Celeron B840 vs Celeron N2815

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 B840 vs Celeron N2815 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 B840 vs Celeron N2815: Pros, Cons & Final Verdict

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

Celeron B840

2011

Why buy it

✅+100% larger total L3 cache (2 MB vs 1 MB).
✅300% more PCIe lanes (16 vs 4) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (1,065 vs 1,068).
❌Launch MSRP is still $86 MSRP, while Celeron N2815 mostly shows up through inconsistent older-market listings.

Celeron N2815

2013

Why buy it

Trade-offs

❌Smaller total L3 cache (1 MB vs 2 MB).

Quick Answers

So, is Celeron N2815 better than Celeron B840?

Yes. Celeron N2815 is the better all-around CPU here. It gives you 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, Celeron N2815 has the edge because it leads the single-thread side of this matchup with 12.1% higher max boost clock.

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

For streaming, content creation, and heavier multitasking, Celeron N2815 is the stronger fit. You are getting 0.3% better PassMark, backed by 2 cores and 2 threads.

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

Celeron N2815 is still the much better call for a fresh build. Celeron N2815 comes in at an unclear MSRP at unclear MSRP versus $86 MSRP, and it still gives you 0.3% higher PassMark. Celeron B840 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2011 platform. Even with 100.0% better value on paper (12.4 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on PGA988.

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

Celeron N2815 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2013 vs 2011) and more multi-core headroom with 2 cores / 2 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Celeron B840 vs Celeron N2815 Technical Specifications

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

Celeron B840

The Celeron B840 is manufactured by Intel. It was released in 1 July 2011 (14 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 2 threads. Base frequency is 1.9 GHz, with boost up to 1.9 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: 1,065 points. Launch price was $86.

Celeron N2815

The Celeron N2815 is manufactured by Intel. It was released in 1 December 2013 (12 years ago). It is based on the Bay Trail-M (2013−2014) architecture. It features 2 cores and 2 threads. Base frequency is 1.86 GHz, with boost up to 2.13 GHz. L3 cache: 1 MB. L2 cache: 1 MB. Built on 22 nm process technology. Socket: FCBGA1170. Thermal design power (TDP): 7.5 Watt. Memory support: DDR3L-1066. Passmark benchmark score: 1,068 points. Launch price was $107.

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Processing Power

Both the Celeron B840 and Celeron N2815 share an identical 2-core/2-thread configuration. Boost clocks reach 1.9 GHz on the Celeron B840 versus 2.13 GHz on the Celeron N2815 — a 11.4% clock advantage for the Celeron N2815 (base: 1.9 GHz vs 1.86 GHz). The Celeron B840 uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Celeron N2815 uses Bay Trail-M (2013−2014) (22 nm). In PassMark, the Celeron B840 scores 1,065 against the Celeron N2815's 1,068 — a 0.3% lead for the Celeron N2815. L3 cache: 2 MB (total) on the Celeron B840 vs 1 MB on the Celeron N2815.

Feature	Celeron B840	Celeron N2815
Cores / Threads	2 / 2	2 / 2
Boost Clock	1.9 GHz	2.13 GHz+12%
Base Clock	1.9 GHz+2%	1.86 GHz
L3 Cache	2 MB (total)+100%	1 MB
L2 Cache	256K (per core)+25500%	1 MB
Process	32 nm	22 nm-31%
Architecture	Sandy Bridge (2011−2013)	Bay Trail-M (2013−2014)
PassMark	1,065	1,068
Geekbench 6 Single	450	—
Geekbench 6 Multi	790	—

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Memory & Platform

The Celeron B840 uses the PGA988 socket (PCIe 2.0), while the Celeron N2815 uses FCBGA1170 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 1333 on the Celeron B840 versus 1066 on the Celeron N2815 — the Celeron B840 supports 25% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron B840 supports up to 16 of RAM compared to 8 — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Celeron B840) vs 4 (Celeron N2815) — the Celeron B840 offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM65,HM67,QM67 (Celeron B840) and FCBGA1170 (Celeron N2815).

Feature	Celeron B840	Celeron N2815
Socket	PGA988	FCBGA1170
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	1333+25%	1066
Max RAM Capacity	16+100%	8
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16+300%	4

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Advanced Features

Neither processor supports overclocking. Both support true virtualization. Both include integrated graphics — Intel HD Graphics (Sandy Bridge) (Celeron B840) and Intel HD Graphics (Bay Trail) (Celeron N2815) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron B840 targets Budget. Direct competitor: Celeron B840 rivals Pentium B940; Celeron N2815 rivals AMD A4-1250.

Feature	Celeron B840	Celeron N2815
Integrated GPU	Yes	Yes
IGPU Model	Intel HD Graphics (Sandy Bridge)	Intel HD Graphics (Bay Trail)
Unlocked	No	No
AVX-512	No	No
Virtualization	true	true
Target Use	Budget	—