i5 2500k unable to get past 4.2ghz

corkyo4

corkyo4

corkyo4

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Hi all,

just dropped an i5 2500k cpu in to my asrock fatal1ty performance Z77 mobo. Following a basic guide on here (http://www.overclockers.com/forums/...Beginners-How-to-set-your-25-6-700K-to-4-5Ghz) to overclock, the result was my pc wouldn't even boot to the bios. So I took the battery out to reset cmos.

I went back a step and only changed the multiplier, leaving everything else at default settings, long story short I can get to 42 but 43 and above just freezes at windows boot screen.

Had another play and found simply disabling speedstep prevents my pc from booting to bios again at any modified multiplier setting.

Any suggestions on how to reach 4.5ghz that so many of these chips seem to reach? Or even just to disable speedstep.

My spec is
16gb corsair vengeance DDR3 1600mhz 10-10-10-27
Intel i5 2500k 3.3 ghz
Asrock fatal1ty performance Z77 mobo
2 x MSI radeon r9 270x in crossfire config
couple of SSD's and a 320gb HDD
Corsair H80 Hydro watercooler

At present the CPU reaches about 50C under load.

Ideally I'd like to disable speedstep to keep the CPU at OC speed.

Please don't tell me I am in the 5% of cpu's that wont get there.

Thanks

Tom
 
Use this as a very rough guide as it's a completely different motherboard

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 [33X]
PWN FREQUENCY CONTROL [ AUTO ]
INTERNAL CPU OVER CURRENT PROTECTION [ AUTO ]
INTERNAL CPU PLL OVERVOLT [ ENABLED ] ( THIS IS VERY IMPORTANT FOR ABOVE 4.5 )
RATIO CHANGES IN OS [ DISABLED ]
INTEL BOOST TECH [ ENABLED ]
RATIO 1 - 4 [ 46 ]
TURBO POWER LIMIT [ 500 ]
CORE CURRENT [ 300 ]
CPU CORES ENABLED [ ENABLED ]
CPU ENHANCED HALT C1E [ ENABLED ]
C3/C6 STATE SUPPORT [ AUTO ]
CPU THERMAL MONITOR [ AUTO ]
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 [ QUICK ] ( My memory is 9.9.9.27 2T ) Yours is (10-10-10-27) - Make sure to select 2T CMD for stability
CHANNEL A - B [ AUTO ]

\Advanced Voltage Settings/
MULTI-STEPS LOAD-LINE [ LEVEL 6 ] ( This may be different on your CPU )
CPU VCORE [ 1.360V ] - ( TEST WITH PRIME 95/INTEL BURN TEST AND THEN LOWER THE VOLTS UNTIL UNSTABLE TO FIND YOUR LOWEST STABLE VOLTAGE )
QPI/VTT VOLTAGE [ 1.19V ]
SYSTEM AGENT VOLTAGE [ AUTO ]
DYNAMIC VCORE [ AUTO ]
GRAPHICS DVID [ AUTO ]
CPU PLL VOLTAGE [ AUTO ]
DRAM VOLTAGE [ 1.645v ] ( LOWER OR HIGHER DEPENDING ON MEMORY REQUIREMENTS )
DRAM VREF [ AUTO ]
DRAM TERMINATION [ AUTO ]
CH-A/B ATA VREF [ AUTO ]
CH-A/B ADDRESS VREF [ AUTO ]

\Misc Settings/

ISOCHRONOUS SUPPORT [ ENABLED ]
VIRTUALIZATION TECH [ DISABLED ]

\Advanced Bios Settings/

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

\Power Management/

HPET SUPPORT [ ENABLED ]
HPET MODE [ 64BIT ] - 64bit windows versions

\Pc Health/

CPU SMART FAN CONTROL [ DISABLED ]
Click to expand...
 
Last edited:
I'm used to run my 2500k on the following:

Keep all power saving and C states enabled
Set LLC to Level 3 or High
CPU vcore offset to +0.030v

I used the XMP profile for running my RAM at 2133 and it was fine. I dropped a 2600k in there using the same settings and no issues also.
 
Ok I had to create a new account as I can't remember my original password to corkyo4 and the password reset link doesn't work and emailing the mods hasn't yet resolved it.


I followed this guide to the letter (http://www.overclock.net/t/1198504/complete-overclocking-guide-sandy-bridge-ivy-bridge-asrock-edition) having a similar mobo and the same i5 cpu

Well i managed to atleast boot to the windows logo, but it froze from that point.

It seems speedstep is the key to booting past the bios screen and not booting past it, so I have decided to leave it enabled (and the guide above also leaves it enabled).

