Ryzen 9 7945HX vs i5-655K

Place in the ranking	2300	111
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Laptop
Power efficiency	1.65	59.17
Architecture codename	Clarkdale (2010−2011)	Dragon Range-HX (Zen 4) (2023−2024)
Release date	30 May 2010 (14 years ago)	4 January 2023 (1 year ago)

Detailed specifications

Core i5-655K and Ryzen 9 7945HX 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	2 (Dual-core)	16 (Hexadeca-Core)
Threads	4	32
Base clock speed	3.2 GHz	2.5 GHz
Boost clock speed	3.46 GHz	5.4 GHz
Bus rate	2.5 GT/s	no data
L1 cache	64 KB (per core)	64K (per core)
L2 cache	256 KB (per core)	1 MB (per core)
L3 cache	4 MB (shared)	64 MB (shared)
Chip lithography	32 nm	CCD = 5 nm, I/O = 6 nm
Die size	81 mm²	2x 71 mm²
Maximum core temperature	73 °C	100 °C
Number of transistors	382 million	13,140 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	+	+

Compatibility

Information on Core i5-655K and Ryzen 9 7945HX 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	FCLGA1156	FL1
Power consumption (TDP)	73 Watt	55 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-655K and Ryzen 9 7945HX. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME
AES-NI	+	+
FMA	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	1.0	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Demand Based Switching	-	no data
PAE	36 Bit	no data
FDI	+	no data
Precision Boost 2	no data	+

Security technologies

Core i5-655K and Ryzen 9 7945HX technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-655K and Ryzen 9 7945HX are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-655K and Ryzen 9 7945HX. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR5
Maximum memory size	16.38 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	21 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card Compare	Intel HD Graphics for Previous Generation Intel Processors	AMD Radeon 610M (400 - 2200 MHz)
Clear Video HD	+	no data

Graphics interfaces

Available interfaces and connections of Core i5-655K and Ryzen 9 7945HX integrated GPUs.

Number of displays supported

no data

Peripherals

Specifications and connection of peripherals supported by Core i5-655K and Ryzen 9 7945HX.

PCIe version	2.0	5.0
PCI Express lanes	16	28

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.

i5-655K 1.27

Ryzen 9 7945HX 34.41
+2609%

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.

i5-655K 2017

Ryzen 9 7945HX 54660
+2610%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i5-655K 537

Ryzen 9 7945HX 2736
+409%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i5-655K 1247

Ryzen 9 7945HX 15895
+1175%

Gaming performance

Pros & cons summary

Performance score	1.27	34.41
Integrated graphics card	0.77	2.85
Recency	30 May 2010	4 January 2023
Physical cores	2	16
Threads	4	32
Power consumption (TDP)	73 Watt	55 Watt

Ryzen 9 7945HX has a 2609.4% higher aggregate performance score, 270.1% faster integrated GPU, an age advantage of 12 years, 700% more physical cores and 700% more threads, and 32.7% lower power consumption.

The Ryzen 9 7945HX is our recommended choice as it beats the Core i5-655K in performance tests.

Note that Core i5-655K is a desktop processor while Ryzen 9 7945HX is a notebook one.

Should you still have questions on choice between Core i5-655K and Ryzen 9 7945HX, ask them in Comments section, and we shall answer.