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- From: mccall@mksol.dseg.ti.com (fred j mccall 575-3539)
- Subject: Re: DX2 50 vs. DX 50
- Message-ID: <1992Aug18.204148.22919@mksol.dseg.ti.com>
- Organization: Texas Instruments Inc
- References: <54830008@acf3.NYU.EDU>
- Date: Tue, 18 Aug 1992 20:41:48 GMT
- Lines: 49
-
- In <54830008@acf3.NYU.EDU> reznick@acf3.NYU.EDU (Daniel Reznick) writes:
-
- >I would like to knwo the difference between the 486DX2 50MHZ CPU and the
- >486DX 50MHZ CPU. I know that the DX2 is a "clock doubler", and is only
- >50MHZ internally, but what does this mean in practical terms. What is
- >"internal" and "external" operations. If the data bus runs at 8MHZ
- >either way, how is the tru 50 faster?
-
- Keep in mind that the memory doesn't live on that 8 MHz bus. It lives
- on a bus that is running at the speed of the CPU clock (25 MHz for a
- 50DX2, 50 MHz for a 50DX).
-
- >Does the DX2 slow disk access?
-
- I wouldn't think so.
-
- >Video access?
-
- Once again, I wouldn't think so (unless your video card is a Local Bus
- card, in which case it would.
-
- >Would a DX2 50MHZ ISA machine be appropriate for a server
- >of any sort? Thank you.
-
- I would be inclined to run EISA on a server.
-
- >Daniel Reznick
-
- >OH, also, how does DX2 vs. DX and EISA vx. ISA affect multitasking in an
- >envirnotment like Windows?
-
- Only the memory access speed will make a difference for Windows.
- Because Windows is a message-drive system, it is not 'true'
- multitasking. You would be hard pressed to do enough under Windows to
- saturate an ISA bus.
-
- >or the promised Winddows NT or win32?
-
- NT, like OS/2 and UNIX, is a real multitasking OS. If you have a
- server and put intelligent EISA peripherals (disk controller, Ethernet
- boards, etc.) you could conceivably saturate the EISA bus. Data
- throughput will be much higher with EISA or MCA busses.
-
-
- --
- "Insisting on perfect safety is for people who don't have the balls to live
- in the real world." -- Mary Shafer, NASA Ames Dryden
- ------------------------------------------------------------------------------
- Fred.McCall@dseg.ti.com - I don't speak for others and they don't speak for me.
-