FSB Ram Ratio

K

Koreanzulu

Weaksauce
Joined
Jan 2, 2005
Messages
64
I've finally had some luck overclocking my e6400 on my biostar 965pt, I set the FSB to 325 and the ram to 'auto'. It is automatically giving me a 2:3 ratio. When i try to achieve a 1:1 by setting the ram to 667 and FSB to 333 it locks up during post and i have to reset cmos. Is there anyway i can manually set the ratio or get it to automatically set a 1:1 fsb:ram ratio. Because i see no point in having my ram speed 488 when my fsb is only at 325. Thanks =)
 
Having your ram faster then your fsb will give you more performance then a 1:1 ratio. I don't see why you would want to have slower ram.
 
Slowing down your RAM is only useful if you need to pump your FSB up.

For example, running your FSB at 400mhz, with the default RAM:FSB would have it up near 1200mhz... So reducing the ratio will get it back to it's native 800 (or at least, closer to it's native 800mhz).

There's no real benefit to having 1:1 ratio (except for the scenario I described above), so leave the RAM speed on auto, and crank up the FSB. That'll give you way more performance anyways.
 
i'd like to get up to around a 375 - 400 fsb, but when i try to achieve this with the memory set on auto it won't post. And if i set the ram on 800 and teh fsb on 400 it won't post. Do i need to change my voltages?
 
most of the time if you're uppin your fsb, you'll need more voltage. forgot how much i threw into my ram. but you seem fine if you can run it at 500+. hard to find a balance... i remember oc'n with an e6400. i liked the e6300 because i could just go all out on the fsb without worrying. if you can set mult, up and down then it'd be fine, but most boards arent unlocked yet.
 
which bios are you using? that biostar is known to be great in the fsb department. i'd aim vcore to 1.4v, 1:1 and try 400fsb and see what happens
 
I've always aimed for 1:1, but the way things worked out for a new build (ds3, e6600, and 890 overclocked ram) I'm using 4:5, and like it's said above, it's fine and optimizes my RAM.

M
 
losen your ram timings a little, give the memory 2.1 or 2.2V and try setting your FSB to your desired number. If necessary, add a ram divider. Only add processor voltage, when everything else fails....and then i would not start at 1.4V but a littler lower.
 
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