Xeon
- Gainestown – 45 nm process technology
- Same processor dies as Bloomfield
- 256 KB L2 cache
- 8 MB L3 cache, 4MB may be disabled
- QuickPath up to 6.4GT/s
- Hyper-Threading is included in some models
- 781 million transistors
- Introduced March 29, 2009
- Variants
- W5590, W5580, X5570, X5560, X5550, E5540, E5530, L5530, E5520, L5520, L5518 – 4 Cores, 8 MB L3 cache, HT
- E5506, L5506, E5504 – 4 cores, 4 MB L3 cache, no HT
- L5508, E5502, E5502 – 2 cores, 4 MB L3 cache, no HT
