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Memory Timings - Page 2

post #11 of 17
That's it!
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post #12 of 17
Thread Starter 
Ok one last question. What exactly is CMOS and what does clearing it actually do? From what I know and this could be very wrong the CMOS is where the settings for the BIOS are stored and by clearing it it returns the BIOS to its default settings. Is this right?
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post #13 of 17
yes, when you reset the jumpers on the mobo or remove teh battery it resets everything(bios).
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post #14 of 17
The BIOS and CMOS are 2 spearate things.

BIOS contains the instructions that allow all the components to talk to themselves on a basic level in order to boot up.

CMOS contains the stuff you can fiddle with, like boot order.
post #15 of 17
Thread Starter 
Thanks for all your help guys. One final question though. What would be good timings for my system?
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post #16 of 17
guiz what does the timings actualy do??what do i win if i have tight timings??and otherwise??
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post #17 of 17
Quote:
Originally Posted by eXtr3m3 View Post
guiz what does the timings actualy do??what do i win if i have tight timings??and otherwise??
The value of a timing is the number of clock cycles given to it for it to perform its function. Each timing in the CMOS performs a different function, the cumulative effect being finding the correct data and placing it in the 'post out' tray, or taking data from the 'post in' tray and storing it correctly. Some functions take longer to complete than others, hence some timings having more clock cycles than others. *

But, if the timing has more clock cycles than it needs, then some time is spent doing nothing. Tightening timings allows this unused time to be used, lowering latency - information can be found quicker (increasing bandwidth [done simply by increasing memory clock] allows this data to be transferred faster once found).

* Timings actually need a period of time to perform their function, rather than a fixed number of clock cycles. At 200MHz, 1 clock cycle is 5 nanoseconds. As memory speed goes up, the time 1 clock cycle takes falls. As timings need a fixed amount of time rather than clocks, you will need to increase the number of clocks available to some of the timings so they have enough time. [This is my understanding of it, and may be wrong, but it explains timings very well]
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