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You can upgrade your Dell OptiPlex GX620 SFF upto a maximum of 4.0 GB, with maximum of 1GB per slot in 4 (2 banks of 2) memory slots. The Dell OptiPlex GX620 SFF takes the PC2-4200 DDR2 SDRAM DIMMs. Supports Dual Channel DDR. Memory Type.

What are memory sockets or slots and how are these divided into bank?

Memory Sockets or Slots are the place where memory RAM modules are inserted in the motherboard. The Dell OptiPlex GX620 SFF has 4 (2 banks of 2) memory expansion slots. A memory bank is a group of memory expansion sockets, a bank must be completely filled with memory modules of the same size and type in order for the system to recognize and address the memory. i.e. :

2 sockets (2 banks of 1) This indicates that there are 2 memory slots. These are divided into 2 banks, and each bank consists of one memory slot. So you can add memory one piece at a time for the system to use.

3 sockets (3 banks of 1) This indicates that there are 3 memory slots. These are divided into 3 banks, and each bank consists of one memory slot. So you can add memory one piece at a time for the system to use.

4 sockets (2 banks of 2) This indicates that there are 4 memory slots. These are divided into 2 banks, and each bank consists of two memory slots. So you must add memory two pieces at a time (they must be the same size and type of memory) in order for the system to benefit from the upgrade.

8 sockets (4 banks of 2) This indicates that there are 8 memory slots. These are divided into 4 banks, and each bank consists of two memory slots. So you must add memory two pieces at a time (they must be the same size and type of memory) in order for the system to benefit from the upgrade.

12 sockets (3 banks of 4) This indicates that there are 12 memory slots. These are divided into 3 banks, and each bank consists of four memory slots. So you must add memory four pieces at a time (and they must be the same size and type of memory) in order for the system to benefit from the upgrade.

How do I install memory on my Dell OptiPlex GX620 SFF?

Memory installation help guides can be found at the following link.

Memory Installation Guide

184-pin DDR DIMM Installation Guide

168-pin SDRAM DIMM Installation Guide

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12y ago
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14y ago

It has 2 DIMM slots Non-ECC dual channel shared2 DDR2 SDRAM system memory (400 and 533Mhz) up to 2GB maximum.

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11y ago

It is depends on the type of that computer. Dell Optiplex GX520 desktop computer has 512 megabytes of RAM and Dell Optiplex 390 has 2 gigabytes of RAM installed.

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Q: How much ram memory can you put on a dell OptiPlex gx520?
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