M90p

Processor

 * Intel® Pentium® Processor G6950 with dual-core
 * Intel Core® Processor i3-530 with dual-core
 * Intel Core® Processor i3-540 with dual-core
 * Intel Core® Processor i5-750 with quad-core
 * Intel Core® Processor i5-650
 * Intel Core® Processor i5-660
 * Intel Core® Processor i5-670 with dual-core
 * Processor in LGA1156 socket

Cache

 * 8MB to 32MB cache, processor dependent

Chipset

 * Intel Q57 Express Chipset
 * Platform Controller Hub (PCH) for PCI, ethernet and USB,
 * SMSC® SCH5147 Super I/O

Memory

 * 2GB standard, supports upto 8GB maximum
 * UDIMM, PC3-10600 1333MHz DDR3, four 240-pin DIMM sockets

Audio

 * Integrated ADI Audio
 * High Definition (HD) Audio, Realtek® ALC662 codec, 5.1 Chipset

Networking

 * One gigabit ethernet port
 * Intel 82578DM, Wake on LAN®

Bays

 * One 3.5 inch external accessible bay (Memory Card Reader)
 * One 3.5 inch internal hidden bay (HDD, 2nd optional)
 * Two 5.25 inch external half-high bay (optical drives)

External ports

 * Eight high speed USB connectors (two on front panel and Six on rear panel)
 * One integrated VGA port
 * Ethernet connector
 * One Integrated Display port
 * Two USB 2.0 planar connections (1 used, one open for media reader or 2 rear USB ports)
 * Two audio connectors (microphone in and audio out) on front panel
 * Three audio connectors (line in, audio out, and microphone in) on rear panel
 * Two PS/2 for keyboard and mice

Slots

 * One half-length, full-height, PCIe
 * One half-length, full-height, PCI Express x16
 * Two half-length, full-height, 32-bit PCI 2.3

Power management

 * Advanced Configuration and Power Interface (ACPI) support

Power supply

 * 280 watts with variable speed fan, autosensing, 85% PSU
 * 280 Watt (Japan), 80% plus, auto-sensing power supply unit
 * 115 to 230 Volt; 50 to 60 Hz

Security

 * Security chip (see information on left)
 * One lock to secure both cover and entire system to fixed object:
 * Padlock loop (in rear for opt padlock)
 * Security slot (in rear for optional Kensington® MicroSaver® cable)
 * Power-on password
 * Hard disk password
 * Boot sequence control
 * Boot without keyboard and mouse
 * Serial port I/O control
 * Individual USB port disablement

Operating System

 * Windows Vista Home Basic 32-bit SP1
 * Windows Vista Business 32-bit SP1
 * Windows 7 Professional 32-bit
 * Windows 7 Professional 64-bit
 * Windows 7 Home Premium 32-bit
 * Windows 7 Home Basic 32-bit
 * Windows XP Home SP3 (For LC only) License (Free DOS for Lenovo China) SP1 (SP2 if available) for Windows Vista Home Basic 64/ Home Premium 64/ Ultimate 64/ Enterprise 32 64 (Support Only)
 * Windows XP Home SP3 (Support Only)
 * Windows XP Professional SP3 (Downgrade from Vista Business or Windows 7)
 * Redhat Linux/Novell Linux/ SUSE Linux/Ubuntu Linux (Certified)

Optical Drive

 * DVD-ROM
 * DVD Recordable

Media Card Reader

 * Multi-Slot RTS5111F Card Reader with crust
 * USB 2.0 Mass Storage Device (Flash)

Hard drive features

 * 7200RPM Serial ATA supported
 * Flash Solid State Drive
 * Supports 160GB, 250GB, 320GB, 500GB and 1TB

Video

 * Intergrated Graphics Adapter
 * NVIDIA GeForce 310 512MB DDR3 (VGA+DP)
 * ATI Radeon HD4650
 * NVIDIA Quadro FX380 (DVI + DP)

Source
https://support.lenovo.com/mn/en/solutions/pd000829