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computer memory question/problem - pc not booting

knewbold Avatar
8y, 3m agoPosted 8 years, 3 months ago
Hello
Recently i purchased some memory on here which i believe is http://www.play.com/PC/PCs/4-/931233/Computer-Memory-1GB-PC3200-DDR-400Mhz-184pin-DIMM/Product.html

Well the pc which has a ASUS P5rd1-v deluxe motherboard is having a few problems....

Previously i had some corsair XMS 3200 256mb (x4) chips = equalling 1 gig - the system ran fine

If i put any combination of these chips in with the new chip - the pc fails to post/ i dont even get any bios failure codes

If i put the new chip in by itself it boots perfectly...

If i put the new chip in with some old PC2700 chips it works.....
If i put the PC2700 chips in with the corsair - it works!!!!

now the play.com chip is clearly working - but does anyone know how to get the play.com/corsair combo working?

any ideas let me know
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knewbold Avatar
8y, 3m agoPosted 8 years, 3 months ago
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#1
I would suspect its the voltage. The old xms modules will require a higher voltage and your new ram a lower voltage. The old pc2700 will probably sit in between. So low and middle work, and middle and high work, but high and low will not work.
#2
Did you only buy one stick of the 1gb Play.com memory ?

If you did.....then this may be your problem as your motherboard is only supposed to support 'Matched Pairs' and i think your just lucky that some combinations work. It should tell you in your motherboard manual.

or buy another stick from Play.com and put 2gb in it ! :thumbsup:
#3
some memory modules simply do not work together, voltage as above is just one of the reasons but another one is the chip manufacture which simply wont work in a combo
#4
these are probabley not compatible with each other with them being different makes

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