Jetway 645EM Motherboard Memory Upgrade

Give your Jetway 645EM a performance boost by upgrading its memory. Besides better performance, you will be able to have more applications running simultaneously.

Cheap memory is often the cause of random fatal exception errors, stop messages and reboots. Buy quality memory from here for a stable Jetway 645EM system. The computer memory upgrade choices listed here have been tested for quality and compatibility with your Jetway 645EM motherboard. In addition, you get a limited lifetime warranty and free technical support with your computer memory upgrade.

Jetway 645EM Motherboard Specs:

• 168-pin DIMM Banking: 2 (2 banks of 1)
• Chipset: SiS 645 (XP4)
• Error Detection Support: Non-ECC only
• Graphics Support: AGP 4X
• Max Unbuffered SDR SDRAM: 2048MB
• Module Types Supported: Unbuffered only
• SDR SDRAM Frequencies: PC100 and PC133
• Supported DRAM Types: SDR SDRAM only
• USB Support: 1.x Compliant

These 168-pin DIMM modules are compatible with your 645EM:

512MB SDRAM, PC133, CL=2, Unbuffered, Non-parity, 133MHz, 3.3V, 64Meg x 64

512MB SDRAM, PC133, CL=3, Unbuffered, Non-parity, 133MHz, 3.3V, 64Meg x 64

256MB SDRAM, PC133, CL=2, Unbuffered, Non-parity, 133MHz, 3.3V, 32Meg x 64

128MB SDRAM, PC133, CL=2, Unbuffered, Non-parity, 133MHz, 3.3V, 16Meg x 64

128MB SDRAM, PC100, CL=2, Unbuffered, Non-parity, 100MHz, 3.3V, 16Meg x 64

Jetway 645EM Memory FAQ

What does PC100 and PC133 mean?

This is the front side bus (FSB) clock speed of the memory. It is okay to run faster rated memory even if the installed CPU uses a slower FSB.

What does the CL number mean?

Column Address Strobe (CAS) Latency, or CL for short, specifies how many clock cycles the Jetway 645EM motherboard must wait before the memory module is ready to deliver the requested memory. The lower the CL number, the faster the access time.

However, the performance difference between CL=2 and CL=3 is so small that you will not notice any degradation in speed. Unless you are overclocking your Jetway 645EM, you do not need to worry about the CL rating. If you are overclocking, then going with a lower CL may help stabilize your Jetway 645EM motherboard.