Bios and CPUz FSB dont match, Which is correct

[50bmg]

CPUz says that my FSB is 266Mhz. The bios says 400Mhz.

So the system only hits 2.5G at 9.5x. It should be 3.8G at 9.5x.

Which is right; cpuz or the bios?

 

[dagger]

If it returns to normal when the cpu is under load, it's due to speedstep. One type decreases multiplier, the other lowers fsb. You can disable both in bios.

 

[Guest]

Forget it, it's all good...
WHen you're at Idle-your system saves energy..and when it's at full load it it meets your desired needs.

Try to load it casually with Prime 95 or 2004(beta)
and check for the CPU-Z change, *while test is ran*.

 

[50bmg]

The results i listed above are from prime95. At load cpuz says it is 266mhz fsb x9.5 = 2.5G.

I didnt have speedstep disabled before and cpuz had it at 400mhz fsb x9.5 = 3.8G.

Nothing has changed. I even flashed my bios to the latest version. That didn't even help.

 

[Mondoman]

Please post a screenshot of the main screen of CPU-z; there are many readings there, and sometimes they get misinterpreted.

 

[50bmg]

 

[50bmg]

The bios is showing 3.8G @ 400Mhz fsb.

As you can see above, cpuz show otherwise.

 

[dagger]

There are two types of speedstep throttling. C1E drops multiplier, EIST drops FSB. Looks like C1E is off, but EIST is on. Go into bios and turn it off.

 

[50bmg]

I turned off, both speed step settings in the bios. cpuz still shows, 266Mhz fsb x9.5 = 2.5.

 

[50bmg]

i need some ideas on the problem.

 

[50bmg]

bump

 

[gradius]

Has anybody figured this out? I'm using an XFX nforce 750i motherboard, I have a C2D E8500 and I've got the same problem. EIST is disabled for me in bios, but it doesn't seem to matter as I can't go above the stock speed even with prime95.

 

[jsc]

50bmg, I'd say that CPU-Z is correct. I think you are dropping out of an overclock state and defaulting to a stock FSB freq.

System specs? And what have you done so far?

 

[henydiah]

Disabled Vandep technology in BIOS ...!