Pentium Dual Core T4300 vs Phenom II X2 B55

Pentium Dual Core T4300 vs Phenom II X2 B55 Performance Spectrum

Pentium Dual Core T4300

2 / 2

1,232

+0.8%

1,222

0.0%

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 Dual Core T4300 vs Phenom II X2 B55 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 Dual Core T4300 vs Phenom II X2 B55: Pros, Cons & Final Verdict

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

Pentium Dual Core T4300

2009

Why buy it

✅+0.8% higher PassMark.
✅Draws 35W instead of 80W, a 45W reduction.

Trade-offs

❌Launch MSRP is still $150 MSRP, while Phenom II X2 B55 mostly shows up through inconsistent older-market listings.

Phenom II X2 B55

2009

Why buy it

Trade-offs

❌Lower PassMark (1,222 vs 1,232).
❌128.6% higher power demand at 80W vs 35W.

Quick Answers

So, is Pentium Dual Core T4300 better than Phenom II X2 B55?

It depends on what you want from the system. For gaming, Phenom II X2 B55 is ahead with a 1.9% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Pentium Dual Core T4300 pulls ahead with 0.8% better PassMark.

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

For streaming, content creation, and heavier multitasking, Pentium Dual Core T4300 is the stronger fit. You are getting 0.8% better PassMark, backed by 2 cores and 2 threads.

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

Pentium Dual Core T4300 is the better buy right now. Pentium Dual Core T4300 comes in at an unclear MSRP at $150 MSRP versus unclear MSRP, and it still gives you 0.8% better PassMark. The compromise is that Phenom II X2 B55 is still the better pure gaming CPU with a 1.9% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (8.2 vs 0.0 PassMark/$), 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 Dual Core T4300 makes more sense long term for 2026 and beyond. You are getting more multi-core headroom with 2 cores / 2 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Pentium Dual Core T4300 vs Phenom II X2 B55 Technical Specifications

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

Pentium Dual Core T4300

The Pentium Dual Core T4300 is manufactured by Intel. It was released in 2007-01-01. It is based on the NetBurst (2000−2006) architecture. It features 2 cores and 2 threads. Base frequency is 2.1 GHz, with boost up to 2.1 GHz. L3 cache: 0 kB. L2 cache: 1 MB. Built on 45 nm process technology. Socket: P. Thermal design power (TDP): 35 Watt. Memory support: DDR3. Passmark benchmark score: 1,232 points. Launch price was $69.

Phenom II X2 B55

The Phenom II X2 B55 is manufactured by AMD. It was released in 1 October 2009 (16 years ago). It is based on the Callisto (2009−2010) architecture. It features 2 cores and 2 threads. Base frequency is 3 GHz, with boost up to 3 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 1,222 points. Launch price was $48.

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Processing Power

Both the Pentium Dual Core T4300 and Phenom II X2 B55 share an identical 2-core/2-thread configuration. Boost clocks reach 2.1 GHz on the Pentium Dual Core T4300 versus 3 GHz on the Phenom II X2 B55 — a 35.3% clock advantage for the Phenom II X2 B55 (base: 2.1 GHz vs 3 GHz). The Pentium Dual Core T4300 uses the NetBurst (2000−2006) architecture (45 nm), while the Phenom II X2 B55 uses Callisto (2009−2010) (45 nm). In PassMark, the Pentium Dual Core T4300 scores 1,232 against the Phenom II X2 B55's 1,222 — a 0.8% lead for the Pentium Dual Core T4300. L3 cache: 0 kB on the Pentium Dual Core T4300 vs 6 MB (total) on the Phenom II X2 B55.

Feature	Pentium Dual Core T4300	Phenom II X2 B55
Cores / Threads	2 / 2	2 / 2
Boost Clock	2.1 GHz	3 GHz+43%
Base Clock	2.1 GHz	3 GHz+43%
L3 Cache	0 kB	6 MB (total)
L2 Cache	1 MB+100%	512 kB (per core)
Process	45 nm	45 nm
Architecture	NetBurst (2000−2006)	Callisto (2009−2010)
PassMark	1,232	1,222

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Memory & Platform

The Pentium Dual Core T4300 uses the P socket (PCIe 1.1), while the Phenom II X2 B55 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Pentium Dual Core T4300	Phenom II X2 B55
Socket	P	AM3
PCIe Generation	PCIe 1.1	PCIe 2.0+82%
Max RAM Speed	DDR3-800	—
Max RAM Capacity	8 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	0	—

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Advanced Features

Virtualization: No VT-x (Pentium Dual Core T4300) / not specified (Phenom II X2 B55). Primary use case: Pentium Dual Core T4300 targets Mobile.