Will DDR2 800Mhz slow a cpu w/ 1333FSB

[jktrader]

I getting a new pc for trading but will pc-6400 slow down a cpu with 1333fsb? Isn't it true to have Ram and cpu runing at the same frequency?? 1066Mhz vs. 1066FSB?? what am i missing. I'm such a new newbie....

 

[jdkick]

FSB @ 1333/4=333MHz
DDR2 @ 800/2=400MHz

Running the FSB/memory frequencies at 1:1 would put your DDR2-800 at DDR2-667 speeds, so you're fine. The DDR2-800 just gives a little headroom, unless you really want to OC then you'd need something proven to work >400MHz.

 

[MarcVenice]

Like jdkick more or less said, the FSB speed is qaudpumped, and ddr2 speed is doublepumped. Makes it all very confusing, but in the end ddr2 800mhz is more then fast enough to keep up with the CPU, and it won't bottleneck the CPU.

 

[jdkick]

DDR2-800 is also at good price point right now and there are almost always some crazy rebates in effect.

 

[postmortemIA]

DDR2-800 will also run at lower latency at 667 speeds, if mobo is smart enough.

 

[imported_wired247]

Even better, overclock FSB to 400MHz *4 = 1600MHz

 

[ForumMaster]

DDR = Double Data Rate. it runs at double the date rate of the system bus.

the FSB (front side bus) on intel systems, is quad pumped. so you take the FSB, divide it by 2 and you get the minimum required memory speed. Having a higher memory speed is good cause it allows headroom for overclocking.