Ryzen 9 7900X vs Core i7-1255U

Primary details

Comparing Core i7-1255U and Ryzen 9 7900X processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	803	103
Place by popularity	89	not in top-100
Cost-effectiveness evaluation	no data	64.43
Market segment	Laptop	Desktop processor
Series	Intel Alder Lake-M	no data
Architecture codename	Alder Lake-U (2022)	Raphael (Zen4)
Release date	23 February 2022 (2 years ago)	27 September 2022 (1 year ago)
Current price	no data	$535

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-1255U and Ryzen 9 7900X 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 cores	10 (Deca-Core)	12 (Dodeca-Core)
Threads	12	24
Base clock speed	1.7 GHz	4.7 GHz
Boost clock speed	4.7 GHz	5.6 GHz
L1 cache	80K (per core)	64K (per core)
L2 cache	1.25 MB (per core)	1 MB (per core)
L3 cache	12 MB (shared)	64 MB (shared)
Chip lithography	Intel 7 nm	5 nm
Die size	no data	2x 70 (CCD) mm2 + 122 (I/O) mm2
Maximum core temperature	100 °C	95 °C
Maximum case temperature (TCase)	no data	47 °C
Number of transistors	no data	CCD: 6,5 Mrd + IOD: 3,4 Mrd Million
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	No	Yes

Compatibility

Information on Core i7-1255U and Ryzen 9 7900X 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 configuration	1	1
Socket	FCBGA1744	AM5
Power consumption (TDP)	15 Watt	170 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-1255U and Ryzen 9 7900X. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	5 nm (CCD), 6 nm (I/O) nm, 0.650 - 1.475V
AES-NI	+	+
FMA	+	no data
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data
Speed Shift	+	no data
Hyper-Threading Technology	+	no data
TSX	+	no data
Thermal Monitoring	+	no data
Flex Memory Access	+	no data
Status	Launched	no data

Security technologies

Core i7-1255U and Ryzen 9 7900X technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data
Secure Key	+	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-1255U and Ryzen 9 7900X are enumerated here.

AMD-V	no data	+
VT-d	+	no data
VT-x	+	no data
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-1255U and Ryzen 9 7900X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4, DDR5	DDR5-5200
Maximum memory size	64 GB	no data
Max memory channels	2	no data
ECC memory support	-	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® Iris® Xe Graphics eligible	AMD Radeon Graphics (Ryzen 7000)
Quick Sync Video	+	no data
Graphics max frequency	1.25 GHz	no data
Execution Units	96	no data

Graphics interfaces

Available interfaces and connections of Core i7-1255U and Ryzen 9 7900X integrated GPUs.

Number of displays supported

4

no data

Graphics image quality

Maximum display resolutions supported by Core i7-1255U and Ryzen 9 7900X integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	4096 x 2304 @ 60Hz	no data
Max resolution over eDP	4096 x 2304 @ 120Hz	no data
Max resolution over DisplayPort	7680 x 4320 @ 60Hz	no data

Graphics API support

APIs supported by Core i7-1255U and Ryzen 9 7900X integrated GPUs, sometimes API versions are included.

DirectX	12.1	no data
OpenGL	4.6	no data

Peripherals

Specifications and connection of peripherals supported by Core i7-1255U and Ryzen 9 7900X.

PCIe version	4.0	5.0
PCI Express lanes	20	24

Synthetic benchmark performance

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

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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 9 7900X outperforms Core i7-1255U by 277% based on our aggregate benchmark results.

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Pros & cons summary

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Performance score	8.89	33.52
Recency	23 February 2022	27 September 2022
Physical cores	10	12
Threads	12	24
Power consumption (TDP)	15 Watt	170 Watt

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Should you still have questions on choice between Core i7-1255U and Ryzen 9 7900X, ask them in Comments section, and we shall answer.

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