how to oc 2500k on gd65 via bios

panyan · 20 Apr 2011 at 10:29

right then, i have been running this machine at stock for about a week without any stability issues, so want to start to move into a bit of overclocking. My temperatures hover around 30 at idle and max out at about 48.

I have read that oc genie 2 is good, but it is better to change the values yourself because you have more control and are gaining that experience

i want to ask, what am i meant to be turning off/on, what am i meant to be increasing/decreasing and what are the max voltages and temps i should be looking out for?

extra info on project log: http://forums.overclockers.co.uk/showthread.php?t=18259043

(p.s. i think that sticky needs to be a bit more noob friendly :/)

Surveyor · 20 Apr 2011 at 17:58

Guide here for the GD55 which will operate the same as the GD65:

http://www.bit-tech.net/hardware/cpus/2011/01/07/how-to-overclock-the-intel-core-i5-2500k/5

I wouldn't increase your DRAM voltage as your XMS3 should work at around 1.5V.

panyan · 20 Apr 2011 at 18:21

Surveyor said:
Guide here for the GD55 which will operate the same as the GD65:

http://www.bit-tech.net/hardware/cpus/2011/01/07/how-to-overclock-the-intel-core-i5-2500k/5

I wouldn't increase your DRAM voltage as your XMS3 should work at around 1.5V.

on the ram sticks it says 1.65V :confused:

Surveyor · 20 Apr 2011 at 18:42

panyan said:
on the ram sticks it says 1.65V

With Sandybridge you need to keep the RAM voltage as low as you can.

From OcUK re Sandybridge:

Recommended memory voltage is 1.50v, so make sure to run your memory at 1.50v, higher could limit lifespan of the CPU

There are plenty of people on this forum running that RAM at around 1.5V.

I would try it at 1.5V and if this causes instability increase it a bit at a time until you don't have any problems. You may need, say, 1.55V but keep it as low as you can.

For XMS3 OcUK say this:

1600MHz RAM Speed, CAS 9-9-9-24 Timings, 1.40-1.65v VDIMM

And this:

Sandybridge compatible (use sub 1.60v)

I use this RAM:

http://www.overclockers.co.uk/showproduct.php?prodid=MY-105-GL&groupid=701&catid=8&subcat=1517

It says 1.60V on the label but it runs fine at 1.50V

panyan · 22 Apr 2011 at 22:37

^ legend, thanks

Surveyor · 22 Apr 2011 at 23:52

You're welcome.

I pinched your comment for my sig.

panyan · 30 Apr 2011 at 22:54

im sorry to dig this thread back up, but i finally got the bottle to go through with this

the guide told me to change a lot more things than what people on here suggested (just whack up the multiplier)

anyway, this is the first time ive EVER overclocked -

are the temps good? the voltages? etc

thanks

Kaeo · 1 May 2011 at 04:17

Looks pretty good. You can whack Blck to 100 instead of 99.8 though

Would get you 4.5 hehe. Looking good for that voltage though, nice nice.

Edit: Was your first time too

Grats, well done.

panyan · 1 May 2011 at 09:22

1) in the bios, it is set to 100mhz

2) is the voltage too low?

3) what would i need to do to try and get 4.8-5ghz?

4) what do i use to test stability?

thanks

EDIT: i just ran 7 hours of fah gpu tracker v2 at 100% the whole time and nothing crashed - so im happy

oliver2601 · 2 May 2011 at 04:00

panyan said:
1) in the bios, it is set to 100mhz

2) is the voltage too low?

3) what would i need to do to try and get 4.8-5ghz?

4) what do i use to test stability?

thanks

EDIT: i just ran 7 hours of fah gpu tracker v2 at 100% the whole time and nothing crashed - so im happy

To get to 4.8-5 you would just need to turn the multiplier up and increase the voltage until it can pass the stability test (usually Prime95 for 4 hours)... also monitor temperatures, if they go to the 70 mark then reduce voltage, and if this means you can't have a stable overclock then reduce multiplier.

Surveyor · 2 May 2011 at 06:24

Disable Spread Spectrum and this will make the Base Clock 100 rather than 99.8.

To get to 4.8GHz on a 2600K this is what I changed:

CPU multiplier 48 (I actually used Turbo Boost but I assume you're using the multiplier in which case disable Turbo Boost)

CPU voltage 1.365

CPU I/O 1.27

CPU SA (memory controller) 1.03

CPU PLL 1.8

Max. CPU Power 255

I haven't tweaked any voltages yet to see if they will go a bit lower.

I kept the power saving features (EIST, C-states etc.) on.

panyan · 2 May 2011 at 13:49

Surveyor said:
Disable Spread Spectrum and this will make the Base Clock 100 rather than 99.8.

i'll do this to my current overclocking profile and save that as profile 1 (what i am currently on) - thanks

Surveyor said:
To get to 4.8GHz on a 2600K this is what I changed:

CPU multiplier 48 (I actually used Turbo Boost but I assume you're using the multiplier in which case disable Turbo Boost)

CPU voltage 1.365

CPU I/O 1.27

CPU SA (memory controller) 1.03

CPU PLL 1.8

Max. CPU Power 255

I haven't tweaked any voltages yet to see if they will go a bit lower.