So i set to 4.3ghz but I can't boot past the windows logo, I have tried upping the voltage offset to +0.035 and lowering to -0.035 neither worked. I have tried all of the suggestions above, none have worked.

I even started going through and putting individual settings back to auto, to the point where all I had was a multiplier of 43 and everything else on auto/default settings and again no success.

Seems I just cant boot past the windows logo. I tried a fixed voltage of 1.35v with everything on auto/default and this didn't work, just the windows logo. I am happy to increase voltage within the limits but how far do I go...? Seems in cpuid I get a peak of 1.405v under prime burn test at 4.2ghz (this being on auto/default settings in the bios with a multiplier of 42)

Any suggestions because I am stumped, I would have thought I could at least boot up, even if it wasn't stable under testing.


By the way is LLC high a setting of 1 or 5?

Thanks

Tom


EDIT: I have now passed the 4.2ghz glass ceiling.
 
Last edited:
Ok well it seems I have actually managed to get to 4.5ghz

settings I changed

multiplier to 45
spread spectrum disabled
internal pll voltage enabled
xmp profile 1
cpu LL calibration to 3

everything else on auto/default

I ran prime for an hour (i appreciate it should be run for a lot longer) just to see where my temps and voltage would get to.

temps on all cores floated around 55-60c with a peak in core 1 of 70c

vcore voltage floated around 1.344-1.352 with a peak of 1.368

so in terms of refining voltages, any suggestions? Fixed or offset? what values?

Thanks

Tom
 
I'm lazy so prefer the ease of fixed voltage. But if you can put the time and effort in then there is no harm in using offset. Just make sure that you monitor it and don't let it get too high (1.4v+).

Also once you are happy with your OC run it overnight for a few nights using different stress test tools (OCCT, IBT, Prime etc...)
 
I have noticed a lot of questions about the I5 2500K processor at the moment :)

Also to note i can tell you from experience that the 2500K can take a fair few volts, as i have "played" with mine and also on this thread - I5 2500K MAX OC - testing the voltage.

1.36v is pretty low for 4.5ghz so well done there, but dont be afraid to ramp up the volts, as i have said in a couple of other discussions now, 1.40v is a good area to start if you want to see figures around the 4.8ghz mark, plus as others have also read, i run 5.00ghz at 1.42v stable.

The other issues with this are your temperatures, what cooler are you running?

Keep us updated as i enjoy reading about the 2500k :D hope this helps :)
 
Disco_P said:
Everyone loves the 2500K, £160 3 year old CPU that has no issues running with a big boy GPU.
Click to expand...

Loving mine after killing my 3470, got 2500k on a budget and it fantastic :D
only down fall no PCI-e 3

as for Oc'ing i am fining that you need to set V Core to 1.45 and work down after setting multi.
 
P4Clock said:
Loving mine after killing my 3470, got 2500k on a budget and it fantastic :D
only down fall no PCI-e 3

as for Oc'ing i am fining that you need to set V Core to 1.45 and work down after setting multi.
Click to expand...

Your situation is so "weird" i mean, V core at 1.45, i have never been that high, ever :D i would try it now, but my cooling is unsufficient, water cooling fail, not enough radiators :( :o
 
my 2500k only requires 1.28v for 4.5ghz 24 hr prime stable, and I run 24/7 5ghz at 1.38v 24 hr prime stable, and iv had it at 5ghz for hmm 2 years or so now :)

Iv gone to the extreme once and I had it at 5.45ghz but it required 1.48v which hmm bit too high for my liking, couldn't get it to boot at 5.5ghz but wasn't going no higher than 1.48v, though that was back on air with my old p67 board would have probably popped at 1.5v, now I have a z77 and water cooling, I guess I could probably get 5.5 stable for 24/7 but meh, Will save that for a rainy day :p
 
IceShock said:
my 2500k only requires 1.28v for 4.5ghz 24 hr prime stable, and I run 24/7 5ghz at 1.38v 24 hr prime stable, and iv had it at 5ghz for hmm 2 years or so now :)

Iv gone to the extreme once and I had it at 5.45ghz but it required 1.48v which hmm bit too high for my liking, couldn't get it to boot at 5.5ghz but wasn't going no higher than 1.48v, though that was back on air with my old p67 board would have probably popped at 1.5v, now I have a z77 and water cooling, I guess I could probably get 5.5 stable for 24/7 but meh, Will save that for a rainy day :p
Click to expand...

haha i wanna see proof of this :D 1.38v at 5ghz :D please :)
 
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