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Intel Core i7-840QM vs Intel Core i7-940XM

Intel Core i7-840QM

► remove from comparison Intel 840QM

The Intel Core i7 840QM is a high end quad core CPU in 2010. It features 4 cores (quad core CPU) and Hyperthreading. Therefore, 8 threads can be worked on simultaneously.

Because of the Turbo Mode, the CPU is clocked with up to 3.2 GHz (if only one core is used, 2.93 for two cores, and 2 ghz with 4 cores) and therefore can perform very well in single core applications like older games.

The Core i7 line has an integrated memory controller for DDR3 bars (1066 or 1333) supporting a maximum of 8 GB. Therefore, the memory performance is very good (compared to older CPUs with external memory controllers). Still, this also leads to the higher TDP of the whole chip. ECC memory is not supported by the 840QM.

The Core micro-architecture is still very similar to the one used in the Core 2 CPUs, therefore the performance per MHz (neglecting the integrated memory controller, hyperthreading and Turbo Boost) is similar.

The power consumption of up to 45 Watt (TDP) is quite high for a laptop CPU and because of the Turbo Mode, the power consumption should reach these high values. Therefore, the CPU is only suited for large laptops.

Intel Core i7-940XM

► remove from comparison Intel 940XM

The Intel Core i7 940XM Extreme Edition is a high-end processor  the fastest laptop processor at the time of announcement. It features 4 cores (quad core CPU) and Hyperthreading. Therefore, 8 threads can be worked on simultaneously.

Because of the Turbo Mode, the CPU is clocked with up to 3.3 GHz in single threaded applications. Using two cores, the CPU can clock up to 3.2 GHz and using all 4 cores, 2.4 GHz is the maximum clock rate. Therefore, even older games (single threaded) should run fluently with this mobile CPU altough the base clock speed is rather slow. The 940XM should provide enough power for all modern games and applications (in 2010).

The Core i7 9xx line has an integrated memory controller for DDR3 bars (1066 or 1333).Therefore, the memory performance is very good (compared to older CPUs with external memory controllers). Still this also leads to the higher TDP of the whole chip.

Core architecture is still very similar to the one used in the Core 2 CPUs.

The power consumption of up to 55 Watt (TDP) is quite high for a laptop CPU and because of the Turbo Mode, the power consumption should reach these high values.

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ModelIntel Core i7-840QMIntel Core i7-940XM
SeriesIntel Core i7Intel Core i7
CodenameClarksfieldClarksfield
Series: Core i7 Clarksfield
Intel Core i7-940XM2.13 - 3.33 GHz4 / 8 cores8 MB L3
Intel Core i7-920XM compare2 - 3.2 GHz4 / 8 cores8 MB L3
Intel Core i7-840QM « 1.86 - 3.2 GHz4 / 8 cores8 MB L3
Intel Core i7-820QM compare1.73 - 3.06 GHz4 / 8 cores8 MB L3
Intel Core i7-740QM compare1.73 - 2.93 GHz4 / 8 cores6 MB L3
Intel Core i7-720QM compare1.6 - 2.8 GHz4 / 8 cores6 MB L3
Intel Core i7-940XM « 2.13 - 3.33 GHz4 / 8 cores8 MB L3
Intel Core i7-920XM compare2 - 3.2 GHz4 / 8 cores8 MB L3
Intel Core i7-840QM1.86 - 3.2 GHz4 / 8 cores8 MB L3
Intel Core i7-820QM compare1.73 - 3.06 GHz4 / 8 cores8 MB L3
Intel Core i7-740QM compare1.73 - 2.93 GHz4 / 8 cores6 MB L3
Intel Core i7-720QM compare1.6 - 2.8 GHz4 / 8 cores6 MB L3
Clock1860 - 3200 MHz2130 - 3333 MHz
FSB25002500
L1 Cache256 KB256 KB
L2 Cache1 MB1 MB
L3 Cache8 MB8 MB
Cores / Threads4 / 84 / 8
TDP45 Watt55 Watt
Transistors774 Million774 Million
Technology45 nm45 nm
Die Size296 mm2296 mm2
max. Temp.100 °C100 °C
SocketRPGA989RPGA989
Featuresintegrated DDR3-1066/1333 dual-channel memory controller, Turbo Boost, Hyper Threading, Virtualization Technology VT-x / VT-d, Trusted Execution Technology, Intel 64, Idel States, Enhanced Speedstep, Thermal Monitoring, Execute Disable Bit2.5 GT/s DMI, Virtualization Technology, Execute Disable Bit, Enahnced Speedstep Technology, Enhanced Halt State (C1E), 64, Turbo Boost (max. 3.33 GHz), Hyper-Threading, Trusted Execution Technology
Architecturex86x86
$568 U.S.$1096 U.S.
Announced
Manufacturerark.intel.comark.intel.com

Benchmarks

Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 3.21     avg: 3.3     median: 3.3 (4%)     max: 3.45 Points
min: 3.65     avg: 3.9     median: 3.9 (5%)     max: 4.05 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 3354     avg: 3426     median: 3438.5 (21%)     max: 3474 Points
3630 Points (22%)
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
min: 9007     avg: 9316     median: 9266 (7%)     max: 9726 Points
11391 Points (8%)
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
min: 11085     avg: 11521     median: 11513 (8%)     max: 11857 Points
min: 12642     avg: 13381     median: 13381 (9%)     max: 14120 Points
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
min: 4083     avg: 4200     median: 4199 (5%)     max: 4319 Points
min: 4479     avg: 4488     median: 4488 (5%)     max: 4497 Points
wPrime 2.10 - wPrime 2.0 1024m *
min: 476.7     avg: 1014     median: 1282 (15%)     max: 1284 s
min: 374     avg: 798     median: 798 (9%)     max: 1222 s
wPrime 2.10 - wPrime 2.0 32m *
min: 15.78     avg: 32     median: 40 (8%)     max: 40.2 s
min: 12     avg: 25.2     median: 25.2 (5%)     max: 38.36 s
3DMark 06 - CPU - 3DMark 06 - CPU
min: 3435     avg: 3519     median: 3531.5 (8%)     max: 3577 Points
min: 3884     avg: 4080     median: 4064 (9%)     max: 4293 Points
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
min: 13     avg: 13.1     median: 13 (3%)     max: 13.26 s
12 s (3%)
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
min: 29     avg: 29.4     median: 29 (1%)     max: 30.11 s
28 s (1%)
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
min: 728     avg: 734     median: 737 (3%)     max: 738 s
min: 699     avg: 700     median: 700 (3%)     max: 701 s
SiSoft Sandra Dhrystone (MIPS) - SiSoft Sandra Dhrystone (MIPS)
54820 MIPS (26%)
62380 MIPS (30%)
SiSoft Sandra Whetstone (MFLOPS) - SiSoft Sandra Whetstone (MFLOPS)
38190 MFLOPS (29%)
40660 MFLOPS (31%)
Windows 7 Experience Index - Win7 CPU
7.2 Points (92%)
7.3 Points (94%)
3DMark Vantage - 3DM Vant. Perf. CPU no Physx
min: 12224     avg: 14498     median: 12238 (11%)     max: 19033 Points
13326 Points (12%)
3DMark 11 - 3DM11 Performance Physics
100%
1 840QM +
4686 Points (13%)

Average Benchmarks Intel Core i7-840QM → 100% n=15

Average Benchmarks Intel Core i7-940XM → 108% n=15

- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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show all (including archived), 2024, 2023
v1.26
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Redaktion, 2017-09- 8 (Update: 2023-07- 1)