I kept the power saving features (EIST, C-states etc.) on.

thanks for the settings - what is this about multipliers and turbo boost?

(I actually used Turbo Boost but I assume you're using the multiplier in which case disable Turbo Boost)

- ummm, i changed the "CPU ratio Multipler" to 45 from 33 in the bios - as per the instructions you posted in an earlier comment - i am confused now :confused:

Surveyor · 2 May 2011 at 14:11

panyan said:
i'll do this to my current overclocking profile and save that as profile 1 (what i am currently on) - thanks

thanks for the settings - what is this about multipliers and turbo boost?

(I actually used Turbo Boost but I assume you're using the multiplier in which case disable Turbo Boost)

- ummm, i changed the "CPU ratio Multipler" to 45 from 33 in the bios - as per the instructions you posted in an earlier comment - i am confused now

Different ways of doing the same thing.

I overclocked mine without reference to that guide so did it in a slighly different way.

I changed all the Turbo Boost multipliers to 48 but changing the CPU ratio Multipler to 48 has the same effect.

Don't worry about it and carry on as you are.

panyan · 2 May 2011 at 15:07

Surveyor said:
Different ways of doing the same thing.

I overclocked mine without reference to that guide so did it in a slighly different way.

I changed all the Turbo Boost multipliers to 48 but changing the CPU ratio Multipler to 48 has the same effect.

Don't worry about it and carry on as you are.

ah, alright, ok - thanks

i have just done another stability test, i ran prime95 blend for an hour (i dont need super-stability) with no errors or warnings so i think i will save profile 1 with the spectrum thing off as profile 1 "4.5GHz stable"

and then try your 4.8ghz as a profile 2

oliver2601 · 2 May 2011 at 15:13

panyan said:
ah, alright, ok - thanks

i have just done another stability test, i ran prime95 blend for an hour (i dont need super-stability) with no errors or warnings so i think i will save profile 1 with the spectrum thing off as profile 1 "4.5GHz stable"

and then try your 4.8ghz as a profile 2

Make sure those temps don't go too high... would aim for 4.7 first.

Surveyor · 2 May 2011 at 17:26

No need to go mad other than for e-peen.

Going higher and higher isn't going to do anything for gaming.

For stuff like video encoding going from 4.5Ghz to 4.8GHz might reduce encoding times by a few % but it isn't worth stressing your system and processor too much for.

A nice stable overclock of 4.5-4.6GHz is plenty for normal use.

panyan · 2 May 2011 at 18:37

Surveyor said:
No need to go mad other than for e-peen.

Going higher and higher isn't going to do anything for gaming.

For stuff like video encoding going from 4.5Ghz to 4.8GHz might reduce encoding times by a few % but it isn't worth stressing your system and processor too much for.

A nice stable overclock of 4.5-4.6GHz is plenty for normal use.

i was thinking of staying at 4.5GHz anyway

tell me what you think of this - i have been running 6 hours of f@h at 100%, an hour of prime95 blend and lots of gaming, and when i went to lunch and the machine was sitting idle, it BSOD'd with error core #124 :confused:

Surveyor · 2 May 2011 at 19:30

Strange that it happens at idle but it is a hardware related issue:

http://www.sevenforums.com/crash-lockup-debug-how/35349-stop-0x124-what-means-what-try.html

Try backing off on the overclock and see what happens.

If this cures the issue then you know the overclock wasn't quite stable and you'll need to keep it a bit lower or try adjusting the settings to get it stable.

Ensure your memory timings are set at 9-9-9-24 for 1600MHz.

What RAM voltage are you using? Perhaps you need a touch more.

panyan · 2 May 2011 at 20:43

Surveyor said:
Strange that it happens at idle but it is a hardware related issue:

http://www.sevenforums.com/crash-lockup-debug-how/35349-stop-0x124-what-means-what-try.html

Try backing off on the overclock and see what happens.

If this cures the issue then you know the overclock wasn't quite stable and you'll need to keep it a bit lower or try adjusting the settings to get it stable.

Ensure your memory timings are set at 9-9-9-24 for 1600MHz.

What RAM voltage are you using? Perhaps you need a touch more.

i have temporarily gone back to stock, these are my "overclocking profile 1" settings:

i have had two #124 BSOD today

Surveyor · 2 May 2011 at 23:38

Just looking at you settings :

1. Change internal PLL Overvoltage from Auto to Enabled.

2. Change DRAM timing mode to linked and you can set the timings manually to ensure they are correct.

3. CPU I/O voltage is lower than the 1.27 I used.

4. CPU PLL voltage should be changed from Auto to around 1.8

5. DRAM voltage is a little low at 1.472 - you can increase this to around 1.5 or a little more to stabalise your RAM.

6. Change long duration and short duration power limits to 255.

Those are the settings I used for 4.8GHz.

You may be able to get stable at 4.5GHz with slightly lower.