Intel Core i7-840QM Mobile processor - BY80607002901AI / BX80607I7840QM
Core i7-840QM is an evolutionary update to i7-8xx line up of high-performance Core i7 Mobile microprocessors. The processor was released on June 20, 2010, along with two other Core i7 mobile CPUs - i7-940XM and i7-740QM. Even before the official launch, the Core i7-840QM processors were spotted in a number of announced notebooks - Dell Studio 14 and Studio 15, EUROCOM X8100 Leopard, Fujitsu Celsius H700 laptop, Lenovo Y560d notebook, and Mouse Computer Company MB-G811B and MB-G811S laptop models.
The Core i7-840QM processor is based on Clarksfield core, which integrates the following components on a single die:
- 4 microprocessors cores. Each core has its own 64KB level 1 and 256 KB level 2 caches.
- 8 MB level 3 cache, shared between all cores. The cache is inclusive, that is it also includes data cached by L1 and L2 caches of all cores.
- Integrated memory controller is used to access DDR3 memory. The controller supports single- and dual-channel memory modes. Memory bandwidth is doubled in dual-channel mode, which marginally increases CPU performance.
- Direct Media Interface is used to communicate with peripheral devices.
The Intel Core i7-840QM CPU runs at 1.86 GHz, and comes with numerious advanced features: 64-bit instruction set, SIMD instructions up from SSE to SSE4, Virtualization technology, and Vpro features (VT-d and Trusted Execution Technology). The Core i7-840QM also supports Hyper-Threading (HT) technology. This technology adds second set of general and special registers to each CPU core, which allows each core to process two threads at once, which, in turn, leads to better utilization of core resources and improved core performance.
Another useful feature is Turbo Boost technology. When the processor is operating within thermal limits, this feature temporary enhances performance by bumping processor's frequency. The frequency boost depends on the number of active cores, and for the Core i7-840QM CPU the boost can be as high as 266 MHz for 4 and 3 cores, 1067 MHz for 2 cores, and 1333 MHz for 1 core.
The core i7-840QM processor includes a few power-saving modes, that may operate on per-thread, per-core or per-package level. These modes are used to suspend one or more CPU cores for very short (microseconds) or indefinitely long periods of times. While they provide excellent power-savings capabilities, they are not useful when the cores are continiously processing data. In this case battery life can be pro-longed with the help of Enhanced SpeedStep technology, which reduces processor voltage and frequency, thus lowering CPU power consumption while the processor is still been able to run programs.
Like other Core i7 Mobile microprocessors, the i7-840QM is fabricated in 988-pin micro-PGA package, compatible wih socket 988 motherboards.
Compared with the Core i7-940XM CPU, the i7-840QM has a few advantages and disadvantages. The disadvantages are 840QM's locked clock multiplier, and lower CPU frequency. The advantages of this microprocessor are better power consumption, and slightly superior performance in Turbo Boost mode for single-threaded applications. Currently the CPU is priced at $568 - almost twice cheaper than the Core i7-940XM.
Intel Core i7-840QM specifications
|Type||CPU / Microprocessor|
|Family||Intel Core i7 Mobile|
|Model number ? ||i7-840QM|
|CPU part numbers||BY80607002901AI is an OEM/tray microprocessor|
BX80607I7840QM is a boxed microprocessor
|Frequency ? ||1867 MHz|
|Turbo frequency||3200 MHz|
|Bus speed ? ||2.5 GT/s DMI|
|Clock multiplier ? ||14|
|Package||988-pin micro-FCPGA8 (rPGA988A)|
|Socket||Socket G1 / rPGA988A|
|Size||1.48" x 1.48" / 3.75cm x 3.75cm (CPU)|
|Introduction date||June 20, 2010|
|End-of-Life date||Last order date is April 5, 2012|
Last shipment date is October 8, 2012
|Price at introduction||$568|
|Architecture / Microarchitecture|
|Processor core ? ||Clarksfield|
|Core stepping ? ||B1 (Q3SE)|
|Manufacturing process||0.045 micron|
774 million transistors
|Data width||64 bit|
|The number of cores||4|
|The number of threads||8|
|Floating Point Unit||Integrated|
|Level 1 cache size ? ||4 x 32 KB instruction caches|
4 x 32 KB data caches
|Level 2 cache size ? ||4 x 256 KB|
|Level 3 cache size||8 MB|
- MMX instructions
- SSE / Streaming SIMD Extensions
- SSE2 / Streaming SIMD Extensions 2
- SSE3 / Streaming SIMD Extensions 3
- SSSE3 / Supplemental Streaming SIMD Extensions 3
- SSE4 / SSE4.1 + SSE4.2 / Streaming SIMD Extensions 4 ?
