TurboVS
AMD Ryzen 9 9950X3D
Intel Core Ultra 9 275HX

AMD Ryzen 9 9950X3D Intel Core Ultra 9 275HX

Overview

Welcome to our in-depth specification face-off between the AMD Ryzen 9 9950X3D and the Intel Core Ultra 9 275HX. These two high-performance processors come from very different worlds — one built for the desktop, the other engineered for powerful laptops — yet both target enthusiast-level workloads. In this comparison, we examine key battlegrounds including multi-core and single-core performance, cache architecture, memory support, and thermal design to help you find the right chip for your needs.

Common Features

  • ✓ Both the AMD Ryzen 9 9950X3D and Intel Core Ultra 9 275HX feature integrated graphics.
  • ✓ Both processors support PCI Express (PCIe) version 5.
  • ✓ Both the AMD Ryzen 9 9950X3D and Intel Core Ultra 9 275HX support 64-bit computing.
  • ✓ Both processors have an unlocked multiplier.
  • ✓ Both use DDR5 memory.
  • ✓ Both support a maximum of 192GB of RAM.
  • ✓ Both processors feature dual memory channels.
  • ✓ Both share the same instruction sets: MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2.
  • ✓ The NX bit security feature is present on both processors.

Main Differences

  • • The AMD Ryzen 9 9950X3D is a desktop processor while the Intel Core Ultra 9 275HX is a laptop processor.
  • • The CPU socket is AM5 on the AMD Ryzen 9 9950X3D and BGA 2114 on the Intel Core Ultra 9 275HX.
  • • Thermal Design Power (TDP) is 170W on the AMD Ryzen 9 9950X3D and 55W on the Intel Core Ultra 9 275HX.
  • • The semiconductor size is 4nm on the AMD Ryzen 9 9950X3D and 3nm on the Intel Core Ultra 9 275HX.
  • • The maximum CPU temperature is 95°C on the AMD Ryzen 9 9950X3D and 105°C on the Intel Core Ultra 9 275HX.
  • • CPU speed is 16 cores at 4.3 GHz on the AMD Ryzen 9 9950X3D and 8 cores at 2.7 GHz plus 16 cores at 2.1 GHz on the Intel Core Ultra 9 275HX.
  • • The AMD Ryzen 9 9950X3D has 32 threads while the Intel Core Ultra 9 275HX has 24 threads.
  • • Turbo clock speed is 5.7 GHz on the AMD Ryzen 9 9950X3D and 5.4 GHz on the Intel Core Ultra 9 275HX.
  • • L2 cache is 16MB on the AMD Ryzen 9 9950X3D and 40MB on the Intel Core Ultra 9 275HX.
  • • L3 cache is 128MB on the AMD Ryzen 9 9950X3D and 36MB on the Intel Core Ultra 9 275HX.
  • • The clock multiplier is 43 on the AMD Ryzen 9 9950X3D and 27 on the Intel Core Ultra 9 275HX.
  • • big.LITTLE technology is used on the Intel Core Ultra 9 275HX but not on the AMD Ryzen 9 9950X3D.
  • • The PassMark multi-core result is 70250 on the AMD Ryzen 9 9950X3D and 56426 on the Intel Core Ultra 9 275HX.
  • • The PassMark single-core result is 4737 on the AMD Ryzen 9 9950X3D and 4723 on the Intel Core Ultra 9 275HX.
  • • The integrated GPU turbo frequency is 2200 MHz on the AMD Ryzen 9 9950X3D and 1900 MHz on the Intel Core Ultra 9 275HX.
  • • Maximum RAM speed is 5600 MHz on the AMD Ryzen 9 9950X3D and 6400 MHz on the Intel Core Ultra 9 275HX.
  • • ECC memory support is available on the AMD Ryzen 9 9950X3D but not on the Intel Core Ultra 9 275HX.
Specs Comparison
AMD Ryzen 9 9950X3D

AMD Ryzen 9 9950X3D

Intel Core Ultra 9 275HX

Intel Core Ultra 9 275HX

General info:
Type Desktop Laptop
CPU socket AM5 BGA 2114
Has integrated graphics ✓ ✓
release date January 2025 January 2025
Thermal Design Power (TDP) 170W 55W
semiconductor size 4 nm 3 nm
CPU temperature 95 °C 105 °C
PCI Express (PCIe) version 5 5
Supports 64-bit ✓ ✓

The most fundamental difference here is platform: the Ryzen 9 9950X3D is a desktop processor using the socketed AM5 interface, while the Core Ultra 9 275HX is a laptop chip soldered directly onto the motherboard via BGA 2114. This means the 9950X3D can theoretically be upgraded or replaced in a compatible motherboard, whereas the 275HX is permanently fixed to its host system — a critical distinction for builders and system integrators.

Thermal Design Power tells the most telling story in this group: the 9950X3D carries a 170W TDP versus the 275HX's 55W TDP. That three-fold difference reflects their intended environments — a desktop with ample cooling headroom versus a laptop chassis where heat and battery life are tightly constrained. Interestingly, the 275HX tolerates a higher peak CPU temperature (105 °C vs 95 °C), which is typical for mobile silicon designed to safely operate in thermally dense enclosures. On process node, the 275HX edges ahead at 3 nm versus the 9950X3D's 4 nm, suggesting greater transistor density and potential efficiency gains at the silicon level.

Both chips share PCIe 5 support, integrated graphics, and full 64-bit compatibility, so neither has an advantage on those fronts. Overall, these two processors are not truly competing products — one is built for maximum desktop performance with no power constraints, the other for capable mobile computing within a tight thermal envelope. The 9950X3D has a clear edge in raw thermal headroom and upgradeability; the 275HX wins on efficiency and process node advancement.

