I now have a X850XT from XpertVision.
http://www.xpertvision.de/v2/index.php?option=com_content&task=view&id=53&Itemid=67
I just want to share my experiences with this card but also
have a few questions.
First of all, the card works great with SNAP 3.1.8 and CRT. I simply
swapped the cards and the new one was detected fine. I only had to
reprogram my custom resolution (1456x1100x32). AGP 8x, fastwrite and
full accel are enabled without any issues so far.
There are only 2 unclear things:
Only 128MB of the 256MB are reported.
Is this related to the fact I set AGP aperture size in
BIOS to 128MB? graphics.log does not report any issues
with VIRTUALADDRESSLIMIT=1536.
The memory clock is reported by gamemclk as:
Memory clock settings for ATI Radeon X850 Series (device 0):
According to the ATI driver on Windows XP it should be at
540 MHz. The GPU core frequency is reported as 520 MHz by
the Windows driver. gamemclk refuses to accept any value.
Further more the maximum frequency does not match the one
written to graphics.log:
Graphics device configuration:
Manufacturer......... ATI
Chipset.............. Radeon X850 Series
Bus Type............. AGP bus
Memory............... 131072 KB
DAC.................. ATI Internal 24 bit DAC
Clock................ ATI Internal Clock
Memory Clock......... 400 MHz
Default Memory Clock. 400 MHz
Maximum Memory Clock. 400 MHz
Driver Revision...... 3.2, Build 29
Driver Build......... Sep 25 2006
Certified Version.... 1.60
Certified Date....... Sep 25 2006
In terms of performance on eCS on my So754 Athlon64 3000+
(VIA K8T800 chipset) I had expected somewhat bigger improvements
compared to the Radeon 9600XT. Only the on-chip operations BitBlt
S->S, Filled Rectangle, Pattern Fill, Vertical Lines and Horizontal
Lines (Sysbench 0.95) show improvements of about 25 percent.
Everything else and also DIVE speed has not changed. Because of
the much faster memory interface I had expected some changes here.
Could this be related to the 400MHz memory clock issue?
The video bus bandwidth is at 1004 MB/sec.
On Windows XP the performance is superior just as expected.
In 3DMark2003 (didn't want to download the huge newer ones) I get
a rating of 11728 (medium quality settings) compared to 4401 on
the 9600XT (reduced quality settings) when running the default
benchmark.
Analog signal quality is the same as on the 9600XT. At 1456x1100
with 85Hz on my 19" CRT the 9.WarpSans font on the desktop is crisp
and not washed out.
OS/2 applications I tested so far are WarpVision with SNAP overlay,
BTTV, SeaMonkey, PMView Pro and several others. In PMView Pro the
jaggies when resizing the selection area are still there. All other
apps work as expected and appear to be a bit more snappier ;) .
Diese Information wurde gesendet von: Heiko Nitzsche -- 2006-12-02 17:41:50
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Kommentare:
Eugene Gorbunoff 2009-05-22 20:27:23
Heiko Nitzsche:
I have a ATI X850XT with 2 CRTs connected running at 2980x1100x32bpp with Sub-D
and even with Sub-D the image quality is similar to my old Matrox G400. But performance has dramatically increased, so don't stuck at the old Matrox!
Even my old ATI 9600XT was several times faster than the G400.
eCo Software is the largest developer of shareware applications on eComStation / IBM OS/2 Warp market.
