Need help for GPU and CPU Upgrade for Lenovo ThinkCentre M55p 8811

Hi friends recently I have decided to make upgrade of my Lenovo ThinkCentre M55p 8811, with the latest Graphic card pny nvidia geforce gtx 550 ti. But however I have seen that the mobo socket is niot supported this Graphic card and also here in this System the PCI slot fails to support the double slot cards. And along with the GPU, I also want to make changes there in Processor which I want to replace the existing one with Core 2 Quad Q6600, so I am very much confused about this upgrade of my System. So if you guys have any ideas about this thing then please let me know.

Yes this ThinkCentre M55p 8811, fail to support most of the GPU. So it is better to make use of some other option available there on eBay or Amazon, you can get any one among the collection of PSU which is suitable and perfectly mounted into the PCI of your Desktop.

The thing that I know about this quad core CPU, that the motherboard doesn’t support the quad core CPU. So it is better to make use of motherboard supporting Processor and GPU to be upgrade in your System. However I have seen that the only error that most of user are facing is “no processor bios update found".