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- Path: lyra.zrz.TU-Berlin.DE!rawneiha
- From: rawneiha@lyra.zrz.TU-Berlin.DE (Philipp Boerker)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Processors
- Date: 20 Mar 1996 12:04:35 GMT
- Organization: Technical University Berlin, Germany
- Message-ID: <4ios8j$gtb@brachio.zrz.TU-Berlin.DE>
- References: <1880.6651T550T1538@darwin.topend.com.au> <4ikc9l$t08@nadine.teleport.com> <1424.6652T807T2165@darwin.topend.com.au>
- NNTP-Posting-Host: lyra.zrz.tu-berlin.de
-
- envision@darwin.topend.com.au (travis) writes:
-
-
- >Here are the very sad results using the same scene,antialiasing etc.
-
- > DX2/66 8Mb RAM , cheap video accel etc.................28 mins 1 sec.
-
-
- >My A4000/040/40Mhz 28Mb on Warp 4Mb on mboard all 60nS....52 mins 1 sec.
-
- >That's a very big difference considering the DX2/66's clock speed is
- >considerably slower than the Warp Engine. ie 66Mhz compared to 80 Mhz.
- ^^^^^^^^^^^^^^^^^^^^^^^^
- Wrong! It is a marketing legend that the 040 doubles the clockfrequency!
- Some 040 instructions take X.5 cycles that's why it needs a second "clock"
- that is delayed half a cycle!
-
-
- >You must remember that Motorola considers the processor speed to be the bus
- >speed. The 040 actually runs at twice the bus speed.
-
- The i486 DX2/66 has a bus clock of 33 MHz (that's where the "DX2" comes
- from!), the usually non-L2-cached 040 has a bus of about 16 MHz (60 ns RAM
- assumed). Compare apples to apples!
-
- >Travis.
-
- Greets,
- Phil.
-