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Core i5 2500K overclock

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dipsta

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Joined
Aug 3, 2008
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Location
Yorkshire UK
System Specs
System Name Dark Sideslayer
Processor Core i5 2500k @5.0GHz @13.84v
Motherboard ASRock Z68 Extreme4 Gen3
Cooling MCps655 Pump, XSPC Res, RC360 Rad, EK-Supreme HF Acetal+E
Memory CORSAIR VENGEANCE 8GB (2X4GB) DDR3 PC3-15000C9 1866MHZ DUAL CHANNEL KIT
Video Card(s) ASUS Direct CU II 1.2v 930/1360
Storage 60gb OCZ Agility 3, 40gb Kingston V Series & 2*500 sata
Display(s) Samsung SyncMaster 245B plus
Case COOLERMASTER RC1100 COSMOS SPORT customised
Audio Device(s) Realtek THX Onboard
Power Supply Coolermaster Real power 700W
Software Windows 7 Ultimate 64
Benchmark Scores 3d Mark Vantage 22491, 3d Mark06 32242, PC Mark 07 5398, 3d Mark 2011 5983, PC Mark Vanatge 24541 :0
Hey guys i was wondering if you can help, i am currently on an Asrock extreme 4 gen 3 motherboard, and have the overclock set to auto 4.8... i am happy enough at the stablity running prime for 12 hours with no crashes, but don't really understand the manual overclock settings, can someone please look at my screenshot and advise.. thanks

i am trying to keep the same clock but lower the vcore slightly what do i need to do to the other settings please note everything in the bios pretty much is set to yes.. i will reboot take pics with my phone and repost the bios settings.. thanks.


overclocksettings.png
 
heres the motherboard settings

IMG_2352.jpg

IMG_2353.jpg

IMG_2354.jpg

IMG_2355.jpg
 
You should set the OC method to manual and set your multiplier same as what you had on AUTO OC settings then start decreasing the Vcore slightly and boot to Windows, make some stability test run and rinse n repeat until you can find the point at which you can't boot Windows anymore, when you've found that go back to the last setting that was stable and call it a day :)
Just don't touch the BCLK, it isn't worth to on Sandy Bridge.
 
cheers mate what about all the other 10 odd voltage settings? pll etc,,, should i touch those?
 
No don't touch them, you won't need anything different than Vcore to overclock a multiplier unlocked CPU that's why it is so easy to :)
The only voltage setting you might need is the VDDQ (Ram Voltage) if you want to achieve lower latencies or higher clocks on your memory but just don't go over 1.65v, anyway memory overclocking on Sandy is not worthy to, the memory controller is already fast on its own :)
 
happy days i have used prime 95 for small ffts , do you suggest anything else? i.e occt?
 
If you really want to be sure your rig is stable use linX, I've yet to see something that stresses my CPU so much as that.
Intel Burn Test (IBT) is good too I think that is based on linX so either way use one of them and you'll be sure your system is stable just use atleast High or Very High settings
 
cheers mate... well before u toldd me what to do i did use occt for an hour with no issues at 1.362v@4800 which seems okay i'll try linX how do you know when an error has occured?
 
IBT will automatically tell you if your system is not stable because calculations did not give back correct results, this is if you are missing a bit of voltage.
If the CPU is more instable you are going to have a BlueScreen with a stop exception that should be: Stop 0x00000101 "A clock interrupt was not received on a secondary processor within the allocated time interval"
This is the most common, what you should read is Stop 0x00000101 : "Gief more Vcore :D"
 
ok mate i did a 10k test which finished in 4 mins without any errors now running a 20k test! :0) i think ive sussed it, how far and for how long should i go
 
bloody vdroop is dropping this to 1.272 at times which is far too low im guessing for 4800... any ideas? LLC to level 5?
 
Usually 5 pass at maximum memory is enough to say your system is stable, it all depends on you... there are some people that will say "oh no you must atleast run it for one day to know if it is really stable" but in reality if your cpu does 5-10 pass of IBT no application will ever make your CPU crash because IBT puts so much stress on your CPU that regular workload will never match.
 
right fella that is great thankyou for all your useful help, i shall post back and let you know how i get on, currently on 20k, 5 passes complete... gonna got for the big one now! temps at 63 max, so thats all good, and my vcore at 1.362max, drops to 1.272 lowest under load, but o crashes thus far! :0)....
 
radrok said:
Usually 5 pass at maximum memory is enough to say your system is stable, it all depends on you... there are some people that will say "oh no you must atleast run it for one day to know if it is really stable" but in reality if your cpu does 5-10 pass of IBT no application will ever make your CPU crash because IBT puts so much stress on your CPU that regular workload will never match.
Click to expand...

probably a bit of a noob question fella what is IBT?
 
intel burn test.. got it... lol sorry having a blonde moment! ... i have been using LinX 5 passes max memory all passed at 1.362V
 
Then congratulations, your system is stable :) 1.362V seems much better than the 1.4V you had before, lower temps and such
 
These are the settings I use 24/7. I suggest you se the bios for your overclocking. Turbo isn't necessary either.

111030141001.jpg

111030140931.jpg

111030141016.jpg


idle:
cpuidle.jpg


load:
loadcpu.jpg
 
brilliant mate, thanks i'll pop them in and give them a shot :0)
 
You will probablly want to change load line callibration to 4, maybe 3. :)
 
radrok said:
IBT will automatically tell you if your system is not stable because calculations did not give back correct results, this is if you are missing a bit of voltage.
If the CPU is more instable you are going to have a BlueScreen with a stop exception that should be: Stop 0x00000101 "A clock interrupt was not received on a secondary processor within the allocated time interval"
This is the most common, what you should read is Stop 0x00000101 : "Gief more Vcore :D"
Click to expand...
A small correction.

It is not the common BSOD code. most common due to unstable overclock is code 124, which means the CPU Vcore is too low in SB. (in previous platforms it can mean low VTT as well) especially, the BSODs when idle is infuriating. The only way I could fix it was by not using LLC, which means the Vcore is actually higher under smaller load.

Clock interrupt on secondary processor... is a bug commonly found in Asrock z68 extreme 4 (not sure on gen3). It happens only when u use the IGP. Goes away when u use a dedicated GPU. Increasing IGP voltage a tad might fix it. Couldn't test if it fixed on mine. I get that BSOD when running off the IGP.
 
Thanks guys currently still testing,
i managed to get stable at 0.05+ offset voltage at 4.8ghz max 67degrees c with 20 passes on max mem on LINX, and i'm now trying 0.065 @5.0ghz,
just a quicky what is Gt frequency? it is currently sat at 110-0 and the slider goes up to 3000 thanks in advance :0)
 
what difference will this make should i increase it? like i say its sat at 1100... thus far..
 
Do you use onboard graphics or a discrete card? If you use onboard, could boost performance slightly, if you use dedicated VGA card, adjusting it will offer you nothing.
 
right sorry, i have got it, its for the onboard graphics which i am not using, thus it can stay where it is... thank you.. :0)
 
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