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Latency problem in CPU-Z with TwinX PC3200C2


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I have 2 modules of PC3200C2, which specified timings are 2-3-3-6 with intel platforms. But the SPD timings table give the default values 3-3-3-8, as for ordinary PC3200 module (as shown with CPU-Z 1.26) ! To give the right values I have to disable the auto-SPD timings configuration in the bios and give the "right" values myself. I don't understand why the values specified by Corsair don't match with the ones written in the SPD.

When I give the right values, the system is stable but I get lower score with PcMark2k2 !!!

What's wrong with my RAM ?

Thanks in advance.

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  • 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;

TwinX1024 or TwinX512-3200C2

Advanced/Jumper Free

AI over clocking: Manual

CPU Freq: 200

DRAM Clock: 400 MHz

Memory or Dim Reference voltage: 2.75 Volts

System performance: AUTO

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


Configure Dram timing by SPD: Disabled/User define

SDRAM CAS Latency: 2T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 6T

SDRAM Burst Length: 8

Memory Acceleration Mode: Auto

USB Legacy Support: Disabled

All other settings should be set to default settings!

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!

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I tested the RAM with the settings you told me with memtest => OK.

Then I launched PcMark2k2 and my Memory Score...dropped by more than 1,000pts compared to the result with 3-3-3-8 timings ! (from 8686 to 7660 and I dit the bench three times) :(: That's a bit disappointing for C2 RAM...

I really don't understand

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