Xeon L5640

Details and Benchmarks for Intel Xeon L5640

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Please take all results with a big grain of salt. Sysbuilds is in alpha stage at the moment which can lead to wrong data, strange counting errors, silly results and more. This site is under active development.

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 L5640 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,420 Rank: 1372
Rank Name Score Visual
1368 A9-9430 4,423
+0.1%
1369 Xeon E5540 4,422
+0%
1370 Core i5 650 4,421
+0%
1371 Pentium G3220T 4,421
+0%
1372 Xeon L5640 4,420
1373 PRO A8-8650B 4,420
+0%
1374 Intel Core i7-740QM 4,419
+-0%
1375 Athlon II X3 460 4,418
+-0%
1376 Celeron G1620 4,418
+-0%
1377 Pentium G2010 4,417
-0.1%

View full ranking →

Multicore Score

Multicore performance score for Xeon L5640 based on multi-threaded benchmark results.

4,506 Rank: 1215
Rank Name Score Visual
1211 Core i5-3360M 4,509
+0.1%
1212 Core i3-6100TE 4,508
+0%
1213 Phenom II X4 910e 4,508
+0%
1214 Core i5-4330M 4,507
+0%
1215 Xeon L5640 4,506
1216 Athlon Gold 3150U 4,506
+0%
1217 Ryzen Embedded V1202B 4,505
+-0%
1218 Pentium B980 4,504
+-0%
1219 Core i3-6100E 4,503
-0.1%
1220 Core i5-760 4,503
-0.1%

View full ranking →

Singlecore Score

Single-core performance score for Xeon L5640 based on single-threaded benchmark results.

4,362 Rank: 1426
Rank Name Score Visual
1422 Xeon E5450 4,367
+0.1%
1423 A9-9400 4,366
+0.1%
1424 Core i7-640M 4,365
+0.1%
1425 Phenom II X4 B40 4,364
+0%
1426 Xeon L5640 4,362
1427 Core i5-2557M 4,361
+-0%
1428 Athlon II X4 555 4,361
+-0%
1429 PRO A10-8750B 4,361
+-0%
1430 Phenom II X4 B55 4,360
+-0%
1431 Xeon X5450 4,358
-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 L5640 based on integer math, floating point math, and prime number computation benchmarks.

4,626 Rank: 904
Rank Name Score Visual
900 Core i5-7500T 4,626
+0%
901 Core i5-6400 4,626
+0%
902 Core i5-4460S 4,626
+0%
903 Core i7-3615QM 4,626
+0%
904 Xeon L5640 4,626
905 Core i7-6822EQ 4,625
+-0%
906 Atom C3758 4,625
+-0%
907 Core i7-3635QM 4,625
+-0%
908 Core i7-975 4,625
+-0%
909 Xeon E3-1230 4,624
+-0%

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Data Processing

Aggregated score for Xeon L5640 based on data encryption, data compression, and string sorting benchmarks.

4,619 Rank: 859
Rank Name Score Visual
855 Core i5-4690 4,620
+0%
856 Core i7-8565U 4,620
+0%
857 Core i7-2600S 4,620
+0%
858 Core i5-5675C 4,619
+0%
859 Xeon L5640 4,619
860 Core i5-4670K 4,618
+-0%
861 Core i5-8265U 4,618
+-0%
862 Phenom II X6 1090T 4,618
+-0%
863 Core i5-7600T 4,616
-0.1%
864 Core i7-2960XM 4,616
-0.1%

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Physics & Compute

Aggregated score for Xeon L5640 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,580 Rank: 1022
Rank Name Score Visual
1018 Core i3-4340 4,581
+0%
1019 Core i3-4330 4,581
+0%
1020 Ryzen 3 3250U 4,581
+0%
1021 Xeon W3550 4,580
+0%
1022 Xeon L5640 4,580
1023 Athlon Gold 7220U 4,580
+0%
1024 Core i7-2675QM 4,579
+-0%
1025 Core i5-7300U 4,579
+-0%
1026 Core i3-4170 4,579
+-0%
1027 Core i5-2500S 4,579
+-0%

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Xeon L5640 Details

The Intel Xeon L5640, launched in March 2010, stands as a server-grade processor built on the Westmere-EP architecture, representing a matured iteration of Intel's 32 nm process. Despite its age, the L5640 remains notable for its 6-core design, which, through Hyper-Threading, delivers 12 threads, making it a viable option for multithreaded workloads in legacy systems. With a base clock of 2.266 GHz and a turbo frequency of 2.8 GHz, the processor leverages Intel's Turbo Boost 2.0 technology to enhance performance under variable loads. Its 11.444 MiB of L3 cache and triple-channel DDR3 memory support contribute to efficient data handling, while the 60 W TDP reflects a balanced power profile for server environments. The L5640 operates on Socket 1366 and supports up to two processors in symmetric multiprocessing (SMP) configurations, enhancing scalability for enterprise applications.

In benchmark testing, the Xeon L5640 achieves an Overall Score of 4420, ranking it #1372 among 2060 processors, with a Singlecore Score of 4362 (#1426) and a Multicore Score of 4506 (#1215). These results place it in the mid-tier of its era, outperforming many contemporary consumer-grade CPUs like the Core i5-760 and Pentium B980 but trailing behind more advanced server and workstation chips. The multicore performance, in particular, shows the processor's strength in parallel workloads, though its single-core performance is less competitive when compared to modern high-frequency designs. The processor's performance is comparable to the Core i5-4330M and Phenom II X4 910e, indicating it holds its own in certain workloads despite being over a decade old.

The Xeon L5640 supports a wide array of instruction sets, including AVX, AVX2, AES-NI, and Intel's virtualization technologies like VT-x and VT-d, making it suitable for virtualized environments and data-intensive tasks. ECC memory support ensures reliability in mission-critical applications, while the lack of integrated graphics necessitates a discrete GPU. With its robust feature set and server-focused design, the L5640 is well-suited for legacy enterprise systems, low-power servers, and embedded applications where stability and compatibility are prioritized over raw performance.

As of March 2026, the Xeon L5640 is no longer relevant in the mainstream market, having been surpassed by modern processors in both performance and efficiency. However, it retains niche value in older server deployments, retro computing, or as a cost-effective solution for specific workloads where its architecture and features remain sufficient. Its longevity underscores Intel's design focus on scalability and reliability in server environments, even as technology continues to advance rapidly.
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Intel Xeon L5640

Main Specifications

Designer: Intel
Name: Xeon L5640
Cores: 6
Threads: 12
Base Frequency: 2266 MHz
Clock Multiplier: 17x (locked)
Core Name: Westmere-EP
Socket: Socket 1366
Package: FC-LGA10
Target Segment: Server
TDP: 60 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 EMMX SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX AVX2 ABM BMI1 BMI2 FMA3 AES RdRand ADX CLMUL F16C x86-16 x86-32 x86-64 Real Protected SMM FPU NX HT TBT 2.0 EIST SST TXT vPro VT-x VT-d EPT AVX-512 AVX512F AVX512CD AVX512BW AVX512DQ AVX512VL TSX VMD NM KPT PTT MBE Ctrl DL Boost AVX512_VNNI
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