Author: stuart taylor
Date: 15:25:31 06/13/00
Go up one level in this thread
On June 13, 2000 at 17:59:03, Tom Kerrigan wrote: >On June 13, 2000 at 17:27:45, Torstein Hall wrote: > >>On June 13, 2000 at 17:01:36, Tom Kerrigan wrote: >> >>>On June 13, 2000 at 15:55:24, Mogens Larsen wrote: >>> >>>>On June 13, 2000 at 15:41:51, Tom Kerrigan wrote: >>>> >>>>>No, Thunderbird is a few % faster than an Athlon at same MHz. >>>>> >>>>>Duron is exactly the same as Tbird, but with 1/4 the L2 cache (64k). >>>>> >>>>>-Tom >>>> >>>>I've just purchased an ordinary Athlon. What are the advantages and >>>>disadvantages with a smaller cache size. BTW, are the L2 cache of the >>>>Thunderbird and the Athlon fullspeed? >>>> >>>>Best wishes... >>>>Mogens >>> >>>The Tbird and Duron both have on-die "full speed" L2 caches, but they are not >>>that much faster than the old off-die caches. Most benchmark scores improve by a >>>few percent, but nothing like when Intel moved the PIII cache on-die. >>> >>>The main benefit of the on-die cache is that it makes the processors much >>>cheaper to manufacture. Another, less significant benefit is that the cache >>>performance can now scale with the processor performance. >>> >>>-Tom >> >>Why was it so much more important for the PIII to get the cach on-die? > >Primarily because the PIII has a small L1 cache--16k or 32k, I can't remember >which. But it relies heavily on the L2 cache, as opposed to the Athlon, which >has a 128k L1 cache. > >Another thing is that Intel redesigned the PIII's L2 cache when they put it >on-die, so the bandwidth is higher and the latencies are lower. AMD simply took >their cache chips and splatted them on the processor die, so there's no reason >for the on-die cache to be much better than the off-die cache. > >-Tom Therefore, is a normal Athlon with 512k L2 off-die cache still better than thunderbirds 256 on-die L2 cache? (if I got the numbers right). And overall is it superior to intel at the momment? S.Taylor
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