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Intel Core i7-820QM vs Intel Core i7-840QM

Intel Core i7-820QM

► remove from comparison Intel 820QM

The Intel Core i7 820QM is a high end quad core CPU in 2009. 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 3.06 GHz 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). 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.

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 i7-840QM

► 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.

ModelIntel Core i7-820QMIntel Core i7-840QM
SeriesIntel Core i7Intel Core i7
CodenameClarksfieldClarksfield
Series: Core i7 Clarksfield
Intel Core i7-940XM compare2.13 - 3.33 GHz4 / 88 MB
Intel Core i7-920XM compare2 - 3.2 GHz4 / 88 MB
Intel Core i7-840QM1.86 - 3.2 GHz4 / 88 MB
» Intel Core i7-820QM1.73 - 3.06 GHz4 / 88 MB
Intel Core i7-740QM compare1.73 - 2.93 GHz4 / 86 MB
Intel Core i7-720QM compare1.6 - 2.8 GHz4 / 86 MB
Intel Core i7-940XM compare2.13 - 3.33 GHz4 / 88 MB
Intel Core i7-920XM compare2 - 3.2 GHz4 / 88 MB
» Intel Core i7-840QM1.86 - 3.2 GHz4 / 88 MB
Intel Core i7-820QM1.73 - 3.06 GHz4 / 88 MB
Intel Core i7-740QM compare1.73 - 2.93 GHz4 / 86 MB
Intel Core i7-720QM compare1.6 - 2.8 GHz4 / 86 MB
Clock1730 - 3060 MHz1860 - 3200 MHz
FSB25002500
L1 Cache256 KB256 KB
L2 Cache1 MB1 MB
L3 Cache8 MB8 MB
Cores / Threads4 / 84 / 8
TDP45 Watt45 Watt
Transistors774 Million774 Million
Technology45 nm45 nm
Die Size296 mm2296 mm2
max. Temp.100 °C100 °C
SocketRPGA989RPGA989
Architecturex86x86
$546 U.S.$568 U.S.
Announced
ManufacturerIntel Core i7 820QMIntel Core i7 840QM
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 Bit

Benchmarks

Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 2.95     avg: 3.1     median: 3 (5%)     max: 3.44 Points
min: 3.21     avg: 3.3     median: 3.3 (6%)     max: 3.45 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 3075     avg: 3457     median: 3271.5 (29%)     max: 4185 Points
min: 3354     avg: 3426     median: 3438.5 (31%)     max: 3474 Points
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
min: 8341     avg: 9174     median: 8559 (12%)     max: 11966 Points
min: 9007     avg: 9316     median: 9266 (13%)     max: 9726 Points
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
min: 10222     avg: 10498     median: 10317 (9%)     max: 11311 Points
min: 11085     avg: 11521     median: 11513 (10%)     max: 11857 Points
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
min: 3709     avg: 3952     median: 3987 (24%)     max: 4101 Points
min: 4083     avg: 4200     median: 4199 (26%)     max: 4319 Points
wPrime 2.10 - wPrime 2.0 1024m *
min: 424     avg: 1140     median: 1361.5 (16%)     max: 1412 s
min: 476.7     avg: 1014     median: 1282 (15%)     max: 1284 s
wPrime 2.10 - wPrime 2.0 32m *
min: 13.73     avg: 35.2     median: 42 (8%)     max: 43 s
min: 15.78     avg: 32     median: 40 (8%)     max: 40.2 s
3DMark 06 - CPU - 3DMark 06 - CPU
min: 3053     avg: 3226     median: 3149 (7%)     max: 3629 Points
min: 3435     avg: 3519     median: 3531.5 (8%)     max: 3577 Points
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
14 s (3%)
min: 13     avg: 13.1     median: 13 (3%)     max: 13.26 s
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
min: 31     avg: 31.7     median: 32 (1%)     max: 32 s
min: 29     avg: 29.4     median: 29 (1%)     max: 30.11 s
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
min: 765     avg: 787     median: 780 (3%)     max: 817 s
min: 728     avg: 734     median: 737 (3%)     max: 738 s
SiSoft Sandra Dhrystone (MIPS) - SiSoft Sandra Dhrystone (MIPS)
100%
1 840QM +
54820 MIPS (26%)
SiSoft Sandra Whetstone (MFLOPS) - SiSoft Sandra Whetstone (MFLOPS)
100%
1 840QM +
38190 MFLOPS (29%)
PCMark 05 - PCMark 05 - Standard
100%
1 820QM +
7734 Points (49%)
Windows 7 Experience Index - Win7 CPU
min: 7.1     avg: 7.2     median: 7.2 (92%)     max: 7.2 Points
7.2 Points (92%)
3DMark Vantage - 3DM Vant. Perf. CPU no Physx
min: 10851     avg: 11570     median: 11251.5 (11%)     max: 12631 Points
min: 12224     avg: 14498     median: 12238 (12%)     max: 19033 Points
3DMark 11 - 3DM11 Performance Physics
4002 Points (14%)
4686 Points (16%)

Average Benchmarks Intel Core i7-820QM → 100% n=14

Average Benchmarks Intel Core i7-840QM → 106% n=14

- 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), 2022, 2021
v1.17
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> Notebook / Laptop Reviews and News > Benchmarks / Tech > Processor Comparison - Head 2 Head
Redaktion, 2017-09- 8 (Update: 2017-09-11)