUTO ]
CHANNEL A - B [ AUTO ]

\Advanced Voltage Settings/
MULTI-STEPS LOAD-LINE [ LEVEL 5 ]
CPU VCORE [ 1.340V ]
QPI/VTT VOLTAGE 1.050V [ 1.190v - 1.20v ]
SYSTEM AGENT VOLTAGE 0.920V [ AUTO ]
DYNAMIC VCORE [ AUTO ]
GRAPHICS DVID [ AUTO ]
CPU PLL VOLTAGE 1.800V [ 1.750-1.800V ]
DRAM VOLTAGE 1.500V [ 1.550-1.625v ] ( LOWER OR HIGHER DEPENDING ON MEMORY REQUIREMENTS )
DRAM VREF 0.750V [ AUTO ]
DRAM TERMINATION 0.750V [ AUTO ]
CH-A/B ATA VREF 0.750V [ AUTO ]
CH-A/B ADDRESS VREF [ AUTO ]

\Advanced Bios Settings/

QUICK BOOT - [ DISABLED ]
BOOT LOGO - [ DISABLED ]

\Misc Settings/

ISOCHRONOUS SUPPORT [ ENABLED ]
VIRTUALIZATION TECH [ ENABLED ]
Click to expand...
 
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I have tried those settings mate, and where i thought it was stable, it then BSOD on me.

I have now set DRAM to 1.5v in the BIOS, but looking at CPU-Z it shows registering as 1.65v??? Touch BIOS also shows 1.5v
 
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