Core 2 Duo SL9400 vs Pentium 4405U

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 SL9400 vs Pentium 4405U 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 SL9400 vs Pentium 4405U: 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 SL9400

2008

Why buy it

✅+1% higher PassMark.
✅+200% larger total L3 cache (6 MB vs 2 MB).
✅Draws 6W instead of 512W, a 506W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $284 MSRP, while Pentium 4405U mostly shows up through inconsistent older-market listings.

Pentium 4405U

2015

Why buy it

Trade-offs

❌Lower PassMark (2,122 vs 2,144).
❌Smaller total L3 cache (2 MB vs 6 MB).
❌8433.3% higher power demand at 512W vs 6W.

Quick Answers

So, is Core 2 Duo SL9400 better than Pentium 4405U?

It depends on what you want from the system. For gaming, Pentium 4405U is ahead with a 0.3% average FPS lead across 49 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core 2 Duo SL9400 pulls ahead with 1% better PassMark. Core 2 Duo SL9400 also has the bigger cache pool with 200% larger total L3 cache (6 MB vs 2 MB).

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

For streaming, content creation, and heavier multitasking, Core 2 Duo SL9400 is the stronger fit. You are getting 1% better PassMark, backed by 2 cores and 2 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?

Core 2 Duo SL9400 is the better buy right now. Core 2 Duo SL9400 comes in at an unclear MSRP at $284 MSRP versus unclear MSRP, and it still gives you 1% better PassMark. The compromise is that Pentium 4405U is still the better pure gaming CPU with a 0.3% average FPS lead across 49 shared CPU game tests in our data. It is also 100.0% better value on MSRP (7.5 vs 0.0 PassMark/$), 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 4405U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2008). That makes it the safer long-term bet.

Core 2 Duo SL9400 vs Pentium 4405U Technical Specifications

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

Core 2 Duo SL9400

The Core 2 Duo SL9400 is manufactured by Intel. It was released in 20 August 2008 (17 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 1.86 GHz, with boost up to 1.86 GHz. L3 cache: 6 MB L2 Cache. L2 cache: 6 MB. Built on 45 nm process technology. Socket: BGA956. Thermal design power (TDP): 17 Watt. Passmark benchmark score: 2,144 points. Launch price was $284.

Pentium 4405U

The Pentium 4405U is manufactured by Intel. It was released in 1 September 2015 (10 years ago). It is based on the NetBurst (2000−2006) architecture. It features 2 cores and 4 threads. Base frequency is 2.1 GHz, with boost up to 2.1 GHz. L3 cache: 2 MB. L2 cache: 512 kB. Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 2,122 points. Launch price was $161.

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Processing Power

The Core 2 Duo SL9400 packs 2 cores / 2 threads, matching the Pentium 4405U's 2 cores. Boost clocks reach 1.86 GHz on the Core 2 Duo SL9400 versus 2.1 GHz on the Pentium 4405U — a 12.1% clock advantage for the Pentium 4405U (base: 1.86 GHz vs 2.1 GHz). The Core 2 Duo SL9400 uses the Penryn (2008−2011) architecture (45 nm), while the Pentium 4405U uses NetBurst (2000−2006) (14 nm). In PassMark, the Core 2 Duo SL9400 scores 2,144 against the Pentium 4405U's 2,122 — a 1% lead for the Core 2 Duo SL9400. L3 cache: 6 MB L2 Cache on the Core 2 Duo SL9400 vs 2 MB on the Pentium 4405U.

Feature	Core 2 Duo SL9400	Pentium 4405U
Cores / Threads	2 / 2	2 / 4
Boost Clock	1.86 GHz	2.1 GHz+13%
Base Clock	1.86 GHz	2.1 GHz+13%
L3 Cache	6 MB L2 Cache+200%	2 MB
L2 Cache	6 MB+1100%	512 kB
Process	45 nm	14 nm-69%
Architecture	Penryn (2008−2011)	NetBurst (2000−2006)
PassMark	2,144+1%	2,122

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Memory & Platform

The Core 2 Duo SL9400 uses the BGA956 socket (PCIe 1.1), while the Pentium 4405U uses BGA1356 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core 2 Duo SL9400	Pentium 4405U
Socket	BGA956	BGA1356
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	16	—