Overclocking locked i5-2500

Deehjay · 20 Sep 2014 at 00:07

Amateur overclocker here just wanting to ask some questions regarding my locked 2500.

- What number should I set the ratio to in the BIOS. I read up that with a locked processor you can still overclock a max of 400mhz than the highest base turbo frequency. The turbo frequency for the 2500 is 3.7ghz, so should I set the ratio to 41 in the bios?

- Would this be stable with a Raijintek Aidos? It's only a £15 cooler so I'm not entirely sure.

The chip is 3 years old.

Thanks

wazza300 · 20 Sep 2014 at 00:29

set it to highest it will go on the bios,the rest of the oc would be done through the bclk

maybe 104-105 would be your limit

cooling should be ok same as voltages

Deehjay · 20 Sep 2014 at 00:31

So do I have to adjust more than just the ratio in the bios? I watched a video and he literally just changed that number, and that number only.

wazza300 · 20 Sep 2014 at 00:32

you can if you want,but a locked cpu multi wont go any higher than the max ratio

you can oc a little further by raising the bclk

Deehjay · 20 Sep 2014 at 00:36

Ah I see! I think I'll just keep it at that for now, don't wanna blow anything up

wazza300 · 20 Sep 2014 at 00:45

you wont,you can safely oc the bclk to around 103-105

Deehjay · 20 Sep 2014 at 10:43

wazza300 said:
you wont,you can safely oc the bclk to around 103-105

How much more will this allow me to overclock it?

I changed the ratio to 41, and all seems to be fine so far, how much more can I get out of it?

wazza300 · 20 Sep 2014 at 10:46

41x103bclk = 4.223ghz oc

Deehjay · 20 Sep 2014 at 10:49

wazza300 said:
41x103bclk = 4.223ghz oc

I see. Should that still be fine on my budget cooler yeah?

wazza300 · 20 Sep 2014 at 11:50

should be you would need to test

Deehjay · 21 Sep 2014 at 00:17

Managed to get up to 4.017ghz with 103 bclk. Is sitting around 3.91ghz and flickering up to the aforementioned. Temps seems to be fine I think - hovering at around 45. Should I try and go a bit further?

wazza300 · 21 Sep 2014 at 00:19

what multi you using? 41x?

you can if you want but it will blue screen around the 105bclk and beyond mark

Deehjay · 21 Sep 2014 at 00:21

Yeah the ratio is set to 41. It seems a bit weird that it won't actually go up to that speed though? I have that set to 41 and the bclk set to 103 like you recommended before but it doesn't seem to go up to 4.22 like you mentioned before.

wazza300 · 21 Sep 2014 at 00:23

I think it only boosts to 41x if one core is needed/used

think 38x is max multi for that cpu not sure

ALXAndy · 21 Sep 2014 at 01:42

http://forums.vortez.net/overclocking-cooling/5109-how-overclock-non-k-intel-cpus.html

You've got four bins basically and that's it.

Also, I would be careful with the FSB it can lead to data corruption/loss if you're not careful so don't be doing it with an OS you don't want to lose.

wazza300 · 21 Sep 2014 at 01:45

I ran a cheap Pentium at 105bclk just fine,didnt have it corrupt the os

maybe if it crashed badly it would happen due to pushing bclk too far

ALXAndy · 21 Sep 2014 at 02:01

wazza300 said:
I ran a cheap Pentium at 105bclk just fine,didnt have it corrupt the os

maybe if it crashed badly it would happen due to pushing bclk too far

I got mine to 108 when I wrote that guide, then I pushed it to 109 and killed my boot sector and it took three hours for Windows to do the repair.

Just know - it's possible. Everything on 1155 is tied to the bus.

wazza300 · 21 Sep 2014 at 02:02

yh I found it to be unstable once past 105bclk so left it at that

Deehjay · 21 Sep 2014 at 11:59

Turned the bclk up to 104.1, don't think I'll be going further as I don't wanna take any risks, it seems to be fine at the mo. Sitting mostly at 3.95ghz for the majority of the same and flickering up to 4.05ghz.

ALXAndy said:
http://forums.vortez.net/overclocking-cooling/5109-how-overclock-non-k-intel-cpus.html

You've got four bins basically and that's it.

Also, I would be careful with the FSB it can lead to data corruption/loss if you're not careful so don't be doing it with an OS you don't want to lose.

Does this mean that 3.95ghz is pretty good for the chip that I have?

ALXAndy · 21 Sep 2014 at 12:24

Deehjay said:
Turned the bclk up to 104.1, don't think I'll be going further as I don't wanna take any risks, it seems to be fine at the mo. Sitting mostly at 3.95ghz for the majority of the same and flickering up to 4.05ghz.

Does this mean that 3.95ghz is pretty good for the chip that I have?

Yeah. That's about spot on. It's as close to 4ghz as you're ever going to get with a non K