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Old 04-27-10, 10:56 AM   #19
primerib
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Join Date: Dec 2008
Posts: 128
Default Re: VDPAU - 8400 GS - Which one?

Quote:
Originally Posted by roger1818 View Post
I am looking for a card with the G98 chip. Apparently a 8400 can have either a G86 or G98 chip, but only the G98 has full hardware VC-1 and MPEG2 video decoding. It also has lower power consumption, dual-link DVI support and PCIe 2.0 support.

I wrote to MSI and they said the NX8400GS-TD512EH "has 8 Stream Processors. PCIE v1.1. G86 chip."
Whoever replied to your query from MSI should've checked their resources better. The NX8400GS-TD512EH is a G98 chip as I own it and know first-hand.

One easy way to tell if the 8400GS card you're considering is G98 is if the core clock speed is higher then 450Mhz. In the case of both the MSI NX8400GS-TD512EH and the ASUS EN8400GS SILENT/HTP/512M, the core clock speed in 567Mhz.

Here are the test results from each:

ASUS EN8400GS SILENT/HTP/512M
Quote:
NVIDIA GPU GeForce 8400 GS (G98) at PCI:2:0:0 (GPU-0)

VDPAU API version : 0
VDPAU implementation : NVIDIA VDPAU Driver Shared Library 185.18.14 Wed May 27 03:09:54 PDT 2009

SURFACE GET BITS: 816.322 M/s
SURFACE PUT BITS: 399.988 M/s

MPEG DECODING (1920x1080): 75 frames/s
MPEG DECODING (1280x720): 171 frames/s
H264 DECODING (1920x1080): 66 frames/s
H264 DECODING (1280x720): 130 frames/s
VC1 DECODING (1440x1080): 81 frames/s

MIXER WEAVE (1920x1080): 239 frames/s
MIXER BOB (1920x1080): 357 fields/s
MIXER TEMPORAL (1920x1080): 71 fields/s
MIXER TEMPORAL + SKIP_CHROMA (1920x1080): 99 fields/s
MIXER TEMPORAL_SPATIAL (1920x1080): 24 fields/s
MIXER TEMPORAL_SPATIAL + SKIP_CHROMA (1920x1080): 26 fields/s

MIXER TEMPORAL_SPATIAL (720x576 video to 1920x1080 display): 95 fields/s
MSI NX8400GS-TD512EH
Quote:
NVIDIA GPU GeForce 8400 GS (G98) at PCI:2:0:0 (GPU-0)

VDPAU API version : 0
VDPAU implementation : NVIDIA VDPAU Driver Shared Library 185.18.14 Wed May 27 03:09:54 PDT 2009

SURFACE GET BITS: 820.215 M/s
SURFACE PUT BITS: 401.124 M/s

MPEG DECODING (1920x1080): 76 frames/s
MPEG DECODING (1280x720): 171 frames/s
H264 DECODING (1920x1080): 66 frames/s
H264 DECODING (1280x720): 133 frames/s
VC1 DECODING (1440x1080): 83 frames/s

MIXER WEAVE (1920x1080): 240 frames/s
MIXER BOB (1920x1080): 360 fields/s
MIXER TEMPORAL (1920x1080): 72 fields/s
MIXER TEMPORAL + SKIP_CHROMA (1920x1080): 100 fields/s
MIXER TEMPORAL_SPATIAL (1920x1080): 24 fields/s
MIXER TEMPORAL_SPATIAL + SKIP_CHROMA (1920x1080): 26 fields/s

MIXER TEMPORAL_SPATIAL (720x576 video to 1920x1080 display): 96 fields/s
Another thing I'ld like to note is BOTH of these cards have an SPDIF IN header. While this is easily accessible on the Asus card, I had to remove the heatsink on the MSI to plug in the cable. I'll also mention that neither company advertised this feature, or could confirm the cards even have it. I took a chance since I got both cards dirt cheap. Figure if it walks, talks, and looks like an SPDIF IN -- it probably is. And I was right.
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