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O/C?? - TWINX1024-4400C25, DFI LP NF4 SLI-DR, A64 4000+ (San Diego)

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I'm technically adept, having built systems, run networks, etc, etc.


I purchased my hardware with the intention of some real slick performance. However, I find the Genie Bios on this DFI mobo and all the variables entailed in overclocking quite daunting. :eek:


I assume this hardware combination is pretty common. Do you folks have any primers, suggestions, or resources for tuning this RAM (and CPU/mobo) up for maximum performance? The more arcane BIOS variables are downright confusing. I've got the Zalman 7000 Pure Copper cooling the Athlon.


I've culled various forums and haven't gotten together as much info as I need. Any help would be much appreciated. Thanks guys! :):



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Welcome to the forums, jmelvin!


I'll tell you a couple of things. First, the following settings for the memory should allow it to run at 275MHz (of course, your hardware may not be able to run that fast, but the modules have been tested at this speed) so if you set them, you'll be able to confidently overclock without worrying that the memory is holding you back. Take note of the 275MHz external frequency... this would be the maximum rate these modules are garaunteed for. Your actual frequency will start at 200MHz, then increase as you overclock.


XMS Qualification and Testing


Testing parameters for TWINX4400C25:


TWINX1024-4400C25 Data Sheet


Each pair is tested and packaged together using the following settings:

CPU External Frequency: Manually set to 275MHz

DRAM Clock: Manually set to 1:1 or 400MHz

SDRAM CAS Latency: 2.5T

SDRAM RAS to CAS Delay (tRCD): 4T

SDRAM Row Precharge (tRP): 4T

SDRAM Active to Precharge Delay (tRAS): 8T

SDRAM Bank Interleave: 4 Bank


All other settings are motherboard defaults.

Maximum recommended VDIMM: 2.9


You may find several posts showing incompatibilities between Corsair memory and DFI based systems and it's pretty much all those 'arcane' settings that're at fault.


Secondly, I won't pretend to have any idea about most of the options DFI gives it's users in their BIOS's. I have to reccommend you go to DFI-Street and ask one of their official staff members what they should be set at for your particular setup.




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I'll give things a try when I get home. I need to investigate a bit more on DFI-Street. Thanks for all the information, Candy-Kid! I hope to push things up to 290MHz... we shall see. I will definately post back here after my girl Sandra (SiSoft) checks things out.



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