RAM help

[bladestorm]

Does anyone know why my 512mb PC133 stick would run at 100mhz and not 133mhz?

[mrtristan]

Are you using more than one stick at a time? If you're running PC100 and PC133 together, the PC133 will usually clock down to 100Mhz, if they manage to coexist.

It's could also be a jumper or BIOS setting.

[mujahid7ia]

wats the fsb of that t-bird

[bladestorm]

CPU-Z says this-

Core Speed- 997.2 MHz
FSB- 99.6MHz
Bus Speed- 199.3MHz

Thats under the CPU tab, under the Memory tab,

Frequency- 99.6MHz
FSBRAM- 1:1


I know my FSB is supposed to be 200MHz, so FSB should read that, and the Frequency 133MHz since the RAM is PC133 but it doesent?

If you dont know what CPU-Z is go here- http://www.cpuid.com/

[mujahid7ia]

If it says your FSB is ~100 MHZ, then the RAM will be limited to that speed. If it's supposed to be FSB 200mhz, something's underclocked...

Try WCPUID ... what does it say?
http://hp.vector.co.jp/authors/VA002374/src/download.html

[bladestorm]

After some searching I found out my FSB is supposed to be 100MHz. I thought for sure it was supposed 200MHz but I guess not. As for the RAM running at 100Mhz that makes since now. If in the BIOS I change it to
Host+33 will it then be 133MHz?

[bladestorm]

I was looking even more and every site I went to does say 200MHz FSB for my CPU? Could it be that they rate that as the bus speed of the CPU is 100 and the speed of the RAM is 100 so that equals 200MHz or 233Mhz if your using PC133 RAM?

[RabidDog]

fill in you FULL computer details and someone will be able to tell you exactly what your problem is

[Piccoro]

The 200 may come from a the sample rate.
Todays P4 800fsb boards are actually 200 mhz that sample 4 times per clock. 200x4=800
AthlonXP fsb of 133/166/200 is multiplyed by 2 (2x133=266).
Durons I believe are 100mhz so 2x100=200.
Yours could also have a 2x multiplyer.
You memory will run at 100mhz and I would leave it at that. You want 1:1 ratio. Memory and FSB to be in sync (100:100).

[bladestorm]

With a little searching and all your help I figured this all out. Thanks.