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Some noob questions.

post #1 of 9
Thread Starter 
Forgive my noobness

1. What is a "Cache" -example E6600 4mb cache (what is the use of it?)
2. The CPUs that are out now are rated 65nm (i think). I know from physics nm = nanometers. What is this measuring? Also, i hear that next generation CPUs will be 45nm (i think)
3. What are dies?

Thanks.
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post #2 of 9
Cache is like super fast memory on die-More the better
    
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post #3 of 9
The new gen of CPUs are 45nm and going to be even smaller in the future!-The new Penryn is going to be 45nm
    
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post #4 of 9
cache is super fast memory that is stored within the CPU. The Die is essentially the core of the processor. and the 65 and 45nm you keep seeing is the size of the die, the smaller the die, the faster the processor.
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post #5 of 9
Quote:
Originally Posted by Oblivion77 View Post
1. What is a "Cache" -example E6600 4mb cache (what is the use of it?)
It is a form of temporary memory that stores information fetched from main system memory before it is executed by the CPU. This is because most CPU's execute data faster than it can be fetched from the RAM. Cache works as a buffer so that a processor doesn't have to wait for data to be fetched from RAM before it can be processed.

Quote:
Originally Posted by Oblivion77 View Post
I know from physics nm = nanometers.
Nano-Microns, they're much smaller than Nano-Metres. This relates to the scale of the transistors and components inside the CPU itself.

Quote:
Originally Posted by Oblivion77 View Post
3. What are dies?
You could think of a processor die as the area in which the components of the processor are placed.
post #6 of 9
quote Cache is like super fast memory on die-More the better

Maybe More is better on intel based systems, but amd systems dont rely on the l1-l2 cache as much as intel does, due to different architecture.
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post #7 of 9
Quote:
Originally Posted by Oblivion77 View Post
Forgive my noobness

1. What is a "Cache" -example E6600 4mb cache (what is the use of it?)
2. The CPUs that are out now are rated 65nm (i think). I know from physics nm = nanometers. What is this measuring? Also, i hear that next generation CPUs will be 45nm (i think)
3. What are dies?

Thanks.
1. Cache is memory that physically sits on the chip(cpu). Its physical closeness and makeup make for memory that is blazing fast in comparison to the system memory that you install on the motherboard. Its generally used for instruction sets and frequently accessed code that the processor uses. When I say blazing fast I mean like 100 times faster or more. L1 is physically super close to the core. L2 is still on the core but not as close as L1. L2 used to reside on the motherboard but no longer does. Hence the name level 1 cache and level 2 cache commonly referred to as L1 and L2 respectively. I dont remember which but on some intel stuff you may have seen L3 cache even. Which generally amounts to no performance difference from what I hear.

2. The nm reading (I think) is either the space between the transistors on the chip or the size of the transistors themselves. I think its the space between. Really this value getting smaller ultimately means more transistors per chip resulting in faster processors.

3. The die is the chip itself. Its not the entire cpu chip but the core itself. See my paint skill-bilites for details.
    
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post #8 of 9
Quote:
Originally Posted by Oblivion77 View Post
Forgive my noobness

1. What is a "Cache" -example E6600 4mb cache (what is the use of it?)
2. The CPUs that are out now are rated 65nm (i think). I know from physics nm = nanometers. What is this measuring? Also, i hear that next generation CPUs will be 45nm (i think)
3. What are dies?

Thanks.
1. Cache is the first stage of execution on your processor. Your data starts out on the large capacity, but relatively slow hard drive and then moves to the faster (but smaller) DDR2 memory. From the DDR2 memory it goes to the L2 cache which is once again smaller, but also much faster. From there it goes to the L1 cache which is even faster but again smaller.

Just think about it as increased speed and decreased capacity.

2. This value is the distance between the transistors on the processors. Core 2 Quads have over 400 millions transistors. The smaller this gap the less voltage leak (that means less power consumption and less heat). The smaller gap means more transistors can fit in the same place, which gives you a faster processors. Finally, more transistors can manufactured for less, which means the price of processors decreases.

3. The die is the core of the processor where all the transistors lay.
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post #9 of 9
Ok guys I think the questions have been answered enough times now...

Got any other questions?
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