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 Post subject: Matching RAM and CPU FSB?
PostPosted: Sat May 24, 2008 10:51 pm 

Joined: Tue Feb 12, 2008 8:31 pm
Posts: 8
There are 2 computers with different configurations that i have been looking at and I was wondering which would be best for performance.This is for a laptop

Config 1
CPU = Core 2 Extreme x9000 (2.8ghz, 800mhz, 6mb L2)
Ram = 4096 MB DDR2 800mhz


Config 2
CPU = Core 2 Duo T9600 (2.8 ghz, 1066mhz, 6mb L2)
Ram = 2048 MB DDR3 1333mhz

I was wondering how important it was to match the CPU and RAM FSB and bandwith? Also, isn't there a maximum FSB determined by a motherboard, would the 2nd config be a waste?

I don't know a lot about computers and I am still learning. Any help would be greatly appreciated.

 Post subject:
PostPosted: Tue Jun 03, 2008 3:25 am 
Team Dino
Team Dino
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Joined: Mon Jun 28, 2004 6:29 am
Posts: 6125
Location: Huntsville, Alabama.
Depends on if it's running in dual channel or not.

Dual channel 800 MHz runs at 1600 MHz, which would only be needed for 1600 MHz FSB CPUs.

Dual channel 1333 runs at 2666 MHz, so that's still 1066 MHz faster than a 1600 FSB CPU.

Something tells me that second config is 667 MHz memory running as dual channel though. Laptop memory (SO-DIMMs) just recently reached 800 MHz.

It's better to have faster memory than your FSB at any rate. The reason? Faster memory has tighter timings at slower speeds.

In other words, if you run 800 MHz memory at 400 or 667 MHz speeds, it will respond quicker to fetches and the such.

You can also run faster memory at it's native speed and get some (most of the time slightly) performance benefits.

Looking at your two options, without looking at thermals, I'd go with the T9600 config.


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