CPU Comparison
Intel Core i7-3635QM vs Core i7-3840QM
A side-by-side comparison of specs, performance and value. The Intel Core i7-3635QM is a high-performance mobile processor launched in late 2012 as part of the Ivy Bridge generation. Designed for premium laptops and mobile workstations, it features four cores and eight threads, delivering robust parallel processing capabilities. It operates at a base clock of 2.4 GHz and can boost up to 3.4 GHz using Intel Turbo Boost 2.0. Unlike the socketed 3630QM, the 3635QM utilizes a BGA 1224 package, meaning it is soldered directly to the motherboard. This allows for slightly thinner laptop designs but prevents CPU upgrades. With a 45-watt thermal design power, it balances high performance with the thermal constraints of premium mobile chassis. The integrated Intel HD 4000 graphics offer capable multimedia decoding. This CPU was a popular choice for system integrators building compact, high-performance laptops where board space and component height were critical factors.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
8 threads handle everyday multitasking and office workloads without issues.
Still capable for basic office tasks and web browsing.
Gaming
Handles older or eSports titles well when paired with a discrete GPU.
Handles older or lightweight games well but struggles with modern AAA titles.
Virtualization
Can run light VMs, but limited by DDR3 bandwidth and 45W power.
VT-x support makes it suitable for light VMs on the go.
Efficiency
22nm Ivy Bridge is not as efficient as modern mobile processes.
22nm was efficient for 2012, but modern 10nm/Intel 4 chips are far superior.
Specialized Performance
AI / ML
- No dedicated AI hardware
- CPU inference is slow
- No AI acceleration hardware
- Too slow for modern AI workloads
Content Creation
Gaming
- Needs a discrete GPU for gaming
- Capable of 60fps in older titles
- Will bottleneck modern high-end mobile GPUs
- HD 4000 is not suitable for modern gaming
- Requires discrete GPU for AAA titles
- Fine for retro and indie games
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Good quad-core performance for its era
- BGA design allows for thinner laptops
- Strong turbo boost frequencies
- Decent 6MB L3 cache
Cons
- Soldered to motherboard, cannot be upgraded
- Older 22nm process
- Supports only DDR3
- Weak integrated graphics
Pros
- Excellent performance for 2012 mobile
- 22nm process improved efficiency
- 8MB L3 cache
- Hyper-Threading support
Cons
- Soldered BGA package prevents upgrades
- Lacks AVX2 instruction set
- Weak integrated graphics by modern standards
- End-of-life with no security updates
Competitors & Alternatives
Intel Core i7-3635QM
- AMD A10-4600MRival
Mobile
- Compare head-to-headIntel Core i7-3630QMRival
Mobile
- Intel Core i7-3612QMRival
Mobile
- AMD FX-6100Rival
Desktop
- Compare head-to-headIntel Core i5-3210MRival
Mobile
Newer Haswell architecture with better efficiency.
Compare head-to-head- AMD Ryzen 5 3500UAlt
Modern mobile alternative with vastly superior efficiency.
- Intel Core i5-8250UAlt
Much faster and more efficient for budget laptops.
- Alt
Incredible performance per watt.
Compare head-to-head
Core i7-3840QM
- AMD A10-4600MRival
Mobile
Newer Haswell architecture with better performance.
Compare head-to-headCheaper dual-core alternative from the same generation.
Compare head-to-head
Our Verdict on Each
A capable mobile CPU that provided excellent quad-core performance for laptops in its era, utilizing a space-saving BGA design.
Best for: Purchasing a budget, used laptop for basic tasks or retro gaming.
Read the full reviewFor its time, the i7-3840QM was a mobile powerhouse offering excellent multi-threaded performance, though its soldered BGA package limits modern upgradeability.
Best for: Repairing an existing 2012-era premium laptop.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i7-3635QM or Core i7-3840QM?
Based on our editorial ratings, the Core i7-3840QM comes out ahead with a score of 7.5/10. 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, Intel Core i7-3635QM or Core i7-3840QM?
For gaming, the Core i7-3840QM leads with a gaming performance score of 60/100 among Intel Core i7-3635QM and Core i7-3840QM.
Do Intel Core i7-3635QM and Core i7-3840QM use the same socket?
Yes — all of these CPUs use the Intel BGA 1224 socket, so they share compatible motherboards.
Which is faster in multi-core benchmarks?
The Core i7-3840QM posts the highest multi-core benchmark score. Multi-core results: Intel Core i7-3635QM (4,900), Core i7-3840QM (8,100). Benchmark figures are approximate and workload-dependent.