Intel Core i7-1255U vs Intel Core i7-7900X

Processor comparisons 10-01-2022

   Perhaps you can't decide which CPU to buy, you can make a decision after reading the full tests Intel Core i7-1255U vs Intel Core i7-7900X and understand which is better for games or normal use for video editing, programming, rendering, streaming, machine learning. Here is useful information from various benchmarks or real streaming and video editing tests. A step-by-step analysis of all the specifications, to make it easier to read, is summarized in the table.
   From the video comparison, you can get the results of parallel examination in special testing software like PassMark, Cinebench 23 (20, 15), UserBenchmark, Furmark, Blender, Handbrake, PCMark 10, 3DMark, Dolphin Emulator, RealBench, MATLAB, DaVinci Resolve Studio, GeekBench 6, 5.2, Blender, VeraCrypt, Prime95, AIDA64, World of Tanks enCore Benchmark, WPrime, Gears 5, 7zip, SuperPi.
   Gaming performance of CPUs in:

Call of Duty: Warzone and Modern Warfare
Death Stranding
Valheim
Last Man Standing
Overwatch
Cyberpunk 2077
World of Warcraft: Shadowlands
Red Dead Redemption 2
Halo Infinite
Valorant
Apex Legends
Fortnite
Watch Dogs Legion
DOOM: Eternal
Grand Theft Auto V
Assassin's Creed Valhalla
Borderlands 3
Fallout 76
Rainbow Six Siege

After reading the results of parallel benchmarks and videos, you already be able to figure out which CPU is better to buy for gaming Intel Core i7-7900X or Intel Core i7-1255U.

Summary benchmark results

As a percentage of the maximum value based on a sample from the entire base of all processors
Processor Benchmark

Core i7-1255U

55%

Core i7-7900X

55%

Gaming performance
Summary result of all game benchmarks.

Core i7-1255U

54%

Core i7-7900X

57%

For the maximum in this test, the results of the most powerful processor in the site database are taken. And it is clear that this is a server processor, on which no one will play games. Because the cost of this processor reaches several tens of thousands of dollars. And if it seems to you that the selected CPU has a small game result, just look at the FPS that it produces in real games in the summary table below.
List of less popular games in which processors were compared: Forza Horizon 4, Half-Life: Alyx, Metro Exodus, NBA 2K20, Control, Hitman 3, Resident Evil 7 Biohazard, PlayerUnknown's Battlegrounds (PUBG), Ghostrunner, League of Legends (LOL), The Witcher 3: Wild Hunt, Counter-Strike: Global Offensive (CS GO), Shadow of the Tomb Raider, Monster Hunter World, DOTA 2A, Battlefield V, Horizon Zero Dawn, Microsoft Flight Simulator.

Gaming benchmark

Fortnite	95.1	100.5
Valorant	108.1	114.2
Cyberpunk 2077	60.5	63.9
Apex Legends	101.6	107.3
Call of Duty Warzone	81.0	85.6
Overwatch	87.5	92.5
Red Dead Redemption 2	74.6	78.8
DOOM Eternal	54.0	57.1
Warzone	84.3	89.1
Assassin's Creed	90.8	95.9
Valheim	89.7	94.8

The numbers in this table indicate the maximum FPS that was received on the device with the corresponding processor. Depending on the configuration of the computer (RAM size and Video Card) and graphics quality settings (Ultra, Medium, Normal), the results may differ quite significantly. We recommend that you better study the results of the Cinebench, GeekBench and Passmark becnmarks.
The computers that were in the comparisons not only did they have different video cards and different amounts of RAM. But users also tested them at different screen resolutions: 4K, 2K or FullHD. So the game benchmark data is approximate. But all video cards met the average system requirements of games. To be sure exactly how much performance the processor will be in games, if you compare it in one assembly with the video card that is installed in your computer.

Power consumption

Core i7-1255U

278%

Core i7-7900X

32%

To make a finishing resolution on which processor is better, you should also consider the generation of its core. The newer the processor generation, the better its performance in games and benchmarks, as well as its energy efficiency. In this case the Core i7-1255U is more energy efficient than the Core i7-7900X as it consumes less power: 15W vs. 140W. Power consumption is particularly important for laptops. And TDP should be taken into account when choosing a processor cooling system. It is necessary to count so that the TDP data specified in the cooler specification is greater than the TDP of the compared processor.

