i2700k OC on ASUS P8Z68 - Speeds seem wrong

[Pentacore]

Hi all,

Just upgraded to a new mobo, and am trying to OC it. I don't have a lot of experience with this stuff. My last mobo, an ASUS P5NE-SLI, had a mode in the BIOS to set to 20% OC, which always worked fine for me. For my new mobo, I was following this guide.
http://www.pureoverclock.com/printer.php?action=review&id=1280&page=11

What I am confused on is despite trying multiple ways to OC, just as outlined in that guide, my reported CPU speed never seems to change as shown in the guide above, and in other user's pictures of CPUz I've found online. In fact, mine shows a speed far less than what it should show. Take a look at my CPUz screenshot. Shouldn't my Core speed show 3500, and not 1648? Why is my multiplier showing at 16 instead of the 43 or so it should be?
http://i43.tinypic.com/344rtah.jpg I'm using the latest version of CPUz.

Following the guide above seems like this should all be so simple. Also, on my last PC, any OC I did to speeds was reflected in Computer Properties System next to Processor, where it would show Intel Whatever @ 3.0Ghz (3.8Ghz) - showing my OC speed in parenthesis. This was on XP. Shouldn't Win7 also reflect any speed changes as well? So far, my 2700k shows as @ 3.50Ghz despite any attempts to change speeds.

Thanks all for any help. I'm pretty confused.

 

[amdhunter]

I just went through this 2 days ago. In my case the processor was throttling due to heat. You probably don't realize it because when you check the temps, they look fine. This is because the CPU is throttling to prevent heat buildup.

For me, disabling PROCHOT (Processor HOT) option in the BIOS fixed this. YMMV though. In my case, it was throttling because I left the voltage at unrealistic levels.

EDIT: Also, Windows 7 would reflect a different speed if you changed the bus speed, not the multiplier. It's dumb, but they probably do it to avoid scammers selling slower overclocked processors as something faster.

My 2500k at 4.5GHz says 3.3GHz (well...3.29GHz)

 

[Pentacore]

I just went through this 2 days ago. In my case the processor was throttling due to heat. You probably don't realize it because when you check the temps, they look fine. This is because the CPU is throttling to prevent heat buildup.

For me, disabling PROCHOT (Processor HOT) option in the BIOS fixed this. YMMV though. In my case, it was throttling because I left the voltage at unrealistic levels.

EDIT: Also, Windows 7 would reflect a different speed if you changed the bus speed, not the multiplier. It's dumb, but they probably do it to avoid scammers selling slower overclocked processors as something faster.

My 2500k at 4.5GHz says 3.3GHz (well...3.29GHz)

Thanks AMDHunter! I will try that.

In the time since I posted this, looking around online, some people advise to disable all the following in the BIOS, as they all relate to either throttling or power saving, both of which I'm not concerned with, because I need full power at all times.

"You have to disable all of the options. There's Speedstep, C1E support, C1/C3/C6 states. Also look for any power saving features and turn them off as well."

Thoughts?

 

[Pentacore]

So after disabling speedstep, hyher-threading, turbomode, C1E support, C1/C3/C6 states, and setting AI Tweaker to Manual, CPUz now shows as I would expect it to show. It appears now more throttling is going on. CPUz now shows a solid Core Speed, which now reflects my OC to 4.4Ghz. Hopefully, it remains stable here, as I won't try to push it any harder.

Here is what my CPUz looks like now after all the changes:

http://i42.tinypic.com/10drwax.jpg

Does that look ok? All I did was change the cpu multiplier and core voltage.

Thanks all!

 

[amdhunter]

Looks good. Now go stress test a little bit and see if the temps/stability hold up. See the sticky up top.