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- Path: news.vol.it!news
- From: bizzetti@mbox.vol.it (Fabio Bizzetti)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Processors
- Date: 21 Mar 1996 04:06:49 GMT
- Organization: Video On Line
- Distribution: world
- Message-ID: <2334.6654T183T826@mbox.vol.it>
- References: <1880.6651T550T1538@darwin.topend.com.au> <4ikc9l$t08@nadine.teleport.com>
- <1424.6652T807T2165@darwin.topend.com.au> <4ios8j$gtb@brachio.zrz.TU-Berlin.DE>
- NNTP-Posting-Host: molcl3.vol.it
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP)
-
-
- >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.
-
-
- It has no importance (about overall CPU speed) if a 66Mhz DX2 has a 33Mhz bus
- rather than 66Mhz, unless you can find ram fast enough. No realistic way.
- L2 cache can be useful in a PC, perhaps more for the 64K addressing space of
- segmented memory than for any other reason, but I strongly doubt that a
- 200Mhz Pentium has a 200Mhz bus..
-
- ------------------------------------------------------------------------------
- | |
- | Stop that fucking imperialist embargo against Cuba. |
- | Hasta Siempre Comandante Che Guevara. |
- | |
- | |
- | Fabio "Maverick" Bizzetti - bizzetti@mbox.vol.it - Maverick* at IRC |
- | The maker of "CyberMan" and "Virtual Karting" |
- | working on "Virtual Rally" and "StarFighter", the 3D game that will |
- | bring the Amiga to the top |
- | |
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