i7-1255U vs Ryzen 7 3800X

Aggregate performance score

Ryzen 7 3800X
2019
8 cores / 16 threads, 105 Watt
14.56
+70.7%
Core i7-1255U
2022
10 cores / 12 threads, 15 Watt
8.53

Ryzen 7 3800X outperforms Core i7-1255U by an impressive 71% based on our aggregate benchmark results.

Primary details

Comparing Ryzen 7 3800X and Core i7-1255U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking495896
Place by popularitynot in top-10074
Cost-effectiveness evaluation16.44no data
Market segmentDesktop processorLaptop
SeriesAMD Ryzen 7Intel Alder Lake-M
Power efficiency13.1153.78
Architecture codenameMatisse (2019−2020)Alder Lake-U (2022)
Release date7 July 2019 (5 years ago)23 February 2022 (2 years ago)
Launch price (MSRP)$399no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Ryzen 7 3800X and Core i7-1255U basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores8 (Octa-Core)10 (Deca-Core)
Threads1612
Base clock speed3.9 GHz1.7 GHz
Boost clock speed4.5 GHz4.7 GHz
L1 cache96K (per core)80K (per core)
L2 cache512K (per core)1.25 MB (per core)
L3 cache32 MB12 MB (shared)
Chip lithography7 nm, 12 nm10 nm
Maximum core temperatureno data100 °C
Number of transistors19,200 millionno data
64 bit support++
Windows 11 compatibility++
Unlocked multiplier+-

Compatibility

Information on Ryzen 7 3800X and Core i7-1255U compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration1 (Uniprocessor)1
SocketAM4Intel BGA 1744
Power consumption (TDP)105 Watt15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 7 3800X and Core i7-1255U. You'll probably need this information if you require some particular technology.

AES-NI++
FMA-+
AVX++
Enhanced SpeedStep (EIST)no data+
TSX-+
Precision Boost 2+no data

Security technologies

Ryzen 7 3800X and Core i7-1255U technologies aimed at improving security, for example, by protecting against hacks.

TXTno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 7 3800X and Core i7-1255U are enumerated here.

AMD-V+-
VT-dno data+
VT-xno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 7 3800X and Core i7-1255U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4 Dual-channelDDR4, DDR5
Maximum memory size128 GBno data
Max memory channels2no data
Maximum memory bandwidth51.196 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card-Intel Iris Xe Graphics G7 96EUs ( - 1250 MHz)

Peripherals

Specifications and connection of peripherals supported by Ryzen 7 3800X and Core i7-1255U.

PCIe versionno data4.0
PCI Express lanesno data20

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Ryzen 7 3800X 14.56
+70.7%
i7-1255U 8.53

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Ryzen 7 3800X 23125
+70.7%
i7-1255U 13544

Gaming performance

Pros & cons summary


Performance score 14.56 8.53
Recency 7 July 2019 23 February 2022
Physical cores 8 10
Threads 16 12
Chip lithography 7 nm 10 nm
Power consumption (TDP) 105 Watt 15 Watt

Ryzen 7 3800X has a 70.7% higher aggregate performance score, 33.3% more threads, and a 42.9% more advanced lithography process.

i7-1255U, on the other hand, has an age advantage of 2 years, 25% more physical cores, and 600% lower power consumption.

The Ryzen 7 3800X is our recommended choice as it beats the Core i7-1255U in performance tests.

Note that Ryzen 7 3800X is a desktop processor while Core i7-1255U is a notebook one.


Should you still have questions on choice between Ryzen 7 3800X and Core i7-1255U, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


AMD Ryzen 7 3800X
Ryzen 7 3800X
Intel Core i7-1255U
Core i7-1255U

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Community ratings

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Questions & comments

Here you can ask a question about Ryzen 7 3800X or Core i7-1255U, agree or disagree with our judgements, or report an error or mismatch.