Higher HTT=better performance?

[DrZDO]

It occured to me that I don't know if a higher HTT speed with an A64 gives a performance boost by itself, if, say the cpu speed and memory speed are the same in either case. It won't affect my actions in the near future, but one can always have more knowledge. Thx.

 

[BlueWeasel]

The performance gain is minimal for the actual HTT of 800-1000Mhz (800 HTT for NF3, 1000 HTT for NF4). Generally, when overclocking, it's better to keep it 1000Mhz HTT or lower for stability.

If by HTT, you mean the base frequency (ie, FSB), then yes, increasing it will help perfomance if the clock speed and memory speed stay the same.

 

[TheRyuu]

If you mean somthing like this:
200x11=2200
vs.
220x10=2200

Then the latter is better. A higher FSB/HTT plus a lower multiplyer is always better than a higher multiplyer and a lower FSB/HTT.

Now if you mean the Hypertransport speed (speed between K8 and NB) then it really doesn't matter much. You could go as low as 600mhz and it wouldn't make a performance difference. Shows how good the Hypertransport communication system really is .

 

[roffle mayo]

I've gone as low as 1x HTT and not noticed any difference in performance.

 

[gobucks]

I've used several socket 939 motherboards and haven't had any trouble running stably up to 1200MHz HTT. Right now mine is at 1125MHz or so. That being said, I haven't really been able quantify any difference between running at a 4x or 3x multi. I do remember though that when the nforce3 250 came out, they had benchmarks showing decent gains over the older, 600MHz HTT nforce3 150. Whether it was just a better chipset or whether it was due to the HTT speed was not really clear.

 

[DrZDO]

Yeah, I meant the AMD equivalent of FSB, actually.

 

[Fox5]

Originally posted by: roffle mayo
I've gone as low as 1x HTT and not noticed any difference in performance.

Back when the initial nforce3 150 boards came out, they were shown to perform around 3%-5% worse due to only have a 600mhz HTT bus.

 

[zephyrprime]

Originally posted by: wizboy11Shows how good the Hypertransport communication system really is .

It really just shows how relatively low bandwidth IO & video card traffic generates in PCs. In a multiprocessor system, HT is more important because of the inter-processor communications.