Core i7-640M vs Celeron B815

CPU

GPU

Core i7-640M

2 Cores4 Thrd35 WWMax: 3.46 GHz2010

Celeron B815

2 Cores2 Thrd0 WWMax: 1.6 GHz2012

Performance Spectrum - CPU

Core i7-640M

2 / 4

2,092

0.0%

2,093

0.0%

About PassMark

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.

Value Upgrade Path

This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money. The Core i7-640M is positioned at rank 107 and the Celeron B815 is on rank 799, so the Core i7-640M offers better cost-efficiency for playing games.

MSRP is the manufacturer's suggested retail price.•
Avg price is the current average price collected from markets across the web.

Performance Per Dollar Core i7-640M

#31

Ryzen 5 230

MSRP: $200|Avg: $190

96%

#95

Atom x5-Z8300

MSRP: $20|Avg: N/A

280%

#96

Atom Z3735G

MSRP: $17|Avg: N/A

276%

#97

Core i5-480M

MSRP: $81|Avg: $77

254%

#98

Core i5-460M

MSRP: $80|Avg: $129

253%

#99

Core i5-2540M

MSRP: $266|Avg: $10

250%

#101

Core i5-450M

MSRP: $32|Avg: $31

242%

#102

Core i3-380M

MSRP: $49|Avg: $25

232%

#103

Core i5-430M

MSRP: N/A|Avg: $33

231%

#104

Core 2 Duo T6600

MSRP: N/A|Avg: $4

225%

#107

Core i7-640M

MSRP: N/A|Avg: N/A

100%

#109

Celeron 4305U

MSRP: $107|Avg: N/A

100%

#110

Celeron J1850

MSRP: $82|Avg: N/A

99%

#114

Core i3-4100M

MSRP: $225|Avg: $99

97%

Based on actual market prices and performance synthetic scores.

Performance Per Dollar Celeron B815

#786

Atom x5-Z8300

MSRP: $20|Avg: N/A

1205%

#787

Atom Z3735G

MSRP: $17|Avg: N/A

1188%

#788

Core i5-480M

MSRP: $81|Avg: $77

1090%

#789

Core i5-460M

MSRP: $80|Avg: $129

1085%

#790

Core i5-2540M

MSRP: $266|Avg: $10

1076%

#792

Core i5-450M

MSRP: $32|Avg: $31

1039%

#793

Core i3-380M

MSRP: $49|Avg: $25

996%

#794

Core i5-430M

MSRP: N/A|Avg: $33

994%

#795

Core 2 Duo T6600

MSRP: N/A|Avg: $4

968%

#799

Celeron B815

MSRP: $86|Avg: $15

100%

#800

Celeron B810

MSRP: $86|Avg: $86

100%

#802

Core i7-1365UE

MSRP: $429|Avg: $429

99%

#804

3020e

MSRP: $100|Avg: $25

99%

#808

Athlon II M320

MSRP: $75|Avg: $15

98%

#809

Celeron B800

MSRP: $80|Avg: $5

98%

#810

Celeron B710

MSRP: $86|Avg: $10

98%

#812

Athlon II Neo K345

MSRP: $50|Avg: $10

98%

Based on actual market prices and performance synthetic scores.

Performance Comparison

About PassMark

🏆 Chipversus Verdict

🚀 Performance Leadership

Performance Trade-off: The Core i7-640M leads in gaming performance. However, the Celeron B815 is the stronger candidate for professional workloads, offering 0% greater multi-core processing power.

Insight	Core i7-640M	Celeron B815
Gaming	✅ Superior gaming performance	❌ Lower gaming performance
Workstation	❌ Weaker in multi-core tasks	✅ Better multi-core power
Price	✅ More affordable ($0)	⚠️ Higher cost ($15)
Longevity	🛑 Legacy (Arrandale (2010−2011) / 32 nm)	🛑 Legacy (Sandy Bridge (2011−2013) / 32 nm)

💎 Value Proposition

Insight	Core i7-640M	Celeron B815
Cost Efficiency	❌ Lower cost efficiency	❌ Lower cost efficiency
Upfront Cost	✅ More affordable ($0)	⚠️ Higher cost ($15)

Performance Check

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

Core i7-640M Benchmark Check

Celeron B815 Benchmark Check

Technical Specifications

Side-by-side comparison of Core i7-640M and Celeron B815

Core i7-640M

The Core i7-640M is manufactured by Intel. It was released in 1 September 2010 (15 years ago). It is based on the Arrandale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 2.8 GHz, with boost up to 3.46 GHz. L3 cache: 4 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: 2,092 points. Launch price was $346.

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.

⚡

Processing Power

The Core i7-640M packs 2 cores / 4 threads, matching the Celeron B815's 2 cores. Boost clocks reach 3.46 GHz on the Core i7-640M versus 1.6 GHz on the Celeron B815 — a 73.5% clock advantage for the Core i7-640M (base: 2.8 GHz vs 1.6 GHz). The Core i7-640M uses the Arrandale (2010−2011) architecture (32 nm), while the Celeron B815 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Core i7-640M scores 2,092 against the Celeron B815's 2,093 — a 0% lead for the Celeron B815. L3 cache: 4 MB (total) on the Core i7-640M vs 2 MB (total) on the Celeron B815.

Feature	Core i7-640M	Celeron B815
Cores / Threads	2 / 4	2 / 2
Boost Clock	3.46 GHz+116%	1.6 GHz
Base Clock	2.8 GHz+75%	1.6 GHz
L3 Cache	4 MB (total)+100%	2 MB (total)
L2 Cache	256K (per core)	256K (per core)
Process	32 nm	32 nm
Architecture	Arrandale (2010−2011)	Sandy Bridge (2011−2013)
PassMark	2,092	2,093

🧠

Memory & Platform

Both processors use the PGA988 socket with PCIe 2.0. Maximum memory speed reaches 1066 on the Core i7-640M versus DDR3-1333 on the Celeron B815 — the Core i7-640M supports 198.9% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron B815 supports up to 16 GB of RAM compared to 8 — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: HM55,HM57,QM57 (Core i7-640M) and HM65,HM67,QM67,QM77 (Celeron B815).

Feature	Core i7-640M	Celeron B815
Socket	PGA988	PGA988
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	1066+35433%	DDR3-1333
Max RAM Capacity	8	16 GB+209715100%
RAM Channels	2	2
ECC Support	❌	❌
PCIe Lanes	16	16

🔧

Advanced Features

Neither processor supports overclocking. Virtualization support: true (Core i7-640M) vs VT-x (Celeron B815). Both include integrated graphics — Intel HD Graphics (Ironlake) (Core i7-640M) and HD Graphics (Sandy Bridge) (Celeron B815) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron B815 targets Budget. Direct competitor: Core i7-640M rivals Core 2 Duo T9600; Celeron B815 rivals Pentium 967.