AMD Ryzen 9 7950X vs Intel Core Ultra 9 275HX Comparison

The AMD Ryzen 9 7950X and Intel Core Ultra 9 275HX sit in the same performance neighborhood, with the database showing average benchmark scores of 69515 for the AMD desktop flagship and 67469 for Intel's mobile flagship. Both land in the 94th percentile against all recorded CPUs, yet they arrive there through very different routes: a 16-core, 32-thread Zen 4 desktop part against a 24-core, 24-thread Arrow Lake-HX mobile part. Across the recorded head-to-head tests, the Ryzen 9 7950X takes 10 wins to 7, but the margins and the shape of those wins tell a more nuanced story than the raw tally suggests.

FAQ

Q: Which CPU wins more benchmarks overall?

A: The Ryzen 9 7950X takes 10 of the 17 recorded head-to-head tests, against 7 for the Core Ultra 9 275HX. AMD's wins also tend to be larger, including a 45.3% margin in PassMark integer math and a 37.4% margin in data compression.

Q: Which CPU is faster in single-threaded work?

A: It splits by test. The Core Ultra 9 275HX leads in Cinebench R23 single-core (2204 versus 2000, a 9.3% gap), Cinebench R15 single-core (334 versus 315.5, 5.5%), PassMark single thread (4713 versus 4266, 9.5%) and PassMark physics (3338 versus 3102, 7.1%). The Ryzen 9 7950X counters in Geekbench single-core with 2613 versus 2458, a 6.3% AMD win.

Q: Which is faster in multi-core rendering?

A: The Ryzen 9 7950X. It posts 36523 in Cinebench R23 multi-core versus 35589 for the 275HX, a 2.6% edge, and extends that to 5.8% in Cinebench R15 multi-core (5947.5 versus 5619.5) and 7.8% in Geekbench multi-core (22415 versus 20795).

Q: How do their power envelopes compare?

A: The recorded TDP figures differ sharply: 170 W for the 7950X versus 55 W for the 275HX. That gap reflects their different markets, desktop versus mobile, rather than direct efficiency measurements.

Q: Do they support the same memory?

A: Both support DDR5 on a dual-channel bus, but bandwidth differs: 102.4 GB/s for the Core Ultra 9 275HX versus 83.2 GB/s for the Ryzen 9 7950X. Only the 7950X lists ECC memory support.

Q: Where does each CPU rank overall?

A: Both sit in the 94th percentile versus all CPUs in the database. The 7950X's nearest rivals include the Intel Core i7-14700K (avgScore 69355, within 0.2%) and the AMD EPYC 9115 (within 0.3%), while the 275HX clusters near the Intel Xeon w5-3525 (within 0.3%) and AMD EPYC 4484PX (within 0.5%).

Architecture Differences

These two chips could hardly be more architecturally distinct. The Ryzen 9 7950X is AMD's Zen 4 "Raphael" design, built on TSMC's 5 nm process, with 16 cores and 32 threads arranged symmetrically with SMT. It packs 13,140 million transistors across a two-die layout of 2x 71 mm². Its cache hierarchy allocates 64 KB of L1 and 1 MB of L2 per core, with a large 64 MB shared L3 slice feeding all cores.

The Core Ultra 9 275HX is Intel's Arrow Lake-HX part, also fabricated by TSMC but on the denser 3 nm node. It carries 17,800 million transistors on a monolithic 243 mm² die. Intel's approach here forgoes SMT: 24 cores and 24 threads means every core runs one thread. Per-core cache is heavier, with 192 KB of L1 and 3 MB of L2 per core, though the shared L3 is smaller at 36 MB.

The threading philosophy is the crux. AMD relies on 16 physical cores boosted to 5.70 GHz, each capable of two threads, for 32 total threads. Intel uses more physical cores, 24, but caps at one thread per core and a 5.40 GHz boost. That shows up in the benchmark spread: the 7950X tends to win throughput-heavy tests, while the 275HX's higher per-core cache and single-thread design win latency-sensitive ones. Platform traits diverge too. The 7950X is a desktop socket AM5 chip with 24 Gen 5 PCIe lanes from the CPU and basic Radeon integrated graphics. The 275HX is a mobile BGA 2114 soldered part with 20 Gen 5 lanes and a much stronger integrated GPU, Arc Xe-LPG Graphics with 64 EUs, sensible for laptops paired with discrete GPUs. Both chips ship multiplier-unlocked.

