I've been running a MSi N210-MD512D3H/LP for a year now, and need to get a better GPU. I'm considering the MSi N610GT-MD2GD3/LP as an upgrade. Both Cards 'demand' a 300w PSU but I've been running the 210 on a LiteOn PS-5221-06 220w supply. The system has been running fairly stable since I plugged the 210 in, the only problem being a heat problem due to the case I have.
Can I run the N610 with this PSU?
Intel Core Due E7400
LiteOn PS-5221-06 220w
Acer Aspire X3810 case
I would definitely not run the new card on the old power supply. It is definitely going to be more demanding of power than the old card. You can try it, of course. Either the system will run or it won't.