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Shuttle SB51G and (2)CMX1024-3200C2PT


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I tried upgrading my (2) Corsair CMX512-2700C2 to (2) CMX-1024C2PT.

I installed the memory and got the machine to boot but encountered error messages and eventually blue screens.


The old mem was running at 2-5-2-2


The new memory specs show it 'was tested' at 2-3-3-6 2.75V


The board only has the options [1.5,2,2.5 or 3] - [7,6, or 5] - [3 or 2] - [3 or 2] There is no option to adjust the voltage of the CPU or the memory, but you can select the FSB from 133 up to 165MHz.


When I used the memory configurator (and searched by Corsair Part Number) it showed that the SS51G (SiS 651 chipset) was compatible with the CMX1024-3200C2PT. It didn't list my SB51G. Before buying, I may have accidently searched for CMX1024-3200PT and found my computer. What's strange is that I'm running CMX512-2700C2 which wasn't listed and when I searched "TWINX1024-3200C2PT" it shows that it is compatible with my computer. Is there something special about TWINX1024-3200C2PT or is it just (2) CMX1024-3200C2PT?

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Since you are moving from one set of DRAM to another, I propose a hard reset of your system.


  1. Remove the ATX/BTX Power Plug.
  2. Remove the Power 20/24 pin connector (Motherboard)
  3. Remove the Power 4-pin 12 volt connector (Motherboard)
  4. Remove the CMOS Battery
  5. Remove the RAM
  6. Remove the Video Card
  7. Remove all other PCI Cards
  8. Press the Power Button and hold for 10 seconds to drain mainboard components


Let stand for a few hours

  1. Replace the Power 20/24 pin connector (Motherboard)
  2. Replace the Power 4-pin 12 volt connector (Motherboard)
  3. Replace the CMOS Battery
  4. Replace the RAM
  5. Replace the Video Card and PCI Cards
  6. Replace the ATX/BTX Power Plug


If you can now enter your BIOS. Enter the BIOS and load default settings. Set your DRAM Vdimm to 2.7v. Restart.


Download Memtest from http://www.memtest.org and burn the image to a CD. Do this from another computer. On your computer, boot from the CD and allow a full pass test.


Do the DRAM modules Pass. If not, remove one and test it in single mode. Do the same with the other stick. Do both sticks pass?

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Ok. Sounds thorough. Note: My bios doesn't have an option to adjust the voltage of the memory.

So I might not be able to follow the step, "Set your DRAM Vdimm to 2.7v."


I'm going to look for a bios update and see if that changes anything, but I get the feeling like not being able to set the voltage may be the problem.


Here's a review (from 2002) that addresses the bios.


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I updated to the most recent bios. There are a few more settings, but no ability to set voltage. In the pc health parameter, there is a category "2.5V" and it shows the voltage at 2.57V. Does this refer to the memory? If so, is that too low for these sticks? Will they run at 2-5-2-2 even if I go through the above steps?
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