CPU Comparison
Intel Core i7-3615QE vs Core i7-840QM
A side-by-side comparison of specs, performance and value. The Intel Core i7-3615QE is a high-performance mobile embedded processor launched in April 2012 as part of the Ivy Bridge family. The 'QE' suffix denotes its focus on quad-core embedded systems, operating at a 45-watt TDP. Built on Intel's 22nm process, it features 4 physical cores and 8 threads, a significant upgrade over the dual-core ULV variants. The processor runs at a base clock of 2.3 GHz and can boost up to 3.3 GHz. It includes 6MB of L3 cache and supports dual-channel DDR3 memory. A standout feature of the 3615QE is its support for ECC (Error-Correcting Code) memory, making it suitable for industrial PCs, medical imaging, and critical embedded systems. While its 45W TDP requires active cooling, its combination of quad-core performance, ECC support, and Intel HD Graphics 4000 makes it a powerful chip for demanding industrial applications.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Handles office tasks well but slow for modern rendering.
8 threads and 8MB cache help with heavy multitasking.
Gaming
Not intended for gaming, but can run older titles.
Good for 2010 games but low single-core by modern standards.
Virtualization
Can run basic VMs but limited by 4 cores.
Excellent for legacy VMs with VT-d support.
Efficiency
45W TDP is inefficient by modern embedded standards.
45W TDP on 45nm is very hot and power-hungry.
Specialized Performance
AI / ML
- No AI hardware
- No AI hardware
Content Creation
Gaming
- Not intended for gaming
- HD 4000 is too weak for modern titles
- Requires discrete GPU
- Can bottleneck modern games
- Good for retro gaming
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- ECC memory support
- 4 cores with Hyper-Threading
- VT-x and VT-d virtualization
- HD 4000 graphics
Cons
- High 45W TDP
- Very slow for modern tasks
- No Windows 11 support
- Soldered to motherboard
Pros
- Large 8MB L3 cache
- High 3.2 GHz turbo boost
- 8 threads for multitasking
- Socketed (Socket G1)
Cons
- Very hot running (45W)
- No integrated graphics
- Obsolete 45nm process
- Expensive at launch
Competitors & Alternatives
Intel Core i7-3615QE
- AMD Embedded R-464LRival
Embedded
- Compare head-to-headIntel Core i7-2715QERival
Embedded
- Intel Core i5-3610QERival
Embedded
- AMD Embedded G-T40NRival
Embedded
- Intel Atom E3845Rival
Embedded
- Intel Core i7-4700EQAlt
Successor with better performance and efficiency.
- Intel Core i7-9700TAlt
Modern embedded alternative with 8 cores.
- AMD Ryzen Embedded V1605BAlt
Modern embedded alternative with Vega graphics.
Lower 35W TDP alternative.
Compare head-to-head- Intel Xeon E-2176GAlt
Modern server alternative with ECC support.
Our Verdict on Each
A capable 2012 embedded quad-core chip with ECC support, but inefficient by modern standards.
Best for: If you are considering the Intel Core i7-3615QE, you are likely maintaining an older industrial PC or a specialized embedded system. This processor should not be sought for consumer use, as its 45W TDP and older 22nm architecture make it inefficient for modern laptops and ultrabooks. It is only recommended if you need to keep a specific legacy system running that requires a direct replacement part with ECC memory support. Avoid using this CPU for general web browsing or modern office work, as there are much cheaper and faster alternatives available. It is best utilized in its original context: high-performance, always-on embedded systems where stability is paramount. For any new industrial builds, modern embedded processors offer vastly superior performance, security, and power efficiency.
Read the full reviewA top-tier mobile CPU in 2010, offering excellent multi-threaded performance and a large cache, but runs hot and is obsolete today.
Best for: Repairing a legacy mobile workstation
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i7-3615QE or Core i7-840QM?
Based on our editorial ratings, the Core i7-840QM comes out ahead with a score of 6.5/10. 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 i7-3615QE or Core i7-840QM?
For gaming, the Core i7-840QM leads with a gaming performance score of 35/100 among Intel Core i7-3615QE and Core i7-840QM.
Do Intel Core i7-3615QE and Core i7-840QM use the same socket?
No. They use different sockets (Intel Core i7-3615QE: Intel BGA 1023, Core i7-840QM: Intel Socket G1), so each needs a compatible motherboard.