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2 X 512 TWINX XMS4000v2.1 + 2 X 512 TWINX XMS4000v1.1, will it work?


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Hi i have 2 X 512 TWINX XMS4000 v1.1 and I got offered a pair of 2 X 512 TWINX XMS4000 v2.1 to bring my system up to a total of 2gb :)


Will the v1.1 and v2.1 work togheter or will i run into problems?


My system is


abit IC7 G

P4 3.2 512 800 Northwood

1gb (2X 512) TWINX XMS 4000v1.1

BFG 6800 GT

Echo Layla 3G PCI Sound Card



Thank you



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  • Corsair Employees


You are welcome to try it, but we do not officially support more than one set of Twinx modules in any system. Sorry. In addition, you may not be able to over clock your system with more than one set of modules because of chipset loading with all four slots filled. I would suggest you set the timings manually to whats listed bellow for best performance with 4 modules.

Please try these settings after you load setup defaults.


CPU Freq: 200 MHz

Memory Frequency: 100%/DDR400

Dim Voltage to 2.85 Volts (but if you over clock 2.85 Volts)

Resulting Frequency: 200MHz/400DDR

Legacy USB: Disabled

SDRAM CAS Latency: 3T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 8T

Then test the system with http://www.memtest.org, but when using any memory test you will need to disable legacy USB support when running the test.

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thank you for the info,

so do you reckon i will have no problem with 1.1 and 2.1 mixed togheter?


Can you please eplain a bit more why I won't be able to overclock with 4 stick of ram?


Thank you I really appreciate your input :)


Best regards



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