Core 2 Duo T6670 vs Pentium Gold 5405U

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 Pentium Gold 5405U 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 Pentium Gold 5405U: 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

✅+0.3% higher PassMark.
✅Draws 2W instead of 15W, a 13W reduction.

Trade-offs

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

Pentium Gold 5405U

2019

Why buy it

Trade-offs

❌Lower PassMark (2,357 vs 2,365).
❌650% higher power demand at 15W vs 2W.

Quick Answers

So, is Core 2 Duo T6670 better than Pentium Gold 5405U?

It depends on what you want from the system. For gaming, Pentium Gold 5405U is ahead with a 1.8% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core 2 Duo T6670 pulls ahead with 0.3% better PassMark.

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

For streaming, content creation, and heavier multitasking, Core 2 Duo T6670 is the stronger fit. You are getting 0.3% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Duo T6670 still makes the most sense overall. Core 2 Duo T6670 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 0.3% better PassMark.

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

Pentium Gold 5405U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2009). That makes it the safer long-term bet.

Core 2 Duo T6670 vs Pentium Gold 5405U 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.

Pentium Gold 5405U

The Pentium Gold 5405U is manufactured by Intel. It was released in 23 January 2019 (6 years ago). It is based on the Whiskey Lake-U (2018−2019) architecture. It features 2 cores and 4 threads. Base frequency is 2.3 GHz, with boost up to 2.3 GHz. L3 cache: 2 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: FCBGA1528. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 2,357 points. Launch price was $161.

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Processing Power

The Core 2 Duo T6670 packs 2 cores / 2 threads, matching the Pentium Gold 5405U's 2 cores. Boost clocks reach 2.2 GHz on the Core 2 Duo T6670 versus 2.3 GHz on the Pentium Gold 5405U — a 4.4% clock advantage for the Pentium Gold 5405U (base: 2.2 GHz vs 2.3 GHz). The Core 2 Duo T6670 uses the Penryn (2008−2011) architecture (45 nm), while the Pentium Gold 5405U uses Whiskey Lake-U (2018−2019) (14 nm). In PassMark, the Core 2 Duo T6670 scores 2,365 against the Pentium Gold 5405U's 2,357 — a 0.3% lead for the Core 2 Duo T6670. L3 cache: 2 MB L2 Cache on the Core 2 Duo T6670 vs 2 MB (total) on the Pentium Gold 5405U.

Feature	Core 2 Duo T6670	Pentium Gold 5405U
Cores / Threads	2 / 2	2 / 4
Boost Clock	2.2 GHz	2.3 GHz+5%
Base Clock	2.2 GHz	2.3 GHz+5%
L3 Cache	2 MB L2 Cache	2 MB (total)
L2 Cache	2 MB+700%	256 kB (per core)
Process	45 nm	14 nm-69%
Architecture	Penryn (2008−2011)	Whiskey Lake-U (2018−2019)
PassMark	2,365	2,357
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 Pentium Gold 5405U uses FCBGA1528 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core 2 Duo T6670	Pentium Gold 5405U
Socket	PGA478	FCBGA1528
PCIe Generation	PCIe 1.1	PCIe 3.0+173%
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 (Pentium Gold 5405U). Primary use case: Core 2 Duo T6670 targets Budget. Direct competitor: Core 2 Duo T6670 rivals Core 2 Duo T6600.