- EM64T / Extended Memory 64 technology / Intel 64 ?
- HT / Hyper-Threading technology ?
- TBT / Turbo Boost technology ?
- VT-x / Virtualization technology ?
- VT-d / Virtualization for directed I/O
- NX / XD / Execute disable bit ?
- TXT / Trusted Execution technology
|Low power features||Enhanced SpeedStep technology ? |
|Integrated peripherals / components|
- The number of controllers: 1
Memory channels: 2
Supported memory: DDR3-1066, DDR3-1333
- Direct Media Interface
- PCI Express interface
|Electrical / Thermal parameters|
|Minimum/Maximum operating temperature ? ||0°C - 100°C|
|Thermal Design Power ? ||45 Watt|
CPUs, related to Intel Core i7-840QM
|Intel Core i7 Mobile family, Socket G1|
| Core i7-620M (PGA988)||2 / 4||2.66 GHz||3.33 GHz||4 MB||35 Watt||SSE4, AES, HT, VT, TXT, TBT|
| Core i7-640M (PGA988)||2 / 4||2.8 GHz||3.46 GHz||4 MB||35 Watt||SSE4, AES, HT, VT, TXT, TBT|
| Core i7-720QM||4 / 8||1.6 GHz||2.8 GHz||6 MB||45 Watt||SSE4, HT, VT, TXT, TBT|
| Core i7-740QM||4 / 8||1.73 GHz||2.93 GHz||6 MB||45 Watt||SSE4, HT, VT, TXT, TBT|
| Core i7-820QM||4 / 8||1.73 GHz||3.06 GHz||8 MB||45 Watt||SSE4, HT, VT, TXT, TBT|
| Core i7-840QM||4 / 8||1.86 GHz||3.2 GHz||8 MB||45 Watt||SSE4, HT, VT, TXT, TBT|
|Intel Core i7 Mobile family, Nehalem micro-architecture, Other sockets|
| Core i7-640UM||2 / 4||1.2 GHz||2.26 GHz||4 MB||18 Watt||SSE4, AES, HT, VT, TXT, TBT|
| Core i7-660UM||2 / 4||1.33 GHz||2.4 GHz||4 MB||18 Watt||SSE4, AES, HT, VT, TXT, TBT|
| Core I7-680UM||2 / 4||1.46 GHz||2.53 GHz||4 MB||18 Watt||SSE4, AES, HT, VT, TXT, TBT|
| Core i7-620LM||2 / 4||2 GHz||2.8 GHz||4 MB||25 Watt||SSE4, AES, HT, VT, TXT, TBT|
| Core i7-640LM||2 / 4||2.13 GHz||2.93 GHz||4 MB||25 Watt||SSE4, AES, HT, VT, TXT, TBT|
| Core I7-660LM||2 / 4||2.26 GHz||3.06 GHz||4 MB||25 Watt||SSE4, AES, HT, VT, TXT, TBT|
| Core i7-620M (BGA)||2 / 4||2.66 GHz||3.33 GHz||4 MB||35 Watt||SSE4, AES, HT, VT, TXT, TBT|
| Core i7-640M (BGA)||2 / 4||2.8 GHz||3.46 GHz||4 MB||37 Watt||SSE4, AES, HT, VT, TXT, TBT|
|Other families, Nehalem micro-architecture, Socket G1|
| Celeron P4500||2 / 2||1.86 GHz|| ||2 MB||35 Watt||SSE4, HT, VT, TXT, TBT|
| Celeron P4600||2 / 2||2 GHz|| ||2 MB||35 Watt||SSE4, HT, VT, TXT, TBT|
| Pentium P6200||2 / 2||2.13 GHz|| ||3 MB||35 Watt||SSE4, HT, VT, TXT, TBT|
| Pentium P6300||2 / 2||2.26 GHz|| ||3 MB||35 Watt||SSE4, HT, VT, TXT, TBT|
| Core i3-380M (PGA988)||2 / 4||2.53 GHz|| ||3 MB||35 Watt||SSE4, HT, VT, TXT, TBT|
| Core i3-390M (PGA988)||2 / 4||2.66 GHz|| ||3 MB||35 Watt||SSE4, HT, VT, TXT, TBT|
| Core i5-560M (PGA988)||2 / 4||2.66 GHz||3.2 GHz||3 MB||35 Watt||SSE4, AES, HT, VT, TXT, TBT|
| Core i5-580M (PGA988)||2 / 4||2.66 GHz||3.33 GHz||3 MB||35 Watt||SSE4, AES, HT, VT, TXT, TBT|
| Core i7-920XM||4 / 8||2 GHz||3.2 GHz||8 MB||55 Watt||SSE4, HT, VT, TXT, TBT, Unlock|
| Core i7-940XM||4 / 8||2.13 GHz||3.33 GHz||8 MB||55 Watt||SSE4, HT, VT, TXT, TBT, Unlock|
