Pentium G645

Details and Benchmarks for Intel Pentium G645

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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 Pentium G645 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,395 Rank: 1407
Rank Name Score Visual
1403 Intel Core i3-390M 4,399
+0.1%
1404 Core M-5Y10 4,399
+0.1%
1405 Core i5-650 4,399
+0.1%
1406 Xeon L5638 4,396
+0%
1407 Pentium G645 4,395
1408 A8-6600K 4,394
+-0%
1409 Core i7-860 4,394
+-0%
1410 Athlon II X4 555 4,393
+-0%
1411 A6-9500E 4,393
+-0%
1412 Phenom 9550 4,393
+-0%

View full ranking →

Multicore Score

Multicore performance score for Pentium G645 based on multi-threaded benchmark results.

4,297 Rank: 1766
Rank Name Score Visual
1762 A4-6210 4,298
+0%
1763 Sempron 3850 4,298
+0%
1764 Celeron 3855U 4,297
+0%
1765 Core i3-6006U 4,297
+0%
1766 Pentium G645 4,297
1767 Xeon E5506 4,297
+0%
1768 Intel Atom x5-E8000 4,296
+-0%
1769 Celeron 1000M 4,296
+-0%
1770 A4-4000 4,295
+-0%
1771 Pentium P6100 4,295
+-0%

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Singlecore Score

Single-core performance score for Pentium G645 based on single-threaded benchmark results.

4,461 Rank: 1328
Rank Name Score Visual
1324 Core i5-750 4,465
+0.1%
1325 Pentium G3220T 4,463
+0%
1326 Phenom II X4 B65 4,461
+0%
1327 A10-5700 4,461
+0%
1328 Pentium G645 4,461
1329 Core i5-4300Y 4,461
+0%
1330 Core i7-970 4,461
+0%
1331 Core i7-880 4,460
+-0%
1332 Core i5-2390T 4,459
+-0%
1333 Phenom II X6 1075T 4,458
-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 Pentium G645 based on integer math, floating point math, and prime number computation benchmarks.

4,514 Rank: 1430
Rank Name Score Visual
1426 Athlon 5350 4,515
+0%
1427 Core i7-2677M 4,514
+0%
1428 Core i5-2435M 4,514
+0%
1429 Atom C3508 4,514
+0%
1430 Pentium G645 4,514
1431 A6-9500 4,514
+0%
1432 A6-3620 4,514
+0%
1433 Celeron G1620T 4,514
+0%
1434 Core i5-580M 4,514
+0%
1435 Athlon II X4 605e 4,514
+0%

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Data Processing

Aggregated score for Pentium G645 based on data encryption, data compression, and string sorting benchmarks.

4,476 Rank: 1479
Rank Name Score Visual
1475 A8-4500M 4,477
+0%
1476 Atom x5-Z8550 4,477
+0%
1477 Pentium N3700 4,476
+0%
1478 Core i3-2348M 4,476
+0%
1479 Pentium G645 4,476
1480 Celeron G1620 4,476
+0%
1481 Athlon II X2 265 4,476
+0%
1482 Core M-5Y10c 4,476
+0%
1483 A10-4655M 4,476
+0%
1484 A6-3410MX 4,476
+0%

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Physics & Compute

Aggregated score for Pentium G645 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,498 Rank: 1422
Rank Name Score Visual
1418 Celeron G3900T 4,498
+0%
1419 Pentium Silver N5000 4,498
+0%
1420 Celeron G1830 4,498
+0%
1421 Pentium G870 4,498
+0%
1422 Pentium G645 4,498
1423 Phenom II X4 810 4,498
+0%
1424 Xeon E5420 4,498
+0%
1425 Phenom II X3 B77 4,498
+0%
1426 Celeron N4100 4,497
+-0%
1427 Xeon X5472 4,497
+-0%

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Pentium G645 Details

The Intel Pentium G645, launched in September 2012, stands as a relic of the early Sandy Bridge era, now more than a decade old. Despite its age, it remains a relevant entry in the entry-level desktop segment, particularly for systems where integrated graphics and modest performance are sufficient. Built on a 32 nm process and featuring a dual-core, dual-thread design, the G645 delivers a base clock of 2.9 GHz with a turbo frequency of 2.7 GHz—though the latter is rarely relevant given the lack of SMT and the locked multiplier. With a 65 W TDP and support for DDR3-1066 memory across a dual-channel interface, it strikes a balance between performance and power efficiency typical of its time.

The processor’s integrated Intel HD Graphics (Sandy Bridge) provides a modest but functional GPU solution, capable of handling basic multimedia and light gaming at lower resolutions. It operates at up to 1.1 GHz and supports up to two displays, making it suitable for secondary systems or office environments. The L3 cache, at 3 MB, is generous for its class, helping mitigate latency in memory-intensive workloads. The 504 million transistors and 131 mm² die size reflect Intel's mature process at the time, though it lacks modern features like AVX2 support, which is not available on Sandy Bridge.

In benchmark terms, the G645 achieves an Overall Score of 4395, ranking #1407 out of 2060 processors. Its Singlecore Score of 4461 places it at #1326, while its Multicore Score of 4297 lands at #1764. This indicates a relative strength in single-threaded performance compared to its multi-core capabilities, a common trait in older dual-core designs. It outperforms several modern low-power and mobile processors, such as the Intel Atom x5-E8000 and Celeron 3205U, but trails behind nearly all contemporary mainstream and high-end CPUs.

Compared to the top-tier processors of today, such as the Ryzen Threadripper PRO 9995WX or Core Ultra 9 285K, the G645 is far behind in performance—by orders of magnitude. However, within its own era and among budget CPUs, it holds its own, outperforming older dual-core designs like the Core 2 Duo P9600 and competing closely with other Pentium and Celeron variants from the early 2010s. As of March 2026, the Pentium G645 is best suited for light office use, basic multimedia tasks, and systems where cost and power consumption are prioritized over raw performance.
Frequently Compared

AMD EPYC 7402 30 views

AMD Ryzen Threadripper 2970WX 26 views

Intel Xeon E5-2620 v2 21 views

AMD Ryzen 5 3500X 20 views

Intel Pentium G2130 20 views

AMD Ryzen 9 PRO 3900 19 views

AMD Ryzen 5 PRO 3500U 19 views

Intel Xeon Silver 4114 19 views

AMD Ryzen 3 PRO 2200GE 18 views

Intel Xeon Silver 4210 15 views

Intel Pentium G645

Main Specifications

Designer: Intel
Name: Pentium G645
Model Number: G645
Cores: 2
Threads: 2
Base Frequency: 2900 MHz
Clock Multiplier: 29x (locked)
Core Name: Sandy Bridge
Socket: FCLGA1155
Package: FC-LGA10
Target Segment: Desktop
Max CPUs: 1
TDP: 65 W

Cache Specifications

L1 Cache: 62.464 KiB
L2 Cache: 0.244 MiB
L3 Cache: 2.861 MiB

Memory Specifications

Supported Memory Type: DDR3 1066
Memory Channels: 2
Maximum Memory: 0 GB
Maximum Bandwidth: 17 GB/s
ECC Support: Yes

PCI-Express Specifications

PCIe Revision: 2.0
PCIe Lanes: 12
PCIe Configuration: up to 1x16, 2x8, 1x8 & 2x4

Integrated Graphics

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

Physical Specifications

Process: 32 nm
Die Area: 131 mm²
Transistor Count: 0.00 billion
Manufacturer: Intel
Word Size: 64-bit

CPU Features

MMX SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX 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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