Core 2 Duo T6670 vs Phenom II X4 840T

Core 2 Duo T6670 vs Phenom II X4 840T Performance Spectrum

Core 2 Duo T6670

2 / 2

2,365

0.0%

2,367

+0.1%

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.

Core 2 Duo T6670 vs Phenom II X4 840T 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.

Core 2 Duo T6670 vs Phenom II X4 840T: Pros, Cons & Final Verdict

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

Core 2 Duo T6670

2009

Why buy it

✅Draws 2W instead of 95W, a 93W reduction.

Trade-offs

❌Lower PassMark (2,365 vs 2,367).
❌Smaller total L3 cache (2 MB vs 6 MB).

Phenom II X4 840T

2010

Why buy it

✅+200% larger total L3 cache (6 MB vs 2 MB).

Trade-offs

❌4650% higher power demand at 95W vs 2W.

Quick Answers

So, is Phenom II X4 840T better than Core 2 Duo T6670?

Yes. Phenom II X4 840T is the better all-around CPU here. It gives you a 1.5% average FPS lead across 50 shared CPU game tests in our data, 0.1% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Phenom II X4 840T is the better pick. According to our tests, it delivers 1.5% more average FPS across 50 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Phenom II X4 840T is the stronger fit. You are getting 0.1% better PassMark, backed by 4 cores and 4 threads. It also has the larger cache pool with 200% larger total L3 cache (6 MB vs 2 MB).

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

Phenom II X4 840T still makes the most sense overall. Phenom II X4 840T comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 1.5% average FPS lead across 50 shared CPU game tests in our data.

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

Phenom II X4 840T makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2010 vs 2009), 200% larger total L3 cache (6 MB vs 2 MB), and more multi-core headroom with 4 cores / 4 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core 2 Duo T6670 vs Phenom II X4 840T Technical Specifications

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

Core 2 Duo T6670

The Core 2 Duo T6670 is manufactured by Intel. It was released in 2008-01-01. It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.2 GHz, with boost up to 2.2 GHz. L3 cache: 2 MB L2 Cache. L2 cache: 2 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 2,365 points. Launch price was $249.

Phenom II X4 840T

The Phenom II X4 840T is manufactured by AMD. It was released in 1 September 2010 (15 years ago). It is based on the Zosma (2010−2011) architecture. It features 4 cores and 4 threads. Base frequency is 2.9 GHz, with boost up to 3.2 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 2,367 points. Launch price was $80.

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Processing Power

The Core 2 Duo T6670 packs 2 cores / 2 threads, while the Phenom II X4 840T offers 4 cores / 4 threads — the Phenom II X4 840T has 2 more cores. Boost clocks reach 2.2 GHz on the Core 2 Duo T6670 versus 3.2 GHz on the Phenom II X4 840T — a 37% clock advantage for the Phenom II X4 840T (base: 2.2 GHz vs 2.9 GHz). The Core 2 Duo T6670 uses the Penryn (2008−2011) architecture (45 nm), while the Phenom II X4 840T uses Zosma (2010−2011) (45 nm). In PassMark, the Core 2 Duo T6670 scores 2,365 against the Phenom II X4 840T's 2,367 — a 0.1% lead for the Phenom II X4 840T. L3 cache: 2 MB L2 Cache on the Core 2 Duo T6670 vs 6 MB (total) on the Phenom II X4 840T.

Feature	Core 2 Duo T6670	Phenom II X4 840T
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	2.2 GHz	3.2 GHz+45%
Base Clock	2.2 GHz	2.9 GHz+32%
L3 Cache	2 MB L2 Cache	6 MB (total)+200%
L2 Cache	2 MB+300%	512 kB (per core)
Process	45 nm	45 nm
Architecture	Penryn (2008−2011)	Zosma (2010−2011)
PassMark	2,365	2,367
Geekbench 6 Single	252	—
Geekbench 6 Multi	252	—

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Memory & Platform

The Core 2 Duo T6670 uses the PGA478 socket (PCIe 1.1), while the Phenom II X4 840T uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Core 2 Duo T6670	Phenom II X4 840T
Socket	PGA478	AM3
PCIe Generation	PCIe 1.1	PCIe 2.0+82%
Max RAM Speed	DDR3-1066	—
Max RAM Capacity	8 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	0	—

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Advanced Features

Virtualization: VT-x (Core 2 Duo T6670) / not specified (Phenom II X4 840T). Primary use case: Core 2 Duo T6670 targets Budget. Direct competitor: Core 2 Duo T6670 rivals Core 2 Duo T6600.