Sandybridge BLCK overclocking

spixelspixel · 26 Jan 2012 at 13:52

I want to overclock my i3 2120 a bit. I know the only way is to overclock via blck but I'm not sure if its safe.

Checking on google I can't find too much info. My motherboard seems to think its ok as it has an option for auto overclocking which sets it to 103mhz . Others say it will kill all your components but is there any proof of this or just people guessing.

Quote from

http://www.clunk.org.uk/forums/over...-overclocking-guide-beginners.html#post110980

"If you have a CPU with a locked multiplier, it may be possible to squeeze a couple of hundred extra Megahertz out of it by using this method. You may have seen a few posts dotted around the internet claiming that BCLK overclocking will kill your CPU, well according to Asus and Gigabyte, this is not the case, and they have no idea why these things are being said. They also went on to say that in the months leading up to the Sandy Bridge launch, they tested hundreds of CPUs, but they had a very low failure rate, considering the abuse that they were subjected to."

So, is it safe or not?

Spenty · 26 Jan 2012 at 14:23

It's not advisable but I cant see how it would damage the components at all.

goodl · 26 Jan 2012 at 14:28

It is generally not recommended to even touch the BCLK, although I have read a couple of reports of BLCK overclocks of between 3% and about 6% stable. I believe this is because BCLK is linked to PCI-E speed, among others, and PCI-E will be the limiting factor in the overclock (although it is possible I misunderstood the reason, the fact is that most reports say increasing BCLK more than a couple of % can damage your board).

zx128k · 28 Jan 2012 at 10:06

As far as I can tell BCLK overclocks nearly everything, I would stay at default or only increase by a small amount.

caksey · 29 Jan 2012 at 08:13

I have had BCLK overclocked by 2.2% for the last 9 months without any issues!

jamesfreddie · 29 Jan 2012 at 16:12

caksey said:
I have had BCLK overclocked by 2.2% for the last 9 months without any issues!

What CPU do you have?

pgi947 · 29 Jan 2012 at 16:21

Try reading over this: http://www.clunk.org.uk/forums/over...-overclocking-guide-beginners.html#post110980

The guide is based around an i7 1155 but I'd presume it'd be the same for locked i3's as well.

IMO you 'should' be safe up-to around 103-105, I've had mine up to 107 intermittently (for max OC) and didn't hit any issues with the PCI lanes or memory.

It is worth mentioning that the memory is tied to the bclk, so before you do anything you may want to consider dropping the memory speed or increasing the voltage.

It's certainly not impossible, but heavily advised against.