as above ,for a low power,low profile build this card cant really be faulted - I myself have the 1gb version as imo even for £5 extra an extra 1gb of memory on a low power card such as this make little to no difference at all.
It goes into sleep/hibernate mode perfectly on my windows 7 64 bit setup - Ive paired this with a llano a6-3870k processor (undervolted & overclocked to 3ghz ),an asrock a75m board ,4gb of 1600ddr3,a kworld usb dual dvb-t tuner & a novatech htpc low profile case with a 250w psu - I couldnt ask for more,cool quiet,into & out of standby for tv recordings absolutely fine & will even play black ops 2 at 40fps & hitman absolution at 50fps at 720p medium settings.
Dual graphics with a llano or trinity apu is a pain to setup properly - I have previous experience of this though so knew how to do it
As a rule of point if you have dual graphics enabled but are still using the onboard motherboard video outputs then its not setup correctly - when done properly the onboard outputs should give no signal & you should have to use the outputs on the hd5670 card itself - If not setup correctly it can impact performance from the card & youll get worse results than without it.
It will NOT play any recent games at max settings at reaonable framerates irregardless of what others say - thats why its a £50 card - if it could do this then there would be no need for high powered £150-£300 cards at all.
I get playable framerates (40-50fps) at medium settings when crossfired with a fusion apu which makes it approx 15-20% more powerful ,so expect 30-40fps tops on a standard decent speed dual/quad core cpu
Its not a gaming card by any means - if you want better performance jump up to the hd 6670 ddr5 (itll give you 30-40% better performance for a tenner or so more) - I was governed by size/power/temperature constraints though so this card is perfect for what I wanted - a low power htpc build that is capable of gaming at 720p on medium settings.