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HDMI to PC wont display right except in 1024x786

Last response: in Graphics & Displays
January 17, 2011 3:42:49 PM

My hdtv is only 720p or 1080i it displays vga at 1360x786 perfectly but when i switch to hdmi it wont work right only in 1024x786??? wtf why and to top it off i ordered a Onkyo HT-S5300 for surround to complete my theater experience. I believe ill be able to run the sound the the hdmi only and keep video on vga but id like to be able to run it with one cable but will do it the other if necessary.

AMD Athlon II X4 630 (3.36GHz)

ASRock M3A785GXH/ 128'
Kingston KVR1333D3N9K2/4G DDR3-1333 4GB (2x2GB)

Graphics Card
Crossfire HD5750s

Hard Drive
WD Caviar Black WD1501FASS 1.5TB 7200 64MB Cache Sound Card
HD onboard

Power Supply
tx 750watt corsair

APEX Vortex 3620 M-ATX

CPU cooling
Arctic Pro 64 GPU cooling

Windows 7 Ultimate 64bit Monitor
32IN HDTV 1080P/50in HDtv 1080i
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a b U Graphics card
January 18, 2011 10:08:25 AM

PC's display in progressive typically, mainly because monitors display in progressive too.

HDTV's have less HDMI handshaking standards than PC monitors do because the manufacturers know that the main devices connecting to the HDMI inputs will be other devices limited to 1080, 720 etc while PC monitors must accommodate for 480, 720, 768, 900, 1050, 1080 right up to it's native resolution.

So when you connect your PC to your HDTV, the HDTV will display at the best resolution it is capable of, 768P, since the PC will not like 1080i as it is not a standard the PC is used to.

The VGA connection may support better handshaking methods as it is usually a dedicated PC connection, which may explain the better resolution.

If you have an Amp to run the HDMI connection through firstly, see if it will upscale to 1080i for your TV.

January 18, 2011 6:32:46 PM

i dont have a amp but when i get my htib that might work i hope.