Is it possible to use two smps in a single Cabinets

[arokia]

i'm currently using an ati 4870 card in my system which as got 500watts smps...................now since i newly bought another ati 4870 card which i'm going to use in crossfire in the same system i'll need a total of 600watts smps which would cost me Rs.4000 extra....................so i was wondering if i could use another 350watts smps which costs me only Rs.1500 for the new card along with the existing 500watts smps for the older card and motherboard in the same system.

 

[arokia]

i've got enough cabinet space and my side panel is usually open......

 

[WR2]

It's not impossible.
But it's not a good idea to use a 2nd power supply in a normal PC system. They're just not designed for that type of thing.

You'd be better off using a dedicated graphics power supply that you can mount in a your cabinet like a DVD drive.
Once example is FSP Booster X3
But you might find it less expensive just to buy a replacement power supply.