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CPU's - Computing Power UnleashedCPU speed has increased rapidly in the past year or so. CPU really stands for central processing unit. This is the main "brain" chip that decodes and executes the commands within the computer system. If you haven't already upgraded yours, you might be considering it. Before you buy, lets brush up on some things you should know. What is cache memory and how can it speed up my CPU? It is a type of ram that is more expensive but much faster than normal ram. Some commands are re-used quite often while your system is operating. A small amount of cache ram is used to hold this frequently accessed data. A considerable increase in speed is achieved by using only a small amount of the costly ram, and allowing the lesser cost DRAM chips handle other data that changes regularly. What is L1, L2, and L3 cache? L1 or Level 1 cache is cache memory that is built into the microprocessor chip. It is also referred to as primary cache. L2 is a secondary cache that has traditionally been external to the microprocessor. It adds another layer of cache to hold even more frequently accessed information. More commonly today it is being added on the same circuit board as the cpu, and a third layer (yes, they have dubbed it L3) now takes its old place on the motherboard between the cpu and the main memory.To compare cache and bus speeds, stop by webopedia.com/quick_ref/processor.html. What is a flipchip? This is a type of cpu design where the chip itself is "flipped" and attached to the circuit board with small balls of solder. The chip makes direct contact with the heat sink, which permits better cooling, which in turn allows it to run at higher speeds. By now you're saying enough about terminology.. what about the chips themselves? Ok, here is a quick comparison of the current production CPU's. Intel's Pentium 4 is the new kid by the old school company. The P4 motherboard requires Rambus ram (also called Rdram) that runs at PC800 speed. The ram must be installed in pairs. It also requires an Intel certified power supply for your warranty to be valid. These are 300 watt, and as you expected, cost quite a bit more than a standard case and power supply. Available in speeds of 1.3, 1.4 and 1.5 gigahertz, this is currently the fastest chip available on the retail user market. Celeron, also by Intel, is a scaled-down version of the Pentium series. It merges speed and reliability with affordability. Celeron chips are now available up to 800 mhz. One of the hottest chips on the market right now is the Athlon Thunderbird, by AMD. It is pure power combined with compatibility. These chips boast the same L2 cache as the P4's, but can use the more common and affordable DIMM ram. Speeds up to 1.3 gigahertz are currently available. Duron, plain and simple, is speed for less money. Slower than the Athlon due to less cache, the Duron is a workhorse cpu. Current speeds top out at 900 mhz. Cheaper than buying a new system in most cases, these are great for upgrading an older unit without breaking your piggy bank.Most CPU's are available in both an OEM and retail box version. Although the product itself is the same, the warranty differs greatly. Retail box chips will normally carry a 3 year warranty from the manufacturer. OEM warranties can vary from none at all to 3 years, so make sure you ask before you buy.You'll also need to buy a motherboard that is compatible with the CPU have you chosen. Athlon chips will not fit into Pentium 3 motherboards, and Pentium 4's will not fit into Celeron sockets, and so on. So you thought this decision was going to be easy? If you still have questions, ask a professional to help you. There's never been a better time to increase the speed of your system at such reasonable prices. |
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