Upgrade Alienware Aurora R2

Hi,

I've got an old Alienware Aurora R2 Desktop. I would like to add more RAM and a new CPU, but I don't know how to find out which hardware would be compatible.

This is my motherboard:

Motherboard ---------------------------------------------------------------

[Computer]
Computer Brand Name: Alienware Aurora-R2
[Motherboard]
Motherboard Model: Alienware 0RV30W
Motherboard Chipset: Intel P55 (IbexPeak)
Motherboard Slots: 5xPCI Express x1, 2xPCI Express x16
PCI Express Version Supported: v2.0
USB Version Supported: v2.0
[PCH Features]
Intel Identity Protection Technology: Not Supported
USB 2.0 Ports 6 and 7: Supported
PCI Express Ports 7 and 8: Supported
FIS Based Port Multiplier: Supported
SATA Ports 2 and 3: Supported
SATA RAID 0/1/5/10: Supported
[BIOS]
BIOS Manufacturer: American Megatrends
BIOS Date: 06/28/10
BIOS Version: A04
UEFI BIOS: Not Capable
Super-IO/LPC Chip: Fintek F71882 / F71883

and CPU

Intel Core i5-750 ---------------------------------------------------------

[General Information]
Processor Name: Intel Core i5-750
Original Processor Frequency: 2666.7 MHz
Original Processor Frequency [MHz]: 2667
CPU ID: 000106E5
CPU Brand Name: Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz
CPU Vendor: GenuineIntel
CPU Stepping: B1
CPU Code Name: Lynnfield
CPU S-Spec: SLBLC
CPU Thermal Design Power (TDP): 95.0 W
CPU Thermal Design Current (TDC): 89.0 A
CPU Max. Case Temperature (Tcase_max): 72.7 °C
CPU Type: Production Unit
CPU Platform: Socket H1 (LGA1156)
Microcode Update Revision: 7
Number of CPU Cores: 4
Number of Logical CPUs: 4

To sum up, I would need to know what type of CPU and RAM are supported by my system (or a way to find it out myself).

Thank you!  :)

Gabry