PowerMac G5 playing onto 1080p HDTV

I wish to view some 30GB HD QuickTime files on a Samsung HL-R6168W tv - I've connected G5 Dual 1.8Ghz DVI output to tv HDMI input, but get no 'mirrored' display on tv. The same cable/plugging set-up does mirror successfully on tv with MacBook Pro 2GHz (Radeon X1600 video card) as source. Does this mean an upgrade video card for G5 - currently Geforce FX 5200 - and if so what recomendations. Thanks in anticipation.
G5 Dual 1.8GHz Mac OS X (10.3.9)

Hi David,
Can you get "extended desk top" on the TV?
What is the size (res) of your monitor?
I think that the 5200 only has 64 MB VRAM, and/or the
GPU is not powerful enough, and/or the 5200's
bandwidth is too small. 1080P has 2X the bandwidth of
1080i and in general HD has 4-6X the bandwidth of
normal TV. ** Thats a lot of bandwidth!!
The X1600 is a much more powerful card with 256 MB
GDDR3 VRAM.
So my guess is that the 5200 can't cut it, as per
your test.
The best card for your machine is the ATI X800, but
ATI have stopped making them, so you need to find one
soon.
note: you system is PCI-X / AGP, don't get the newer
PCIe (express) cards shipped with the last generation
G5's or the X1900 XT, they won't work or fit
-Robert
Robert
Thanks for your helpful reply. I get no G5 Mac image on TV - just an error message saying "Mode not supported" - not a glimmer of extended desktop. I'm going to try DVI to VGA cable - the tv accepts that kind of input too - and see if that brings an improvement, but I suspect in light of your bandwidth observations, that that too will fail. I'll start searching for ATI X800. I'll keep you posted on developments. My Mac monitor is Apple Cinema HD Display -1920x1200. Tv is 61 inch Samsung DLP.
Regards
David
G5 Dual 1.8GHz Mac OS X (10.3.9)

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