CPU Comparison
Intel Core i7-3635QM vs Core i7-3940XM
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.
High clocks keep it surprisingly snappy for basic tasks.
Gaming
Handles older or eSports titles well when paired with a discrete GPU.
Excellent for 2012 games, can still handle older esports titles.
Virtualization
Can run light VMs, but limited by DDR3 bandwidth and 45W power.
Great for running VMs on the go.
Efficiency
22nm Ivy Bridge is not as efficient as modern mobile processes.
55W TDP is terrible for battery life.
Specialized Performance
AI / ML
- No dedicated AI hardware
- CPU inference is slow
- No modern AI support
- Instruction sets outdated
Content Creation
Gaming
- Needs a discrete GPU for gaming
- Capable of 60fps in older titles
- Will bottleneck modern high-end mobile GPUs
- Max Ivy Bridge single-core speed
- Needs discrete GPU
- Overclockable for extra headroom
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
- Unlocked multiplier for extreme overclocking
- Highest Ivy Bridge mobile clocks
- Socketed for upgrades
- Excellent 2012 performance
Cons
- Extremely high 55W TDP
- Runs very hot
- Lacks AVX2
- Massive power draw for mobile
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 i7-3940XM
- AMD A10-4600MRival
Mobile
- Intel Core i7-3920XMAlt
Slightly slower but essentially the same chip.
The newer Haswell-based Extreme Edition.
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 reviewA minor but potent refresh of the 3920XM, offering the absolute best Ivy Bridge mobile performance with unlocked overclocking potential.
Best for: Maxing out an old extreme gaming laptop.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i7-3635QM or Core i7-3940XM?
Based on our editorial ratings, the Core i7-3940XM comes out ahead with a score of 8.2/10. 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 i7-3940XM?
For gaming, the Core i7-3940XM leads with a gaming performance score of 66/100 among Intel Core i7-3635QM and Core i7-3940XM.
Which uses less power?
The Intel Core i7-3635QM has the lowest rated TDP. Power draw across these chips: Intel Core i7-3635QM (45 W), Core i7-3940XM (55 W).
Do Intel Core i7-3635QM and Core i7-3940XM use the same socket?
No. They use different sockets (Intel Core i7-3635QM: Intel BGA 1224, Core i7-3940XM: Intel Socket G2 (988B)), so each needs a compatible motherboard.
Which is faster in multi-core benchmarks?
The Core i7-3940XM posts the highest multi-core benchmark score. Multi-core results: Intel Core i7-3635QM (4,900), Core i7-3940XM (9,200). Benchmark figures are approximate and workload-dependent.