Vejle

Valhalla
Vejle

Valhalla
Valhalla with IHS removed
Part Number	X818337
Introduced	Mid 2010
Designed By	IBM Microsoft
Type	XCGPU
Used In	Trinity Corona Waitsburg Stingray
Clock Speed	3.2GHz (CPU) 500MHz (GPU)
Cache	L1: 32KB/32KB (CPU) L2: 1MB (CPU)
Memory	10MB eDRAM (GPU)
Instruction Set	PowerPC RISC (CPU)
Cores	3 (CPU)
Threads	6 (CPU)
Process	45nm (CGPU die) 65nm (eDRAM die)
Package	Flip-chip BGA1155
Predecessor	Loki Kronos
Successor	Oban

Valhalla (also known as Vejle) is the first XCGPU and is used on the Trinity, Corona, Waitsburg, and Stingray motherboards. It is the successor to Loki CPU and Kronos GPU and is manufactured on the 45nm process (except for the eDRAM daughter-die, which still used Styx-65). Valhalla adds an integrated heat spreader over the dies.

Specifications

CPU

• 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
• A02 stepping
• 45nm process

GPU

• 500Mhz clock speed
• 48 floating-point vector processors divided into 3 dynamically scheduled SIMD groups (16 each)
• Unified shader architecture
• 16 texture addressing units
• 16 texture filtering units
• 8 pixel rendering pipelines
• Direct access to CPU L2 cache
• A02 stepping
• 45nm process

eDRAM (Styx-65)

• 10MB 256GB/s eDRAM
• Contains logic for:
  • 4-sample anti-aliasing
  • Alpha compositing
  • Color
  • Z/stencil buffering
• GS21 stepping
• 65nm process

Details

Valhalla uses the Styx-65 eDRAM.

• Part Number: X818337

Prototypes

Engineering Samples by stepping.

A00

First version.

• Part Number: Unknown

A01

Minor update.

• Part Number: X850448-001

A02

Minor update. Engineering sample for the final production chip.

• Part Number: Unknown