Xeon E5640

Details and Benchmarks for Intel Xeon E5640

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Benchmark Results

Combined benchmark scores based on multiple data points, giving a quick overview of this processor's performance.

Overall Score

Overall score for Xeon E5640 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,434 Rank: 1355
Rank Name Score Visual
1351 Pentium G2020 4,435
+0%
1352 Athlon X4 860K 4,435
+0%
1353 A12-9730P 4,434
+0%
1354 Pentium G870 4,434
+0%
1355 Xeon E5640 4,434
1356 A10-9630P 4,432
+-0%
1357 Xeon E5440 4,432
+-0%
1358 Xeon E5-2650L v2 4,431
-0.1%
1359 Core i5-2390T 4,431
-0.1%
1360 Athlon X4 840 4,431
-0.1%

View full ranking →

Multicore Score

Multicore performance score for Xeon E5640 based on multi-threaded benchmark results.

4,564 Rank: 1144
Rank Name Score Visual
1140 Core i3-10110U 4,565
+0%
1141 Xeon E3-1235 4,565
+0%
1142 Core M3-7Y32 4,564
+0%
1143 Core i5-2500S 4,564
+0%
1144 Xeon E5640 4,564
1145 Core i5-6267U 4,562
+-0%
1146 Core i7 870 4,561
-0.1%
1147 Core i3-1000NG4 4,560
-0.1%
1148 Athlon PRO 200GE 4,558
-0.1%
1149 Xeon X3430 4,558
-0.1%

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Singlecore Score

Single-core performance score for Xeon E5640 based on single-threaded benchmark results.

4,347 Rank: 1443
Rank Name Score Visual
1439 Core i7-2617M 4,350
+0.1%
1440 Core i7-860 4,349
+0%
1441 A8-6500 4,348
+0%
1442 Phenom 9550 4,347
+0%
1443 Xeon E5640 4,347
1444 Xeon W3540 4,347
+0%
1445 Pentium E6800 4,346
+-0%
1446 Phenom II X4 960T 4,344
-0.1%
1447 Xeon X5460 4,343
-0.1%
1448 Xeon E3110 4,342
-0.1%

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Workload Scores

Performance scores grouped by workload type, normalized and aggregated from multiple raw benchmark results.

Number Crunching

Aggregated score for Xeon E5640 based on integer math, floating point math, and prime number computation benchmarks.

4,599 Rank: 966
Rank Name Score Visual
962 Xeon W3530 4,601
+0%
963 Core i5-2500 4,600
+0%
964 Core i7-2920XM 4,600
+0%
965 Xeon W3540 4,600
+0%
966 Xeon E5640 4,599
967 Core i5-6400T 4,598
+-0%
968 Core i7-860 4,598
+-0%
969 Pentium Gold G5620 4,597
+-0%
970 Core i7-2760QM 4,597
+-0%
971 Core i7-930 4,597
+-0%

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Data Processing

Aggregated score for Xeon E5640 based on data encryption, data compression, and string sorting benchmarks.

4,572 Rank: 989
Rank Name Score Visual
985 Xeon E3-1225 4,573
+0%
986 Core i7-940 4,573
+0%
987 Core i3-9100TE 4,573
+0%
988 Core i3-7300 4,572
+0%
989 Xeon E5640 4,572
990 Xeon E5630 4,572
+0%
991 Core i5-2400 4,570
+-0%
992 Xeon W3540 4,570
+-0%
993 Core i7-2630QM 4,569
-0.1%
994 Core i5-3330 4,569
-0.1%

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Physics & Compute

Aggregated score for Xeon E5640 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,582 Rank: 1014
Rank Name Score Visual
1010 Core i3-8145U 4,582
+0%
1011 Xeon W3570 4,582
+0%
1012 Xeon W3565 4,582
+0%
1013 Core i5-2300 4,582
+0%
1014 Xeon E5640 4,582
1015 Core i7-930 4,582
+0%
1016 Core i7-880 4,582
+0%
1017 Core i3-6100T 4,581
+-0%
1018 Core i3-4340 4,581
+-0%
1019 Core i3-4330 4,581
+-0%

