12MB L3 Cache · 5.86GT/s QPI · Hyper-Threading · Turbo Boost 2.93GHz · 80W TDP
Westmere-EP · 32nm · Dual-Socket (DP) · ECC DDR3 · Up to 288GB RAM · LGA1366
SLBVC = Intel S-Spec stepping code (printed on processor IHS)
E5640 = Intel processor model number
AT80614005137AA = Intel OEM tray processor ordering code (MM# 899929)
| Processor | Intel Xeon E5640 |
| S-Spec / Stepping | SLBVC (C2 stepping) |
| Architecture | Westmere-EP (32nm) |
| Cores / Threads | 4 Cores / 8 Threads (Hyper-Threading) |
| Base Frequency | 2.66 GHz |
| Max Turbo Frequency | 2.93 GHz (Intel Turbo Boost 1.0) |
| L3 Cache | 12MB Intel Smart Cache |
| Bus / QPI Speed | 5.86 GT/s (2x QPI Links) |
| Socket | LGA1366 / FCLGA1366 |
| TDP | 80W |
| Max Memory | 288GB DDR3-800/1066 · ECC Registered · 3-Channel |
| Max Memory Bandwidth | 25.6 GB/s |
| Max CPU Config | 2-Way Dual Processor (DP) |
| TCASE Max | 77.6°C |
| Package Size | 42.5mm × 45mm |
Always verify CPU support in your server/motherboard QVL or vendor CPU support list before installing.
The Intel Xeon E5640 is a Westmere-EP quad-core server processor built on Intel's 32nm process technology. Part of the Xeon 5600 series (Gulftown/Westmere-EP), it delivers 4 cores and 8 threads with Intel Hyper-Threading and Turbo Boost 1.0 technology. With an 80W TDP, it offers a solid balance of performance and power efficiency for 1U and 2U rack server platforms.
This CPU supports up to 288GB of ECC DDR3 memory across 3 memory channels and can be paired with a second E5640 (or compatible Xeon 5600 series CPU) in dual-socket platforms for a total of 8 cores and 16 threads per server.
⚠️ CPU heatsink/cooler is not included. A compatible LGA1366 server heatsink is required. Thermal paste is not included — apply fresh paste during installation.