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PostPosted: Mon Jan 23, 2006 10:39 am 
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RAM is Random Access Memory. ROM is Read-only memory. L2 cache is a very high-speed memory sector, usually built into the die of the processor, to store instruction sets for programming. Main memory is re-progrmmable, or able to be re-written many times during the session in progress. DDR memory is meant to imply that the dynamic rate of address is double what normally would be set. SDRAM is a common type, where it means that the memory is Synchronous to a bus speed, and Dynamic RAM in its addressing qualifications.

Source: Intel processor specifications, Pentium 4

Memory Type
Random Access Memory (RAM) is fast but temporary data storage space. Each chipset supports one type of memory: SDR SDRAM, DDR SDRAM, or RDRAM. SDR (Single Data Rate) SDRAM and RDRAM (Rambus) are older memory technologies that are no longer supported by current Intel chipsets. DDR (Double Data Rate) SDRAM has two transfers for every one transfer with SDR SDRAM. Dual Channel DDR SDRAM transfers data four times for every one transfer with SDR SDRAM


L2 Cache
The size of 2nd level cache. L2 Cache is ultra-fast memory that buffers information being transferred between the processor and the slower RAM in an attempt to speed these types of transfers.

L3 Cache
The size of 3rd level cache, typically larger then L2. L3 Cache is ultra-fast memory that buffers information being transferred between the processor and the slower RAM in an attempt to speed these types of transfers. Integrated Level 3 cache provides a faster path to large data sets stored in cache on the processor. This results in reduced average memory latency and increased throughput for larger High-end Desktop workloads.


sSpec Number
Also known as specification number. A five character string (SL36W, XL2XL, etc.) that is printed on the processor, and used to identify the processor. By knowing the processor's sSpec Number, you can find out the processor's core speed, cache size and speed, core voltage, maximum operating temperature and so on.


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