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Intel Core i7-720QM vs Intel Core i7-840QM

Intel Core i7-720QM

► remove from comparison Intel 720QM

The Intel Core i7 720QM is a fast quad-core CPU and slowest Core i7 quad core in 2009. It features 4 cores (quad core CPU) and Hyperthreading. Therefore, 8 threads can be worked on simultaneously. Compared to the faster Core i7 mobile CPUs, the 720QM only features 6MB L3 Cache (the faster ones 8 MB).

Because of the Turbo Mode, the CPU is clocked with up to 2.8 GHz and therefore fast for single core applications like older games. Thanks to the 4 cores (and 8 threads), modern multi-threaded applications also profit from this CPU greatly (altough when using all cores, the clock speed remains low).

The Core i7 7xx 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 power consumption of up to 45 Watt (TDP) is quite high for a laptop CPU and because of the Turbo Mode, the power consumption could reach these high values. Therefore, only large laptops with good cooling solutions can house this CPU.

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 i7-720QMIntel Core i7-840QM
Intel Core i7Intel Core i7
ClarksfieldClarksfield
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 i7-820QM compare1.73 - 3.06 GHz4 / 88 MB
Intel Core i7-740QM compare1.73 - 2.93 GHz4 / 86 MB
» Intel Core i7-720QM1.6 - 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 i7-820QM compare1.73 - 3.06 GHz4 / 88 MB
Intel Core i7-740QM compare1.73 - 2.93 GHz4 / 86 MB
Intel Core i7-720QM1.6 - 2.8 GHz4 / 86 MB
1600 - 2800 MHz1860 - 3200 MHz
25002500
256 KB256 KB
1 MB1 MB
6 MB8 MB
4 / 84 / 8
45 45
774 774
45 45
296 mm2296 mm2
RPGA989RPGA989
Architecturex86x86
$546 U.S.$568 U.S.
Intel Core i7 720QMIntel Core i7 840QM
100 °C
integrated 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: 2.58     avg: 2.9     median: 2.9 (5%)     max: 2.99 Points
min: 3.21     avg: 3.3     median: 3.3 (6%)     max: 3.45 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 2231     avg: 3109     median: 2995 (27%)     max: 3757
min: 3354     avg: 3426     median: 3438.5 (31%)     max: 3474
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
min: 7709     avg: 8760     median: 8357 (13%)     max: 10398
min: 9007     avg: 9316     median: 9266 (15%)     max: 9726
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
min: 9328     avg: 10025     median: 10161 (10%)     max: 10355 Points
min: 11085     avg: 11521     median: 11513 (11%)     max: 11857 Points
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
min: 3420     avg: 3682     median: 3714 (26%)     max: 3952 Points
min: 4083     avg: 4200     median: 4199 (30%)     max: 4319 Points
wPrime 2.10 - wPrime 2.0 1024m *
min: 463.38     avg: 804     median: 502.3 (6%)     max: 1526.44 s
min: 476.677     avg: 1014     median: 1282.4 (15%)     max: 1284.2 s
wPrime 2.10 - wPrime 2.0 32m *
min: 14.84     avg: 24.9     median: 16.6 (3%)     max: 47.736 s
min: 15.785     avg: 32     median: 40 (8%)     max: 40.2 s
3DMark 06 - CPU - 3DMark 06 - CPU
min: 2892     avg: 3098     median: 3100 (17%)     max: 3307 Points
min: 3435     avg: 3519     median: 3531.5 (20%)     max: 3577 Points
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
min: 15     avg: 15.7     median: 15.5 (3%)     max: 19 s
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: 34     avg: 36.1     median: 36 (2%)     max: 38 s
min: 29     avg: 29.4     median: 29 (1%)     max: 30.108 s
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
min: 824     avg: 868     median: 851 (4%)     max: 1026 s
min: 727.71     avg: 734     median: 737 (3%)     max: 738 s
SiSoft Sandra Dhrystone (MIPS) - SiSoft Sandra Dhrystone (MIPS)
min: 40000     avg: 43995     median: 43260 (21%)     max: 49460 MIPS
54820 MIPS (26%)
SiSoft Sandra Whetstone (MFLOPS) - SiSoft Sandra Whetstone (MFLOPS)
min: 32380     avg: 32845     median: 33000 (25%)     max: 33000 MFLOPS
38190 MFLOPS (29%)
PCMark 05 - PCMark 05 - Standard
100%
1 720QM +
min: 6074     avg: 6957     median: 6910.5 (43%)     max: 7776 Points
Windows Vista Experience Index - Windows Vista Leistungsindex - Prozessor
100%
1 720QM +
7 Points (100%)
Windows 7 Experience Index - Win7 CPU
min: 6.9     avg: 7     median: 7 (90%)     max: 7.1 Points
7.2 Points (92%)
3DMark Vantage - 3DM Vant. Perf. CPU no Physx
min: 5822     avg: 10413     median: 10663 (12%)     max: 11155 Points
min: 12224     avg: 14498     median: 12238 (14%)     max: 19033 Points
3DMark 11 - 3DM11 Performance Physics
3936 Points (14%)
4686 Points (17%)

Average Benchmarks Intel Core i7-720QM → 100% n=16

Average Benchmarks Intel Core i7-840QM → 109% n=16

- 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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v1.16
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#3 did not recreate cache, as it is less than 5 days old! Created at Mon, 20 Sep 2021 13:09:15 +0200 +0s ... 0s

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#6 getting avg benchmarks for device 519 +0.001s ... 0.009s

#7 got single benchmarks 519 +0.077s ... 0.086s

#8 getting avg benchmarks for device 975 +0s ... 0.086s

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#10 got avg benchmarks for devices +0s ... 0.095s

#11 min, max, avg, median took s +0.014s ... 0.109s

#12 return log +0.004s ... 0.113s

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Redaktion, 2017-09- 8 (Update: 2017-09-11)