Question about Acer Aspire E380-UD420A (ASE380-UD420A) PC Desktop
I am running 1.5 gb of pc 4200 RAM in an acer aspire E380. I installed a fourth stick of 512 today. To my surprise i booted to a memory dump, aka. Blue screen of death. I quickly removed power from the system and then removed the fourth stick. I booted a second time and had to let Vista run a repair due to the crash. After the check was run windows determined i had "errors" on my C: drive. I let chkdsk run its self on startup. I rolled back to a working date. Now here is where i am stumped. I can not get my back four USB ports to run my mouse, it will accept my usb keyboard, but not mouse. Also i have 1.5 gb of memory installed as i stated earlier. On boot acer has a widget setup that will tell you the amount of ram that is currently available. Since this blue screen, i can only access 128 mb of my total 1.5 gb installed. meaning it is only accepting one stick of 512. what happened to the other 2? I have spent all day looking and attempting to fix this issue, the more i try the more i get frustrated. i am ready to throw my pc out the window and start from scratch. Any help you can give me would be greatly appreciated, Thank you ,
Issue solved. I found that my thirs slot for my ram is completeley fried. Have no idea as to how it happened, it must be a default problem from the company. But i had to remove all the ram and hold my power button down for 30 seconds with the cord disconnected to reset. Of course acer was no help in this issue and wanted to charge for information, thanks to all those who post on forums. You saved my a bunch of money.
Posted on Dec 18, 2008
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Posted on Jan 02, 2017
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Jan 23, 2012 | E-Machines T5082 PC Desktop
Dual-channel architecture requires a dual-channel-capable motherboard and two or more DDR, DDR2 SDRAM, or DDR3 SDRAM memory modules. The memory modules are installed into matching banks, which are usually color coded on the motherboard. These separate channels allow each memory module access to the memory controller, increasing throughput bandwidth. It is not required that identical modules be used, but this is often recommended for best dual-channel operation. It is possible to use a single-sided module of 512 MB and a double-sided module of 512 MB in dual-channel configuration, but how fast and stable it is depends on the memory controller.
If the motherboard has two pairs of differently colored DIMM sockets (the colors indicate which bank they belong to, bank 0 or bank 1), then one can place a matched pair of memory modules in bank 0, but a different-capacity pair of modules in bank 1, as long as they are of the same speed. Using this scheme, a pair of 1 GB memory modules in bank 0 and a pair of matched 512 MB modules in bank 1 would be acceptable for dual-channel operation.
Modules rated at different speeds can be run in dual-channel mode, although the motherboard will then run all memory modules at the speed of the slowest module. Some motherboards, however, have compatibility issues with certain brands or models of memory when attempting to use them in dual-channel mode. For this reason, it is generally advised to use identical pairs of memory modules, which is why most memory manufacturers now sell "kits" of matched-pair DIMMs. Several motherboard manufacturers only support configurations where a "matched pair" of modules are used. A matching pair needs to match in.
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