Pentium G645 vs Phenom X4 9450e

Pentium G645 vs Phenom X4 9450e Performance Spectrum

Pentium G645

2 / 2

1,450

0.0%

1,455

+0.3%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

About PassMark

PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.

Pentium G645 vs Phenom X4 9450e FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Pentium G645 vs Phenom X4 9450e: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Pentium G645

2012

Why buy it

✅+50% larger total L3 cache (3 MB vs 2 MB).
✅Costs $370 less on MSRP ($80 MSRP vs $450 MSRP).
✅Delivers 460.6% more PassMark for each dollar spent, at 18.1 vs 3.2 PassMark/$ ($80 MSRP vs $450 MSRP).

Trade-offs

❌Lower PassMark (1,450 vs 1,455).

Phenom X4 9450e

2008

Why buy it

✅+0.3% higher PassMark.

Trade-offs

❌Smaller total L3 cache (2 MB vs 3 MB).
❌Lower PassMark per dollar, at 3.2 vs 18.1 PassMark/$ ($450 MSRP vs $80 MSRP).

Quick Answers

So, is Pentium G645 better than Phenom X4 9450e?

It depends on what you want from the system. For gaming, Pentium G645 is ahead with a 0.4% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Phenom X4 9450e pulls ahead with 0.3% better PassMark. Pentium G645 also has the bigger cache pool with 50% larger total L3 cache (3 MB vs 2 MB).

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Phenom X4 9450e is the stronger fit. You are getting 0.3% better PassMark, backed by 4 cores and 4 threads.

Which one is the smarter buy today, not just the cheaper CPU?

Pentium G645 is the better buy right now. Pentium G645 comes in $370 cheaper on MSRP at $80 MSRP versus $450 MSRP, and it still gives you a 0.4% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Phenom X4 9450e is still stronger for heavier multi-core work with 0.3% better PassMark. It is also 460.6% better value on MSRP (18.1 vs 3.2 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

Which one is more future-proof for 2026 and beyond?

Pentium G645 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2012 vs 2008) and 50% larger total L3 cache (3 MB vs 2 MB). That makes it the safer long-term bet.

Pentium G645 vs Phenom X4 9450e Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

Pentium G645

The Pentium G645 is manufactured by Intel. It was released in 2 September 2012 (13 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 2 threads. Base frequency is 2.9 GHz, with boost up to 2.9 GHz. L3 cache: 3 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1155. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 1,450 points. Launch price was $80.

Phenom X4 9450e

The Phenom X4 9450e is manufactured by AMD. It was released in 2009-01-01. It is based on the Agena (2007−2008) architecture. It features 4 cores and 4 threads. Max frequency: 2.1 GHz. L3 cache: 2 MB (total). L2 cache: 512 kB (per core). Built on 65 nm process technology. Socket: AM2+. Thermal design power (TDP): 65 Watt. Passmark benchmark score: 1,455 points. Launch price was $149.

⚡

Processing Power

The Pentium G645 packs 2 cores / 2 threads, while the Phenom X4 9450e offers 4 cores / 4 threads — the Phenom X4 9450e has 2 more cores. Boost clocks reach 2.9 GHz on the Pentium G645 versus 2.1 GHz on the Phenom X4 9450e — a 32% clock advantage for the Pentium G645. The Pentium G645 uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Phenom X4 9450e uses Agena (2007−2008) (65 nm). In PassMark, the Pentium G645 scores 1,450 against the Phenom X4 9450e's 1,455 — a 0.3% lead for the Phenom X4 9450e. L3 cache: 3 MB (total) on the Pentium G645 vs 2 MB (total) on the Phenom X4 9450e.

Feature	Pentium G645	Phenom X4 9450e
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	2.9 GHz+38%	2.1 GHz
Base Clock	2.9 GHz	—
L3 Cache	3 MB (total)+50%	2 MB (total)
L2 Cache	256 kB (per core)	512 kB (per core)+100%
Process	32 nm-51%	65 nm
Architecture	Sandy Bridge (2011−2013)	Agena (2007−2008)
PassMark	1,450	1,455

🧠

Memory & Platform

The Pentium G645 uses the LGA1155 socket (PCIe 2.0), while the Phenom X4 9450e uses AM2+ (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Pentium G645	Phenom X4 9450e
Socket	LGA1155	AM2+
PCIe Generation	PCIe 2.0	PCIe 2.0

💰

Value Analysis

At launch, the Pentium G645 was priced at $80, while the Phenom X4 9450e came in at $450. On launch pricing ($80 vs $450), Pentium G645 was $370 cheaper. In terms of value on MSRP (PassMark points per dollar), the Pentium G645 delivers 18.1 pts/$ vs 3.2 pts/$ for the Phenom X4 9450e — making the Pentium G645 the 139.4% better value option.

Feature	Pentium G645	Phenom X4 9450e
MSRP	$80-82%	$450
Performance per Dollar	18.1+466%	3.2
Release Date	2012	2008

Search Pentium G645 on Amazon

Search Phenom X4 9450e on Amazon

Affiliate Disclosure

ChipVERSUS is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We may earn a commission on qualifying purchases made through our links. This comes at no additional cost to you and helps support our work in providing comprehensive PC building guides and tools.

Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates.