Celeron Dual-Core T3100 vs Phenom X3 8400

Celeron Dual-Core T3100 vs Phenom X3 8400 Performance Spectrum

Celeron Dual-Core T3100

2 / 2

1,174

+0.9%

1,164

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.

Celeron Dual-Core T3100 vs Phenom X3 8400 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.

Celeron Dual-Core T3100 vs Phenom X3 8400: Pros, Cons & Final Verdict

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

Celeron Dual-Core T3100

2009

Why buy it

✅+0.9% higher PassMark.
✅Draws 1W instead of 95W, a 94W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Phenom X3 8400

2008

Why buy it

Trade-offs

❌Lower PassMark (1,164 vs 1,174).
❌9400% higher power demand at 95W vs 1W.

Quick Answers

So, is Celeron Dual-Core T3100 better than Phenom X3 8400?

It depends on what you want from the system. For gaming, Phenom X3 8400 is ahead with a 0.3% average FPS lead across 27 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Celeron Dual-Core T3100 pulls ahead with 0.9% better PassMark.

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

For streaming, content creation, and heavier multitasking, Celeron Dual-Core T3100 is the stronger fit. You are getting 0.9% better PassMark, backed by 2 cores and 2 threads.

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

Celeron Dual-Core T3100 still makes the most sense overall. Celeron Dual-Core T3100 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 0.9% better PassMark.

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

Celeron Dual-Core T3100 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2008) and more multi-core headroom with 2 cores / 2 threads instead of 3/3. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Celeron Dual-Core T3100 vs Phenom X3 8400 Technical Specifications

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

Celeron Dual-Core T3100

The Celeron Dual-Core T3100 is manufactured by Intel. It was released in 2007-01-01. It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Max frequency: 1.9 GHz. L2 cache: 1 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 1 MB. Passmark benchmark score: 1,174 points. Launch price was $69.

Phenom X3 8400

The Phenom X3 8400 is manufactured by AMD. It was released in 2009-01-01. It is based on the Toliman (2008) architecture. It features 3 cores and 3 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): 95 Watt. Passmark benchmark score: 1,164 points. Launch price was $149.

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Processing Power

The Celeron Dual-Core T3100 packs 2 cores / 2 threads, while the Phenom X3 8400 offers 3 cores / 3 threads — the Phenom X3 8400 has 1 more core. Boost clocks reach 1.9 GHz on the Celeron Dual-Core T3100 versus 2.1 GHz on the Phenom X3 8400 — a 10% clock advantage for the Phenom X3 8400. The Celeron Dual-Core T3100 uses the Penryn (2008−2011) architecture (45 nm), while the Phenom X3 8400 uses Toliman (2008) (65 nm). In PassMark, the Celeron Dual-Core T3100 scores 1,174 against the Phenom X3 8400's 1,164 — a 0.9% lead for the Celeron Dual-Core T3100.

Feature	Celeron Dual-Core T3100	Phenom X3 8400
Cores / Threads	2 / 2	3 / 3+50%
Boost Clock	1.9 GHz	2.1 GHz+11%
L3 Cache	—	2 MB (total)
L2 Cache	1 MB+100%	512 kB (per core)
Process	45 nm-31%	65 nm
Architecture	Penryn (2008−2011)	Toliman (2008)
PassMark	1,174	1,164

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Memory & Platform

The Celeron Dual-Core T3100 uses the PGA478 socket (PCIe 1.1), while the Phenom X3 8400 uses AM2+ (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Celeron Dual-Core T3100	Phenom X3 8400
Socket	PGA478	AM2+
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 (Celeron Dual-Core T3100) / not specified (Phenom X3 8400). Primary use case: Celeron Dual-Core T3100 targets Budget. Direct competitor: Celeron Dual-Core T3100 rivals Pentium T4200.