Strange memory readings

[CaBoOse999]

I'm running my HTT at 289 with a 9 multiplier and my memory divider is at 5:6. My memory should be running around 240 but according to cpuz and everest its running at 236.5. In bios and itn memtest it reports it running at 240 like ity should be. I don't know whats going on here.

http://img128.exs.cx/img128/4620/screen123in.jpg

 

[mwmorph]

rounding. is your fsb at exactly 289 in cpu-z. cause at stock, my fsb is usually 200.9 or something, just a fraction off. if it's a fraction off, your memory speed wont be exactly 240 as you had it therotically. cpu-z is showing the true score. the other apps are rounding.
for ex, my cpuz reading give a 2411mhz reading while my windows system panel/window says 2400mhz.

 

[yliu]

Here is how divider really works.

When your CPU is running at 289x9=2601, and your memory is set to 5:6, the memory speed is calculated in the following way:

9*6/5=10.8; the CPU rounds this number to 11, so your memory is at
2601/11 which is about 236. It is NOT 289*5/6=240, but some programs and/or BIOS will report this number.

Here is a list of dividers used for a combination of CPU multiplier and memory divider setting, it's in the form of 183 - x8->x9, which means when you set your memory to 183Mhz in the bios and the CPU multi is 8, the memory is running at 1/9 of CPU speed.

mem divider:
200 - x8->x8, x8.5->x9, x9->x9, x9.5->x10, x10->x10, x10.5->x11, x11->x11
183 - x8->x9, x8.5->x10, x9->x10, x9.5->x11, x10->x11, x10.5->x12, x11->x12
166 - x8->x10, x8.5->x11, x9->x11, x9.5->x12, x10->x12, x10.5->x13, x11->x14
150 - x8->x11, x8.5->x12, x9->x12, x9.5->x13, x10->x14, x10.5->x14, x11->x15
143 - x8->x12, x8.5->12, x9->x13, x9.5->x14, x10->x14, x10.5->x15, x11->x16
133 - x8->x12, x8.5->x13, x9->x14, x9.5->x15, x10->x15, x10.5->x16, x11->x17
125 - x8->x13, x8.5->x14, x9->x15, x9.5->x16, x10->x16, x10.5->x17, x11->x18
100 - x8->x16, x8.5->x17, x9->x18, x9.5->x19, x10->x20, x10.5->x21, x11->x22

 

[CaBoOse999]

ok thanks that makes alot more sense now