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quick question

post #1 of 8
Thread Starter 
my bios alows me to limit my ram speed aswell as change it is it possible to limit it to 1.3GHZ and still oc my cpu 2 3.6GHZ

that way i can keep ram at stock speed
with the cpu overclocked
instead of it setting ram @ 800MHZ

has that been done before or dose the limit speed option not work like that

reason i asked is i remember seeing that option last time i overclocked this system on this board

if it hasnot been done before i will try and post back

also im looking for a cheap dual core GPU my HD3870x2 is dead what dual core ATI cards are there to chose from i would even trade this 4850 for a 3850x2
Edited by craigs911 - 6/15/11 at 9:48am
post #2 of 8
Why go backwards for a dual gpu card when you could get a cheaper single gpu card 6xxx serries that will give you dx11, outperform the other card, and use less power?

As for your Ram, I think you are referring to the Ram speed Ratio, something like 1:4, 1:3.33, 1:2.66 Etc. I would leave the Ram as close to stock(what the ram is rated at) as you can while you atempt to OC the processor, then Play with the ram speeds later on. Directly, you will have to change the Ram Ratio when raising the Reference clock of the CPU to keep the Ram speeds at or below stock.


Yes Changing the Ratio "limits" the speed the Ram can run at.I think it works out that the Ratio will equal stock speed every 40mhz overclocked on the Reference Clock, so if you go from Reference Clock, 200 and the Ratio is 1:4 your memory speed would be 800(DDR2 and 3 are Double Data Rate, so that would be 1600Mhz Ram) at 240 RC the ratio would be 1:3.33 to get 800Mhz.

If you are running Generic 1333mhz Ram you will want to keep at or below 666mhz in the bios.

Clear Like Mud?
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post #3 of 8
I would guess your RAM is running at 1600Mhz when you overclock your CPU to 3.6Ghz, which shows up as 800Mhz in a lot of software. But yes, you should be able to limit it to ~1333Mhz if it's unstable at higher clock speeds.

Also, why do you want a dual-chip video card? I would say just get a 6950 or something like that.
post #4 of 8
Thread Starter 
Quote:
Originally Posted by t-ramp View Post
I would guess your RAM is running at 1600Mhz when you overclock your CPU to 3.6Ghz, which shows up as 800Mhz in a lot of software. But yes, you should be able to limit it to ~1333Mhz if it's unstable at higher clock speeds.

Also, why do you want a dual-chip video card? I would say just get a 6950 or something like that.
ok thanks

not sure why i guess fell in love with the 3870x2 it was £70 and offers a hell of a lot of performance for its price i dont and never will use DX11 for the forceable future

i just like the performance these dual GPU cards can offer if i could i would get a 48702/4850x2 tomorrow i like the fact that not that many people really uses them my 3870x2 was a cheap little power house for what it was


back to CPU the limit speed thing did not work kinda hoped it would ah well just settled for 3.6 with the ram at 960MHZ-480/480
post #5 of 8
Quote:
Originally Posted by craigs911 View Post

back to CPU the limit speed thing did not work kinda hoped it would ah well just settled for 3.6 with the ram at 960MHZ-480/480
Your Ram is limited, severely. it should be 666/666. is 480 the closest you can get? What Ratio's are available?
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post #6 of 8
Thread Starter 
Quote:
Originally Posted by cook View Post
Your Ram is limited, severely. it should be 666/666. is 480 the closest you can get? What Ratio's are available?
well i set the ram manualy to 800MHZ-400/400

then adjusted the FSB to 240x15 for a OC of 3.6 i can go to 3.8 but rewires to much voltage im ok with ram under stock speeds seems to make no difference in my games just wondered by limiting it to stock speed would mean i could overclock my CPU without changing ram to a lower speed

with my 240x15 oc i get ram speeds of 960 so 480/480 idid try the next one up from 800 but it wouldn't post
post #7 of 8
For the price of a 4850X2 you could just get a 6870 which would be better than it, and use less electricity etc.
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post #8 of 8
Thread Starter 
Quote:
Originally Posted by Devilmaypoop View Post
For the price of a 4850X2 you could just get a 6870 which would be better than it, and use less electricity etc.
how much is a 6870
i can get a 4850x2 for £130
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