Jump to content
Corsair Community



Recommended Posts

I've bought today 1 piece of Corsair vs512MB400.

I put it in,BIOS shows it works at 400 MHz,but when i run benchmark memory tests ,like Everest or SiSoft Sandra,my computer performs very low

Even more,in Everest it says i have PC1600 DDR.

I observed my computer has the same performance as it is using PC1600 memory,although my memory is recognized as PC3200.

Why is that?

My configuration is:

processor:AMD Athlon XP 1700+

MB:DFI AD77 PRO(latest BIOS)

i have only one slot occupied.

Please HELP.

Another thing:if i set my memory to 333Mhz the tests show the right results.

For example,in EVEREST:


Read test:1450 MB/s if my memory is set at 400 MHz

1950 MB/s if my memory is set at 333 Mhz

Link to comment
Share on other sites

I understand that i won't get a signifiant performance increase because i have a 266Mhz FSB CPU,but that doesn't mean that it performs very poor when i use 400 Mhz frequency.

Even if i want to overclock my processor,i can't do that because AD77 is a very poor overclocker.

And another thing:I observed in Everest that memory bus has a value of 200 when i use 400 Mhz frequency and when i downclock to 333Mhz in shows 333Mhz.

It seems that AD77 has a bug when i use 400Mhz memory.It recognizes it as 200Mhz memory

Does anyone knows anything about that.RamGuy please help me

Link to comment
Share on other sites

  • Corsair Employees

Please make sure that you have the latest BIOS for your MB and load Setup/Optimized default settings, and try the following BIOS settings;


CPU Freq: 133 MHz (266 FSB)

Memory Frequency: 266 or 333

Memory Timing: User Define

SDRAM CAS Latency: 2.5T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 8T

DDR Reference Voltage: 2.7 Volts

AGP Voltage: Default *unless you have ATI (9200 or 9600) or NVIDIA (5200 or 5700) then 1.6 Volts suggested!*

All other settings are motherboards defaults

Then please test them one at a time with http://www.memtest.org and let’s make sure it's not some other issue! I would run the test for at least 2-3 passes to be sure!

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Create New...