FSB vs. DDR Speeds

B

Bronson7

New Member
Gang, someone educate me here. The motherboard accepts an FSB of 400/333. The CPU I'm using has a FSP of 333. So I'm guessing I'm fine with that. The DDR standard for the board is 400 (3200). Should I use DDR 333 instead, to match the CPU. I don't understand the correlation between these two speeds, if any correlation at all. What do you say? Thanks.
Bronson7
 
The speed on RAM is how fast it works.
It doesn't really matter what your processors FSB is. (The motherboard will slow the RAM down if its to fast for the motherboard).. So, the motherboard is the only thing you have to worry about slowing down your RAM..
 
That's not how it works. If the RAM is DDR-333, then the FSB for it will be 166mhz. If the CPU's FSB is 333, then it would be best if the RAM speed ran at 333mhz also to have a 1-1 ratio. DDR-400 would not be too fast for a CPU that has a FSB of 333 because DDR-400's speed is 200mhz. The RAM would actually be slower than the FSB of the CPU.

Someone correct me if I'm wrong.
 
You were going good until
The RAM would actually be slower than the FSB of the CPU.
Click to expand...
The CPU is an AMD chip I believe (even if it's not it doesn't matter, it's the same principle) and they use a DDR FSB on the older models. So DDR333 and 333 "FSB" are the same thing.

Also, we can enter the magical world of not 1:1 RAM Ratios where you can run DDR400 on a FSB that is not 200 (or 100QDR(old intel) for that matter).
The speed on RAM is how fast it works.
It doesn't really matter what your processors FSB is. (The motherboard will slow the RAM down if its to fast for the motherboard).. So, the motherboard is the only thing you have to worry about slowing down your RAM
Click to expand...
This isn't a wrong statement but it isn't necessarily right in this case.
 
You must log in or register to reply here.
Back
Top