• Highlighted numbers and features indicate whether specific processor performs better or worse than Core i7-840QM
• Within each category, the CPUs are sorted from slower (at the top) to faster (at the bottom)
• List of related CPUs is not complete.
• Features abbreviations:
SSE4 - SSE4 instructions
AES - AES instructions
HT - Hyper-Threading
VT - Virtualization
TXT - Trusted Execution
TBT - Dynamic Acceleration / Turbo Boost
Unlock - Unlocked multiplier
Q: Is it possible to upgrade my Intel Core i7-840QM processor?
A: Probably yes. CPU compatibility is determined by your motherboard. Please see CPU-Upgrade.com website for CPU support list for your board.
Intel i7-840QM Overclocking
Sorry, overclocking information is not available at this time.
Intel discontinues 9 mobile Core i5 and i7 CPUs
Oct 11, 2011
: Last week Intel published Product Change Notification, informing
its customer about upcoming discontinuation of mobile microprocessors
from Calpella platform. The change affects 9 Core i5 and
Core i7 CPUs, including Core i5-560M, i5-560UM, i5-580M, Core i7-640M,
i7-660LM, i7-680UM, i7-740QM, i7-840QM, and i7-940XM. The processors
can be ordered until April 5, 2012, and they will be shipped until
New Core i7 Mobile CPUs introduced
Jun 21, 2010
: Today Intel updated CPU price list, adding three new Core i7 Mobile
microprocessors. The launch date matched our expectations, that were
based on new notebook release dates, as was explained in the last
week's "New Intel Mobile CPUs to launch next week?" story.
New Intel Mobile CPUs to launch next week?
Jun 17, 2010
: While looking for more information to update "Upcoming Core i7 Mobile
microprocessors" new story, posted 2 days ago, I stumbled on two recent
notebook announcements. Toshiba Satellite A660, A665, C640, C650,
M640, M645, L630, L640, L650, L670, T210, T230 series laptops are
going to launch this Sunday.
Upcoming Core i7 Mobile microprocessors
Jun 15, 2010
: As was reported on our site, and widely reported on the net, in the
third quarter Intel is planning to release new Core i7 Mobile
microprocessors with model number i7-740QM and i7-840QM, and Core i7
Mobile Extreme i7-940XM CPU. These models were referenced in a
recently leaked Intel mobile roadmap.
Specifications of upcoming Intel Mobile microprocessors
May 21, 2010
: Using different sources, we compiled specifications of upcoming
Intel mobile CPUs. These processors are Core i3-370M, Core i5-450M,
Core i7-740QM, Core i7-840QM and Core Extreme Edition i7-940XM. We
also discovered two Pentium Mobile models - P6000 and P6100.
You're welcome to post suggestions, corrections, your own personal
Intel Core i7-840QM review, or your experience with the microprocessor.
Please do not ask upgrade and troubleshooting questions, and do not start
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