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What is the difference between 2-clock and 4-clock memory? Two types of SDRAM modules are the 2-clock and the 4-clock module. Structurally, they are the same, but they are accessed differently. A 2-clock SDRAM module is set up so that each clock cycle accesses two chips on the module. A 4-clock SDRAM setup accesses 4 chips per clock cycle. To choose what kind to get, you must look into the motherboard''s documentation. 4-clock modules are the more commonly used. The typical indication of the wrong type being used is a system giving error beeps and not booting as it cannot use the memory installed. The system will not proceed past POST (Power On Self Test). 2-clock was only used in 66 MHz systems. All PC 100 and PC 133 memory is 4-clock only. Do all of your SDRAM modules use SPD? SPD, or Serial Presence Detect, is a program in an EEPROM chip on the modules of SDRAM (Synchronous Dynamic Random Access Memory). It tells the system’s BIOS what the specifications and settings of the memory module are. All of our SDRAM DIMMs have SPD programming. The system BIOS should therefore be set on AutoDetection for memory.

MEMORY BASICS One of the best ways to increase the performance of your computer system is by adding more memory. With additional memory, you can have more programs running at the same time, and work on larger business files like spreadsheets and databases. Easily installed, RAM chips can speed up graphics applications, multimedia and, especially, games. HOW IT WORKS Before information can be processed by a computer, it must first be transferred to a special data storage area called RAM (Random Access Memory). RAM is connected directly to the processor externalharddrives by high speed externalharddrives data pathways. As long as your data is in RAM, the computer''s processor has almost instantaneous access to it. When the processor needs information that is not currently in RAM, it must be loaded from the hard drive and placed in RAM, a much slower process. So the more RAM you have, the higher your system''s overall performance.

4 All Memory.Com externalharddrives warrants that all products are free from defective material and workmanship and, subject to the conditions set forth below, agrees to repair or replace any part of a product that proves defective by reason of improper workmanship or materials without charge for parts and labor. Memory Lifetime free replacement of defective modules with 4AllMemory.com. 30-Day money back on all memory products. No credit or refund after 30 days. Customer agrees to assume shipping charges on return shipments to 4 All Memory and 4 All Memory agrees to assume shipping charges externalharddrives back to customer. Lifetime is defined as the lifetime of the product on the market. Outdated technology is not covered by lifetime warranty if the item is no longer available on the common market as a new product.

externalharddrives

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