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TW3X4G1333C9DHX on asrock p43twins1600 dont work at 1333! only 1066


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mainboard recognize module only at 1066

i have made many many test in bios,but nothing!

in every configurazion like frequency1333/ the more high value of latence/ flexibility mode on / voltage from 1,45 to 1,71


the module start as ddr3 800 or ddr 1066 or system don't start!

black screen...

i contacted asrock teams.they have no solution due to they have no this module to test.. :(



thanks thanks

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I would encourage testing them on another make of MB to be sure. but please make sure that you have the latest bios and load setup defaults and then set the memory Voltage to 1.8 Volts then set the timings manually to the tested settings for the specific module you have, and test the modules one at a time with http://www.memtest.org to be sure one is not failing. If you still get errors, please follow the link in my signature “I think I have a bad part!” and we will be happy to replace them or it! However, if you get errors with both modules that would suggest some other problem and I would test them in another system or MB to be sure. In addition, with some MB's (Mostly ASUS) you have to disable legacy USB in the bios when running any memory test.


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Download Memtest86+ V2.01 from--->

and burn the Memtest ISO Image to a CD.

Download CPU-z from

Enter your BIOS. Load Setup Defaults. Save Setup Defaults. Set to these values:

BIOS Setup Utility


CPU Configuration

Overclock Mode = Manual
CPU Frequency = 333
PCI-E Frequency = 100
Boot Failure Guide = Enabled
Spread Spectrum = Enabled

Chipset Configuration

Memory Remap Feature = Disabled
DRAM Frequency = 667 (DDR3-1333)
Flexibility Option = Disabled
DRAM tCL = 9
DRAM tRAS = 24
DRAM tRP = 9
DRAM tWR = Auto
DRAM tWTR = Auto
DRAM tRRD = Auto
DRAM tRP = Auto
All Else to Auto

DRAM Voltage = 1.6v


If you are not able to do this, burn an ISO or find the settings, then print this out and get someone who can help you to set these values.


Boot to the Memtest CD and allow for two full passes. Then, if stable, enter Windows and run CPU-z. Post screenshots of CPU-z's CPU, Memory and SPD tabs. Finally post a screenshot of Real Temp.

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