home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!ut-emx!tivoli!TIVOLI.COM!stuart
- From: stuart@TIVOLI.COM (Stuart Jarriel)
- Newsgroups: comp.sys.hp
- Subject: Re: Graphics accelerator slow ?
- Message-ID: <7157@tivoli.UUCP>
- Date: 21 Dec 92 23:46:00 GMT
- References: <1992Dec17.133718.50045@ccvax.ucd.ie>
- Sender: news@tivoli.UUCP
- Organization: Tivoli Systems, Inc
- Lines: 24
-
- In article <1992Dec17.133718.50045@ccvax.ucd.ie>, njconway@ccvax.ucd.ie writes:
- |>
- |> Weird problem:
- |>
- |> we have 3 9k400's - two of them have been upgraded to 68040's along with a
- |> 98705 graphics 'accelerator' - i think this box is Personal PRX P1 or something
- |> like that.
- |>
- |> the other 400 is just a 68030 with the standard graphics card A1416A (written
- |> on back)
- |>
- |> now the weird bit - i've been starting to use them heavily again (after using
- |> a 700 for ages) and noticed that the two 'fast' 400's take ages to update the
- |> screen compared to the 'slow' one.
- |>
- |
-
- The PVRX accellerator's are pretty good for 3d shaded images, but for normal
- X work (including but not limited to getimage/putimage) they are slow compared
- to an 'unaccelerated' board. This is partially due to the speed at which the
- CPUcan write into the frame buffers. Unfortunately, if you are not doing
- 3d type work, or solids, the PVRX is just going to feel slow.
-
- stuart
-