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.

Celeron G3900 vs Core 2 Quad Q9400 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.

Celeron G3900 vs Core 2 Quad Q9400: Pros, Cons & Final Verdict

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

Celeron G3900

2015

Why buy it

✅Costs $187 less on MSRP ($42 MSRP vs $229 MSRP).
✅Delivers 444.0% more PassMark for each dollar spent, at 51.3 vs 9.4 PassMark/$ ($42 MSRP vs $229 MSRP).
✅Draws 51W instead of 95W, a 44W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel HD Graphics 510, while Core 2 Quad Q9400 needs a discrete GPU.

Trade-offs

❌Lower PassMark (2,155 vs 2,160).

Core 2 Quad Q9400

2008

Why buy it

✅+0.2% higher PassMark.

Trade-offs

❌Lower PassMark per dollar, at 9.4 vs 51.3 PassMark/$ ($229 MSRP vs $42 MSRP).
❌86.3% higher power demand at 95W vs 51W.
❌No integrated graphics, while Celeron G3900 can still boot and troubleshoot without a discrete GPU.
❌No boxed cooler included, unlike Celeron G3900.

Quick Answers

So, is Celeron G3900 better than Core 2 Quad Q9400?

It depends on what you want from the system. For gaming, Celeron G3900 is ahead with a 1.6% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core 2 Quad Q9400 pulls ahead with 0.2% better PassMark.

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

For streaming, content creation, and heavier multitasking, Core 2 Quad Q9400 is the stronger fit. You are getting 0.2% better PassMark, backed by 4 cores and 4 threads.

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

Celeron G3900 is the better buy right now. Celeron G3900 comes in $187 cheaper on MSRP at $42 MSRP versus $229 MSRP, and it still gives you a 1.6% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Core 2 Quad Q9400 is still stronger for heavier multi-core work with 0.2% better PassMark. It is also 444.0% better value on MSRP (51.3 vs 9.4 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Celeron G3900 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.

Celeron G3900 vs Core 2 Quad Q9400 Technical Specifications

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

Celeron G3900

The Celeron G3900 is manufactured by Intel. It was released in 1 September 2015 (10 years ago). It is based on the Skylake (2015−2016) architecture. It features 2 cores and 2 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 51 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 2,155 points. Launch price was $42.

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.

⚡

Processing Power

The Celeron G3900 packs 2 cores / 2 threads, while the Core 2 Quad Q9400 offers 4 cores / 4 threads — the Core 2 Quad Q9400 has 2 more cores. Boost clocks reach 2.8 GHz on the Celeron G3900 versus 2.67 GHz on the Core 2 Quad Q9400 — a 4.8% clock advantage for the Celeron G3900 (base: 2.8 GHz vs 2.66 GHz). The Celeron G3900 uses the Skylake (2015−2016) architecture (14 nm), while the Core 2 Quad Q9400 uses Yorkfield (2007−2009) (45 nm). In PassMark, the Celeron G3900 scores 2,155 against the Core 2 Quad Q9400's 2,160 — a 0.2% lead for the Core 2 Quad Q9400. L3 cache: 4 MB (total) on the Celeron G3900 vs 0 kB on the Core 2 Quad Q9400.

Feature	Celeron G3900	Core 2 Quad Q9400
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	2.8 GHz+5%	2.67 GHz
Base Clock	2.8 GHz+5%	2.66 GHz
L3 Cache	4 MB (total)	0 kB
L2 Cache	256 kB (per core)	6 MB (total)+2300%
Process	14 nm-69%	45 nm
Architecture	Skylake (2015−2016)	Yorkfield (2007−2009)
PassMark	2,155	2,160
Geekbench 6 Single	680	—
Geekbench 6 Multi	1,250	—

🧠

Memory & Platform

The Celeron G3900 uses the LGA1151 socket (PCIe 3.0), while the Core 2 Quad Q9400 uses LGA775 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2133 on the Celeron G3900 versus DDR3-1066 on the Core 2 Quad Q9400 — the Celeron G3900 supports 100.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron G3900 supports up to 64 GB of RAM compared to 8 GB — 700% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Celeron G3900) vs 0 (Core 2 Quad Q9400) — the Celeron G3900 offers 16 more lanes for additional GPUs or NVMe drives.

Feature	Celeron G3900	Core 2 Quad Q9400
Socket	LGA1151	LGA775
PCIe Generation	PCIe 3.0+173%	PCIe 1.1
Max RAM Speed	DDR4-2133+100%	DDR3-1066
Max RAM Capacity	64 GB+700%	8 GB
RAM Channels	2	2
ECC Support	Yes	No
PCIe Lanes	16	0

🔧

Advanced Features

Neither processor supports overclocking. Virtualization support: VT-x, VT-d (Celeron G3900) vs VT-x (Core 2 Quad Q9400). The Celeron G3900 includes integrated graphics (Intel HD Graphics 510), while the Core 2 Quad Q9400 requires a dedicated GPU. Primary use case: Celeron G3900 targets Desktop, Core 2 Quad Q9400 targets Desktop. Direct competitor: Celeron G3900 rivals Pentium G4400.

Feature	Celeron G3900	Core 2 Quad Q9400
Integrated GPU	Yes	No
IGPU Model	Intel HD Graphics 510	—
Unlocked	No	No
AVX-512	No	No
Virtualization	VT-x, VT-d	VT-x
Target Use	Desktop	Desktop

💰

Value Analysis

At launch, the Celeron G3900 was priced at $42, while the Core 2 Quad Q9400 came in at $229. On launch pricing ($42 vs $229), Celeron G3900 was $187 cheaper. In terms of value on MSRP (PassMark points per dollar), the Celeron G3900 delivers 51.3 pts/$ vs 9.4 pts/$ for the Core 2 Quad Q9400 — making the Celeron G3900 the 137.9% better value option.

Feature	Celeron G3900	Core 2 Quad Q9400
MSRP	$42-82%	$229
Performance per Dollar	51.3+446%	9.4
Release Date	2015	2008

Search Celeron G3900 on Amazon

Search Core 2 Quad Q9400 on Amazon

Affiliate Disclosure

ChipVERSUS is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We may earn a commission on qualifying purchases made through our links. This comes at no additional cost to you and helps support our work in providing comprehensive PC building guides and tools.

Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates.