3800 X2 question + help

[salami1212]

Whats better at overclocking. A toledo or manchester 3800 x2. I know that one has half the cache disabled. Im just wondering, is one of them better than the other?

Also, what is the difference between the HT in your bios. like 1x - 5x

 

[quadboi]

Ht, is like the multiplier which it will go e.g. On my 3000 venice its x9 by 200 HTT = 1.8ghz

 

[salami1212]

noo.. the ht.. ie 3x or 4x or 5x

 

[loltim]

Thats the CPU multiplier though? Its LDT multiplier x HTT. In my case 4 x 255 = 1020MHz

 

[Defcon5]

HT is the hypertransport bus, its how your cpu talks to the pci (and -e) buses and ram etc,
its calculated by your HTT freq (fsb) times the ht multi

It has a max of1000mhz, if your clocking you will need tio reduce it, you wont get any performance decrease as the bus is nowhere near saturated.

 

[loltim]

Where did this 1000 max business come from? Surely the higher the better.

 

[Defcon5]

no its like the pcie/agp bus freq, you get instability over a certain limit.

plus theres tons of spare bandwith so removing some of it wont make a difference

 

[PinkFloyd]

The New ATI 550 boards can suppport much faster hypertransport lanes according to early previews, although it doesn't make any difference....

Generally I would say Manchesters overclock better as they have less cache so don't get as hot, or atleast thats the theory.
The extra cache on the Toledo is generally regardd as about equal to another 200MHz on the core.

 

[loltim]

no its like the pcie/agp bus freq, you get instability over a certain limit.

plus theres tons of spare bandwith so removing some of it wont make a difference

Yeah so the higher the better provided its stable, the same with any overclock.

 

[Street]

Not really because all the components don't make use of all the available bandwidth currently anyway. You can knock it down to 3x or maybe even 2x 200 and have an HTT bus at 400/600MHz and not notice any slow down at all.