Corona

The Corona is the successor to the Trinity, and is used in the Xbox 360 S. Corona is similar to Trinity, but simplifies the system significantly.

Commonly referred to by the community (but not by Microsoft) as the "Corona V1" (16MB) and "Corona V2" (4GB).

The PSB has been replaced with the KSB
The HANA and Ethernet PHY are removed, their functionality has been integrated into the KSB
Elpida U1032AABG-14-F RAM is no longer used
A 4GB Hynix & Phison MMC solution has been added on 4GB SKUs
The 4GB Memory Unit daughterboard and connector were removed
The standby voltage regulation has been redesigned
The V_1P8STBY power rail has been replaced with V_1P2STBY
The board layout has been simplified and cleaned up

45nm IBM/ATi Valhalla CGPU with integrated 65nm eDRAM
512MB DDR3 RAM
- 4x128MB Hynix H5RS1H23MFR
- 4x128MB Samsung K4J10324KE-HC14
KSB Southbridge
Nand
- 16MB Hynix HY27US08281A
- 16MB ST NAND128W3A2BN6
- 4GB Hynix H27UBG8T2BTA with Phison PS7000 MMC controller

Waitsburg

The Waitsburg is the successor to the Corona, and is used in the Xbox 360 S. It is extremely similar to Corona, with a few minor differences.

Commonly referred to by the community (but not by Microsoft) as the "Corona V3" (16MB) and "Corona V4" (4GB).

Winbond W641GG2JB-14 RAM has been added as an option
Samsung K4J10324KE-HC14 RAM has been replaced with Samsung K4J10324KG-HC14 RAM
The 4GB Hynix & Phison MMC solution on 4GB SKUs has been replaced by a 4GB Hynix H26M31001FPR eMMC
The POST_OUT traces from the CGPU have been removed
Minor board layout changes