If anyone is having a hard time finding the 5670 powercolor fanless there is now a Sapphire card that is cheaper.
SAPPHIRE Ultimate 100289UL Radeon HD 5670
It's only $10 cheaper for me than the Powercolor AX5670 1GBD5-NS3H but it's nice to have another option.
on the topic of 5750 cards GIGABYTE GV-R575SL-1GI Silent-Cell is now available in the US (and presumably elsewhere).
Keep in mind both the Gigabyte Silent Cell 5750/5770 and Sapphire Ultimate 5670 have heat sinks that extend over the top of the card meaning smaller cases might not be compatible.
Another drawback to the 5750 silentcell is that it has one VGA connector instead of a display port connector that is common on more expensive 5750 cards. As in 5750 Silent-Cell has 1 DVI, 1 HDMI, 1 VGA but the Powercolor 5750 has 2 DVI, 1 HDMI, 1 DisplayPort. But if you can put up with the loss of port(s) and the oversized heatsink it's cheaper.
prices shipped to my home
Sapphire 5670 ultimate (fanless) $125
Powercolor 5670 Go Green (fanless) $135
GIGABYTE 5750 Silent-Cell (fanless) $135
Powercolor 5750 SCS3 (fanless) $155
Powercolor 5750 Go Green (fanless) $195 (note this one does not require 6 pin power connector as it uses less power than other 5750 cards)
GIGABYTE 5770 Silent-Cell (fanless) $165 (this one unlike the 5750 has DisplayPort and does not have VGA).
It makes it a tough sell to go fanless and not spring the extra couple of bucks to step up from the 5670 to the 5750 assuming you can afford to house a 2 or 3 slot card and aren't limited by height issues.
It also makes the GoGreen cards a tough sell on price at the 5750 level knowing how many other 5750/5770 cards are cheaper.
Just found a head to head review between the 5750 go green and the 5750 silent cell at http://www.hardwareheaven.com/reviews/1 ... cking.html
short version is if you have some ram sinks laying around the Silent Cell is a winner. The Go Green has ram sinks preinstalled but is more expensive. And of course there is the size and video connectors to think of.