Performance:
CPU speed 16 x 4.3 GHz 8 x 2.7 & 16 x 2.1 GHz
CPU threads 32 threads 24 threads
turbo clock speed 5.7GHz 5.4GHz
Has an unlocked multiplier ✓ ✓
L2 cache 16 MB 40 MB
L3 cache 128 MB 36 MB
Uses big.LITTLE technology ✕ ✓
clock multiplier 43 27

The AMD Ryzen 9 9950X3D and Intel Core Ultra 9 275HX have significant differences in their core architecture and performance features. The Ryzen 9 9950X3D has 16 cores running at a base speed of 4.3 GHz, with the ability to turbo boost up to 5.7 GHz. In contrast, the Intel Core Ultra 9 275HX features a combination of 8 high-performance cores running at 2.7 GHz and 16 efficiency cores at 2.1 GHz, with a turbo clock speed of 5.4 GHz.

In terms of CPU threads, the Ryzen 9 9950X3D supports 32 threads, while the Intel Core Ultra 9 275HX supports 24 threads. The Ryzen 9 9950X3D also has a larger L3 cache at 128 MB, compared to the 36 MB on the Core Ultra 9 275HX, but the Core Ultra 9 275HX compensates with a larger L2 cache of 40 MB, which is double the size of the Ryzen's 16 MB.

Both processors have unlocked multipliers, allowing for overclocking, though their clock multipliers differ: the Ryzen 9 9950X3D has a multiplier of 43, while the Intel Core Ultra 9 275HX has a lower multiplier of 27. Additionally, the Ryzen 9 9950X3D does not use big.LITTLE technology, while the Intel Core Ultra 9 275HX incorporates this approach, which balances performance and efficiency cores for improved power management.

Benchmarks:
PassMark result 70250 56426
PassMark result (single) 4737 4723

The AMD Ryzen 9 9950X3D and Intel Core Ultra 9 275HX differ in their PassMark benchmark scores. The Ryzen 9 9950X3D achieves a total PassMark result of 70250, which is higher than the Intel Core Ultra 9 275HX's score of 56426. In terms of single-core performance, the Ryzen 9 9950X3D scores 4737, while the Intel Core Ultra 9 275HX has a very similar single-core score of 4723.

This shows that the Ryzen 9 9950X3D delivers significantly better multi-core performance, but both processors offer nearly identical single-core performance based on these benchmark results.

Integrated graphics:
GPU turbo 2200 MHz 1900 MHz

The AMD Ryzen 9 9950X3D and Intel Core Ultra 9 275HX both feature integrated graphics, but they differ in their GPU turbo speeds. The Ryzen 9 9950X3D has a GPU turbo speed of 2200 MHz, while the Intel Core Ultra 9 275HX's GPU turbo speed is slightly lower at 1900 MHz.

This indicates that the Ryzen 9 9950X3D may offer a slightly higher GPU performance in terms of turbo speed compared to the Intel Core Ultra 9 275HX, based on the provided specifications.

Memory:
RAM speed (max) 5600 MHz 6400 MHz
DDR memory version 5 5
memory channels 2 2
maximum memory amount 192GB 192GB
Supports ECC memory ✓ ✕

The AMD Ryzen 9 9950X3D and Intel Core Ultra 9 275HX both support DDR5 memory and feature two memory channels, but they differ in a few key areas. The Ryzen 9 9950X3D supports a maximum RAM speed of 5600 MHz, while the Intel Core Ultra 9 275HX supports a slightly higher maximum RAM speed of 6400 MHz.

Both processors can handle up to 192 GB of maximum memory, but the Ryzen 9 9950X3D supports ECC memory, which provides error correction for enhanced reliability. The Intel Core Ultra 9 275HX, however, does not support ECC memory.

Features:
instruction sets MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2 MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
Has NX bit ✓ ✓

The AMD Ryzen 9 9950X3D and Intel Core Ultra 9 275HX both support the same set of instruction sets, including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2. These instruction sets enable efficient processing for a wide range of tasks, from multimedia to cryptography.

Additionally, both processors feature the NX bit, which provides protection against certain types of attacks by marking memory pages as non-executable.

Comparison Summary & Verdict

After a thorough look at the specs, these two processors serve clearly distinct audiences. The AMD Ryzen 9 9950X3D dominates in raw throughput, boasting a higher PassMark multi-core score of 70,250, a massive 128MB L3 cache, 32 threads, a 5.7GHz turbo clock, and ECC memory support — making it the stronger choice for demanding desktop workloads such as content creation, simulation, and professional computing. The Intel Core Ultra 9 275HX, on the other hand, is engineered for mobility, drawing just 55W TDP while offering a faster 6400MHz RAM speed, a larger 40MB L2 cache, and a cutting-edge 3nm process node. Its big.LITTLE architecture further optimizes power efficiency on the go. Both chips share unlocked multipliers, PCIe 5 support, and DDR5 compatibility, meaning neither compromises on platform modernity.

AMD Ryzen 9 9950X3D
Buy AMD Ryzen 9 9950X3D if...

Buy the AMD Ryzen 9 9950X3D if you need a high-powered desktop processor with a massive L3 cache, superior multi-core performance, ECC memory support, and the highest possible turbo clock speeds for professional or enthusiast workloads.

Intel Core Ultra 9 275HX
Buy Intel Core Ultra 9 275HX if...

Buy the Intel Core Ultra 9 275HX if you need a capable high-performance processor in a laptop form factor, where a low 55W TDP, faster maximum RAM speeds, and a modern 3nm process node are priorities.