As equipped, you are nowhere close. 12GB total RAM is not enough for CS6. Heck, even 16GB is not quite enough for a desktop running CS6, especially if most of your video work involves downsizing HD to SD for DVD. The system needs all of 32GB of RAM just for it to perform anywhere close to fast.

Second, none of the Radeon cards support GPU-accelerated Mercury Playback at all in Windows. You could "hack" a text file to enable CUDA GPU acceleration in MPE for the GT 640 - but why would you want to with this i7-3770/GT 640 combo? The GT 640 is actually slower with GPU acceleration than in software-only mode because it is such a weakling GPU: Tests proved that the retail DDR3 version of the GT 640 is slower than even a GTS 450, let alone a GTX 550 Ti. And even with GDDR5 memory, that GT 640 is no faster than a GTS 450.

Third, as equipped that system has only one single hard drive. If you are also going to use the exact same hard drive for not only the OS and programs, but also for media, projects, previews, cache and exports, that will slow down the system performance significantly - sometimes to the point where overall performance is as slow as or slower than systems equipped with CPUs that are three generations old. This is because one SATA channel only allows data transfers in one direction at a time (due to its half-duplex nature), which means that a block of transfers in one direction must be completed before any transfers can commence in the opposite direction. However, editing and encoding require simultaneous bidirectional transfers, something that a single SATA connection does not allow at all. As such, you will need at least two more SATA hard drives (three or four more drives would be even better).

>any pre-built

Click the ADK link that Harm provided

If you ever decide you want more than 16Gig Ram you can't... you need Win7 64bit PRO for more than 16Gig

If you ever decide you want more Ram, or especially a 3rd and/or 4th hard drive, a 600w PS "may" be a bit small

If your case has a spot for a side fan, to blow outside air onto the motherboard and nVidia card... add it

Otherwise, as a "minimum" system... looks OK to me

Definitely upgrade the video card.  96 CUDA cores vs. 336 CUDA cores.

Plus DDR5 instead of DDR3. The 560 and especially the Ti version are much faster than the 630. I second Bob.

I agree there. In fact, as I have noted a couple of times, the GT 630 is actually a renamed GT 440. And even the DDR5 version of the GT 440 is slower than the retail GT 640 (which itself is slower than even a GTS 450, let alone a GTX 550 Ti).

I completely echo Harm's comments

Also you have a terrible mismatch with the basic system and the graphics card.  With that CPU and 16 GB of RAM that 192 CUDA core GTX 550 Ti is useless  With my PPBM5 testing with an i7-2600K at 4.4 GHz ,16 GB RAM, system it took 146 seconds to perform the our MPEG2-DVD encoding test with the GPU and not using the GPU (CPU only) it took 111 seconds.  You need at least the GTX 560 Ti or better.to balance performance.

I would not recommend such a CPU downgrade because the i5 that you listed lacks Hyperthreading, and is thus limited to four threads maximum. And because Premiere performs better with more CPU threads, the downgrade from an i7-3770K to an i5-3570K would have slowed down everything by a factor of around 20 percent although the MPEG-2 DVD encoding performance with GPU acceleration enabled would not have suffered as much. The downgrade to an i5 would have made the GTX 550 Ti more balanced with the CPU but everything else would have been around 20 percent slower. That's significant, in my view.

Also, the integrated Intel graphics cannot utilize GPU acceleration in MPE at all. Therefore, rendering and MPEG encoding performance falls back entirely onto the CPU.