Core i7 920 @ 4ghz (overclocked to)
6 gb ram
gtx 460 1gb
It plays at full speed with the setting of 3x native resolution with my set, with a bit stronger gpu it would do fine with 4x too.
Latest automated pcsx2 revision builds: (remove two spaces from the link)
buildbot. orphis.ne t/pcsx2/
stereoscopic grpashics plugin: (remove two spaces from the link)
dl. dropboxusercontent.co m/u/13765794/GSdx32-SSE43d.dll
Make sure to use NO "EE Cycle rate" and "VU Cyclerate" speedhacks, but enable all the other ones (like MTVU multi-threading).
As for gsdx (graphics plugin), use dx11 hardware mode (dx9 won't work in stereo 3D), set interlacing to bob tff. Do not set a custom resolution use the option for 3x native or 4x native, depending on your gpu power. (Please keep in mind that rendering resolution is not the only thing bottlenecking the performance of pcsx2, so after a certain point, lowering the resolution will not increase your performance. The emulation of the vector units is very cpu dependant, not gpu.)
Enable texture filtering (full tick), and also enable "enable HW hacks". Click Configure beside it, and enable Half-pixel Offset, or you will get some really bad misalignment of post processing effects (wich are completely missing from the PC version).
For the sound plugin, I recommend Async Mix (under Synchronization mode). and linear interpolation + disable effects processing.
The stereoscopic settings can be changed in-game with hotkeys.
The inital settings are not good for dmc3, it is completely flat, so you will have to change them.
Some text at the top of the screen appears for a few seconds indicating the current stereo settings.
You have to press numpad+ to get the "W" value to 4360 (yes it takes a lot of presses...) and use Ctrl + Shift + numpad+ (or numpad-) to change the "L" value to 46.
Use numpad * to change the 3d display method. I recommend top and bottom mode since the vertical resolution of the game is lower anyway because of the interlaced rendering mode of dmc3.
'*' : Change DisplayMode
Normal :Single
TopBottom :Top And Bottom (Best)
BottomTop :Reverse of TopBottom
LeftRight :Side by Side
RightLeft :Reverse of LeftRight
Interlace :Horizontal Interleave
InterlaceR :Reverse of Interlace
RedCyan :Red and Cyan
RedCyanR :Reverse of RedCyan
Shift+'*' : Change DisplayMode as reverse order
'+' : Increase separation (+10)
'-' : Decrease separation (-10)
Shift+ '+' : convergence (+10)
Shift+ '-' : convergence (-10)
Ctrl + Shift + '+' : convergence +1
Ctrl + Shift + '-' : convergence -1
Also I like to close explorer in task manager to pour all the resources of my machine into pcsx2. You get a blank screen but you can use ctrl + shift + Esc to open tas manager and start pcsx2 from there.