Getting three analog VGA outputs may be a challenge. Have you considered a monitor upgrade?
Cheap 27" 1080p TN LCD monitor with DVI input:http://www.logicbuy.com/deals/planar-px ... 23412.aspx
Inexpensive 21½" 1080p e-IPS LCD monitor with DVI & DisplayPort inputs:http://accessories.us.dell.com/sna/prod ... u=320-2736
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We could start with a hot-clocked Radeon HD7850 for $260 +7 shipping
or $275 +7½ shipping
, or you could get a stock-clocked version for $240 + 7½ shipping
and then overclock it yourself if you wanted more performance.
The first analog VGA monitor can be connected to the graphics card's DVI-I port with a simple adapter dongle for $3½ +3 shipping
. Monitor #2 could use HDMI if it had a matching input, but let's leave that one unused (suitable adapters cost $40+). Monitors 3 and 4 must use Mini-DisplayPort.
We can go from Mini-DisplayPort to analog VGA for $22
or $28 +4 shipping
. With multiple monitors of the same resolution attached to the same AMD Radeon graphics card, you can use Eyefinity in most 3D games to have a panoramic 3D gaming experience across all three monitors.
P.S.: If you do upgrade to multiple monitors with DVI-D or HDMI inputs, a simple HDMI<->DVI cable is $8
. A Mini-DisplayPort to DVI active adapter is $29 +2 shipping
or $34 +5 shipping
. If you get monitors with DisplayPort inputs, a Mini-DisplayPort to DisplayPort cable costs only $6
(for a long one).