Overclocking my i5 2500k

[eNxy]

Yoyo,

I'm having a strange problem with my UD4... I used to be able to up my BCLK up a tiny bit from the default 1000 to 1005, so when I change the multiplier the overclock will sit pretty much bang on whatever my multiplier is. However, regardless of whether I change my BCLK up to down, it'll stay on 99.8Mhz?

So when I set a multiplier of 45x, the overclock when I boot into Windows is 4489-4490 MHz. Whereas normally if I set the BCLK to 1005, a 45x multiplier will boot into Windows as nearly exactly 4500 MHz...

Anyone have any idea why my BCLK refuses to change ?

Regards

 

[eNxy]

No idea ?!

 

[S_I_N]

sb is qwirky that way I have to set mine to 1002 in bios to have it boot to 100blck lol if you up the voltage for blck a tad it may boot to what ya set it at.

 

[Scoob]

Hi,

On my P67 and my Z68 board (MSI and ASUS respectively) I have a BCLK of <100, disabling Spread Spectrum let this stay rock solid at 100. Double check your BIOS settings & disable it if it's enabled.

This slightly low values seems to be normal when Spred Spectrum is Enabled, seen lots of reports of it.

Cheers,

Scoob.

 

[eNxy]

I think you guys are misinterpreting what I'm saying. No matter what value of bclk I set, CPU-Z will still tell me it's 99.80MHz. Even if I put it too 1050, it'll still boot up as 99.80MHz.

 

[Lollipop]

Does it matter? Try to clear CMOS

 

[eNxy]

Yes it actually matters a lot to me.

 

[Scoob]

Yes it actually matters a lot to me.

Have you updated the BIOS at all, possibly some update has changed how things work. My older cheap MSI P67 motherboard used to get features disabled with every new BIOS it seemed - I think they were trying to dumb it down to make the higher-end models look better as it was quite fully-featured at stock...though it didn't actually work that well lol.

Also, do try disabling Spread Spectrum if you haven't already - that should see to selecting 100 BCLK and getting 100 BCLK at least.

Still, a bit odd what you're experiencing for sure.

Best of luck.

Scoob.

 

[eNxy]

Have you updated the BIOS at all, possibly some update has changed how things work. My older cheap MSI P67 motherboard used to get features disabled with every new BIOS it seemed - I think they were trying to dumb it down to make the higher-end models look better as it was quite fully-featured at stock...though it didn't actually work that well lol.

Also, do try disabling Spread Spectrum if you haven't already - that should see to selecting 100 BCLK and getting 100 BCLK at least.

Still, a bit odd what you're experiencing for sure.

Best of luck.

Scoob.

Yeh I updated the BIOS from F4 to F5(latest) and I noticed now it's all "TouchBIOS" and I didn't like that - it kept changing my default speed to 37x instead of 33x. I went back to F4 then and for some strange reason now the default value for BCLK when I leave it disabled is 100.3Mhz instead of the old 99.8Mhz, don't know why, but at least when I enable it and change the value now it will follow my value, so if I set it the BCLK value to 1002, it'll boot into Windows with a Bus Speed of nearly bang on 100Mhz

Thanks for you help

P.S. My Gigabyte motherboard doesn't seem to have an option for Spread Spectrum. Either it doesn't have the option or Gigabyte have renamed it and I have no clue what it is

 

[Mumbles37]

I also have the UD4 and was using F5e bios for a while. Yeah the UD4 bios doesn't have a Spread Spectrum option.

You do have to be careful of that BCLK stuff because depending on the bios the default setting can be quite different. The first few BIOSs I had also did 99.8 while in Windows, making me set it to 1002 in BIOS. Maybe it was F5 that didn't. Now I'm using beta F6a and it also requires me to do 1002 in BIOS. Oh well, as long as it works somehow right?

Ah, and being under 100 can have ill effects. When I was at 99.8 my video card was only going at 8x instead of 16x link speed... apparently they require 100 BCLK to run full speed. Probably not a huge difference but it was at least a couple hundred points worth in stuff like 3dMark11. So I'm right there with you in not wanting anything less than 100.

 

[Scoob]

Hi,

Hmm, I guess it's a quirk of that particular board then...rather off there's no spread spectrum setting thought, I think I've had this on every board I've had for a few years now! Still, I generally buy Asus boards so I've not overly much experience with others.

Glad you've sorta got it behaving how you want now at least!

Cheers,

Scoob.