HP Compaq 4000 Pro

This article is incomplete

Chipset

 * Intel B43 Express with Intel GMA 4500 Graphics

Processors:

 * Intel Celeron E3400 Processor (2.60 GHz, 1M L2 cache, 800 MHz FSB)
 * Intel Celeron E3500 Processor (2.70 GHz, 1M L2 cache, 800 MHz FSB)


 * Intel Pentium E5800 Processor (2.80 GHz, 2M L2 cache, 800 MHz FSB)
 * Intel Pentium E6700 Processor (3.20 GHz, 2M L2 cache, 1066 MHz FSB)
 * Intel Pentium E6800 Processor (3.33 GHz, 2M L2 cache, 1066 MHz FSB)


 * Intel Core 2 Duo E7500 Processor (2.93 GHz, 3M L2 cache, 1066 MHz FSB)
 * Intel Core 2 Duo E7600 Processor (3.06 GHz, 3M L2 cache, 1066 MHz FSB)
 * Intel Core 2 Duo E8400 Processor (3.0 GHz, 6M L2 cache, 1333 MHz FSB)
 * Intel Core 2 Duo E8500 Processor (3.16 GHz, 6M L2 cache, 1333 MHz FSB)
 * Intel Core 2 Duo E8600 Processor (3.33 GHz, 6M L2 cache, 1333 MHz FSB)


 * Intel Core 2 Quad Q9505s Processor (2.83 GHz, 6M L2 cache, 1333 MHz FSB, 65 W TDP)
 * Intel Core 2 Quad Q9550s Processor (2.83 GHz, 12M L2 cache, 1333 MHz FSB, 65 W TDP)

Maximum Memory

 * Supports up to 8GB of DDR3 SDRAM using DIMM modules.

Video Graphics

 * Intel Graphics Media Accelerator 4500 (integrated)
 * NVIDIA NVS 300 512MB graphics card
 * ATI Radeon HD 4550 512MB graphics card

Hard Disk

 * HP 250GB hard disk drive (7,200 rpm, NCQ, Smart IV)
 * HP 320GB hard disk drive (7,200 rpm, NCQ, Smart IV)
 * HP 500GB hard disk drive (7,200 rpm, NCQ, Smart IV)
 * HP 1TB hard disk drive (7,200 rpm, NCQ, Smart IV)

Optical Disk Drives

 * HP DVD-ROM drive
 * HP SuperMulti LightScribe writer drive
 * HP Blu-ray writer drive

Media Card Reader

 * HP Media Card Reader (22-in-1)

Network interface connections

 * Intel 82567V GbE Network Connection (integrated)


 * HP 802.11 b/g/n Wireless NIC (PCIe x1 card)

Muitimedia

 * High Definition Audio with Realtek ALC261 codec (all ports are stereo)
 * Microphone/Headphone front ports (standard)
 * Line-out and Line-in rear ports (standard)
 * Multi-streaming capable (standard)
 * Internal speaker (standard)
 * HP Thin USB powered speakers (optional)

Operating Systems

 * Genuine Windows Vista Business (32-bit)
 * Genuine Windows Vista Home Basic
 * Genuine Windows 7 Starter Edition (32-bit)
 * Genuine Windows 7 Home Basic Edition (32-bit)
 * Genuine Windows 7 Home Premium Edition (32-bit or 64-bit)
 * Genuine Windows 7 Professional Edition (32-bit or 64-bit)
 * Genuine Windows 7 Ultimate Edition (32-bit or 64-bit)
 * Red Flag Linux (available only in China)
 * FreeDOS

Source
https://support.hp.com/us-en/document/c02719867