thebranded

I've been running a eGPU for a few months now. Hardware: HP 2530p HP 2530p Dock Samsung 24" Screen GTS450 Accelero S1 GPU Cooler + Turbo Fans PE4H 1.4 Xbox360 PSU Screen is plugged into the dock via the VGA port and to the eGPU via the DVI cable. With the laptop docked eGPU off, I get dual screen via the dock VGA port to the 24" and the internal laptop screen. When I turn on the eGPU wait about 5 seconds then plug the express port card in and switch over my screen to the DVI i get the screen driven by the eGPU. To go back to normal, i eject the eGPU via the add/remove hardware icon in the task bar, then switch over the screen back to VGA input and power of the eGPU. never did any proper gpu tests, but can play TF2/Borderlands1/Borderlands2 at mid to max settings so its doing well for me. One question regarding the 1x pci-e limit, what GPU am i limited to? or at what point is it pointless to get a better card as i have maxed out the 1x port? This is assuming i do not run dual pcie cables tot he laptop.