There were several different retail Xbox hardware revisions, which include the following:

Xbox 1.0
- USB controller is on a separate PCB
- GPU has a fan on the heat sink
Xbox 1.1
- USB controller moved onto the motherboard
- Fan removed from the GPU heat sink
Xbox 1.2
- TSOP Size now 256k (Initial Size 1024k)
- Updated Board Layout
- Switched to ATX Power connector
Xbox 1.3
- Removed LFrame signal from LPC Port
Xbox 1.4
- Updated Board Layout
- Switched to the 'Focus' Video Encoder
Xbox 1.5
- 3.3v and GND removed from LPC
Xbox 1.6
- New Board Layout with additional RAM Pads removed
- Removed data and power lines from LPC port
- Xyclops chip (includes ROM instead of flash = BIOS no longer flashable)
- Switched to the 'XCalibur' Video Encoder
- Microsoft later switched to lower quality Hynix RAM. These Xboxes with non-Samsung RAM are sometimes referred to as 1.6b by the modding community.

You can find more information about the hardware used in each revision below.

2Identifying
- 2.3DVD Drive

History of Xbox 1.5

The DVDrom drive is using the MT1358E (MT1359E is the 360 Sata version) from Mediatek, and has a 39SF020A flashrom. If the firmware from this drive is applied to a SAMSUNG 616T or 616F PC dvd drive it will behave as a Xbox one, modified hardware will allow for tray state and eject to work. Located under the device as seen below. If the physical serial number is scratched, faded, damaged or covered by a skin, the serial number can be pulled from the 'Command Prompt'. Open your 'Start Menu' by clicking on the Windows logo at the lower-left corner of the screen. Type in 'cmd' and open 'Command Prompt' from the search results.

There has been no conclusive evidence pointing to their existence, and all 1.5 sightings to date have turned out to be 1.4 boards.They possibly never existed^{[citation needed]}, but will otherwise be very rare. Production was halted and 1.4 was produced again^{[citation needed]}.

Identifying

While not definitive, here are some ways to help identify the revision of your Xbox.

Manufacturing Details

Date Range	Revision	Location
01/2001–07/2002	1.0	Hungary, Mexico
08/2002-01/2003	1.1	China, Mexico
01/2003-03/2003	1.2	China
04/2003-07/2003	1.3	China
09/2003-03/2004	1.4,1.5	China
04/2004-09/2004	1.6	China, Taiwan
09/2004-08/2005	1.6b	China, Taiwan

Serial Number

The serial number looks like this:

LNNNNNN YWWFF

L is the production line
NNNNNN is the number produced that week
Y is the last digit of the production year
WW is the number of the week
FF is the factory code

Note, this table contradicts the previous table.

Factory	Location	Revision
02	Mexico	1.0 or 1.1
03	Hungary	1.0
05	China	1.1 or later
06	Taiwan	1.2 or later

Serial Number	Revision
LNNNNNN 20WFF	1.0
LNNNNNN 21WFF	1.0
LNNNNNN 23WFF	1.0 or 1.1
LNNNNNN 24WFF	1.1
LNNNNNN 25WFF	1.1
LNNNNNN 30WFF	1.2
LNNNNNN 31WFF	1.3
LNNNNNN 32WFF	1.3
LNNNNNN 33WFF	1.4 or 1.5
LNNNNNN 42WFF	1.6
LNNNNNN 43WFF	1.6b

DVD Drive

There are four retail drives known to be used by Microsoft in the retail version of the console.Any Xbox DVD drive can be used in any retail Xbox.

List of Xbox DVD Drive manufacturers

Thomson (Xbox 1.0, 1.1)
Philips (Xbox 1.1 and above)
Samsung (Any)
Hitachi-LG (8050L)(mainly 1.6?)

THOMSON TGM600

The first manufacture is sadly also the worst of all Dvdrom drives manufactured for the original xbox.It has a Cirrus Logic CL-CR3710-60EC-F as its main controller and a 8/3062 HD 64F3062F25 16bit H8/300H secondary samller MPU,at 25Mhz Unkown sofar if there is external flash or if its inside the Cirrus Logic IC.

SAMSUNG SDG605

The Samsung drive is a very popular DVDrom drive for its compatibility for most media types and better quality laser. There are 2 mayor revisions found for this manufacturer

X00603-005 Plays CDR
X00603-006 Wont play CDR

Commodore4Eva released a hacked firmware for this drive which enables modified backups to work. There is also a '0800' firmware for this drive which allows to dump the entire SS. The firmwares are not linked here for legal reasons.

Original firmware for the similar PC drive SD-616F (F105).

PHILIPS VAD6035/21

Also named: VAD6011/21 appears to have no brand or part number on its large main controller, might be Cirrus Logic based on its size and use of a Philips secondary smaller MCU. flash might be a 39SF020A from SST. The laser ribbon cable connector is different for its various revisions, a detail one must take into account when swapping controller boards.

There should be a tutorial on how to convert a PC DVD-ROM drive Pioneer 500M with the Philips firmware to be an Xbox DVD-ROM drive.

HITACHI-LG GDR-8050L

This DVD-rom drive, most commonly found in Xbox 1.6 and 1.6b is capable of reading DVD-+R, DVD-RW and CDRW media, but fails to boot most CD-R discs source: xbox-hq.com Hitachi-LG GDR-8050L DVD Drive In Xbox.

Xbox One Serial Number Checker Software

The latest manufacture for the DVDrom drive probably used a Panasonic MN103S89FDA for its main controler, appears to have no external flashrom.with this firmware and modified hardware for Eject and traystate, a LG GDR-8163B or LG DRD-8160B might act as a drop in replacement after altering either case.

On 30 January 2006 TheSpecialist posted at xboxhacker.net that he successfully flashed a Hitachi drive to boot a copied game on an unmodded xbox: breakthrough: XBOX 1 firmware hacked !

There is also an IDC Script and information about the firmware which was recovered from xboxhacker.net / old forum posts.

Hard Drive

Revision	Drive Manufacturer	Drive Model Number	Capacity
1.0	Seagate	ST310211A	10G
1.0 (XB:2001-10-26 FF=02)	Western Digital	WD80EB-00CGH0	8G
1.1 (XB:2001-10-29 FF=03)	Western Digital	WD80EB-28CGH1