Intel Core i7 7740X vs Intel Core i9 7900X
We compared two desktop CPUs: Intel Core i7 7740X with 4 cores 4.3GHz and Intel Core i9 7900X with 10 cores 3.3GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.
Main Differences
Intel Core i7 7740X 's Advantages
Higher base frequency (4.3GHz vs 3.3GHz)
Lower TDP (112W vs 140W)
Intel Core i9 7900X 's Advantages
Larger memory bandwidth (79.47GB/s vs 42.7GB/s)
Larger L3 cache size (14MB vs 8MB)
Score
Benchmark
Geekbench 6 Single Core
Intel Core i7 7740X
+17%
1553
Intel Core i9 7900X
1323
Geekbench 6 Multi Core
Intel Core i7 7740X
5516
Intel Core i9 7900X
+54%
8536
Geekbench 5 Single Core
Intel Core i7 7740X
+14%
1291
Intel Core i9 7900X
1127
Geekbench 5 Multi Core
Intel Core i7 7740X
5001
Intel Core i9 7900X
+103%
10189
Passmark CPU Single Core
Intel Core i7 7740X
+7%
2759
Intel Core i9 7900X
2556
Passmark CPU Multi Core
Intel Core i7 7740X
9824
Intel Core i9 7900X
+113%
20991
General Parameters
May 2017
Release Date
May 2017
Intel
Manufacturer
Intel
Desktop
Type
Desktop
x86-64
Instruction Set
x86-64
Kaby Lake
Core Architecture
Skylake
i7-7740X
Processor Number
i9-7900X
LGA-2066
Socket
LGA-2066
N/A
Integrated Graphics
N/A
Package
14 nm
Manufacturing Process
14 nm
112 W
Power Consumption
140 W
100 °C
Peak Operating Temperature
95 °C
CPU Performance
4
Performance Cores
10
8
Performance Core Threads
20
4.3 GHz
Performance Core Base Frequency
3.3 GHz
4.5 GHz
Performance Core Turbo Frequency
4.3 GHz
4
Total Core Count
10
8
Total Thread Count
20
-
Bus Frequency
100 MHz
43x
Multiplier
33x
64 K per core
L1 Cache
64 K per core
256 K per core
L2 Cache
1 MB per core
8 MB shared
L3 Cache
14 MB shared
Yes
Unlocked Multiplier
Yes
Memory Parameters
DDR4-2666
Memory Types
DDR4-2666
64 GB
Max Memory Size
128 GB
2
Max Memory Channels
4
42.7 GB/s
Max Memory Bandwidth
79.47 GB/s
No
ECC Memory Support
No
Miscellaneous
3.0
PCIe Version
3.0
16
PCIe Lanes
44
SSE4.1, SSE4.2, AVX-2
Extended Instruction Set
SSE4.1, SSE4.2, AVX-2, AVX-512
