i5 Newbie Overclock.

will0812

will0812

will0812

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Joined
23 Nov 2009
Posts
239
Hi, ive never overclocked anything before but i believe its fairly simply with the i5. Firstly does IBT 2.4 work with windows 7 64bit? as sites say its only compatible with win xp/vista but id like to use IBT for stability tests as i raise the frequency.

The overclock though, for tonight i think id just like to get it to 3.2 Ghz which is fairly low, and i might be able to do this on stock voltage although im not completely sure what the stock is. But mainly my question is apart from raising the FSB and vcore voltage, what else do i need to raise / keep an eye on Currently my ram which is geil ultra series is only running at 1333mhz, but this is with all settings at auto, so i think there is room there so i dont need to worry too much about the ram being taken too high. Also my mb has software that means you can OC whilst in windows, will it be ok to use this?

Any advice of voltages / fsb would be nice

Thanks, Will
 
First off you need to disable some of they energy saving features that your chip and motherboard have.

1. Disable Intel Speedstep Tech, C-State Tech and C1E Support

2. Set your voltages to:
Vcore - 1.3v
IMC - 1.25v
DRAM - 1.65v
PLL - 1.8v
PCH - 1.05v

3. Enable Load-Line Calibration

4. Change your cpu multiplier to 20

5. Set your BCLK to 160

6. Set your ram to the rated speeds or as close as your motherboard allows it, dont set it higher than 1333Mhz as this might cause stability issues! :eek:

7. Your ram timings are very important, set them to their rated latency eg. 7-7-7-24

8. Boot into windows, run IBT or Prime95 Blend and test for 5+ hours. Watch out for temps above 75C. Any higher stop IBT or Prime95. Use RealTemp or CoreTemp to record CPU temps. :)

IBT works fine on Windows 7 64-bit.

I don't recommend using windows software to OC it's best done by hand and in the bios.

If you are still using the supplied intel cooler DO NOT OC. The cooler is pants and you will most likely damage your chip! ;)
 
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Im using magahelm with two apaches in push pull. My ram is rated at 2133mhz at 9-9-9-28 timings, so it should be fine above 1333, but do i need to change the ratio between FSB and DRAM ? Also in Cpu-Z what is the NB Frequency on the memory page? Id also quite like to keep speedstep etc on if possible, if turbo is enabled sometimes my multiplier on cpu-z goes to x24 when needed, is this correct?
 
Your cooler is very good, you should be able to get +4GHz no problemo :)

If you know what your ram is rated to run at then thats what you should be running.

Changing the ratio of FSB (BCLK) AND DRAM is different on some motherboards, just use a little comon sense here and there and you should get it right. ;)

The NB Frequency I believe is your DMI (Direct Media Interface). It's the same as QPI on X58 boards.

Speedstep can cause problems when overclocking but most of the time it should be OK to use. The whole point on OCing is to gain performance so I dont see why you would want to be saving a tiny fraction of energy by enabling Speedstep.

If you enable turbo then yes your multiplier will go up to 24.
(Default speed)133x20=2.66GHz
(Default speed with Turbo ON)133x24=3.2GHz
 
Yea its just that when you change fsb to increase cpu, it can also increase ram speed and it can go too far if your not careful i think.

Do i need to pay attention to my NB Frequency ?

Id like to have speedstep so that the cpu isnt constantly running 4Ghz or so.

I think my ideal setup would be for it to be 4Ghz when turbo has kicked in, so i think an Fsb of around 170, is it possible to get a stable fsb of 170 with turbo and speedstep enabled?

Would like to get:
(Idle) - 170 * 9 = 1.53 GHz
(Load) - 170 * 21 = 3.57 GHz
(Turbo) - 170 * 24 = 4.08 GHz

Whilst running games i assume turbo would kick in?

Thanks for all your help :)
 
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