PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, productivity performance, platform differences, power efficiency, pricing context, and upgrade path so you can see which CPU actually makes more sense.

Core Ultra 9 275HX

2025

Why buy it

✅Better for gaming: +20.9% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 55W instead of 250W, a 195W reduction.
✅Newer platform on FCBGA2114 with DDR5 support instead of LGA4189 and DDR4.
✅Integrated graphics onboard with Intel Arc Graphics, while Xeon Platinum 8358 needs a discrete GPU.

Trade-offs

❌Smaller total L3 cache (36 MB vs 48 MB).
❌Less compelling for workstation-style loads than Xeon Platinum 8358, which brings 32 cores / 64 threads and 64 PCIe lanes.
❌No AVX-512 support for niche heavy compute workloads where it can matter.

Xeon Platinum 8358

2021

Why buy it

✅+33.3% larger total L3 cache (48 MB vs 36 MB).
✅Better for workstations and heavier parallel workloads: 32 cores / 64 threads, plus 64 PCIe lanes vs 24.
✅166.7% more PCIe lanes (64 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Core Ultra 9 275HX across 50 shared CPU benchmark tests.
❌Lower PassMark (54,416 vs 56,018).
❌Launch MSRP is still $4,607 MSRP, while Core Ultra 9 275HX mostly shows up through inconsistent older-market listings.
❌354.5% higher power demand at 250W vs 55W.
❌Older platform position on LGA4189 with DDR4, while Core Ultra 9 275HX moves to FCBGA2114 and DDR5.

Core Ultra 9 275HX

2025

Xeon Platinum 8358

2021

Why buy it

✅Better for gaming: +20.9% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 55W instead of 250W, a 195W reduction.
✅Newer platform on FCBGA2114 with DDR5 support instead of LGA4189 and DDR4.
✅Integrated graphics onboard with Intel Arc Graphics, while Xeon Platinum 8358 needs a discrete GPU.

Why buy it

✅+33.3% larger total L3 cache (48 MB vs 36 MB).
✅Better for workstations and heavier parallel workloads: 32 cores / 64 threads, plus 64 PCIe lanes vs 24.
✅166.7% more PCIe lanes (64 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Smaller total L3 cache (36 MB vs 48 MB).
❌Less compelling for workstation-style loads than Xeon Platinum 8358, which brings 32 cores / 64 threads and 64 PCIe lanes.
❌No AVX-512 support for niche heavy compute workloads where it can matter.

Trade-offs

❌Worse for gaming: lower average FPS than Core Ultra 9 275HX across 50 shared CPU benchmark tests.
❌Lower PassMark (54,416 vs 56,018).
❌Launch MSRP is still $4,607 MSRP, while Core Ultra 9 275HX mostly shows up through inconsistent older-market listings.
❌354.5% higher power demand at 250W vs 55W.
❌Older platform position on LGA4189 with DDR4, while Core Ultra 9 275HX moves to FCBGA2114 and DDR5.

Quick Answers

So, is Core Ultra 9 275HX better than Xeon Platinum 8358?

Not in a simple one-size-fits-all way. Xeon Platinum 8358 makes more sense for workstation-style multi-core throughput, while Core Ultra 9 275HX is the better mainstream desktop choice for gaming, platform cost, and day-to-day practicality.

Which one is better for gaming?

If gaming is the priority, Core Ultra 9 275HX is the better pick here. According to our tests, it delivers 20.9% more average FPS across 50 shared CPU game tests.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Core Ultra 9 275HX is the better fit. You are getting 2.9% better PassMark, backed by 24 cores and 24 threads.

Which one is the smarter buy today, not just the cheaper CPU?

Core Ultra 9 275HX is still the faster CPU overall, but Xeon Platinum 8358 makes more sense if price matters more than absolute performance. Core Ultra 9 275HX is at an unclear MSRP at unclear MSRP versus $4,607 MSRP, and it gives you a 20.9% average FPS lead across 50 shared CPU game tests in our data. Xeon Platinum 8358 is also 100.0% better value on MSRP (11.8 vs 0.0 PassMark/$), which is why it is easier to justify for price-conscious builds on paper.

