RAM difference between PC100, PC133 and DDR memory
A computer with a mix of PC2100 and PC1600 DDR SDRAM will default to the slower RAM speed. If you need more info, check out Crucial.com’s amazging RAM guide. Go to Crucial.com and click the “Library” tab for lots more useful RAM information.
Crucial, has a tool that you can easy figure out what RAM your system needs. You just select your brand and make and model of the system and then Crucial shows you which RAM will work with your computer.
Memory speeds are written in different formats depending on the type of memory technology your computer uses. FPM and EDO speeds are written in nanoseconds (ns).
Memory Speeds |
| Technology | Speed | Module Bandwidth (max theoretical) |
|---|---|---|
| SDR | PC100 | 0.8 GB/sec |
| SDR | PC133 | 1.0 GB/sec |
| DDR | PC1600 | 1.0 GB/sec |
| DDR | PC2100 | 2.1 GB/sec |
| DDR | PC2700 | 2.7 GB/sec |
| DDR | PC3200 | 3.2 GB/sec |
| DDR | PC4000 | 4.0GB/sec |
| DDR2 | PC2-3200 | 3.2GB/sec |
| DDR2 | PC2-4200 | 4.2GB/sec |
| DDR2 | PC2-5300 | 5.3GB/sec |
| DDR2 | PC2-6400 | 6.4GB/sec |
The higher the number, the faster the memory; for example, PC133 is faster than PC100, and DDR is faster than SDR.
RAM Chart - RAM Speed Memory Specs
http://www.buildorbuy.net/ramchart.html#ramchart
Crucial System Online Scanner Tool
The Crucial System Scanner automatically analyzes your computer memory information and suggests an upgrade that’s guaranteed compatible.
Crucial System Scanner Requirements
To run the online system scanner you must:
- Be on a Windows-based system (Mac alternative)
- Use Internet Explorer® (IE alternative)
- Have ActiveX® installed
- Have JavaScript enabled
http://www.crucial.com/systemscanner/
Memory Experts at Crucial explain the most important terms you need to know
http://www.crucial.com/library/guides/desktop/page03.asp
How much memory should you add?
http://www.crucial.com/library/guides/desktop/page04.asp
Donate Hardware
Find nonprofit and school-based recyclers, which are ideal for donating working equipment less than five years old, and commercial recyclers, which are more appropriate for older or non-working equipment.
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