Celeron 2957U vs Celeron B815

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 2957U vs Celeron B815 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 2957U vs Celeron B815: Pros, Cons & Final Verdict

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

Celeron 2957U

2014

Why buy it

Trade-offs

❌Lower PassMark (2,077 vs 2,093).

Celeron B815

2012

Why buy it

✅60% more PCIe lanes (16 vs 10) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $86 MSRP, while Celeron 2957U mostly shows up through inconsistent older-market listings.

Quick Answers

So, is Celeron B815 better than Celeron 2957U?

Yes. Celeron B815 is the better all-around CPU here. It gives you a 0.9% average FPS lead across 50 shared CPU game tests in our data and 0.8% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Celeron B815 is the better pick. According to our tests, it delivers 0.9% 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 B815 is the stronger fit. You are getting 0.8% better PassMark, backed by 2 cores and 2 threads.

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

Celeron B815 is the better buy right now. Celeron B815 comes in at an unclear MSRP at $86 MSRP versus unclear MSRP, and it still gives you a 0.9% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (24.3 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Celeron 2957U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2014 vs 2012). That makes it the safer long-term bet.

Celeron 2957U vs Celeron B815 Technical Specifications

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

Celeron 2957U

The Celeron 2957U is manufactured by Intel. It was released in 1 January 2014 (11 years ago). It is based on the Haswell (2013−2015) architecture. It features 2 cores and 2 threads. Base frequency is 1.4 GHz, with boost up to 1.4 GHz. L3 cache: 2 MB. L2 cache: 512 kB. Built on 22 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 15 Watt. Memory support: DDR3. Passmark benchmark score: 2,077 points. Launch price was $107.

Celeron B815

The Celeron B815 is manufactured by Intel. It was released in 1 January 2012 (13 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: 2,093 points. Launch price was $86.

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Processing Power

Both the Celeron 2957U and Celeron B815 share an identical 2-core/2-thread configuration. Boost clocks reach 1.4 GHz on the Celeron 2957U versus 1.6 GHz on the Celeron B815 — a 13.3% clock advantage for the Celeron B815 (base: 1.4 GHz vs 1.6 GHz). The Celeron 2957U uses the Haswell (2013−2015) architecture (22 nm), while the Celeron B815 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Celeron 2957U scores 2,077 against the Celeron B815's 2,093 — a 0.8% lead for the Celeron B815. L3 cache: 2 MB on the Celeron 2957U vs 2 MB (total) on the Celeron B815.

Feature	Celeron 2957U	Celeron B815
Cores / Threads	2 / 2	2 / 2
Boost Clock	1.4 GHz	1.6 GHz+14%
Base Clock	1.4 GHz	1.6 GHz+14%
L3 Cache	2 MB	2 MB (total)
L2 Cache	512 kB+100%	256K (per core)
Process	22 nm-31%	32 nm
Architecture	Haswell (2013−2015)	Sandy Bridge (2011−2013)
PassMark	2,077	2,093
Geekbench 6 Single	284	—

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Memory & Platform

The Celeron 2957U uses the FCBGA1168 socket (PCIe 3.0), while the Celeron B815 uses PGA988 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3L-1600 on the Celeron 2957U versus DDR3-1333 on the Celeron B815 — the Celeron 2957U supports 20% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 16 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 10 (Celeron 2957U) vs 16 (Celeron B815) — the Celeron B815 offers 6 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Wildcat Point-LP (Celeron 2957U) and HM65,HM67,QM67,QM77 (Celeron B815).

Feature	Celeron 2957U	Celeron B815
Socket	FCBGA1168	PGA988
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR3L-1600+20%	DDR3-1333
Max RAM Capacity	16 GB	16 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	10	16+60%

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Advanced Features

Neither processor supports overclocking. Both support VT-x virtualization. Both include integrated graphics — HD Graphics (Haswell) (Celeron 2957U) and HD Graphics (Sandy Bridge) (Celeron B815) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron 2957U targets Budget, Celeron B815 targets Budget. Direct competitor: Celeron 2957U rivals Pentium 2117U; Celeron B815 rivals Pentium 967.