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AMD Athlon II X4 645 Price, Specs & Reviews | TimeToPick

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AMD Athlon II X4 645

AMD

AMD Athlon II X4 645

AM3DDR34C / 4T95WPropus45nmEnd-of-life

Price

$0

CPU image not available yet

Full Specifications

Detailed architecture, platform, memory, and feature data for this CPU.

Total Cores4

Total Threads4

Base Clock3.10 GHz

BCLK / Multiplier200 MHz / 15.5xx

CodenamePropus

MicroarchitecturePropus

Process Node45nm

Die Size169.0 mm²

Transistors0.30 billion

Production StatusEnd-of-life

Market SegmentDesktop

Launch DateSep 21, 2010

Instruction Sets

MMX3DNow!SSESSE2SSE3SSE4AAMD64NX bitAMD-V

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1190 Multi-Core vs 1520

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1288 Multi-Core vs 1520

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AMD Athlon II X4 635

AMD Athlon II X4 635

1422 Multi-Core vs 1520

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AMD AMD Athlon II 160u 1.8 GHz Single-Core OEM/Tray Processor

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1 Cores vs 4

N/A

About This Product

The AMD Athlon II X4 645 is a quad-core desktop CPU from the Athlon II series, designed for the AM3 socket. With a base clock of 3.1 GHz, it offers basic multi-core performance suitable for general computing tasks and light productivity. Integrated graphics are dependent on the motherboard chipset, not the CPU itself. At its current price, it is an outdated option, significantly outperformed by modern entry-level CPUs in both single and multi-threaded applications.

Best for: Legacy system upgrade

Pros

Quad-core processing for basic multitasking
Compatible with AM3 motherboards
Low power consumption (95W TDP)

Cons

Outdated architecture and performance
No integrated graphics on CPU
Poor value compared to modern CPUs

Verdict
“Not recommended; modern budget CPUs offer superior performance and features for less or similar cost.”

Performance Benchmarks

Cross-source performance, value, and efficiency at a glance

Scores are grouped by benchmark family so it is easy to compare raw speed, threaded output, and real-world value without mixing scales.

Cinebench R23Cinebench 2024Geekbench 6PassMark

Render Workloads

Cinebench R23

Single-Core

40217%

Multi-Core

1,5203%

Next-Gen Scale

Cinebench 2024

Single-Core

00%

Multi-Core

00%

Cross-Platform

Geekbench 6

Single-Core

31710%

Multi-Core

9464%

Based on 24 user submissions.

Large Sample Pool

PassMark

Overall

6451%

Single-Thread

77315%

PassMark rank: #4,956

Value & Efficiency

How much output you get per watt and per dollar

These derived metrics use Cinebench R23 multi-core performance to keep the value calculation consistent across the catalog.

Performance per Watt

16.0 pts/W

Performance per Dollar

22.3 pts/$

Popular Comparisons

Most people compare Athlon II X4 645 with

These pairings are pre-ranked from the comparison engine so readers can jump straight into the most relevant alternatives.

Core i5-3210M

Closest Rival

vs Intel Core i5-3210M

Multi-core 1,431 · $48

"29% slower single-core, 6% better multi-core, $19 more expensive"

Upgrade Verdict

This is a significant downgrade. The Core i5-3210M is a laptop CPU with fewer cores and lower performance than your desktop Athlon II X4 645. Do not make this change.

Full Compare→

Xeon X3440

Budget Alternative

vs Intel Xeon X3440

Multi-core 2,256 · $17

"12% slower single-core, 33% slower multi-core, $65 more expensive"

Upgrade Verdict

This is a meaningful jump, especially for multi-threaded tasks, thanks to Hyper-Threading. However, it requires a new motherboard and RAM, making the $2.99 CPU price misleading for a full platform switch.

Full Compare→

Athlon II X4 635

Upgrade From

vs AMD Athlon II X4 635

Multi-core 1,422 · $27

"7% better single-core, 7% better multi-core, similar price"

Upgrade Verdict

This is a sidegrade. The Athlon II X4 645 and 635 are nearly identical in performance, with the 645 having a slightly higher clock speed. It's not worth the cost or effort to upgrade.

Full Compare→

Compatible Motherboards (3)

See full guide →

MSI 880GMS-E35

880GMicro-ATX

N/A

ASUS Crosshair IV Extreme

AMD 890FXE-ATX

N/A

ASUS M4N68T-M V2

Micro-ATX

N/A

Compatible RAM (3722)

See full guide →

Mushkin Blackline 16 GB

2x8GBDDR3-1600

N/A

Mushkin Blackline 16 GB

2x8GBDDR3-2400

N/A

Mushkin Blackline 16 GB

2x8GBDDR3-2400

N/A

Mushkin Blackline 16 GB

2x8GBDDR3-2133

N/A

Compatible CPU Coolers (523)

DeepCool CAPTAIN 120

AIO 120mm39.3 dBA

$12.99

Evercool EC-NK804A-925EP

Air56mm28.2 dBA

N/A

ARCTIC Alpine AM4 CO

Air69mm

$17.99

SilenX EFZ-92HA2

Air56mm24.0 dBA

N/A

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