Wrong clock speed reported?

J

jordo2k1

n00b
Joined
Feb 23, 2015
Messages
3
Hi all!
just decided to build a new system upgrade my old i5 2500k system and im having a little problem (may not even be a problem) which i never noticed on my last system or systems before.
heres my new system specs for anyone whos intrested on giving any tips with setups or bios etc ;)

aerocool gts full tower
intel i7 4790k (with stock cooler)
asus maximus 7 hero mobo with bios version 2304
8gb gskill ripsaw ddr3 1333
msi gtx 970 4g gaming edition
silverstone Strider Plus 1000W psu
(using onboard sound as sound blaster card was faulty and had to be rma'd)

firstly im used to having a custom water cooler setup but as i have a new mobo my old xpcs cpu block will not touch the cpu due to surrounding mobo heatsinks so ive had to set at stock speeds for a few days as my cpu block is on order.

my issue is this:
when the clock is set at 100 base clock (bsclk) and the default x40 multiplyer used i get a speed report in cputemp and cpuid of 3.999 ghz and the bsclk is reported to be 99.99 instead of 100.

i have tryed a few overclock etc and even let turbo boost kick in but even they show wrong base clock of 99.99 even after i have manually set it in bios as 100.

any ideas guys? also for anyone with any tips on optimizing this board or setup im always grateful and take any help on board.

cheers!
 
Doesnt matter.
The readings arent always correct and the speed crystal will have a slight variance too, small changes will produce non integer values.
Mine does similar.

You arent going to see a performance difference even if it is slower.
The variance is .01% or less.
 
Yea cheers pal I didn't expect it to be a big problem it was just something new I noticed and wanted to grow my knowledge:)
 
BCLK variances of up to .1 mhz are normal. You have a variance of .01.
 
Give RealTemp a try. It might get you a little closer to the perfect 100.00 MHz that your OCD self is seeking. :)

You can download version 3.70 from TechPowerUp or the newer T|I version.

RealTemp T|I Edition
https://www.sendspace.com/file/55yvry

The true BCLK is usually very steady but it is difficult for monitoring software to report an accurate and steady BCLK due to Windows issues with accurate time measurement.
 
melk said:
You can also turn off Spread Spectrum in bios
Click to expand...

DO NOT WORRY IF TOOLS ARE REPORTING 3.99999 GHz. There's always some variance with (1) the clock generator on your motherboard and (2) the method the software uses to track how fast your core is.

In the world of Engineering, that's close enough to 4.0 GHz :D

You only need to worry about disabling Spread Spectrum if you are overclocking.
 
Last edited:
In the world of engineering, +/- 5% is good enough ;)

Most of the time.
 
You must log in or register to reply here.
Back
Top