Notebookcheck Logo

AMD Ryzen 7 7840U

AMD R7 7840U

The AMD Ryzen 7 7840U is a fast high-end laptop processor of the Phoenix series and fastest model of the U-series. It offers 8 cores (octa core) based on the Zen 4 architecture that supports hyperthreading (16 threads). The cores clock from 3.3 (base) up to 5.1 GHz (single core boost). The processor includes 8 MB L2 cache and 16 MB L3 cache.

The performance of the R7 7840U is, depending on the workload, only slightly below the Ryzen 7 7840HS (higher base clock speed and TDP). Compared to the previous generation Ryzen 7 PRO 6850U, the 7840U is clearly faster thanks to the Zen 4 architecture and higher clock speeds.

The chip integrates a modern and fasts RDNA 3 graphics card (iGPU) called Radeon 780M with 12 CUs and up to 2.7 GHz clock speed. Furthermore, the Phoenix series include a video engine with AV1 de- and encoding, a new Xilinx FPGA based XDNA AI accelerator (Ryzen AI) that should be faster than the AI engine in the Apple M2 SOC and a dual-channel DDR5-5600 / LPDDR5x-7500 memory controller (with ECC support). The connectivity features includes 2 possible USB 4 (40 Gbps) ports and 20 PCIe 4.0 lanes for a GPU and SSDs.

The Phoenix series uses a single monolithic design (unlike the chiplet design of the 7045HX series) and is manufactured in the modern 4nm process at TSMC. The TDP can be configured between 15 and 30 Watt (28 Watt default).

SeriesAMD Phoenix (Zen 4, Ryzen 7040)
CodenamePhoenix (Zen 4)

Series: Phoenix (Zen 4, Ryzen 7040) Phoenix (Zen 4)

AMD Ryzen 7 PRO 7840U compare3.3 - 5.1 GHz8 / 16 cores16 MB L3
AMD Ryzen 7 7840U « 3.3 - 5.1 GHz8 / 16 cores16 MB L3
AMD Ryzen Z1 Extreme compare3.3 - 5.1 GHz8 / 16 cores16 MB L3
Clock Rate3300 - 5100 MHz
Level 1 Cache512 KB
Level 2 Cache8 MB
Level 3 Cache16 MB
Number of Cores / Threads8 / 16
Power Consumption (TDP = Thermal Design Power)15 Watt
Manufacturing Technology4 nm
Die Size178 mm2
Max. Temperature100 °C
GPUAMD Radeon 780M ( - 2700 MHz)
64 Bit64 Bit support
Architecturex86
Announcement Date05/03/2023
Product Link (external)AMD Phoenix (Zen 4, Ryzen 7040) R7 7840U

Benchmarks

Performance Rating - CB R15 + R20 + 7-Zip + X265 + Blender + 3DM11 CPU
44.2 pt (65%)
Cinebench R23 - Cinebench R23 Multi Core
min: 11829     avg: 12107     median: 12107 (20%)     max: 12385 Points
Cinebench R23 - Cinebench R23 Single Core
min: 1581     avg: 1651     median: 1651 (73%)     max: 1721 Points
Cinebench R20 - Cinebench R20 CPU (Single Core)
min: 611     avg: 640     median: 640 (74%)     max: 669 Points
Cinebench R20 - Cinebench R20 CPU (Multi Core)
min: 4722     avg: 4788     median: 4787.5 (20%)     max: 4853 Points
Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 1874     avg: 1934     median: 1934 (20%)     max: 1994 Points
01002003004005006007008009001000110012001300140015001600170018001900Tooltip
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
min: 250     avg: 257     median: 257 (78%)     max: 264 Points
7-Zip 18.03 - 7-Zip 18.03 Multli Thread 4 runs
min: 53198     avg: 54758     median: 54757.5 (34%)     max: 56317 MIPS
7-Zip 18.03 - 7-Zip 18.03 Single Thread 4 runs
min: 5782     avg: 5873     median: 5873 (70%)     max: 5964 MIPS
HWBOT x265 Benchmark v2.2 - HWBOT x265 4k Preset
min: 14.6     avg: 14.7     median: 14.7 (32%)     max: 14.8 fps
01234567891011121314151617Tooltip
Blender - Blender 3.3 Classroom CPU *
min: 421     avg: 427.5     median: 427.5 (5%)     max: 434 Seconds
Blender - Blender 2.79 BMW27 CPU *
min: 257     avg: 259.5     median: 259.5 (2%)     max: 262 Seconds
R Benchmark 2.5 - R Benchmark 2.5 *
min: 0.4651     avg: 0.5     median: 0.5 (10%)     max: 0.48 sec
3DMark 11 - 3DM11 Performance Physics
min: 14235     avg: 16337     median: 16337 (44%)     max: 18439 Points
3DMark - 3DMark Fire Strike Standard Physics
min: 18379     avg: 20319     median: 20319 (37%)     max: 22259 Points
3DMark - 3DMark Time Spy CPU
min: 6601     avg: 7526     median: 7525.5 (37%)     max: 8450 Points
Geekbench 6.1 - 6.2 - Geekbench 6.2 Single-Core
min: 2283     avg: 2336     median: 2336 (76%)     max: 2389 points
Geekbench 6.1 - 6.2 - Geekbench 6.2 Multi-Core
min: 7310     avg: 9146     median: 9146 (43%)     max: 10982 points
Geekbench 5.2 - 5.5 - Geekbench 5.1 - 5.4 64 Bit Single-Core
min: 1652     avg: 1688     median: 1687.5 (73%)     max: 1723 points
Geekbench 5.2 - 5.5 - Geekbench 5.1 - 5.4 64 Bit Multi-Core
min: 7399     avg: 8632     median: 8631.5 (30%)     max: 9864 points
Mozilla Kraken 1.1 - Kraken 1.1 Total Score *
min: 516     avg: 533     median: 533 (1%)     max: 550 ms
WebXPRT 4 - WebXPRT 4 Score
min: 196.4     avg: 215.7     median: 215.7 (64%)     max: 235 Points
WebXPRT 3 - WebXPRT 3 Score
min: 235     avg: 266.5     median: 266.5 (56%)     max: 298 Points
CrossMark - CrossMark Overall
min: 1256     avg: 1400     median: 1400 (54%)     max: 1544 Points
Power Consumption - Prime95 Power Consumption - external Monitor *
33.1 Watt (6%)
05101520253035Tooltip
Power Consumption - Cinebench R15 Multi Power Consumption - external Monitor *
36.2 Watt (8%)
0510152025303540Tooltip
Power Consumption - Idle Power Consumption - external Monitor *
3.4 Watt (3%)
00.20.50.70.91.21.41.61.82.12.32.52.833.23.53.73.94.14.4Tooltip
Power Consumption - Idle Power Consumption 150cd 1min *
4.1 Watt (5%)
012345Tooltip
Power Consumption - Cinebench R15 Multi Power Efficiency - external Monitor
55.1 Points per Watt (41%)
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

Add one or more devices and compare

In the following list you can select (and also search for) devices that should be added to the comparison. You can select more than one device.

restrict list: