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 B810 vs Core 2 Quad Q8400 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 B810 vs Core 2 Quad Q8400: Pros, Cons & Final Verdict

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

Celeron B810

2011

Why buy it

✅Costs $97 less on MSRP ($86 MSRP vs $183 MSRP).
✅Delivers 114.3% more PassMark for each dollar spent, at 24.3 vs 11.3 PassMark/$ ($86 MSRP vs $183 MSRP).
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with HD Graphics (Sandy Bridge), while Core 2 Quad Q8400 needs a discrete GPU.

Trade-offs

❌No boxed cooler included, unlike Core 2 Quad Q8400.

Core 2 Quad Q8400

2009

Why buy it

✅Includes a boxed cooler (true), unlike Celeron B810.

Trade-offs

❌Lower PassMark (2,076 vs 2,091).
❌Lower PassMark per dollar, at 11.3 vs 24.3 PassMark/$ ($183 MSRP vs $86 MSRP).
❌No integrated graphics, while Celeron B810 can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Celeron B810 better than Core 2 Quad Q8400?

Yes. Celeron B810 is the better all-around CPU here. It gives you a 2.3% average FPS lead across 50 shared CPU game tests in our data, 0.7% 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, Celeron B810 is the better pick. According to our tests, it delivers 2.3% 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, Celeron B810 is the stronger fit. You are getting 0.7% better PassMark, backed by 2 cores and 2 threads.

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

Celeron B810 is the better buy right now. Celeron B810 comes in $97 cheaper on MSRP at $86 MSRP versus $183 MSRP, and it still gives you a 2.3% average FPS lead across 50 shared CPU game tests in our data. It is also 114.3% better value on MSRP (24.3 vs 11.3 PassMark/$), 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 B810 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2011 vs 2009) and more multi-core headroom with 2 cores / 2 threads instead of 4/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Celeron B810 vs Core 2 Quad Q8400 Technical Specifications

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

Celeron B810

The Celeron B810 is manufactured by Intel. It was released in 1 March 2011 (14 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 2 threads. Base frequency is 1.6 GHz, with boost up to 1.6 GHz. L3 cache: 2 MB (total). L2 cache: 256K (per core). Built on 32 nm process technology. Socket: PGA988. Thermal design power (TDP): 35 Watt. Memory support: DDR3. Passmark benchmark score: 2,091 points. Launch price was $86.

Core 2 Quad Q8400

The Core 2 Quad Q8400 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 0.67 GHz. L3 cache: 0 kB. L2 cache: 4 MB (total). Built on 45 nm process technology. Socket: LGA775. Thermal design power (TDP): 95 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 2,076 points. Launch price was $249.

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Processing Power

The Celeron B810 packs 2 cores / 2 threads, while the Core 2 Quad Q8400 offers 4 cores / 4 threads — the Core 2 Quad Q8400 has 2 more cores. Boost clocks reach 1.6 GHz on the Celeron B810 versus 0.67 GHz on the Core 2 Quad Q8400 — a 81.9% clock advantage for the Celeron B810 (base: 1.6 GHz vs 2.66 GHz). The Celeron B810 uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Core 2 Quad Q8400 uses Yorkfield (2007−2009) (45 nm). In PassMark, the Celeron B810 scores 2,091 against the Core 2 Quad Q8400's 2,076 — a 0.7% lead for the Celeron B810. L3 cache: 2 MB (total) on the Celeron B810 vs 0 kB on the Core 2 Quad Q8400.

Feature	Celeron B810	Core 2 Quad Q8400
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	1.6 GHz+139%	0.67 GHz
Base Clock	1.6 GHz	2.66 GHz+66%
L3 Cache	2 MB (total)	0 kB
L2 Cache	256K (per core)+6300%	4 MB (total)
Process	32 nm-29%	45 nm
Architecture	Sandy Bridge (2011−2013)	Yorkfield (2007−2009)
PassMark	2,091	2,076
Cinebench R23 Multi	—	852
Geekbench 6 Single	—	369
Geekbench 6 Multi	—	1,155

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Memory & Platform

The Celeron B810 uses the PGA988 socket (PCIe 2.0), while the Core 2 Quad Q8400 uses LGA775 (PCIe 1.1) — making them incompatible on the same motherboard. Both support up to DDR3-1333 memory speed. Both support up to 16 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Celeron B810) vs 0 (Core 2 Quad Q8400) — the Celeron B810 offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM65,HM67,QM67,QM77 (Celeron B810) and Intel P45,Intel G41,Intel Q45,Intel X48,Intel G31 (Core 2 Quad Q8400).

Feature	Celeron B810	Core 2 Quad Q8400
Socket	PGA988	LGA775
PCIe Generation	PCIe 2.0+82%	PCIe 1.1
Max RAM Speed	DDR3-1333	DDR3 1333 MHz
Max RAM Capacity	16 GB	16 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16	0

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Advanced Features

Neither processor supports overclocking. Virtualization support: VT-x (Celeron B810) vs true (Core 2 Quad Q8400). The Celeron B810 includes integrated graphics (HD Graphics (Sandy Bridge)), while the Core 2 Quad Q8400 requires a dedicated GPU. Primary use case: Celeron B810 targets Budget, Core 2 Quad Q8400 targets Desktop. Direct competitor: Celeron B810 rivals Pentium 967.

Feature	Celeron B810	Core 2 Quad Q8400
Integrated GPU	Yes	No
IGPU Model	HD Graphics (Sandy Bridge)	—
Unlocked	No	No
AVX-512	No	No
Virtualization	VT-x	true
Target Use	Budget	Desktop

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Value Analysis

At launch, the Celeron B810 was priced at $86, while the Core 2 Quad Q8400 came in at $183. On launch pricing ($86 vs $183), Celeron B810 was $97 cheaper. In terms of value on MSRP (PassMark points per dollar), the Celeron B810 delivers 24.3 pts/$ vs 11.3 pts/$ for the Core 2 Quad Q8400 — making the Celeron B810 the 72.7% better value option.

Feature	Celeron B810	Core 2 Quad Q8400
MSRP	$86-53%	$183
Performance per Dollar	24.3+115%	11.3
Release Date	2011	2009

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