I took it all to the supermarket before assembly and weighed it on the digital fresh veg scales, got some very weird looks
Here are the results
Standard Asus v8200 GF3 Deluxe 215 grams
Bare card, (no GPU heatsink fan or ram sinks) 155 grams
GPU block with barbs 190 grams
RAM block with barbs 280 grams
Total water-cooled card weight (dry) 625 grams.
So by the time coolant is added and the block retaining screws it will be almost 3X the weight of a standard Asus card...
Once fixed into the PC it doesn't appear to be a problem PCB's are pretty strong. i may make a support for it but the "L" shaped ram block does help brace the card.
New cooler Temps are a bit better, and my homemade GPU block beats the Danger Den one too, which is pleasing
Windows apps temp @ 250/570 coolant at 14°C
Gaming temps also 250/570 with coolant at 14°C, (running the Aquarium D3D screen saver for an hour).