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Several questions:  1.4ghz proc, 133mhz, and 512 cache?  What does that mean?

Posted on 2009-02-17
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Hi experts, I am trying to learn exactly what this means.  I know what the 1.4 is but the 133 and 512..  
1. Is 133 the speed of the bus?  
2. Does that also correlate with what speed the ram has to be to match the processor?  I think I 3. understand but just making sure.  So if you have 100mhz ram then it will not be able to communicate with the proc because its at a different speed?

4. If I am right there (not sure), then why does my 133mhz ram thats older not work with a newer server even tho it is the same speed?

5. How much  does the 133mhz effect the speed of the server itself?  If you have a 2.0 ghz proc at 133mhz speed vs a 1.4 at 100mhz (just for example) which server would be faster?

6. What are server speeds today?  I am working with old but not real old server I guess.

Last of all what is the 512 for?  How does that effect performance?  Thanks.
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Question by:Sp0cky
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MPCP-Brian earned 1200 total points
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1. Yes, 133mhz is the speed of the bus.

2. Yes and no (Read #3).

3. The memory speed is best when matched to the bus speed of the processor, but they still be able to communicate. They will just communicate at the lowest speed present (100mhz).

4. There are many different types of memory. It may not work on the server for any number of reasons. Among those being ECC. You cannot match Non-ECC memory with ECC memory. Some memory needs to be installed in pairs as well.

5. The Bus speed does make a difference. It is hard to measure it, however you would be able to notice the difference. It is like working with a funnel. The processor spits out 2 pages a minute, but it can only communicate back and forth with the RAM at 1 page per minute. You can see how that would hinder the full potential of the processor.

6. Server speeds have greatly increased. Now there are multiple processors (Over 3.0 ghz) that run with bus speeds of 800mhz - 1600mhz+

7. The 512 is the amount of level 2 cache. Level 2 cache is like RAM, but much higher speed and stored within the processor. This makes a noticable difference in speed as well. Celeron processors are a good example. They are cheaper and have half the level 2 cache, this allows them to be marketed cheaply and with 'high processor speeds', but are considerablely slower than an identical machine with a processor with the same rating (1.8 ghz) but more level 2 cache.
Hope this helps! Let me know if you would like more explaination!
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by:Sp0cky
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Thanks!
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