Crucial 4GB (1x 4GB) DDR2-667 PC2-5300 1.8V DR x8 240-pin UDIMM RAM Module
This 4GB (1x 4GB) DDR2 667 MT/s Dual rank, x8 configuration RAM module from Crucial is for use in DDR2 compatible systems and operates at 667 MT/s with an overall transfer rate of PC2-5300.
This RAM module also operates at a standard voltage of 1.8V and is designed to allow you to run more applications simultaneously, switch between them faster, and provide a smoother computing experience.
|Capacity||4GB (1x 4GB)|
|Speed||DDR2-667 - 667MT/s - PC2-5300|
|Form Factor||240-pin UDIMM|
|Pieces in Kit||1|
You can verify the compatibility of this RAM module in a number of ways:
- Use the RamCity Finder to see all guaranteed compatible RAM upgrades for your brand and model system or motherboard
- Search online to see if this product is on the QVL (Qualified Vendor List) for your system or motherboard
- Contact one of our Upgrade Evangelists for an expert opinion
Why is the speed of this RAM module shown as 667 MT/s instead of 667 Mhz?
When it comes to measuring DDR RAM speed, MT/s and MHz are used interchangeably, which is not actually correct.
DDR stands for double data rate which means data is transfers on both the rising and falling edges of the clock signal. Meaning that the transfer rate is roughly twice the speed of the I/O bus clock. This RAM module runs at 333MHz per second, but the effective rate is 667 megatransfers per second (MT/s) because there are 333 million rising edges per second and 333 million falling edges per second of a clock signal running at 333 MHz.