Xeon X5660

Details and Benchmarks for Intel Xeon X5660

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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 X5660 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,704 Rank: 1100
Rank Name Score Visual
1096 Core i5-5300U 4,708
+0.1%
1097 Xeon D-1559 4,707
+0.1%
1098 Core i7-3940XM 4,705
+0%
1099 Core i5-3340 4,705
+0%
1100 Xeon X5660 4,704
1101 Pentium G3450 4,704
+0%
1102 Core m3-8100Y 4,703
+-0%
1103 Core i7-6500U 4,702
+-0%
1104 Core i3-4160T 4,701
-0.1%
1105 Xeon X3470 4,699
-0.1%

View full ranking →

Multicore Score

Multicore performance score for Xeon X5660 based on multi-threaded benchmark results.

4,786 Rank: 865
Rank Name Score Visual
861 Core i5-4570 4,787
+0%
862 Core i7-2700K 4,787
+0%
863 Ryzen Embedded V1807B 4,786
+0%
864 Core i3-9300T 4,786
+0%
865 Xeon X5660 4,786
866 Core i7 980 4,784
+-0%
867 Core i5-7600T 4,783
-0.1%
868 Core i7-4700HQ 4,783
-0.1%
869 Core i7-3720QM 4,782
-0.1%
870 Ryzen 5 PRO 2500U 4,781
-0.1%

View full ranking →

Singlecore Score

Single-core performance score for Xeon X5660 based on single-threaded benchmark results.

4,650 Rank: 1176
Rank Name Score Visual
1172 Core i5 M 450 4,659
+0.2%
1173 Xeon X3460 4,658
+0.2%
1174 A12-9800E 4,656
+0.1%
1175 Xeon X5677 4,652
+0%
1176 Xeon X5660 4,650
1177 Core i3-2105 4,650
+0%
1178 Xeon D-1577 4,647
-0.1%
1179 Core i7 860 4,647
-0.1%
1180 Ryzen 3 3250U 4,646
-0.1%
1181 Xeon X5680 4,645
-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 X5660 based on integer math, floating point math, and prime number computation benchmarks.

4,675 Rank: 744
Rank Name Score Visual
740 Core i3-8300 4,675
+0%
741 Ryzen 3 PRO 1300 4,675
+0%
742 Xeon E5-1620 v2 4,675
+0%
743 Core i7-4930MX 4,675
+0%
744 Xeon X5660 4,675
745 Core i7-7820EQ 4,674
+-0%
746 Core i7-6700T 4,674
+-0%
747 Core i7-3770K 4,674
+-0%
748 Xeon E3-1270 V2 4,674
+-0%
749 Core i3-9300T 4,673
+-0%

View full ranking →

Data Processing

Aggregated score for Xeon X5660 based on data encryption, data compression, and string sorting benchmarks.

4,682 Rank: 727
Rank Name Score Visual
723 Xeon E5-2637 v2 4,683
+0%
724 Core i5-1035G7 4,682
+0%
725 Core i7-6920HQ 4,682
+0%
726 Core i7-5950HQ 4,682
+0%
727 Xeon X5660 4,682
728 Core i7-1185GRE 4,682
+0%
729 Core i5-8279U 4,681
+-0%
730 Xeon E3-1545M v5 4,680
+-0%
731 Core i7-7820HQ 4,679
-0.1%
732 Core i7-4940MX 4,679
-0.1%

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Physics & Compute

Aggregated score for Xeon X5660 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,626 Rank: 895
Rank Name Score Visual
891 Ryzen 7 PRO 3700U 4,627
+0%
892 Core i5-7260U 4,627
+0%
893 Xeon E3-1240 4,627
+0%
894 Core i5-3570 4,626
+0%
895 Xeon X5660 4,626
896 Core i7-7660U 4,625
+-0%
897 Core i5-7360U 4,625
+-0%
898 Core i5-7287U 4,625
+-0%
899 Core i7-2600 4,625
+-0%
900 Core i7-3635QM 4,625
+-0%

