Computer does not see the new RAM

bruce T

Distinguished
Jan 24, 2012
6
0
18,510
Hello. I don't know much about the computer's inside.
I have a Dell XPS 435T/9000 4 years old. I wanted to upgrade the RAM so Dell told me use oc3-8500 with 4Gb max for each slot. So Best Buy said I can use PNY pc3-10666. I have 6 slots and each one has one 1 Gb ram. I replaced two slots with the new 4 Gb RAMs. After I started the computer, it only showed 4 Gb. Then I removed the new ones and put back the original (old) ones back. It still showes that I have 4 Gb of total RAM. I am pretty sure I did not damage the slots. I moved around the old RAMs to see what happens. It looks like that the computer can't see those two slots!!! :( Now I am afraid to try other slots with the new ones. Please help and comment. Thank you.
 
Solution
Do you have your computer's manual?
Have you tried clearing the CMOS?

Just to clarify, this is your Dell's motherboard?

Dell Studio XPS 435T 9000 Intel Core i7 CPU 920 2 67GHz Desktop Mother Board | eBay
http://www.ebay.com/itm/DELL-STUDIO-XPS-435T-9000-INTEL-CORE-I7-CPU-920-2-67GHZ-DESKTOP-MOTHER-BOARD-/141440899894?pt=US_Motherboard_CPU_Combos&hash=item20ee88db36

Which of these machines is like yours?

Dell Studio XPS 435 Desktop Details | Dell
http://www.dell.com/us/dfh/p/studio-xps-435/pd

Dell Studio XPS 9000 Desktop Details | Dell
http://www.dell.com/us/dfh/p/studio-xps-9000/pd
How are you looking? What OS are yu running? Id you boot Windows XP and ask it, then the 32-bit Windows XP can't see or use more than 4 GB or RAM.

If you look somewhere in the BIOS, then that may indicate some other issue. Also, having 6 RAM slots are really weird. I'll look up your computer specs soon, but I can't remember when last triple-channel memory was a motherboard feature. Are you sure you have 6 RAM slots?
 

MIJ-VI

Distinguished
Mar 28, 2010
56
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18,660
Do you have your computer's manual?
Have you tried clearing the CMOS?

Just to clarify, this is your Dell's motherboard?

Dell Studio XPS 435T 9000 Intel Core i7 CPU 920 2 67GHz Desktop Mother Board | eBay
http://www.ebay.com/itm/DELL-STUDIO-XPS-435T-9000-INTEL-CORE-I7-CPU-920-2-67GHZ-DESKTOP-MOTHER-BOARD-/141440899894?pt=US_Motherboard_CPU_Combos&hash=item20ee88db36

Which of these machines is like yours?

Dell Studio XPS 435 Desktop Details | Dell
http://www.dell.com/us/dfh/p/studio-xps-435/pd

Dell Studio XPS 9000 Desktop Details | Dell
http://www.dell.com/us/dfh/p/studio-xps-9000/pd
 
Solution

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