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2x512 PC3200LL not as fast as 2x256 PC3200LL??


DrBeer

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I had 2x256mb Corsair XMS PC3200LL and upgraded to 2x512mb Corsair XMS PC3200LL. With the 2x256 I was able to run at a 225mhz FSB with 11-2-3-2.0 timings at 1.720v. Ran memtest86 for 6 hours on this setup with no issues and Prime95 for 30+ hours with no errors. I get the 2x512 and I can't go past 205mhz 11-2-3-2.0 with any voltage before memtest starts giving errors. Also, I can't seem to set my RAS to CAS from 3 down to 2. In the BIOS it is set at 11-2-2-2.0 but when you check CPU-Z or AIDA32 they show as 11-2-3-2.0. So, the RAM is obviously the limitation to my OC. Does anyone know if the 512 modules have a lower OC overhead (which I doubt) or if I just happened to get a pair that barely made the LL cut? Or possibly it's just my BIOS needs more tweaking... any ideas? GA-7N400 Pro F11 AMD Barton2500+ 2x512 Corsair XMS PC3200LL 450w Allied True Power PSU
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  • 3 weeks later...
[QUOTE][i]Originally posted by Mr_Soundshaker [/i] [B]I don't think a precharge delay of 11 is fast anyway. Can u explain that to me plz? [/B][/QUOTE] [URL=http://www.houseofhelp.com/forums/showthread.php?s=&threadid=14461]THIS [/URL] should explain it. Dr. Beer, I'd run the Memtest on your RAM and see if you possibly got a weak stick or something with the new stuff. In theory a DS DIMM (the 512mb DIMMs are double sided) should perform slightly better than the SS DIMMS (the 256s are single sided). Mike
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That's intersting! So that's actually the setting to fine tune the memory, at the moment i'm busy finding out what's best for my memory. I did notice when it's on 11 the reading goes faster but the writing goes down slightly, on 9 writing goes up and reading too but not that high as 11. Thanx for the info anyway. I'm sorry i can't help with your prob, i'm still busy to squeeze the highest stable performance out of my rig here.
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