Pentium G645 vs Phenom II X3 700e

CPU

GPU

Pentium G645

2 Cores2 Thrd65 WWMax: 2.9 GHz2012

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Phenom II X3 700e

3 Cores3 Thrd65 WWMax: 2.4 GHz2009

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Pentium G645 vs Phenom II X3 700e Performance Spectrum

Pentium G645

2 / 2

1,450

0.0%

1,451

+0.1%

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 II X3 700e 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 II X3 700e: 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

✅Costs $45 less on MSRP ($80 MSRP vs $125 MSRP).
✅Delivers 56.1% more PassMark for each dollar spent, at 18.1 vs 11.6 PassMark/$ ($80 MSRP vs $125 MSRP).

Trade-offs

❌Lower PassMark (1,450 vs 1,451).
❌Smaller total L3 cache (3 MB vs 6 MB).

Phenom II X3 700e

2009

Why buy it

✅+0.1% higher PassMark.
✅+100% larger total L3 cache (6 MB vs 3 MB).
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark per dollar, at 11.6 vs 18.1 PassMark/$ ($125 MSRP vs $80 MSRP).

Quick Answers

So, is Pentium G645 better than Phenom II X3 700e?

It depends on what you want from the system. For gaming, Pentium G645 is ahead with a 0.7% average FPS lead across 46 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Phenom II X3 700e pulls ahead with 0.1% better PassMark. Phenom II X3 700e also has the bigger cache pool with 100% larger total L3 cache (6 MB vs 3 MB).

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

For streaming, content creation, and heavier multitasking, Phenom II X3 700e is the stronger fit. You are getting 0.1% better PassMark, backed by 3 cores and 3 threads. It also has the larger cache pool with 100% larger total L3 cache (6 MB vs 3 MB).

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

Pentium G645 is the better buy right now. Pentium G645 comes in $45 cheaper on MSRP at $80 MSRP versus $125 MSRP, and it still gives you a 0.7% average FPS lead across 46 shared CPU game tests in our data. The compromise is that Phenom II X3 700e is still stronger for heavier multi-core work with 0.1% better PassMark. It is also 56.1% better value on MSRP (18.1 vs 11.6 PassMark/$), 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 2009). That makes it the safer long-term bet.

Pentium G645 vs Phenom II X3 700e 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 II X3 700e

The Phenom II X3 700e is manufactured by AMD. It was released in 2009-01-01. It is based on the Heka (2009−2010) architecture. It features 3 cores and 3 threads. Base frequency is 2.4 GHz, with boost up to 2.4 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 1,451 points. Launch price was $149.

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Processing Power

The Pentium G645 packs 2 cores / 2 threads, while the Phenom II X3 700e offers 3 cores / 3 threads — the Phenom II X3 700e has 1 more core. Boost clocks reach 2.9 GHz on the Pentium G645 versus 2.4 GHz on the Phenom II X3 700e — a 18.9% clock advantage for the Pentium G645 (base: 2.9 GHz vs 2.4 GHz). The Pentium G645 uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Phenom II X3 700e uses Heka (2009−2010) (45 nm). In PassMark, the Pentium G645 scores 1,450 against the Phenom II X3 700e's 1,451 — a 0.1% lead for the Phenom II X3 700e. L3 cache: 3 MB (total) on the Pentium G645 vs 6 MB (total) on the Phenom II X3 700e.

Feature	Pentium G645	Phenom II X3 700e
Cores / Threads	2 / 2	3 / 3+50%
Boost Clock	2.9 GHz+21%	2.4 GHz
Base Clock	2.9 GHz+21%	2.4 GHz
L3 Cache	3 MB (total)	6 MB (total)+100%
L2 Cache	256 kB (per core)	512 kB (per core)+100%
Process	32 nm-29%	45 nm
Architecture	Sandy Bridge (2011−2013)	Heka (2009−2010)
PassMark	1,450	1,451
Geekbench 6 Single	—	250
Geekbench 6 Multi	—	650

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Memory & Platform

The Pentium G645 uses the LGA1155 socket (PCIe 2.0), while the Phenom II X3 700e uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Pentium G645	Phenom II X3 700e
Socket	LGA1155	AM3
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	—	DDR3-1333
Max RAM Capacity	—	16 GB
RAM Channels	—	2
ECC Support	—	Yes
PCIe Lanes	—	16

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Advanced Features

Virtualization: not specified (Pentium G645) / AMD-V (Phenom II X3 700e). Primary use case: Phenom II X3 700e targets Legacy Desktop.

Feature	Pentium G645	Phenom II X3 700e
Integrated GPU	—	No
IGPU Model	—	None
Unlocked	—	Yes
AVX-512	—	No
Virtualization	—	AMD-V
Target Use	—	Legacy Desktop

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Value Analysis

At launch, the Pentium G645 was priced at $80, while the Phenom II X3 700e came in at $125. On launch pricing ($80 vs $125), Pentium G645 was $45 cheaper. In terms of value on MSRP (PassMark points per dollar), the Pentium G645 delivers 18.1 pts/$ vs 11.6 pts/$ for the Phenom II X3 700e — making the Pentium G645 the 43.8% better value option.

Feature	Pentium G645	Phenom II X3 700e
MSRP	$80-36%	$125
Performance per Dollar	18.1+56%	11.6
Release Date	2012	2009

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