Core i7-2600K vs Core i7-3840QM
Aggregate performance score
i7-3840QM outperforms i7-2600K by a small 8% based on our aggregate benchmark results.
Primary details
Comparing Core i7-3840QM and Core i7-2600K processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 1391 | 1457 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 1.29 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Core i7 | Intel Core i7 (Desktop) |
| Architecture codename | Ivy Bridge (2012−2013) | Sandy Bridge (2011−2013) |
| Release date | 3 September 2012 (11 years ago) | 9 January 2011 (13 years ago) |
| Launch price (MSRP) | $568 | $317 |
| Current price | $531 (0.9x MSRP) | $119 (0.4x MSRP) |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core i7-3840QM and Core i7-2600K basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 4 (Quad-Core) | 4 (Quad-Core) |
| Threads | 8 | 8 |
| Base clock speed | 2.8 GHz | 3.4 GHz |
| Boost clock speed | 3.8 GHz | 3.8 GHz |
| L1 cache | 64K (per core) | 64 KB (per core) |
| L2 cache | 256K (per core) | 256K (per core) |
| L3 cache | 8 MB (shared) | 8 MB (shared) |
| Chip lithography | 22 nm | 32 nm |
| Die size | 160 mm2 | 216 mm2 |
| Maximum core temperature | 105 °C | 73 °C |
| Number of transistors | 1,400 million | 1,160 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | No | Yes |
Compatibility
Information on Core i7-3840QM and Core i7-2600K compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 1 | 1 |
| Socket | FCBGA1224,FCPGA988 | LGA1155 |
| Power consumption (TDP) | 45 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-3840QM and Core i7-2600K. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® AVX | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX |
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | + |
| My WiFi | + | no data |
| Turbo Boost Technology | 2.0 | + |
| Hyper-Threading Technology | + | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | + | + |
| Demand Based Switching | - | no data |
| FDI | + | + |
| Fast Memory Access | + | + |
| Status | Discontinued | Discontinued |
Security technologies
Core i7-3840QM and Core i7-2600K technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | - |
| EDB | + | + |
| Secure Key | + | no data |
| Identity Protection | + | + |
| Anti-Theft | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-3840QM and Core i7-2600K are enumerated here.
| AMD-V | + | no data |
| VT-d | + | - |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-3840QM and Core i7-2600K. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
| Maximum memory size | 32 GB | 32 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 25.6 GB/s | 21 GB/s |
| ECC memory support | - | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel HD Graphics 4000 | Intel HD Graphics 3000 |
| Quick Sync Video | + | + |
| Clear Video HD | + | + |
| Graphics max frequency | 1.3 GHz | 1.35 GHz |
| InTru 3D | + | + |
Graphics interfaces
Available interfaces and connections of Core i7-3840QM and Core i7-2600K integrated GPUs.
| Number of displays supported | 3 | 2 |
| eDP | + | no data |
| DisplayPort | + | no data |
| HDMI | + | no data |
| SDVO | + | no data |
| CRT | + | no data |
Peripherals
Specifications and connection of peripherals supported by Core i7-3840QM and Core i7-2600K.
| PCIe version | 3.0 | 2.0 |
| PCI Express lanes | 16 | 16 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Core i7-3840QM outperforms Core i7-2600K by 8% based on our aggregate benchmark results.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Benchmark coverage: 68%
Core i7-3840QM outperforms Core i7-2600K by 8% in Passmark.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
Benchmark coverage: 42%
Core i7-2600K outperforms Core i7-3840QM by 8% in GeekBench 5 Single-Core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Benchmark coverage: 42%
Core i7-2600K outperforms Core i7-3840QM by 11% in GeekBench 5 Multi-Core.
Cinebench 10 32-bit single-core
Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.
Benchmark coverage: 20%
Core i7-3840QM outperforms Core i7-2600K by 7% in Cinebench 10 32-bit single-core.
Cinebench 10 32-bit multi-core
Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.
Benchmark coverage: 19%
Core i7-3840QM outperforms Core i7-2600K by 8% in Cinebench 10 32-bit multi-core.
3DMark06 CPU
3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.
Benchmark coverage: 19%
Core i7-3840QM outperforms Core i7-2600K by 5% in 3DMark06 CPU.
wPrime 32
wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.
Benchmark coverage: 18%
Core i7-2600K outperforms Core i7-3840QM by 42% in wPrime 32.
Cinebench 11.5 64-bit multi-core
Cinebench Release 11.5 Multi Core is a variant of Cinebench R11.5 which uses all the processor threads. A maximum of 64 threads is supported in this version.
Benchmark coverage: 17%
Core i7-3840QM outperforms Core i7-2600K by 5% in Cinebench 11.5 64-bit multi-core.
Cinebench 11.5 64-bit single-core
Cinebench R11.5 is an old benchmark by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version loads a single thread with ray tracing to render a glossy room full of crystal spheres and light sources.
Benchmark coverage: 14%
Core i7-3840QM outperforms Core i7-2600K by 5% in Cinebench 11.5 64-bit single-core.
TrueCrypt AES
TrueCrypt is a discontinued piece of software that was widely used for on-the-fly-encryption of disk partitions, now superseded by VeraCrypt. It contains several embedded performance tests, one of them being TrueCrypt AES, which measures data encryption speed using AES algorithm. Result is encryption speed in gigabytes per second.
Benchmark coverage: 13%
Core i7-3840QM outperforms Core i7-2600K by 9% in TrueCrypt AES.
WinRAR 4.0
WinRAR 4.0 is an outdated version of a popular file archiver. It contains an internal speed test, using 'Best' setting of RAR compression on large chunks of randomly generated data. Its results are measured in kilobytes per second.
Benchmark coverage: 13%
Core i7-3840QM outperforms Core i7-2600K by 35% in WinRAR 4.0.
x264 encoding pass 2
x264 Pass 2 is a slower variant of x264 video compression that produces a variable bit rate output file, which results in better quality since the higher bit rate is used when it is needed more. Benchmark result is still measured in frames per second.
Benchmark coverage: 13%
Core i7-3840QM outperforms Core i7-2600K by 5% in x264 encoding pass 2.
x264 encoding pass 1
x264 version 4.0 is a video encoding benchmark uses MPEG 4 x264 compression method to compress a sample HD (720p) video. Pass 1 is a faster variant that produces a constant bit rate output file. Its result is measured in frames per second, which means how many frames of the source video file were encoded per second.
Benchmark coverage: 13%
Core i7-3840QM outperforms Core i7-2600K by 9% in x264 encoding pass 1.
Pros & cons summary
| Performance score | 3.83 | 3.54 |
| Integrated graphics card | 1.18 | 0.66 |
| Recency | 3 September 2012 | 9 January 2011 |
| Cost | $568 | $317 |
| Chip lithography | 22 nm | 32 nm |
| Power consumption (TDP) | 45 Watt | 95 Watt |
Given the minimal performance differences, no clear winner can be declared between Core i7-3840QM and Core i7-2600K.
Be aware that Core i7-3840QM is a notebook processor while Core i7-2600K is a desktop one.
Should you still have questions on choice between Core i7-3840QM and Core i7-2600K, ask them in Comments section, and we shall answer.
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