KT133/133a chipset owners please

[LaRnZ1]

hey guys ive got a abit kt7a which has the kt133a chipset so far i like it its a good board .. but i digress

umm my question is i have a t-bird 900 i can run it at 10x 100(200fsb) to be nice and stable on a gig or i can run it @ 7.5 x 133(266fsb) @ 1 gig nice and stable now is the latar really any better? in sandra the diff on the cpu test seems to be about 10-20 points but the temp diff is about 5 C from about 40 - 45C.

what you guys reckon i should stay at i know sandra is kinda crappy and dosent mean much.

ao what ya's reckon?

Cheers LaRnZ

 

[John]

The 133FSB will improve your memory bandwidth, therefore it is a step in the right direction.

 

[neuralfx]

http://www.athlonoc.com/tweakvia1.htm try this site, dont know if your familiar with WCPUID and all those programs or not but nevertheless this is a nice simple guide to tweakin your chipset and maybe even droppin the temp a lil..
-neural

 

[LaRnZ1]

thx neuralfx il look into thse

 

[ElFenix]

133FSB doesn't really improve your mem bandwidth, thats already fixed by the 133MHz mem bus. it will improve your memory latency, since the fsb and mem bus run at the same Hz. thats where the performance improvement of the kt133a really comes from.

 

[IaPuP]

ElFenix... that's not true... how do you figure that??

Due to the nature of the memory controller, the FSB can actually help increase the bandwidth BECAUSE of the "load slots" that hide under the access latency. *thinking* Loading cache lines causes little bursts that might also benefit from the full bandwidth...

=-)

Eric

 

[ElFenix]

doesn't that have to do with running sync'd vs running async?

 

[kmmatney]

The question was whether it is better to run at 10 X 100 MHz, or 7.5 x 133 Mhz. The latter setting will provide more memory bandwidth (266 EV6 bus). Therefore the 133 MHz setting will be better. This has already been proven in many benchmarks, where the 133A chipset outscores the old KT133 shipset, due to the extra memory bus.

 

[limsandy]

I think what ElFenix is saying is that you can run your CPU FSB at 100 Mhz but run your memory at 133 Mhz, and this is possible. It also provides wider memory bandwidth.

 

[IaPuP]

ELFenix, The KT133a is an pseudo-async chipset and can't change modes to sync, even when you set it to 133/133 or 100/100.

That's all a design 'feature' and likely a product of having to talk to a DDR FSB. =-)

Eric