Waternoose

From XenonLibrary
Revision as of 15:33, 25 December 2023 by Octal450 (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
Waternoose
X02046-001.jpg
DD1
X02046-003.jpg
DD2
X806416-008.jpg
DD3
Part NumberX02046
X806416
IntroducedLate 2005
Designed ByIBM
Microsoft
TypeXCPU
Used InXenon
Zephyr
Elpis
Clock Speed2.8-3.2GHz
CacheL1: 32KB/32KB
L2: 1MB
Instruction SetPowerPC RISC
Cores3
Threads6
Process90nm
TDP75W/85W
PackageFlip-chip BGA899
PredecessorShiva
SuccessorLoki

The Waternoose series are the original production model of the XCPU and are used on Xenon and Zephyr motherboards. They have 75-85W TDPs and are manufactured on a 90nm process.

They are named after the fictional character Henry J. Waternoose III.

Specifications

  • 3 two-way SMD-capable RISC cores clocked at 3.2GHz
  • SIMD: Two VMX128 units
  • 32KB L1 data cache
  • 32KB L1 instruction cache
  • 1MB L2 cache at 1.6 GHz with a 256-bit bus
  • 21.6GB/s FSB
  • 768 bits of IBM eFUSE One-Time-Program memory for fusesets
  • One-Time-Programmable ROM and 64KB SRAM for the 1BL and Config Ring
  • Big-endian architecture
  • A00 stepping (DD1, DD3)
  • B00 stepping (DD2)
  • B01 stepping (DD2.1)
  • 90nm process
  • TDP: 75W/85W

Details

DD1

DD1 is the engineering sample of the XCPU with A00 stepping, labelled XCPU-ES. It runs at 2.8GHz as opposed to the final speed of 3.2GHz. Due to mistakes in the POR sequence, these CPUs can only boot with a Titan board functioning as a service processor to bring up the CPU. It still has the original Xbox logo as it was created before the Xbox 360 name was chosen.

  • Part Number: X02046 (-001)

DD2

DD2 is the initial production version of the XCPU with B00 stepping, running at 3.2GHz. Very early versions with part number X02046-002 used in certain pre-final consoles were still labelled "XCPU-ES" and ran at 2.8GHz.

  • Part Number: X02046 (-002 and -003)

DD2.1

DD2.1

DD2.1 is a minor revision of DD2 with B01 stepping, that improved yield and binned chips for 75W and 85W. This allowed most motherboards to have 75W CPUs.

  • Part Number: X02046 (-004 and up)

DD3

DD3 is a revision of DD2 that fixes minor design issues. With the new part number, the stepping reset to A00. All chips are 75W. It also adds little-endian support which was unused due to all software features requiring full compatibility with the earlier DD2 chip.

  • Part Number: X806416