ocing newbie

[tstrike]

i heard the samsung pc2700 is a very good ocerclocking memory
and can reach 217fsb??
i'm new at this ocing

planning to buy
a p4 2.66 whihc has 20X multi?
133X20= 2.66ghz
and if the samsung pc2700 can reach 217
so does that mean
187X20 = i can reach 3.74ghz with the 2.66 if i go max?

sorry if this doesnt' make sense
trying to learn how to OC a p4

 

[ChampionAtTufshop]

samsung pc2700 is technically rated to 166mhz, anything after that is luck (CTL chips overclocked farther than DTL chips)

if you can get the samsung to 185mhz, and the cpu as well to 185mhz you get
185 *20=3700
that is theoretical overclock provided EVERYTHING (cpu/ram) can take the high bus

a more reasonable option imo would be 166*20=3320mhz
if you can push higher, by all means go ahead, nothing is stopping you
other than voltage, dont go above 1.7v actual if you want that cpu to last more than a few months or so (sometimes you get lucky, but i wouldnt try my luck with an expensive cpu such as this)

also you have to keep an eye on the temperatures

for your future reference
pc2100=133mhz
pc3000=185
pc3200=200

 

[tstrike]

what is this ration thing i keep hearing about
the 1:1 ratio and 3:4 ratio on the motherboard?
how do i know if the mobo has what ratio?
which ration is better?

 

[ChampionAtTufshop]

Originally posted by: tstrike
what is this ration thing i keep hearing about
the 1:1 ratio and 3:4 ratio on the motherboard?
how do i know if the mobo has what ratio?
which ration is better?

ratio
1:1 ratio means cpu frequency and ram frequency equal each other (cpu:ram=1:1)
3:4 ratio means cpu frequency and ram frequency run asynchronously (if cpu=100:ram=133)

in a 3:4 ratio, its cpu x 4 /3
there are also some boards wtih 4:5 ratios where if cpu was 133 ram would be 166
cpu x 5 /4

the only surefire way to check is to download the motherboard manual and see
or test out the motherboard if possible (look in the bios)

the ratio depends on what you are trying to acheive
higher cpu speed= 1:1 ratio is usually better, but sometimes it isnt, you need to experment
higher ram speed= any other ratio is better

 

[Budman]

4:5 = +25%
3:4 = +33%
4:6 = +50%
3:5 = +66%
3:6 = +100%


DDR chart. . . . 100fsb . . . 133fsb . . . 150fsb . . . 166fsb
4:5 = +25% . . . 250ddr . . . 333ddr . . . 375ddr . . . 415ddr
3:4 = +33% . . . 266ddr . . . 354ddr . . . 399ddr . . . 442ddr
4:6 = +50% . . . 300ddr . . . 399ddr . . . 450ddr
3:5 = +66% . . . 332ddr . . . 442ddr
3:6 = +100%. . . 400ddr