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Strange multiplier behavior - E6400

post #1 of 6
Thread Starter 
Hey guys

If this is in fact normal behavior I apologise in advance, but..

I just upgraded my motherboard from a crappy Abit SG-95.
The SG-95 had a rated FSB of 800Mhz, and wasn't fast enough for my E6400.
This meant my CPU rated @ 2.13 Ghz was limited by the board to a mere 1.6 Ghz.

Now after I installing the new board (an Abit IP-35), I re-installed XP and installed the chipset drivers. Now heres the weird bit...

When I go to Control Panel => System I am told the CPU is rated @ 2.13 and is running at 2.13 Ghz.

When I run CPU-Z, it is a different story; for most of the time, CPU-Z still reads I am at 1.6 Ghz, and my multiplier has DROPPED from x8 to x6. I observed CPU-Z for a while, and noticed that periodically, the multiplier jumps back up to x8 for less than a second, and then drops back down to x6.

Please correct me If I'm wrong, but surely this is not meant to happen? As I understood it, the FSB multi etc. are set in the BIOS and should not randomly change once the computer has booted.

I am going to double check my BIOS settings as soon as this download has finished.

Thanks a lot

-dissy
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BIT_CRUSHERRRR
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post #2 of 6
C1E/SpeedStep is in effect.

Laptops have this feature. For overclock, it is recommended to look at CPU-Z for your clock speeds. When C1E/SpeedStep is enable, when you are idle, your multiplier will drop down and it'll make your CPU run at a lower speed, when you are underload or loading a program up, your CPU will jump back at max clock speed.

Nothing to worry about here.
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post #3 of 6
thats normal ots called speedstep i think it lowers multi when there is little load on cpu and raises it back up when there is load.you can go in bios and disable to keep multi at 8 if you want
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post #4 of 6
Speedstep. Its normal, disable it in BIOS. then it will be at 2.13 24/7

and btw if you disabled it on your 'crappy' SG-95 it would work too...800FSB is > 2.13GHz just FYI

C1E
Speedstep
ANY SETTING describing lowering clock or voltage or power consumption when idle...
    
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post #5 of 6
Thread Starter 
Thanks guys, I was quite confused there for a bit.

Sreenath - The main reason I called the SG-95 crappy was because it died after 3 months with no OC...

As for 800 FSB being greater than 2.13 Ghz, as far as I understood it:

800 Rated FSB / 4 = 200 FSB clock x8 (multi) = 1.6 Ghz

Again, correct me if I've missed something This is my first build.

-dissy
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post #6 of 6
People ask this every few days =\\
Akiyama Mio
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Akiyama Mio
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WD 250GB, 320GB SATA/3, 16MB Cache, Seagate 1TB LG GSA-H62N 18x SATA Ubuntu 9.10 x86 & Win7 x86 Asus VW222U 
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