Core 2 Quad Q9400 vs Core i5-3437U

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 Quad Q9400 vs Core i5-3437U 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 Quad Q9400 vs Core i5-3437U: 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 Quad Q9400

2008

Why buy it

✅Draws 95W instead of 512W, a 417W reduction.

Trade-offs

❌Lower PassMark (2,160 vs 2,166).
❌Launch MSRP is still $229 MSRP, while Core i5-3437U mostly shows up through inconsistent older-market listings.
❌No integrated graphics, while Core i5-3437U can still boot and troubleshoot without a discrete GPU.

Core i5-3437U

2013

Why buy it

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel HD Graphics 4000, while Core 2 Quad Q9400 needs a discrete GPU.

Trade-offs

❌438.9% higher power demand at 512W vs 95W.

Quick Answers

So, is Core i5-3437U better than Core 2 Quad Q9400?

Yes. Core i5-3437U is the better all-around CPU here. It gives you a 1.8% average FPS lead across 50 shared CPU game tests in our data, 0.3% 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, Core i5-3437U is the better pick. According to our tests, it delivers 1.8% 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, Core i5-3437U is the stronger fit. You are getting 0.3% better PassMark, backed by 2 cores and 4 threads.

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

Core i5-3437U is still the much better call for a fresh build. Core i5-3437U comes in at an unclear MSRP at unclear MSRP versus $229 MSRP, and it still gives you a 1.8% average FPS lead across 50 shared CPU game tests in our data. Core 2 Quad Q9400 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2008 platform. Even with 100.0% better value on paper (9.4 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA775.

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

Core i5-3437U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2013 vs 2008) and more multi-core headroom with 2 cores / 4 threads instead of 4/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core 2 Quad Q9400 vs Core i5-3437U Technical Specifications

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

Core 2 Quad Q9400

The Core 2 Quad Q9400 is manufactured by Intel. It was released in 2008-01-01. It is based on the Yorkfield (2007−2009) architecture. It features 4 cores and 4 threads. Base frequency is 2.66 GHz, with boost up to 2.67 GHz. L3 cache: 0 kB. L2 cache: 6 MB (total). Built on 45 nm process technology. Socket: LGA775. Thermal design power (TDP): 95 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 2,160 points. Launch price was $249.

Core i5-3437U

The Core i5-3437U is manufactured by Intel. It was released in 1 January 2013 (12 years ago). It is based on the Ivy Bridge (2012−2013) architecture. It features 2 cores and 4 threads. Base frequency is 1.9 GHz, with boost up to 2.9 GHz. L3 cache: 3 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: BGA1023. Thermal design power (TDP): 17 Watt. Memory support: DDR3. Passmark benchmark score: 2,166 points. Launch price was $69.

⚡

Processing Power

The Core 2 Quad Q9400 packs 4 cores / 4 threads, while the Core i5-3437U offers 2 cores / 4 threads — the Core 2 Quad Q9400 has 2 more cores. Boost clocks reach 2.67 GHz on the Core 2 Quad Q9400 versus 2.9 GHz on the Core i5-3437U — a 8.3% clock advantage for the Core i5-3437U (base: 2.66 GHz vs 1.9 GHz). The Core 2 Quad Q9400 uses the Yorkfield (2007−2009) architecture (45 nm), while the Core i5-3437U uses Ivy Bridge (2012−2013) (22 nm). In PassMark, the Core 2 Quad Q9400 scores 2,160 against the Core i5-3437U's 2,166 — a 0.3% lead for the Core i5-3437U. L3 cache: 0 kB on the Core 2 Quad Q9400 vs 3 MB (total) on the Core i5-3437U.

Feature	Core 2 Quad Q9400	Core i5-3437U
Cores / Threads	4 / 4+100%	2 / 4
Boost Clock	2.67 GHz	2.9 GHz+9%
Base Clock	2.66 GHz+40%	1.9 GHz
L3 Cache	0 kB	3 MB (total)
L2 Cache	6 MB (total)	256K (per core)+4167%
Process	45 nm	22 nm-51%
Architecture	Yorkfield (2007−2009)	Ivy Bridge (2012−2013)
PassMark	2,160	2,166
Geekbench 6 Single	—	440
Geekbench 6 Multi	—	1,080

🧠

Memory & Platform

The Core 2 Quad Q9400 uses the LGA775 socket (PCIe 1.1), while the Core i5-3437U uses BGA1023 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1066 on the Core 2 Quad Q9400 versus DDR3-1600 on the Core i5-3437U — the Core i5-3437U supports 50.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-3437U supports up to 32 GB of RAM compared to 8 GB — 300% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Core 2 Quad Q9400) vs 16 (Core i5-3437U) — the Core i5-3437U offers 16 more lanes for additional GPUs or NVMe drives.

Feature	Core 2 Quad Q9400	Core i5-3437U
Socket	LGA775	BGA1023
PCIe Generation	PCIe 1.1	PCIe 3.0+173%
Max RAM Speed	DDR3-1066	DDR3-1600+50%
Max RAM Capacity	8 GB	32 GB+300%
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	0	16

🔧

Advanced Features

Neither processor supports overclocking. Virtualization support: VT-x (Core 2 Quad Q9400) vs VT-x, VT-d (Core i5-3437U). The Core i5-3437U includes integrated graphics (Intel HD Graphics 4000), while the Core 2 Quad Q9400 requires a dedicated GPU. Primary use case: Core 2 Quad Q9400 targets Desktop, Core i5-3437U targets Business Ultrabook. Direct competitor: Core i5-3437U rivals AMD A8-4555M.