My gifted Optilex 760 has installed 2 GB of ddr 2 800 Hmz.
Would 2 Adata ddr2 of 2 GB 800 Hmz modules be suitable for my computer or does the ram modules have to be the same brand as the original ram installed by Dell.
I am very new tech upgrades so any advice would be much appreciated.
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As long as they are the same specs for the computer it doesn't matter the name brand.
|Type||667-MHz, 800-MHz DDR2 SDRAM|
|Memory connectors||Desktop, mini-tower, or small form factor: four
ultra small form factor: two
|Memory capacities||512 MB, 1 GB, 2 GB, 3 GB, or 4GB non-ECC|
|Minimum memory||512 MB|
|Maximum memory||8 GB|
The OptiPlex™ 760 system supports up to 8 GB of memory with a 32 bit operating system. The memory speeds supported are 677 MHz and 800 MHz DDR2 memory. Both dual-channel and single-channel configurations are supported.
Like DDR, DDR2 is also SDRAM-based architecture with double data rate. But unlike DDR, DDR2 has some additional features, including 4N data prefetch, differential strobes for greater noise immunity and to improve timing margins, on-die termination (ODT) to improve signal integrity, and off-chip driver calibration (OCD) to improve system timing. DDR2 SDRAM supports Suspend-to-RAM and provides enhanced power management features (Power Down mode).
In 2004, the computer industry moved to a next-generation memory architecture called DDR2 to allow it to continue implementing faster and higher-density main memory solutions.
The transition from DDR to DDR2 is more evolutionary than revolutionary. DDR2 architecture is the same DRAM-based technology the industry has used for years but with some enhancements:.
As the old saying goes, "You can't get something for nothing." Along with increased memory performance, DDR2 has a few new design challenges:
DDR memory can run in dual-channel mode, which allows the system to have twice the memory bandwidth using the same memory technology.
The MT chassis has four memory connectors. To achieve dual-channel performance, the total memory in each channel must be the same. If the channels do not match or if the system has only one DIMM installed, the system memory operates in single-channel mode. The system works normally in single-channel mode, but the user loses the benefit of increased memory throughput.
Dual-channel mode is always present when both memory channels are populated. However, for dual-channel performance, the size of the modules must match.
The memory slots are keyed for DDR2 memory and cannot accept other modules. The memory modules themselves are also keyed differently. DDR RAM has 184 pins while DDR2 RAM has 240 pins. The new DDR2 memory modules physically look different than previous modules.
Use care when installing memory modules into the connectors. A greater amount of force is needed to install the DDR2 SDRAM DIMMs than on older systems.
Recommended Memory Configurations
NOTE: Use non-ECC memory modules only as ECC modules are not supported.
Be sure to install a single memory module in CHA_DIMM, the connector closest to the processor, before installing a module in the other connector.
|Channel A||Channel B||BIOS Says||Performance|
|DIMM||No DIMM||Single Channel||Single channel|
|DIMM||Same as channel A||Dual Channel Interleaved||Dual Channel Interleaved|
|DIMM||Same as channel A except speed||Dual Channel Interleaved
(in lowest DIMM speed)
|Dual Channel Interleaved
(in lowest DIMM speed)
|DIMM||Same as channel A except density||Dual Channel Interleaved||Dual Channel Interleaved|
|DIMM||Same as channel A except size||Dual Channel Asymmetric||Single Channel|
|No DIMM||DIMM||Single Channel||Single channel|
* Definition for interleaved is found here: http://en.wikipedia.org/wiki/Interleaved_memory
Basically, when both DIMM connectors are populated, the system has dual-channel performance unless channels A and B have different amounts of memory.
In some cases, DDR2 memory may not have the MHz listings for speed on the memory. To determine the speed, use the PCXXXX designator and divide by 8.
|PC5300 divided by 8 = 667 MHz|
|PC6400 divided by 8 = 800 MHz|
It would be better to have similar modules however it doesn't have to be the same brand or speed, in case of miss matched speeds, the lowest module speed will be used.