can I combine DDR2 256MB and DDR2 512MB in upgrading my laptop's RAM.?

Question

The laptop supports dual channel and is upgradeable to 2GB using DDR2 modules.

Answer 1

Alvin, no, but I would check out the specs for your particular laptop before purchasing. The majority of systems supporting dual-channel memory can be configured in either single-channel or dual-channel memory mode. The fact that a motherboard supports dual-channel DDR memory, does not guarantee that installed DIMMs will be utilised in dual-channel mode. It is not sufficient to just plug multiple memory modules into their sockets to get dual-channel memory operation - users need to follow specific rules when adding memory modules to ensure that they get dual-channel memory performance. Intel specifies that motherboards should default to single-channel mode in the event of any of these being violated:

* DIMMs must be installed in pairs
* Both DIMMs must use the same density memory chips
* Both DIMMs must use the same DRAM bus width
* Both DIMMs must be either single-sided or dual-sided.

DDR SDRAM DIMMs have 184 pins (as opposed to 168 pins on SDRAM, or, 240 pins on DDR2 SDRAM), and can be differentiated from SDRAM DIMMs by the number of notches (DDR SDRAM has one, SDRAM has two).

Use this online utility to check your laptop for the specific data regarding your laptop's memory requirements.
http://www.memoryx.net/

For optimum performance and to avoid potential memory incompatibilities, you should purchase ALL your memory from the same manufacturer - check your current RAM to see which one it is. Mixing the memory modules can sometimes cause failures.

Answer 2

the ddr2 ram will in difficulty-free words run on the sluggish speed of the ddr ram , your motherboard also needs to help ddr2 with is maximum intel forums in the the perfect 6 months. AMD motherboards dont help ddr2. notwithstanding the hot AMD AM2 processor and board does help ddr2

Answer 3

You can do that, but they won't run in dual channel mode, you need to matching sticks in order to run dual channel.

Answer 4

Why are you asking me?

Answer 5

sure