[SUXBlade]

Do I get a performance boost by having my RAM running faster than the FSB??

The RAM cant get information faster than the FSB is feeding... So, when I run the RAM faster than the FSB, then the FSB is only bottlenecking the RAM...
Am I right about that? Or.....how does it work?

Whats the good thing about having the RAM faster than the FSB?

Btw:
I got 2GB of Corsair TWIN2X 6400C4 memory (2x1GB)
Stock: 400MHz @ 4-4-4-12 @ 1.8v
My setup: 365MHz @ 4-4-4-8 @ 2.0v (1:1)

 

[kidwolf909]

Quote:

Originally Posted by SUXBlade Do I get a performance boost by having my RAM running faster than the FSB?? The RAM cant get information faster than the FSB is feeding... So, when I run the RAM faster than the FSB, then the FSB is only bottlenecking the RAM... Am I right about that? Or.....how does it work? Whats the good thing about having the RAM faster than the FSB? Btw: I got 2GB of Corsair TWIN2X 6400C4 memory (2x1GB) Stock: 400MHz @ 4-4-4-12 @ 1.8v My setup: 365MHz @ 4-4-4-8 @ 2.0v (1:1)

You are correct, running the RAM faster than the FSB yields no performance gain. The RAM is limited by the speed of the FSB, so a 1:1 ratio is the best you can have.

 

[SUXBlade]

Thanks!!

I see many ppl here run dividers that let the RAM run faster than the FSB, so I was curious...

But now I know!
Thanks again!

 

[ckp64]

Actually, running RAM faster than the FSB does help in synthetic benchmarks. For example when I'm running 400FSB with RAM speed 400mhz (4-4-4-8) I get ~20.8s SuperPi1M, but when I'm running 400FSB with RAM speed 500mhz (4-4-4-8) I get ~19.6s SuperPi1M, about a 1s difference.

 

[Nasgul]

You won't see a major difference but I never use a 1:1, only 4:5 and now 2:3 which bring my RAM to CPU to 265:442mhz for RAM and CPU to 333:500mhz for RAM.

While I don't see a night and day difference, I see enough for me to run a higher RAM frequency than CPU's FSB.

 

[rabidgnome229]

It gives a bit of a boost - but nothing remotely useful

 

[rx7speed]

Quote:

Originally Posted by kidwolf909 You are correct, running the RAM faster than the FSB yields no performance gain. The RAM is limited by the speed of the FSB, so a 1:1 ratio is the best you can have.

can you explain that to me a little better.

right now I have my ram on a 1:1 ratio as I am limited by my ram right now but my front side bus is rated at 1420Mhz while my ram is rated at 710Mhz. this is with a true FSB of 355Mhz

so if I want my ram to run the same speed as the FSB shouldn't I run my ram at a 2:1 ratio then? well that is if my ram could support that speed