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Xeon X5660 Details

Built on Intel's Westmere-EP architecture at a 32 nm process, the Xeon X5660 is a server-grade processor that debuted in March 2010. While long past its prime by modern standards, it remains a notable example of Intel’s early 64-bit multi-core server CPUs, featuring a 65 W TDP and a dual-socket (SMP) capable design. With a base clock of 2.8 GHz and a turbo boost up to 3.2 GHz, the Xeon X5660 delivers strong performance for its era, especially in multi-threaded workloads. It supports up to 288 GB of DDR3 memory across a triple-channel interface, with ECC support ensuring data integrity in mission-critical environments. The chip also integrates Intel's vPro technology and virtualization features like VT-x and VT-d, making it well-suited for enterprise and virtualized server deployments.

The Xeon X5660 features six cores with a total of 12 threads, thanks to Intel Hyper-Threading technology, allowing it to efficiently handle concurrent tasks. It includes a 12 MB L3 cache, 0.061 MiB of L1 cache, and 0.244 MiB of L2 cache, supporting a robust memory subsystem with a maximum bandwidth of 32 GB/s. The processor uses the FCLGA1366 socket and supports PCI Express 2.0 with up to 16 lanes, enabling connectivity for high-speed storage and expansion cards. Despite its advanced features, the Xeon X5660 lacks integrated graphics, meaning users must rely on a discrete GPU for visual output.

In benchmark testing, the Xeon X5660 achieves an overall score of 4704, ranking #1100 out of 2060 processors, with a single-core score of 4650 (#1176) and a multicore score of 4786 (#863). It compares closely with contemporaries such as the Core i5-4570 and Xeon X3460, though it trails behind more modern processors like the Ryzen Threadripper and Core Ultra series. The processor's multicore performance is its strongest attribute, reflecting its design for server and workstation environments where thread density matters more than single-core speed. While the single-core score is solid, it falls behind many modern CPUs, highlighting the generational gap.

As of March 2026, the Xeon X5660 is best suited for legacy systems, retro computing projects, or low-cost server applications where power efficiency and cutting-edge performance are not priorities. Its 32 nm manufacturing process and 95 W TDP make it less efficient compared to today's 5 nm and 7 nm chips, and its lack of integrated graphics limits its use in consumer desktops. However, its support for ECC memory, virtualization, and multi-socket configurations ensures it remains a reliable choice in niche enterprise environments where compatibility with older systems is essential.
Frequently Compared

AMD Ryzen Threadripper PRO 7975WX 29 views

Intel Xeon X3470 27 views

Intel Xeon E5-2670 v2 27 views

Intel Celeron N2807 25 views

AMD Phenom X3 8650 25 views

AMD Ryzen 7 PRO 4750G 23 views

AMD Phenom II X4 975 23 views

Intel Xeon w5-3425 23 views

AMD Ryzen 9 3900XT 23 views

AMD A10-9600P 22 views

Intel Xeon X5660

Main Specifications

Designer: Intel
Name: Xeon X5660
Model Number: X5660
Cores: 6
Threads: 12
Base Frequency: 2800 MHz
Clock Multiplier: 21x (locked)
Core Name: Westmere-EP
Socket: FCLGA1366
Package: FC-LGA10
Target Segment: Server
Max CPUs: 2
TDP: 95 W

Cache Specifications

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

Memory Specifications

Supported Memory Type: DDR3 800/1066/1333
Memory Channels: 3
Maximum Memory: 0 GB
Maximum Bandwidth: 32 GB/s
ECC Support: Yes

PCI-Express Specifications

PCIe Revision: Up to 3.0
PCIe Lanes: 16
PCIe Configuration: Up to 1x16, 2x8, 1x8+2x4

Integrated Graphics

GPU: HD Graphics 4600
GPU Designer: Intel
GPU Max Frequency: 1100 MHz

Physical Specifications

Process: 32 nm
Die Area: 239 mm²
Manufacturer: Intel
Word Size: 64-bit

CPU Features

MMX SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX2 AES x86-64 HT EIST TXT vPro VT-x VT-d EPT Secure Key SMEP SIPP IPT TSX Flex Memory FMA
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