run ram at cpu bus better? how?

[jonn]

i run a AMD 1800 polo. non OC
its 266 bus
mem is 2700 - 333

programs, games, benchmarks, everything runs faster at 333 than at 266.

AM i missing something?

 

[Cerb]

What mobo?

1) SiS boards do well async
2) Some things will be slower...just not by enough to notice.
3) Due to the above and prices, no point in not getting PC2700, even for 133MHz CPUs.

 

[Viper96720]

It's for the 333mhz version it runs better 1:1. Rather than running the cpu at 333Mhz(166 ddr) while the memory is faster using dividers to run async.

 

[jonn]

motherboard is a Asus A7V8X accepts ddr400 too. viakt400

you say: no point in not getting PC2700, even for 133MHz CPUs
meaning 2700 over slower mem or over faster mem?

price isnt a big concern, asking all this because i am going to buy a new stick of 512, just cant yet decide on 512 of what
and later i want to change out to a 333 cpu, tbred B hopefully
..............................................................................................................................................................................................
and i dont understand this reply either:

It's for the 333mhz version it runs better 1:1. Rather than running the cpu at 333Mhz(166 ddr) while the memory is faster using dividers to run async.

 

[Cerb]

Originally posted by: jonn
motherboard is a Asus A7V8X accepts ddr400 too. viakt400

you say: no point in not getting PC2700, even for 133MHz CPUs
meaning 2700 over slower mem or over faster mem?

PC2100 = 133MHz, 266MHz DDR
PC2700 = 166MHz, 333MHz DDR

PC 2700 isn't much more $ than PC2100, in some cases less, and looks like it will remain useful until the end of the year for upgrading.

price isnt a big concern, asking all this because i am going to buy a new stick of 512, just cant yet decide on 512 of what
and later i want to change out to a 333 cpu, tbred B hopefully

You can run faster memory at slower speeds. So get the 166MHz stuff and run it at 133 (or 166 if you want).

..............................................................................................................................................................................................
and i dont understand this reply either:

It's for the 333mhz version it runs better 1:1. Rather than running the cpu at 333Mhz(166 ddr) while the memory is faster using dividers to run async.

There are three curren front-side bus speeds for Athlons:
1500+ to 2600+: 133MHz
2500+: 166MHz
2600+ can be gotten as 166MHz or 133MHz.
2700+ to 3000+: 166MHz
3200+: 200MHz

So running the memory at 1:1 with the FSB for your processor runs it at 133MHz. For 166MHz, you're running it at 4:5 (33 1/3 * 4 = 133 1/3, 33 1/3 * 5 = 166 2/3).
So, for the 166MHz FSB CPUs, running at 1:1 and their proper speeds runs the memory at 166MHz.
Running at 1:1, the CPU's FSB runs at the same speed as the memory, so neither has to wait. At 4:5, the memory has run 5 cycles for each of the CPU FSB's 4 cycles, so they are each off a step from each other.

Most SiS chipset mobos run async (133/166) better than others and better than in sync, and certain VIA mobos do as well.

Hope that helps. Lastly, if price isn't a big concern, get Corsair XMS or Kingston HyperX.