in that link you supplied under "customer reviews" i found this:
I ripped out the paltry 250w power supply and added a 775w Thermaltake modular PS (a modular power supply is definitely needed due to the limited space in the case). Then I installed two additional 500gb 7200RPM hard drives, as well as an EVGA GTX 560 Ti 2gb graphics card. After install and configuration, there was a marked performance increase...with Windows 7 showing a 7.8 experience score for graphics. The machine also runs very cool.
For gaming, I can now enjoy playing games at full maximum or near max settings with 1920 x 1080 (i.e. 1080p) resolution (as an example, the graphically intense and jaw-dropping beautiful Witcher 2 runs flawless at absolute maximum **except** I keep 'ubersampling' turned off). I really am quite impressed.
If you are going to attempt a similar upgrade, please be aware...
The case is small, but with careful planning, everything will fit as expected and I experienced no unusual hiccups during installation (I cannot vouch for longer graphics cards (10+ inches), but the 560 fit like a champ).
so yes it can be done. it obviously has an open pci-x slot