Where Each One Wins

The Ryzen 9 7950X owns anything that scales with threads and memory throughput. Its 32 threads translate into wins across every multi-core test recorded: Cinebench R15 and R23 multi-core, Geekbench multi-core, PassMark multithread (62478 versus 55759), and a sweep of PassMark compute subtests. Integer-heavy and vectorizable workloads are its strongest suit: integer math by 45.3%, extended instructions by 32.1%, random string sorting by 32.5%, and data compression by 37.4%. For compilation, code execution, and general productivity workloads, the data clearly favors AMD.

The Core Ultra 9 275HX wins where raw per-thread speed, cache depth, and branchy computation dominate. It takes PassMark floating point math by 27.8% (191186 versus 138004), find prime numbers by 24.8% (448 versus 337), and single-thread tests across the board except Geekbench. Its higher memory bandwidth, 102.4 GB/s versus 83.2 GB/s, plausibly assists in bandwidth-sensitive tasks. And it does all this as a mobile-class part, making it the clear choice where a desktop socket is not an option: the 275HX exists in laptops, while the 7950X requires an AM5 desktop build.

Specification Differences

• Cores/Threads: 16 cores, 32 threads (7950X) versus 24 cores, 24 threads (275HX)
• Base/Boost Clock: 4.50 / 5.70 GHz (7950X) versus 2.70 / 5.40 GHz (275HX)
• TDP: 170 W versus 55 W
• Process Node: 5 nm versus 3 nm (both TSMC)
• Transistors/Die: 13,140 million across 2x 71 mm² versus 17,800 million on 243 mm²
• Cache: 64 KB L1 and 1 MB L2 per core with 64 MB shared L3 (7950X) versus 192 KB L1 and 3 MB L2 per core with 36 MB shared L3 (275HX)
• Memory Bandwidth: 83.2 GB/s versus 102.4 GB/s; both DDR5 dual-channel, but only the 7950X supports ECC
• PCIe: 24 Gen 5 CPU lanes versus 20
• Integrated Graphics: basic Radeon Graphics versus Arc Xe-LPG Graphics 64EU
• Socket/Segment: AMD Socket AM5 desktop (launch MSRP $699) versus Intel BGA 2114 mobile
• Release: September 2022 versus January 2025

Head-to-Head Benchmarks

Start with the rendering suite. Cinebench R23 multi-core goes to AMD at 36523 versus 35589, only 2.6%, but the single-core flip is dramatic: Intel scores 2204 against AMD's 2000, a 9.3% win for the 275HX. Cinebench R15 mirrors the pattern, 5947.5 versus 5619.5 multi-core for AMD (5.8%) and 334 versus 315.5 single-core for Intel (5.5%). Geekbench is the outlier, AMD winning both legs: 22415 versus 20795 multi-core (7.8%) and 2613 versus 2458 single-core (6.3%).

PassMark is where the gaps explode in AMD's favor. Integer math is the biggest blowout on the sheet: 225603 versus 155218, a 45.3% AMD advantage. Data compression follows at 37.4% (835923 versus 608381), random string sorting at 32.5% (98501 versus 74320), and extended instructions at 32.1% (62131 versus 47016). The overall PassMark multithread score lands 12.1% in AMD's favor, 62478 to 55759, and data encryption goes to AMD by 4.7%.

Intel's response comes in the per-thread and compute tests. Floating point math is Intel's crown: 191186 versus 138004, a 27.8% win. Find prime numbers goes Intel's way at 448 versus 337, 24.8%. PassMark single thread is 4713 versus 4266, 9.5% for Intel, and physics favors the 275HX at 3338 versus 3102, 7.1%.

The verdict from the recorded data: the 7950X is the stronger all-around performer, winning 10 of 17 tests with several double-digit margins, and it holds the higher average score, 69515 versus 67469. But the 275HX is remarkable for a mobile-class chip, trading blows with a 170 W desktop flagship and beating it decisively in single-threaded and floating point work, all within a 55 W envelope. Choosing between them is less about performance and more about platform: AM5 desktop or BGA mobile.