PSB
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| Part Number | X817692 |
|---|---|
| Introduced | 2008 |
| Designed By | Microsoft SiS |
| Type | Southbridge |
| Used In | Xenon Zephyr Falcon |
| Process | 150nm |
| TDP | 3.2W |
| Package | Flip-chip BGA382 |
| Predecessor | XSB |
| Successor | KSB |
PSB is a Southbridge used in the Xbox 360. It is the successor to XSB. The only major difference is the inclusion of an updated flash controller that can support 256 and 512MB flash chips and use them as a system flash and Memory Unit.