IBM R50e Laptop: 2700 Memory running at 2100 Speeds

[UNhooked]

I recently bought a laptop from lenovo, for mild business work.
I just ran CPuz and noticed that altho the memory installed is PC2700 it is running at PC2100 speeds.
Is there anyway to make it run at PC2700 speeds?

 

[UNhooked]

up

 

[WackyDan]

Nope.... Not on an r50e..... R50e while being the same chassis and design generation of the current R52, is actually three models back in history (soon to be four), so hence it was design with slower memory speed to begin with.... They probably dropped 2700 in there as it makes economical sense. They still sell the R50e as a low cost notebook.... They's do the same with some of the R series once the new chassis comes out.

R52 does run 2700.

 

[UNhooked]

dammit so if i put in PC3200 ram..it won't run at that speed?
also do u know what chipset the laptop uses?
i was planning on buying a Dothan from the forum and installing it in there....preferably the 533Bus one

 

[wseyller]

no it won't run faster. memory speed will be determined by the fsb speed of the cpu.

 

[WackyDan]

Originally posted by: UNhooked
dammit so if i put in PC3200 ram..it won't run at that speed?
also do u know what chipset the laptop uses?
i was planning on buying a Dothan from the forum and installing it in there....preferably the 533Bus one

Can't drop a 533 cpu in it.

As far as the memory speed limitations... You find the same thing on desktops. I can't drop 3200 in my desktop - well... I could but it would only run at 2700. It's a limitation of the motherboard design.

 

[UNhooked]

but i thought 400FSB and 533FSB Cpus use the same socket except for the chipset

bt i thought this laptop uses the 855 chipset that supports PC3200 ram

 

[WackyDan]

 

[wseyller]

found some specs on a ThinkPad R50 1830. If that is the same thing then.

Max FSB: 400 - the 855PM chipset doesn't support more than that.

Max memory speed: DDR2700 333mhz

So you should be able to run DDR2700.

 

[fbrdphreak]

Let me clarify a few things here.

*You shoulda posted this in the Notebooks forum
*R50e's use the Intel 855GM chipset, which only supports DDR266 (PC2100). A 400MHz FSB does not mean the chipset supports DDR400.
*The entire 855 platform only supports 400MHz FSB chips. If you put a 533MHz FSB chip, it will only run on a 400MHz FSB and the CPU clock will be reduced. Example: 1.6GHz 533MHz (133MHz actual) FSB chip has a 12x multiplier. The FSB changes but the multi stays the same. New clock is 100MHz (400MHz effective) * 12 = 1200MHz. Don't waste your money on a 533MHz FSB Dothan, obviously.

 

[UNhooked]

ahh thanx that makes more sense...
still bummed abt the PC2100 ram tho...bt o well I still like the laptop..its enuff for my needs...for a $599 notebook the build quality is excellent