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Does the FSB speed even matter?

post #1 of 13
Thread Starter 
I noticed with my overclock I was roughly around 750mhz for a fsb instead of the 1000mhz it can do.

So I played around with my overclock to try to get the highest OC and now the highest FSB speed as well.

To go from a 750mhz FSB to a 1000mhz FSB I had to loose about 50mhz on my processor OC and about 5mhz from the RAM overclock.

I'm finding the benchmarks to be basically the SAME and even in some cases the slower fsb speed with slightly faster CPU and RAM clocks is faster then faster fsb speeds with slightly lower CPU and ram overclocks.

Don't Intel guys break out the checkbook to go from a 800mhz fsb to a 1066mhz fsb on their setups?
post #2 of 13
Quote:
Originally Posted by internal
I noticed with my overclock I was roughly around 750mhz for a fsb instead of the 1000mhz it can do.

So I played around with my overclock to try to get the highest OC and now the highest FSB speed as well.

To go from a 750mhz FSB to a 1000mhz FSB I had to loose about 50mhz on my processor OC and about 5mhz from the RAM overclock.

I'm finding the benchmarks to be basically the SAME and even in some cases the slower fsb speed with slightly faster CPU and RAM clocks is faster then faster fsb speeds with slightly lower CPU and ram overclocks.

Don't Intel guys break out the checkbook to go from a 800mhz fsb to a 1066mhz fsb on their setups?
Are you getting Hyper Transport Bus speed mixed up with frontside bus? If that's what you're referring to when you talk about your setup, it will make no difference at all. Go with the cpu and ram oc and disregard the HTT speed.
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post #3 of 13
Yeah I think he is I would set it to 4x that should put you near 1000 which is nice but I wouldn't suggest you let it climb over 1050 it might cause stability issues/
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post #4 of 13
Thread Starter 
So Im I reading that wrong then?

Why does Sandra call it FSB then?

THX for helping me with this fellows.
post #5 of 13
Quote:
Originally Posted by internal
So Im I reading that wrong then?

Why does Sandra call it FSB then?

THX for helping me with this fellows.
Well, without getting into a deeper discussion, AMD doesn't have a traditional frontside bus. The memory controller isn't located on the northbridge chipset, it's located on the processor itself. What you're thinking of as your front side bus is actually just the Hyper Transport Bus and the bandwidth it is capable of is beyond what's actually needed. Go back to your cpu and ram overclock and don't pay attention to the overal Hyper Transport speed as long as it's above 700 or so. You won't see any difference at all. That's more than enough bandwidth for your system, but raise it as high as you can with your settings just for the heck of it. Just make sure to keep it under 1k or you'll probably become unstable. I run mine at 858 and have no desire to raise it.
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post #6 of 13
Thread Starter 
THX for the help.
post #7 of 13
Quote:
Originally Posted by sccr64472
Are you getting Hyper Transport Bus speed mixed up with frontside bus? If that's what you're referring to when you talk about your setup, it will make no difference at all. Go with the cpu and ram oc and disregard the HTT speed.
But clock for clock aren't socket 939 cpu's supposed to have a 5% performance increase over socket 754 cpu's?
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post #8 of 13
Quote:
Originally Posted by erauman
But clock for clock aren't socket 939 cpu's supposed to have a 5% performance increase over socket 754 cpu's?
Thats an AMD generalization with regards to default speed settings.
Ocing, well it depends on the system, the OCer and the core quiality.
    
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post #9 of 13
Quote:
Originally Posted by erauman
But clock for clock aren't socket 939 cpu's supposed to have a 5% performance increase over socket 754 cpu's?
According to AMD's rating system a 939 2.2 Ghz CPU is 9% faster than a 754 of the same speed.
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post #10 of 13
your "FSB" or HTT speed is of no importance....it just needs to be set in a range to allow the computer to be stable.....
Use whatever setting gets the highest CPU clocks/memory clocks....dont worry about the HTT speed..
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