dual 867 vs new dual 1 ghz - bus speed..
August 21, 2002 8:59AM
Current Mac Hardware
edited January 2014
Does the bus speed make that much difference?
Will it affect performance greatly?
Reply 1 of 3
August 21, 2002 12:07PM
well... metaphorically attempted (UK version),
auto driving on say... wider roads
access roads near a school (home at certain times to zebra-crossings full of children, speed bumps, and other pickup/dropoff parental traffic)
dual carriageway up to any motorway other than the M1, M10, or M45 (home at certain times to blind corners, lorries losing load, caravans of confused tourists weaving behind maps as they search for exits, and the odd cosworth or aston martin hooting to pass)
multi-lane motorway of M1 or similar class (home on the worst days or near congested exits to the same speeds as 1 or 2, but generally available for heavyfoot hurtling forward until the lights in front or the rotating red/blue behind force you to tone it down)
banked corner racetrack or hypothetical uber-autobahn (perfect road surface, zero idiot traffic, psychic rally navigator to predict which lane is open well in advance)
1* might be any bottlenecked high i/o bus
2* untweaked current single processor bus
3* tweaked single or untweaked dual(in 9)
4* tweaked dual in Jag
each new increase in bus speed is a bit like improving the road (wider, smoother, smarter curves and traffic i/o points, higher speed limit)
so logically a faster bus is like road improvement.
remember, we started presuming an
tripling the speed limit on the road won't help if you're still in a yugo. but with real roads under you, once you get some real horsepower under the hood, the possible becomes
any car (cpu) should in principle do better with less traffic or pavement friction
nitpicking of this hasty metaphor may now commence
Reply 2 of 3
August 21, 2002 3:39PM
AHH! ANOTHER CAR METAPHOR
There should see a noticeable difference between the dual 867 and the dual 1GHz not because the dual 1GHz has a faster bus, but because the dual 1GHz also has 267 more MHz.
Reply 3 of 3
August 21, 2002 4:12PM
[quote]Originally posted by Son of Pismo:
<strong>AHH! ANOTHER CAR METAPHOR
There should see a noticeable difference between the dual 867 and the dual 1GHz not because the dual 1GHz has a faster bus, but because the dual 1GHz also has 267 more MHz.</strong><hr></blockquote>
technically, it was a
we could've tried heathrow as the cpu and system board... lots of i/o. a dual processor would be like stacking another airport into the same (multi-dimensional) space, but you'll
see an increase in performance if you widen the access roads and pump up the speed on the peoplemovingwalkwaythings and carousels.
wider neck bottles let you pour lager faster
two straws will draw faster than one,
but two wider straws will also draw faster than either previous option.
you may not notice the difference as much in all apps (certainly not the non-multithreaded ones) if we're only talking about single-vs-dual, but with more efficient feeding of whatever CPU as a result of the improved bus, the data will get to where the crunching occurs more efficiently.
[ 08-21-2002: Message edited by: curiousuburb ]</p>