Software benchmarks

Let's say you want to use the processor not only for gaming, but also for machine learning, programming, streaming, video editing or video rendering, then the main parameter for you is its performance in multi-threaded mode. In this mode, to achieve maximum efficiency, the processor turns on all cores and threads that it has. You will find out this data from the benchmark tables below. Before you take into account the data from these tests, be sure to make sure that the software that you are going to use on your computer can work in multi-threaded mode. Because there are still many programs that use only one core to run, and all the advantages of multi-core mode turns out to be unnecessary.

Cinebench 23, 20 an 15
The results of this benchmark show Single-threaded and Multi-threaded CPU performance

	Intel Core i7-1255U	Intel Core i7-7900X
Cinbench 15 Single-core	230	225
Cinbench 15 Multi-core	1691	2318
Cinbench 20 Single-core	554	518
Cinbench 20 Multi-core	3839	5234
Cinbench 23 Single-core	1297	1295
Cinbench 23 Multi-core	12654	12538

Passmark
This popular benchmark displays Multi-threaded and Single-threaded processor performance

	Intel Core i7-1255U	Intel Core i7-7900X
Single-Core	3035	2583
Multi-Core	17715	19299

GeekBench 6, 5.2
This benchmark shows Multi-threaded and Single-threaded processor performance

	Intel Core i7-1255U	Intel Core i7-7900X
Single-Core	1251	1370
Multi-Core	6947	12235

Comparison of specifications

In the specification comparison table, the processor release date and overclocking capability will be the most helpful. The later the processor is released, the longer it will last you. And the easier it will be to upgrade the system in the future. The same benefits from the presence of overclocking. If the processor can be overclocked, increasing its performance, then it will continue to maintain maximum FPS in new games. Accordingly, you do not need to buy a new CPU to enjoy the games any longer. The economy are obvious!

	Intel Core i7-1255U	Intel Core i7-7900X
Announcement date	January 07, 2022	April 01, 2017
Type	Laptop	Desktop
Socket	FCBGA1744	FCLGA2066
Core name	Alder Lake-U	Skylake
Architecture	x86	x86
Generation	12	7
Turbo Frequency	4.7 MHz	4.3 MHz
Frequency	1.7 MHz	3.3 MHz
Cores	10	10
Threads	12	20
Bus rate	8 GT/s	8 GT/s
Bit	64	64
Lithography	10 nm	14 nm
Transistors count	9800 millions	8400 millions
Power consumption (TDP)	15 W	140 W
Memory type	Up to DDR5 4800 MT/s Up to DDR4 3200 MT/s Up to LPDDR5 5200 MT/s Up to LPDDR4x 4267 MT/s	DDR4-2666
Max. Memory	64 Gb	128 Gb
Memory Frequency
Memory bandwidth	45.8 GB/s	85 GB/s
L1 cache
L2 cache
L3 cache	24 MB	13.75 MB
Overclocking	No	No
Supports ECC	No	No
Part number

In this comparison block, you should pay attention to the differences in clock speed and the number of cores. Here Core i7-7900X is 48% better than Core i7-1255U in terms of CPU frequency. Also keep in mind that high CPU frequency affects battery life through power consumption (relevant for laptops).

Result:
The number of parameters for which Intel Core i7-1255U is better: 12
The number of parameters for which Intel Core i7-7900X is better: 20
Although it should be realized that all the data in the table above do not mean that you should be guided entirely by them and trust a simple quantitative comparison. Better to watch benchmarks video and read the opinion of of people who bought Intel Core i7-1255U and Intel Core i7-7900X before making a selection which of the processors to buy for gaming.

Intel Core i7-1255U - all data

• Cinebench r15 score
• Cinebench r20 score
• Cinebench r23 score
• GeekBench 6, 5.2 score

• Intel Core i7-1255U specs and review.

Intel Core i7-7900X - all data

• Cinebench r15 score
• Cinebench r20 score
• Cinebench r23 score
• GeekBench 6, 5.2 score

• Intel Core i7-7900X specs and review.