I've had this X800 XT in the GPU bin for a while without using it until recently. Other than a noisy fan it works great but only through VGA. No matter what this thing refuses display out through DVI and I'm scratching my head over what's preventing it from switching.
Can you show us a detailed picture of the backside of the card, preferably from the DVI connector area?
I encountered similar issue on the FX5500.
DVI worked fine on older monitor with CCFL backlight, but it refused to work with modern monitor via DVI-HDMI adapter.
tehsiggi wrote on Yesterday, 13:31:Can you show us a detailed picture of the backside of the card, preferably from the DVI connector area?
Sure thing.
ott wrote on Yesterday, 13:34:I encountered similar issue on the FX5500.
DVI worked fine on older monitor with CCFL backlight, but it refused to work with modern monitor via DVI-HDMI adapter.
This is on a 2004 NEC LCD so compatibility isn't an issue.
If you are using a DVI-D cable I would suggest trying a DVI-I cable instead or try a passive DVI to vga connector just to see if the port works.
You are missing a component at B22.
Yep, B22 is missing entirely, meaning that the GPU is not getting VDDC_CT which powers parts of the GPUs I/O section. It might be the reason your DVI interface is not working at all.
For testing, you might just bridge B22 with a piece of wire and see if things work then. After that you can look for a replacement.
Thanks guys bridging that area with some wire brought the DVI port back to life! What's the correct part I need for that area?
Nonstopmaximum wrote on Today, 10:37:Thanks guys bridging that area with some wire brought the DVI port back to life! What's the correct part I need for that area?
If you can’t find a ferrite bead (which is what you’ll be advised to use) or a 0-ohm SMD resistor, it’s actually quite simple to make a neat one yourself.
Tap the tinned wire (for example, 0.32 mm CAT5 Ethernet cable) three or four times with a hammer, then cut it with a craft knife.
It will be fairly inconspicuous and won’t stand out.
This sort of decision is typical over-engineering from ATI, who did everything exactly by the book.
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You'll need a ferrite bead with an impedance of 60Ohms at 100MHz. Size of 1206 should fit very well. Current rating around half an amp should fit (the R300 specs VDDC_CT at 450mA, wouldn't expect it to be higher for the R400 series).
Something like this https://www.mouser.de/ProductDetail/Vishay-Da … OBDFwQ5Og%3D%3D
