Differences of HT 2.0 and HT 3.0

[netxzero64]

what is the difference between the two?

are there any real world performance increase from HT 2.0 to 3.0?

 

[Jtorrespr1]

http://en.wikipedia.org/wiki/HyperTransport

there is some information for you.

 

[Rifter]

read that link, 3 is twice as fast.

 

[netxzero64]

read that link, 3 is twice as fast.

Are the differences noticed in real world performance? the numbers can tell the difference but in terms of gaming/multitasking, are there noticeable changes?

 

[Rifter]

Yes overclocking the NB(HTT) in my experiance on a AMD setup usually yields very good increases in performance. If you are just increasing the multiplier on the CPU you are leaving performance on the table with a AMD system IMO.

 

[StrangerGuy]

It's like widening a four lane highway with just one car to eight lanes. Think about it, would it make the car go faster?

 

[nenforcer]

I think there are definite performance improvements for someone with a Phenom ][ X4 like you have but only if you are using multithreaded apps using multiple core, like StrangerGuy says.

If its just 2d business apps in Windows not so much difference.

 

[netxzero64]

Yes overclocking the NB(HTT) in my experiance on a AMD setup usually yields very good increases in performance. If you are just increasing the multiplier on the CPU you are leaving performance on the table with a AMD system IMO.

so it means there are lesser gains on overclocking using multiplier push? rather then FSB

 

[heyheybooboo]

so it means there are lesser gains on overclocking using multiplier push? rather then FSB

"Lesser gains' might be a little misleading.

'Increases bandwidth and reduces latency' might be a better way to put it. Whether the result is a performance gain is dependent upon the application(s).

As far as the HT my understanding is the 'rule of thumb' is your RAMs speed. As long as the HT frequency exceeds the overall clock speed of your memory you are good to go.

HT3=2.6GHz so DDR3 2600MHz would theoretically saturate the link.

The IMC/NB speed is a different matter. Generally speaking, for each 10 percent increase in the IMC/NB, memory bandwidth is increased 3-4 percent and latency is reduced 3-4 percent.




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[netxzero64]

"Lesser gains' might be a little misleading.

'Increases bandwidth and reduces latency' might be a better way to put it. Whether the result is a performance gain is dependent upon the application(s).

As far as the HT my understanding is the 'rule of thumb' is your RAMs speed. As long as the HT frequency exceeds the overall clock speed of your memory you are good to go.

HT3=2.6GHz so DDR3 2600MHz would theoretically saturate the link.

The IMC/NB speed is a different matter. Generally speaking, for each 10 percent increase in the IMC/NB, memory bandwidth is increased 3-4 percent and latency is reduced 3-4 percent.
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so if I have an HT speed of 2GHZ, the only way to saturate it is to have a memory speed equalling that? am I right?

 

[nenforcer]

Yeah you want the RAM speed faster than the HT speed or else the CPU is bottlenecked.

I think this is why AM2+ offered official support for DDR2 1066 memory speeds since it went to HT2 or HT3.

AM3 boards are the only ones to natively support DDR3, naturally.