e6750 with a mind of it's own...

Well, title pretty much sums it up. I took a quick video showing what it is doing:

http://s36.photobucket.com/albums/ [...] t=vid1.flv

What the hell would cause it to do this. It just really doesn't seem to want to run at it's proper speed. Any way to fix this? All input appreciated. Thanks.

-Pyro

EDIT: Sorry, vid is small, gotta zoom to see CPU speed.

Oh gawd...

Its normal. Speed Step is what does that. When it jumps theres a load on the CPU, when it returns to idle, it drops the multiplier and vcore to save power and reduce heat.

I just disabled Speed Step before this started happening, because even under load it would stay at 2 GHZ. So if I disable EIST and C1E it will fix it? What are the downsides of disabling these?

-Pyro

In my opinion, there is no downside of leaving it on. Unless your having some stability problem in an OC CPU.

Disabling EIST and C1E will stop it from changing. The downside is you loose the ability to reduce heat when its not being really used. You do get a small power savings as well, but that really doesn't matter much.

Even when you do OC, as long as you test it, speed step can help reduce heat when its not being used. Although in the past I thought it was best to disable it when OC since going from 1.8ghz to 3ghz was quite a shift. In my mind, I thought the system would freeze. I read that it wasn't the case, and even tested it myself.

With my system (E4400) OC to 3ghz and idle at 1.8ghz, my idle temps are mostly like stock speeds (so it actually should be 1.2ghz idle, 2ghz normal speed).