Duff memory?

Vertigo

Vertigo

Vertigo

Soldato
Joined
28 Dec 2003
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Just built new system with some Corsair XMS2 PC6400 4-4-4-12

Noticed that, according to CPU-Z, whilst the SPD does indeed show the above settings at 400Mhz, it was actually running at 5-5-5-18.

What's more worrying is that if I try to force the 4-4-4-12 (or just setting the first to 4 and leaving the remainder on Auto) prevents the machine from booting and I have to reset the BIOS!

Have I got duff memory here? I paid for CAS4 stuff so why isn't it running at CAS4!? Mobo is an Abit IP35.
 
Have you tried more voltage? they should run those timings at stock vdimm tho.

Edit: they need 2.1v for 4-4-4-12, see the corsair site.
 
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the SPD tells it to run at 5-5-5-18 as it cant tell the board what voltage to run at, you need to manually set voltage and timings
 
Ah right, presumed the rating meant they'd run at 4-4-4-12 at stock voltate (BIOS says this is 1.80v atm - that right for stock?)
 
1.8v is the stock voltage for DDR2, and that's what the motherboards will initially run all DDR2 memory at.
 
Vertigo1 said:
Ah right, presumed the rating meant they'd run at 4-4-4-12 at stock voltate (BIOS says this is 1.80v atm - that right for stock?)
Click to expand...
The SPD stock settings are intentionally conservative so that the memory will boot with the widest variety of MOBOs at stock settings. You will need to set the voltage and timings manually.
 
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