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INI File | 1996-08-05 | 1.5 KB | 35 lines |
- [Newsgroups trimmed]
-
- On Sun, 14 Jan 1996, Wells Fargo Bank wrote:
- [...]
- > Also, keep in mind that a 486DX2-66 is only being accessed from the Mother
- > Board at 33MHz... Still within the 70ns range. Same with 486DX4-100, but
- > its only 25MHz in this case. A 486DX4-120 is 30MHz and so on. The only
-
- Nooo! The DX4 is only clock-tripled. The 4 supposedly stands for "4th
- generation". So the DX4-120 has a 40 MHz motherboard. Don't about the
- local bus though; I thought PCI only goes up to 33 MHz.
-
- > possible exception I am aware of is the AMD (I believe) 486DX2-80 which
- > would access at 40MHz and would seemingly be able to take advantage of
- > 60ns RAM. Obviously, I am not aware of how this compares in the Pentium
- > realm, but I still only see systems selling with 70ns RAM with an
- > occasional 60ns, again, is it taking advantage of the faster RAM?
-
- Considering most PC systems have a substantial L2 cache (256K) and the
- CPU cache on the 486/586 is supposed to get about a 90% hit-rate on it's
- own, I think the main memory speed won't make too much difference.
-
- > Basically, it appears that the Amiga has the ability to access RAM faster
- > IF a faster CPU is being used than the typical PC does.
-
- Yes, but it has to do it more often thanks to the lack of L2 cache.
-
- Ben.
-
- --
- Ben Hutchings, student. Finger me on worc0223@sable.ox.ac.uk for more rubbish.
- email: benjamin.hutchings@worc.ox.ac.uk WWW: http://sable.ox.ac.uk/~worc0223
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