2500k Overclock

thefogo

thefogo

thefogo

Soldato
Joined
20 Jul 2012
Posts
3,298
Location
Manchester
My 2500k is bottlenecking me hard in BF4, so I wanted to overclock it to above 4.5Ghz, maybe to 4.8Ghz. But I'm having trouble :o

I can't get it to boot over 4.5Ghz even with 1.4v, it keeps restarting and I get no display :(

I had it at 4.8Ghz last year for a short time so it should work. Can the chip degrade over time somehow?
Thanks in advance.
 
Mines the same. I got mine to 4.7 on the D14 hitting 66C max under prime.. mid-50's while gaming.

My chip couldn't do 4.8 at 1.38v, didn't try higher.
 
I need to use 1.48v for my stable clock of 4.80GHz :D

To be honest, I wouldn't recommend people to do this...the only reason I'm using this high voltage is that I'm just saying to myself "if the CPU or motherboard end up dying, it'll give me a good excuse to upgrade" :p

Seriously, don't use this high voltage unless you can afford to replace the parts if they break.
 
When I'm less busy (maybe over christmas) I might have another crack at upping the clock on my 2500k, but it was difficult to get anything over 4.5 without silly voltage. You might get 4.6 or 4.7 if you're lucky without too much trouble though!

Mine is on a corsair h70i, and temps are good at the moment. at 4.5ghz I'm running offset voltage at -.05 (i think, I know it's a negative offset though!)
 
Yep it's an excellent cooler :) Much better than my old Antec Kuhler 620.

Seems like only a few chips can do above 4.5Ghz at reasonable volts. I guess I'll have to save up for an upgrade :o
 
I was about to start my own thread on this exact topic! My 2500k is at 4.5GHz with offset voltage of -0.040 which I think translates to 1.320v at full load with my chip. It never goes above 55 in BF4 and about 60 in prime, this is with a Corsair H100 with 4 fans. Board is ASUS P8Z68 Deluxe.

I had been running this chip at 4.7GHz for the past 2 years with everything in BIOS on auto apart from PLL overvolt enabled. The only reason I switched down to 4.5GHz with manual settings is because when I checked the voltage I saw it was going over 1.4v at load which I wasn't so happy with. Since then I haven't been able to get stable over 4.5GHz but I guess that is just because I am not giving it enough volts, I'd like to aim for 5GHz and curious if anyone out there has achieved this stable?

I know each chip is different and of course mine might not be able to, looking at other results it seems I may need to apply close to 1.5v to get this high?!

I'm not massively worried about killing the chip, an excuse to upgrade right?
 
WalderX said:
I was about to start my own thread on this exact topic! My 2500k is at 4.5GHz with offset voltage of -0.040 which I think translates to 1.320v at full load with my chip. It never goes above 55 in BF4 and about 60 in prime, this is with a Corsair H100 with 4 fans. Board is ASUS P8Z68 Deluxe.

I had been running this chip at 4.7GHz for the past 2 years with everything in BIOS on auto apart from PLL overvolt enabled. The only reason I switched down to 4.5GHz with manual settings is because when I checked the voltage I saw it was going over 1.4v at load which I wasn't so happy with. Since then I haven't been able to get stable over 4.5GHz but I guess that is just because I am not giving it enough volts, I'd like to aim for 5GHz and curious if anyone out there has achieved this stable?

I know each chip is different and of course mine might not be able to, looking at other results it seems I may need to apply close to 1.5v to get this high?!

I'm not massively worried about killing the chip, an excuse to upgrade right?
Click to expand...
Does PLL overvoltage help? I have mine on auto.
 
I have mine 4.6 stable on around 1.3 with offset. I don't think there is much to be gained from differences over 4.5ghz. And apparently, high overclocks for long time do tax more than just the chip and mobo needs to be cooled as well so I personally would not keep higher OC for daily use. Just for the sake of trying though, why not? :)
 
WalderX said:
My 2500k is at 4.5GHz with offset voltage of -0.040
Click to expand...

With that negative offset you're basically telling your chip to undervolt by a fair margin and I'm guessing having to make up for this with a high LLC. If you have speedstep enabled I wouldn't be suprised if you had stability issues when running at idle or just browsing etc. Personally I'd aim for an offset as close to 0.00 as possible and as low an LLC as you can whilst maintaining stability. I'd suggest you could knock your LLC down a level and at the same time reduce your offset nearer to zero this should give you less voltage fluctuation at higher clocks and a more stable machine when not under load.
 
thefogo said:
Does PLL overvoltage help? I have mine on auto.
Click to expand...

Some guides say enable it, some say disable it. I set it to enabled purely based on the bios description saying "can enable extreme overclocking" or the such! I actually have it disabled now and still stable so none the wiser really. I have all the llc and cpu current options set to extreme, as per recommendation of a number of overclocking guides for my board and cpu.

setter said:
Agreed, for the op. It wont make any difference clocking the chip higher. Bf4 with multi gpu really needs an i7 cpu.
Click to expand...

Yeah I guess 4.5GHz is still very good for this cpu and I only have 1 card so it shouldn't be bottlenecking. I just cant help but tweak things!
 
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