hello I had 8 gigs ram in the system and I upgraded to 16gigs, I don't know what kind of motherboard it is, I think its an tax its really small, here are more specs
AMD Phenom II 960T Quad-Core
Processor Speed
3.0 GHz
Processor Cores
4
RAM
8GB PC3-10600 DDR3 (Expandable to 16 GB)
Hard Drive Capacity
1.5 TB
Hard Drive Speed (Revolutions Per Minut
5400 RPM
ATI Radeon HD 4200 Graphics
Dedicated Video Memory
No
Shared Video Memory
Up to 3067 MB
Video Memory
Not Applicable
Display
HDCP Compliant
Not Applicable
Audio
Audio Output
High Definition Audio; 7.1 Surround Sound Capabilities
Digital Input
No
Digital Output
Coaxial Digital Audio Out (SP-DIF)
Line Out
Yes
Line-In input
Yes
Sound Card
AMD 785G Chipset
Speaker Wattage
Not Applicable
Speakers
No
Networking
Ethernet Port
10/100Base-T
Integrated Bluetooth
No
Integrated WiFi
802.11b/g/n
Inputs/Outputs
Card Reader
15-In-1 Card Reader
Component Output
No
Composite Output
No
DVI Output
Yes
E-SATA
No
FireWire (IEEE 1394)
No
HDMI
No
No
S-Video Output
No
USB Ports
4 USB 2.0 Ports (Back); 2 USB 2.0 Ports (Front)
Available Hard Drive Bays
1 External 3.5" (Available); 2 Internal 3.5" (One Available)
Available Memory Slots
4 DIMM (240-Pin; DDR3) (Two Available)
Available Optical Bays
2 External 5.25" (One Available)
Available PCI Slots
No
Available PCI-E Slots
3 PCI Express x1 (Available); 1 PCI Express x16 (Available)
Processor Cache
2 MB L2 + 6 MB Shared L3
System Bus
4.0 GT/s
Tower Depth
41.0 cm
Tower Height
38.8 cm
Tower Width
17.5 cm
Tower Weight
9.6 kg