Not showing CPU FSB speed

I have ASUS P5B-MX Motherboard, Intel 946GZ Chipset. Intel Core 2 Duo E7200, 1066 MHz FSB bus. DDR2 SD RAM compatible (2 Banks/slots).

Recently i changed my RAM from 1 GB DDR2 RAM to 2 GB DDR2 RAM in a single slot.
Previously in Windows 7 it used to show
Processor : Intel Core 2 Duo CPU E7200 @2.53 MHz 3.6 Mhz.
but now it is showing it as
Processor : Intel Core 2 Duo CPU E7200 @2.53 Mhz 2.53 Mhz.

I suppose it is not showing the additional FSB 1066 Mhz speed.

Please help!!!

Download CPU-Z and see what it tells you. When you launch it, click on "Clocks (Core #0)" to change which core it shows.

Thanks for your help. I will download it and check the exact specifications.

Meanwhile, i have also checked the settings in my BIOS. it shows same.
Intel Core 2 Duo E7200 2.53 Mhz 2.53 Mhz.

I think it should show 3.66 Mhz. So it is not only a Windows 7 problem.

What may be the issue?

Intel Core 2 Duo E7200
CPU Arch : 1 CPU - 2 Cores - 2 Threads
CPU PSN : Intel Core2 Duo CPU E7200 @ 2.53GHz
CPU EXT : MMX, SSE (1, 2, 3, 3S, 4.1), EM64T
CPUID : 6.7.6 / Extended : 6.17
CPU Cache : L1 : 2 x 32 / 2 x 32 KB - L2 : 3072 KB
Core : Wolfdale (45 nm) / Stepping : M0

Freq : 1600.1 MHz (266.68 * 6)


MB Brand : Asus
MB Model : P5N-MX
NB : NVIDIA GeForce 7050 rev A2
SB : NVIDIA nForce 610i rev A2

GPU Type : NVIDIA GeForce 7050 / NVIDIA nForce 610i (Microsoft Corporation - WDDM)
DirectX Version : 11.0


RAM : 2048 MB DDR2 Single Channel
RAM Speed : 400 MHz (2:3) @ 5-4-4-17
Slot 1 : 2048MB (6400)
Slot 1 Manufacturer : Noname

Where am i supposed to load the default settings? In the BIOS ?

or should i update using ASUS EZ Flash 2 software....will it work?

What should be the exact timing and voltage settings to run it at 1066 Mhz ?

One word, Speedstep,



SpeedStep - Wikipedia, the free encyclopedia

which is enabled by default in the bios on your motherboard according to the manual.

Providing your board says it can run your Ram at 1066 speeds.

It doesn't,

ASUSTeK Computer Inc. - Motherboards - ASUS P5N-MX

2 x DIMM, Max. 4 GB, DDR2 800/667/533 Non-ECC,Un-buffered Memory
*800 is overclocking speed

It only supports up to 667 MHz ram, and has to be "overclocked" to run at 800 MHz. If you don't have the manual download it from the Asus link above and go to page 2-21 and it explains the settings and what needs to be changes to get the ram to run at a higher frequency,