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Xeon E5640 Details

As of March 2026, the Intel Xeon E5640 remains a notable example of server-class computing from the early 2010s, with a multicore performance score of 4564 placing it at #1142 out of 2060 processors. While this may seem modest by today's standards, the processor’s position in the broader performance landscape reveals an interesting story of endurance and niche relevance. Its single-core score of 4347 ranks it at #1442, and its overall score of 4434 lands it at #1353, indicating that while the E5640 holds its own in multi-threaded tasks, its single-threaded capabilities are more average, especially when compared to modern high-frequency designs. The gap between its multicore and single-core performance highlights its design philosophy: a focus on parallel workloads rather than raw per-core speed.

The Xeon E5640 is built on Intel's Westmere-EP architecture, a 32 nm process node that was a significant step forward in its time, featuring 1.17 billion transistors and a 239 mm² die size. The processor operates at a base frequency of 2.666 GHz, with a turbo boost up to 2.933 GHz, and is equipped with 4 cores and 8 threads thanks to Intel Hyper-Threading. This allows the chip to efficiently handle virtualized environments and multi-threaded server workloads, particularly in scenarios where throughput is prioritized over latency. The integrated L3 cache of 11.444 MiB provides a substantial buffer for data-intensive operations, while the L1 and L2 caches are sized at 0.061 MiB and 0.244 MiB, respectively, ensuring efficient data access at the core level.

Memory support includes DDR3 with a triple-channel interface, which was standard for its generation, and ECC memory is supported—a critical feature for server environments where data integrity is paramount. The processor is packaged in the FC-LGA10 socket, compatible with Socket 1366, and features a TDP of 80 W, which requires adequate cooling solutions for sustained operation. While the Xeon E5640 lacks integrated graphics, it relies on PCIe Gen 2 for connectivity, supporting up to two processors in a symmetric multiprocessing (SMP) configuration, further enhancing its scalability in enterprise systems.

Despite being over a decade old, the Xeon E5640 still finds use in legacy server environments, particularly where cost-effective, stable processing power is needed. Its performance in synthetic benchmarks, though overshadowed by today’s top-tier CPUs like the Ryzen Threadripper PRO 9995WX or Core Ultra 9 285K, remains competitive within its own class. In the top 50 multicore list, it trails far behind modern processors, but it still outperforms many older consumer-grade chips like the Core i7-860 or Xeon E5440. This suggests that while the E5640 is no longer a contender in mainstream computing, it remains a viable option for specific server or workstation applications where legacy support and reliability are valued over cutting-edge performance.
Frequently Compared

AMD Ryzen Threadripper 1950X 6 views

AMD Ryzen 5 7600 5 views

Intel Xeon E5-2650L v4 5 views

Intel Pentium Gold G5600 5 views

AMD Ryzen 5 3600 4 views

AMD Ryzen 9 PRO 3900 4 views

AMD Ryzen 5 3500X 4 views

AMD Athlon II X2 265 4 views

AMD Ryzen 3 PRO 2200GE 3 views

AMD A6-3620 3 views

Intel Xeon E5640

Main Specifications

Designer: Intel
Name: Xeon E5640
Cores: 4
Threads: 8
Base Frequency: 2666 MHz
Clock Multiplier: 20x (locked)
Core Name: Westmere-EP
Socket: Socket 1366
Package: FC-LGA10
Target Segment: Server
TDP: 80 W

Cache Specifications

L1 Cache: 62.464 KiB
L2 Cache: 0.244 MiB
L3 Cache: 11.444 MiB

Memory Specifications

Supported Memory Type: DDR3

Physical Specifications

Process: 32 nm
Die Area: 239 mm²
Manufacturer: Intel

CPU Features

MMX SSE SSE2 SSE3 SSSE3 SSE4.2 EIST TXT VT-x
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