Core 2 Duo T6600 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 T6600 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 T6600 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 T6600

2009

Why buy it

✅Draws 2W instead of 15W, a 13W reduction.

Trade-offs

❌Lower PassMark (2,355 vs 2,357).

Pentium Gold 5405U

2019

Why buy it

Trade-offs

❌650% higher power demand at 15W vs 2W.

Quick Answers

So, is Pentium Gold 5405U better than Core 2 Duo T6600?

Yes. Pentium Gold 5405U is the better all-around CPU here. It gives you a 2.2% 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, Pentium Gold 5405U is the better pick. According to our tests, it delivers 2.2% 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, Pentium Gold 5405U is the stronger fit. You are getting 0.1% better PassMark, backed by 2 cores and 4 threads.

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

Pentium Gold 5405U still makes the most sense overall. Pentium Gold 5405U comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 2.2% average FPS lead across 50 shared CPU game tests in our data.

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) and more multi-core headroom with 2 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 T6600 vs Pentium Gold 5405U Technical Specifications

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

Core 2 Duo T6600

The Core 2 Duo T6600 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: 2,355 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.

⚡

Processing Power

The Core 2 Duo T6600 packs 2 cores / 2 threads, matching the Pentium Gold 5405U's 2 cores. Boost clocks reach 2.2 GHz on the Core 2 Duo T6600 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 T6600 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 T6600 scores 2,355 against the Pentium Gold 5405U's 2,357 — a 0.1% lead for the Pentium Gold 5405U. L3 cache: 2 MB L2 Cache on the Core 2 Duo T6600 vs 2 MB (total) on the Pentium Gold 5405U.

Feature	Core 2 Duo T6600	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	2,355	2,357
Geekbench 6 Single	200	—
Geekbench 6 Multi	350	—

🧠

Memory & Platform

The Core 2 Duo T6600 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 T6600	Pentium Gold 5405U
Socket	PGA478	FCBGA1528
PCIe Generation	PCIe 1.1	PCIe 3.0+173%
Max RAM Speed	DDR3-800	—
Max RAM Capacity	8 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	0	—

🔧

Advanced Features

Virtualization: VT-x (Core 2 Duo T6600) / not specified (Pentium Gold 5405U). Primary use case: Core 2 Duo T6600 targets Legacy Laptop.