2 rams 800 MHZ 3 OR 4 ram STICKS 667 MHZ SAME MATCHED ram

[74 WAJEEH]

I PURCHASED A DELL OPTIPLEX 960 (Q45 CHIP).I INSTALLED 4 GB OF RAM 800MHZ BUT THEN I PUT ANOTHER 2 GB (800MHZ) RAM STICK SYSTEM SHOWS 667MHZ. THEN PUT ANOTHER 2 GB 800 MHZ RAM STICK.BUT SYSTEM SHOWS 667 MHZ.WITH TWO RAM STICKS SYSTM SHOWS 800MHZ BUT WHEN I PUT ANOTHER STICK WITH SYSTEM DROPED DWON TO 667.I RUN MEMTEST NO ERROR FOUND. PUT RAM STICKS ONE BY ONE SYSTEM SHOWS 800MHZ BUT COMBINED 667 MHZ I HAVE SAME MATCHED RAMS . I FACE THIS PROBLOM ON MY PREVIOUS DELL OPTIPLEX 760 (Q43 CHIP) PLEASE HELP ME. MY ALL RAM STICKS ARE FINE AND ALL ARE SAME 800MHZ .

 

[Tradesman1]

Just guessing, but prob the rig will support two sticks at 800, but for 3 or more it drops to 667, you might check for a BIOS update to see if that corrects the problem, but most prebuilts havea locked or semi locked BIOS , if it wasn't you could normally manually change the freq to 800 and increase the DRAM and/or MC voltage and be good to go.

 

[74 WAJEEH]

I ALSO UPDATED MY BIOS BUT NOTHING .IS ANY PERFORMENCE DIFFERENCE IN 667 MHZ AND 800MHZ
OR I AM OK WITH 667 ???

 

[Tradesman1]

Should be fine at 667, very little between 667 and 800

 

[74 WAJEEH]

IF I PUT 4GB AND 2GB RAM STICK WILL IT CHANGE ???

 

[Tradesman1]

Might, try and see