higher speed ram better for OC

[nepluto]

ok its pretty much known that the higher speed your ram is the better you can OC. my question is. i get ram instability when OCing my a64 3700+ and i have OCZ DDR 3200 ram at 400mhz. i can OC my CPU over about 200mhz (217*12) my multiplier is locked so i cant adjust that. but what i was wondering is if i could get ram like DDR533 or something and it would still work in my board since it is rated for DDR400. any help would be appreciated.

 

[AMDZen]

Whats your motherboard?

 

[Cobalt]

Run a divider.

 

[NINaudio]

Have you lowered your ldt multiplier? Increased ram voltage? Which ocz ram do you have? We need more info!

 

[spiritwalker2223]

Run a divider on your ram, it might be benificial to lower your cpu multiplier to. i.e. set your fsb to 240, ram divider at 166 (or 5/6) and you get your ram back to stock speeds. then you can mess with your cpu multiplier.

NINaudio, why do you have your ram at 2t?

 

[NINaudio]

I was able to get another 110mhz on my oc by switching to 2t.

 

[imported_goku]

Originally posted by: NINaudio
I was able to get another 110mhz on my oc by switching to 2t.

Yea I don't think thats a good idea, running at command rate T2 is very very bad, slows down the system significantly. It's like in the old days of the pentium, people with 166MHZ Pentiums would change the FSB from 66 to 60 and then increase the multiplier so that it would go to 180MHZ but didn't realize that actually slowed down the system more than the benefit of going a few more MHZ for the core.

 

[Soccerman06]

T2 only drops the overall speed of the machine by ~3%, not bad if you can get you memory over 600mhz

 

[NINaudio]

Originally posted by: goku

Yea I don't think thats a good idea, running at command rate T2 is very very bad, slows down the system significantly. It's like in the old days of the pentium, people with 166MHZ Pentiums would change the FSB from 66 to 60 and then increase the multiplier so that it would go to 180MHZ but didn't realize that actually slowed down the system more than the benefit of going a few more MHZ for the core.

2T has very little impact in real life, the largest impacts are all on theoretical benching. The small impact it has is more than made up for by the additional processor speed. There is a thread on it somewhere in these forums. I will find the link and edit it in.

EDIT: Here ya go

 

[Avalon]

Originally posted by: goku

Originally posted by: NINaudio
I was able to get another 110mhz on my oc by switching to 2t.

Yea I don't think thats a good idea, running at command rate T2 is very very bad, slows down the system significantly. It's like in the old days of the pentium, people with 166MHZ Pentiums would change the FSB from 66 to 60 and then increase the multiplier so that it would go to 180MHZ but didn't realize that actually slowed down the system more than the benefit of going a few more MHZ for the core.

Wrong. Running at 2T has practically no effect on your system. You'll see a 1-3% drop in bench numbers, if you're lucky.

ok its pretty much known that the higher speed your ram is the better you can OC

Wrong. You OC just as high with value ram as high speed or low latency ram. You're getting ram instability because it doesn't look like your PC3200 ram can overclock much further than it's rated speed. Use a divider.

 

[nepluto]

i have an MSI K8t Neo FSR mobo.. i can not lower the multiplier on the CPU and i can not set a divider. unless there is some way to enable it in my bios. but there is no option for it. and i dont know of a way to unlock the multiplier. i dont have the box as im at work right now but the latency on it is 2-2-2-5.. and i wasnt talking about value and highspeed .. im talking about DDR333 as opposed to DDR400.. thats why i was wondering if i put DDR533 in if it would still be compatible and since it would run at 400mhz at boot. Ocing my FSB 133 would put the ram at stock speeds and wouldnt have to worry about stability issues. as for my command rate i have tried it on 1T and 2T didnt notice a substantial difference but i seem to have more stability at 1T then 2T which i am confused about. but a bit more performance so i really dont care.. lol. but since i cant set a divider and i cant lower my multiplier then i was wondering if putting higher speed ram such as DDR533 instead of DDR400 would help with stability issues but then again thats only if my board would accept the ram...

 

[rickn]

Originally posted by: goku

Originally posted by: NINaudio
I was able to get another 110mhz on my oc by switching to 2t.

Yea I don't think thats a good idea, running at command rate T2 is very very bad, slows down the system significantly. It's like in the old days of the pentium, people with 166MHZ Pentiums would change the FSB from 66 to 60 and then increase the multiplier so that it would go to 180MHZ but didn't realize that actually slowed down the system more than the benefit of going a few more MHZ for the core.

2t slows cuts memory bandwidth, but if you're having overclock problems it will usually let you overclock more. 200mhz additional cpu mhz easily offsets any performance hit 2t might cause. try it and see for youself

 

[NINaudio]

Originally posted by: nepluto
i have an MSI K8t Neo FSR mobo.. i can not lower the multiplier on the CPU and i can not set a divider. unless there is some way to enable it in my bios. but there is no option for it. and i dont know of a way to unlock the multiplier. i dont have the box as im at work right now but the latency on it is 2-2-2-5.. and i wasnt talking about value and highspeed .. im talking about DDR333 as opposed to DDR400.. thats why i was wondering if i put DDR533 in if it would still be compatible and since it would run at 400mhz at boot. Ocing my FSB 133 would put the ram at stock speeds and wouldnt have to worry about stability issues. as for my command rate i have tried it on 1T and 2T didnt notice a substantial difference but i seem to have more stability at 1T then 2T which i am confused about. but a bit more performance so i really dont care.. lol. but since i cant set a divider and i cant lower my multiplier then i was wondering if putting higher speed ram such as DDR533 instead of DDR400 would help with stability issues but then again thats only if my board would accept the ram...

To bring this back on topic, yes you can use higher rated ram in your board without a problem, and it should let you OC higher.