CPU Comparison
Core i7-620M vs Core i7-640LM
A side-by-side comparison of specs, performance and value. The Intel Core i7-620M is a standard-voltage mobile processor launched in early 2010, utilizing the 32nm Arrandale architecture. Designed for mainstream and performance laptops, it operates on a 35W thermal envelope, offering a balance of power and portability. The processor features 2 cores and 4 threads, running at a base clock of 2.66 GHz and a max turbo frequency of 3.33 GHz. This aggressive clock speed made it one of the fastest mobile dual-core processors available at launch. It utilized a multi-chip package, combining a 32nm CPU die with a 45nm graphics and memory controller die. With 4 MB of Smart Cache, it delivered excellent responsiveness for 2010-era productivity, gaming, and multitasking. While obsolete today, the 620M was a workhorse chip in premium laptops, providing desktop-class performance in a mobile form factor.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Struggles with modern web and office software.
Struggles immensely with modern JavaScript-heavy web pages.
Gaming
Can run very old games, but lacks modern instructions.
Integrated Ironlake graphics cannot run any modern games.
Virtualization
Can run basic VMs but lacks RAM support.
Technically supports VT-x but lacks the RAM and cores for practical use.
Efficiency
35W for 2 cores is inefficient by modern standards.
Poor by modern standards, but efficient for its time.
Specialized Performance
AI / ML
- No AI capabilities.
- No AI capabilities whatsoever.
Content Creation
Gaming
- Ironlake graphics are too weak; relies on discrete GPUs. Lacks AVX2.
- Ironlake graphics are strictly for display output and legacy 2D/low-end 3D applications.
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Very high clock speeds for 2010
- Good single-threaded performance
- Socketed design allows replacement
- Included AES-NI
Cons
- Only 2 cores
- Obsolete integrated graphics
- High 35W TDP for a dual-core
- Lacks modern instruction sets
Pros
- Good performance-per-watt for 2010
- Included AES-NI for hardware encryption
- Integrated graphics reduced platform footprint
- Hyper-Threading improved multitasking
Cons
- Extremely outdated architecture
- Integrated graphics are unusable for modern tasks
- Soldered to motherboard (BGA)
- Lacks modern instruction sets
Competitors & Alternatives
Core i7-620M
- Intel Core 2 Duo P9700Rival
Mobile
- AMD Phenom II P920Rival
Mobile
- Compare head-to-headIntel Core i5-430MRival
Mobile
- Intel Core i7-640MRival
Mobile
- AMD Turion II Ultra M640Rival
Mobile
Modern mobile alternative with massive multi-core gains.
Compare head-to-head- AMD Ryzen 5 5625UAlt
Modern efficient mobile chip.
- Intel Core i7-2620MAlt
Sandy Bridge successor.
- Intel N100Alt
Modern budget alternative.
- Alt
Modern ARM comparison.
Compare head-to-head
Core i7-640LM
- Intel Core 2 Duo SU9600Rival
Mobile Low Power
- AMD Turion II Neo K625Rival
Mobile Low Power
- Intel Core i5-430UMRival
Mobile Low Power
- Intel Core i7-620UMRival
Mobile Ultra Low Power
- AMD Phenom II P920Rival
Mobile
Modern low-power mobile alternative with vastly superior efficiency and 8 cores.
Compare head-to-head- AMD Ryzen 3 5300UAlt
Budget modern mobile chip that outperforms it exponentially.
- Intel Core i7-2620MAlt
The Sandy Bridge successor if looking at historical mobile upgrades.
- Alt
Demonstrates the incredible leap in mobile ARM efficiency over the last decade.
Compare head-to-head - Intel N100Alt
A modern budget chip that crushes this old Core i7 in every metric.
Our Verdict on Each
A high-performance standard-voltage mobile CPU for 2010, but completely obsolete by modern standards.
Best for: Legacy laptop repair
Read the full reviewAn innovative low-power CPU for 2010 laptops, but completely obsolete for modern computing tasks.
Best for: Nostalgic retro computing
Read the full reviewFrequently Asked Questions
Which is better, Core i7-620M or Core i7-640LM?
Based on our editorial ratings, the Core i7-620M comes out ahead with a score of 3.5/10. That said, the best choice depends on your workload — check the spec and performance breakdown above for gaming, productivity and efficiency differences.
Which is faster for gaming, Core i7-620M or Core i7-640LM?
For gaming, the Core i7-620M leads with a gaming performance score of 15/100 among Core i7-620M and Core i7-640LM.
Which uses less power?
The Core i7-640LM has the lowest rated TDP. Power draw across these chips: Core i7-620M (35 W), Core i7-640LM (25 W).
Do Core i7-620M and Core i7-640LM use the same socket?
No. They use different sockets (Core i7-620M: Socket G1 (rPGA988A), Core i7-640LM: BGA 1288), so each needs a compatible motherboard.
Which is faster in multi-core benchmarks?
The Core i7-620M posts the highest multi-core benchmark score. Multi-core results: Core i7-620M (2,200), Core i7-640LM (1,800). Benchmark figures are approximate and workload-dependent.