A7V8X - DDR333 to DDR400, how much gain??

I have the A7V8X, KT400. I am running 2 sticks of 256MB DDR333 CL2.5-3-3-7. i am planning to get one stick of 512MB DDR400 CL2. How much performance gain wud i get?

Also, if anyone has the KT400 mobo, have u tried running the FSB at 200?? is it stable?


<b><font color=red>237</font color=red> posts and i am still a <font color=blue>MEMBER</font color=blue>...</b>

tnx for the info FOBT.
Personally, I did run at FSB 207 with one stick of 256MB DDR333, but i did not run that setting long enough to see if the system was absolutely stable( I think i ran it for a couple of hours). I was running BIOS Rev 1009 and Win98Se then. With that BIOS Rev, i cud set my RAM Freq at 333 even when the FSB was set to 400. But, unfortunately, subsequent BIOS Rev do not allow that.

Then, I was running at 2140MHz (12.5*171) at 1.9V Vcore on Win98SE. I upgraded to Win XP Home and this setting was not stable at all, even at 2.0V Vcore. SO i had to set it up to 12*166 = 2000MHz, which incidentally runs fine even at 1.675V Vcore. Anything higher than this and i have to increase the Vcore drastically to 1.9V again. So, I am happy with 2000MHz. Right now i am on BIOS REv 1012. TOday i updated to Rev 1013Beta01.

I am planning to revert to Rev 1009 and see if i cud hit FSB 200. The problem is now i have 2*256MB = 512MB. I did try to use only 256MB to see if i cud hit FSB 180 and upwards. But Win XP runs like crap with the applications with 256MB. so i put back the other 256MB. I wish i had bot a nForce2 mobo and saved myself all this pain

<b><font color=red>250+</font color=red> posts and i am still a <font color=blue>MEMBER</font color=blue>...</b>

The AGP card that I have right now is Radeon 9700 Pro, but I think I did something bad to the RAM. I overclocked the RAM once and went too high, there was some degradation in the image but stability was still ok. Ever since then, my scores in 3DMark went down quite a bit (about 500 marks in 3DMark03). So I think I ruined my RAM on that vid card. It'll soon be replaced by ATI 9800 Pro 128MB. Check my sig for current 3DMark03 scores (5k+). I haven't run 3DMark2001SE in quite a while so I'm not too sure what scores it'll get on there.

<A HREF="http://www.anandtech.com/mysystemrig.html?id=24106" target="_new">My System Rig</A>
<A HREF="http://service.futuremark.com/compare?2k3=535386" target="_new">3DMark03</A>

anyone else with more ideas???

<b>thinking of a good sig. till then...</b>

<A HREF="http://www.memtest86.com/#download0" target="_new">Clickable download</A>

If this is regarding my post saying I have bad RAM, I'm talking about the RAM thats on my vid card, not on the mobo. So this won't work for me, I already have this program anyway and my system RAM is just fine. Its the RAM on my Radeon thats probably gone south.

<A HREF="http://www.anandtech.com/mysystemrig.html?id=24106" target="_new">My System Rig</A>
<A HREF="http://service.futuremark.com/compare?2k3=535386" target="_new">3DMark03</A>