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- Newsgroups: comp.os.os2.misc
- Subject: Help! 8->16MB slows down video!!
- Message-ID: <1993Jan20.150806.24120@lugb.latrobe.edu.au>
- From: DEMOGRB@LUST.LATROBE.EDU.AU (Max!)
- Date: Wed, 20 Jan 1993 15:08:06 GMT
- Sender: news@lugb.latrobe.edu.au (USENET News System)
- Organization: La Trobe University
- X-News-Reader: VMS NEWS 1.24
- Lines: 50
-
-
- I just purchased 4 4MB SIMMS to upgrade my machine (486 ISA) to 16MB from
- 8MB. Having done that, the machine itself seems to be snappier, and
- almost never swaps, *but* ... the video performance under PM has slowed down!!!
-
- I thought I was imagining it, so I used PM-Bench, changing _only_ the memory
- from 8 to 16 MB. Here are the results:
-
- Test With 8MB (ms) With 16MB (ms)
- ------------------------------------------------------
- Pulldown 50.94 129.69
- Dialog 315.60 725.00
- Banding 3.75 12.50
- Scroll (BA) 25.00 36.56
- Scroll (!BA) 32.50 49.69
- Erase 37.50 44.38
- Poly Area (Alt) 106.30 287.50
- (Wind) 178.10 421.90
- Lines - Horiz 0.62 0.94
- Vert 0.94 3.44
- Diag 2.81 6.56
- Long Lines 0.89 2.47
-
- These are only some of the tests, but it is obvious that speed has halved !!!
- I can actually see dialog boxes draw themselves, rather than snap on like they
- used to ...
-
- The old (8MB worth) memory is 1MB SIMMS @ 80ns, the new stuff is 4MB SIMMS
- @ 70ns. The CMOS setup allows only to enable or disable the BIOS shadow,
- which has no effect. The same symptoms appear with two different video
- cards. The motherboard is called an ISA-486S, with an Award BIOS v.4.00.
-
- Has anyone experienced this before? I called the supplier, and they drew a
- blank, so I thought I would tap the resources of the net ... The only thing
- I could think of is something to do with the memory interleave, but I can't
- change anything in the cmos setup ... and FWIW, DOS+Windoze runs normal.
-
- I have tried all the obvious things (and some not so obvious) - any suggestions
- PLEASE !
-
- Thanks in advance,
- /\/\ax!
-
- +---------------------------------+----------------------------------------+
- |/\/\ax! Gavin Baker | Tell a man that there are a billion |
- | | stars in the sky, and he will |
- |net: demogrb@lust.latrobe.edu.au | believe you - But - |
- |cis: 100026,270 | Tell him there is wet paint on a bench |
- |bix: gbaker | and he has to touch it to be sure... |
- +---------------------------------+----------------------------------------+
-