Posted: 8/18/2015 10:19:36 PM EDT
Bought a used Dell Optiplex 755 last week. It had issues, so the guy swapped it for a Optiplex 360. The 360 has a better processor, but only 2GB ram. So I ordered a 2GB ram upgrade on Amazon that showed up today. Popped of the side cover and there are two 1GB ram installed (I assumed only one 2GB  )Anyway, I replaced one with the 2GB and restarted and it still shows 2GB. Did I get a 1GB labeled as 2GB? |
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Quoted: Are they both the same type of RAM (DDR2, DDR3)? Most motherboards won't recognize two different types of RAM. As for whether the upgrade was mislabeled, you could take out the 1GB stick and see if it still recognizes it as 2GB to make sure. I will try that. |
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Quoted: I removed one of the 1GB sticks and installed the 2GB stick and it showed 2GB RAM memory total. I removed the 2GB and it showed 1GB RAM memory. What slots are you using? What does your motherboard manual say about ram/slot configuration? Did you clear the CMOS? |
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Quoted: What slots are you using? What does your motherboard manual say about ram/slot configuration? Did you clear the CMOS? Quoted: Quoted: I removed one of the 1GB sticks and installed the 2GB stick and it showed 2GB RAM memory total. I removed the 2GB and it showed 1GB RAM memory. What slots are you using? What does your motherboard manual say about ram/slot configuration? Did you clear the CMOS? I used one of the RAM slots that had one of the 1GB sticks in it. Don't have a manual. Hugh??? Total noob here  |
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As others said the memory needs to be alone or in equal pairs, so your 1gb and 2gb won't work.
ETA: http://www.dell.com/downloads/emea/products/optix/optiplex_brochure_360_en_new.pdf MEMORY Your computer supports a maximum of 4 GB of memory when you use two 2-GB DIMMs. Memory modules should be installed in pairs of matched memory size, speed, and technology. If the memory modules are not installed in matched pairs, the computer will continue to operate, but with a slight reduction |
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Quoted:
I used one of the RAM slots that had one of the 1GB sticks in it. Don't have a manual. Hugh??? Total noob here
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I removed one of the 1GB sticks and installed the 2GB stick and it showed 2GB RAM memory total. I removed the 2GB and it showed 1GB RAM memory. What slots are you using? What does your motherboard manual say about ram/slot configuration? Did you clear the CMOS? I used one of the RAM slots that had one of the 1GB sticks in it. Don't have a manual. Hugh??? Total noob here
Clearing the CMOS is using a little jumper on the motherboard or removing the coin battery from the motherboard to reset the bios. It is something I did fairly often when I ran into RAM/motherboard issues. Quoted:
It has been a while, but if memory serves, all memory chips have to be the same size for them to be recognized properly. You can't mix a 1gb and a 2gb and expect 3gb, as best case scenario you would only see 2gb with that configuration. Not true at all... Edit- Quoted:
As others said the memory needs to be alone or in equal pairs, so your 1gb and 2gb won't work. And you will need a 64 bit processor to see above 4gb of memory. ETA: http://www.dell.com/downloads/emea/products/optix/optiplex_brochure_360_en_new.pdf MEMORY Your computer supports a maximum of 4 GB of memory when you use two 2-GB DIMMs. Memory modules should be installed in pairs of matched memory size, speed, and technology. If the memory modules are not installed in matched pairs, the computer will continue to operate, but with a slight reduction That is for Dual channel mode which is going to be negligible impact when using a C2D. |
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Quoted: OP, can you post the Amazon link to the RAM upgrade? http://www.amazon.com/gp/product/B0035H5M3K?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00 |
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Quoted: Doesn't matter anyway as that system is limited to 4GB. OP should buy another 2GB stick. Chop/Chop OP! Quoted: Quoted: That is for Dual channel mode which is going to be negligible impact when using a C2D. Doesn't matter anyway as that system is limited to 4GB. OP should buy another 2GB stick. Chop/Chop OP! Done and thanks for everyone's help. |
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x86 processors usually cut RAM off at 3GB. |