Which one is more future-proof for 2026 and beyond?

Core Ultra 9 275HX is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2025 vs 2021), a healthier platform with FCBGA2114 and DDR5 instead of LGA4189, and more multi-core headroom with 24 cores / 24 threads instead of 32/64. That should give you a better long-term upgrade path for motherboard, RAM, and future CPU swaps.

Games Benchmarks

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

Core Ultra 9 275HX Benchmark Check

Xeon Platinum 8358 Benchmark Check

Path of Exile 2

Preset	Core Ultra 9 275HX	Xeon Platinum 8358
1080p
low	309 FPS	185 FPS
medium	299 FPS	149 FPS
high	246 FPS	120 FPS
ultra	208 FPS	94 FPS
1440p
low	269 FPS	154 FPS
medium	228 FPS	120 FPS
high	175 FPS	93 FPS
ultra	154 FPS	74 FPS
4K
low	179 FPS	72 FPS
medium	151 FPS	60 FPS
high	112 FPS	46 FPS
ultra	101 FPS	38 FPS

Open Core Ultra 9 275HX Open Xeon Platinum 8358

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core Ultra 9 275HX	Xeon Platinum 8358
1080p
low	802 FPS	416 FPS
medium	700 FPS	364 FPS
high	565 FPS	296 FPS
ultra	495 FPS	237 FPS
1440p
low	682 FPS	356 FPS
medium	614 FPS	317 FPS
high	505 FPS	264 FPS
ultra	408 FPS	203 FPS
4K
low	382 FPS	221 FPS
medium	349 FPS	200 FPS
high	326 FPS	169 FPS
ultra	283 FPS	136 FPS

Open Core Ultra 9 275HX Open Xeon Platinum 8358

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core Ultra 9 275HX	Xeon Platinum 8358
1080p
low	866 FPS	984 FPS
medium	708 FPS	858 FPS
high	628 FPS	811 FPS
ultra	537 FPS	720 FPS
1440p
low	744 FPS	787 FPS
medium	611 FPS	676 FPS
high	529 FPS	639 FPS
ultra	453 FPS	567 FPS
4K
low	527 FPS	504 FPS
medium	446 FPS	397 FPS
high	403 FPS	353 FPS
ultra	344 FPS	288 FPS

Open Core Ultra 9 275HX Open Xeon Platinum 8358

League of Legends

League of Legends

Valorant

Preset	Core Ultra 9 275HX	Xeon Platinum 8358
1080p
low	1078 FPS	911 FPS
medium	959 FPS	828 FPS
high	841 FPS	714 FPS
ultra	757 FPS	615 FPS
1440p
low	862 FPS	712 FPS
medium	756 FPS	625 FPS
high	660 FPS	537 FPS
ultra	585 FPS	460 FPS
4K
low	635 FPS	514 FPS
medium	565 FPS	459 FPS
high	500 FPS	403 FPS
ultra	437 FPS	351 FPS

Open Core Ultra 9 275HX Open Xeon Platinum 8358

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core Ultra 9 275HX and Xeon Platinum 8358

Core Ultra 9 275HX

The Core Ultra 9 275HX is manufactured by Intel. It was released in 2025-01-01. It is based on the Arrow Lake-HX (2025) architecture. It features 24 cores and 24 threads. Base frequency is 2.7 GHz, with boost up to 5.4 GHz. L3 cache: 36 MB (total). L2 cache: 3 MB (per core). Built on 3 nm process technology. Socket: FCBGA2114. Thermal design power (TDP): 55 Watt. Memory support: DDR5-6400. Passmark benchmark score: 56,018 points. Launch price was $600.

Xeon Platinum 8358

The Xeon Platinum 8358 is manufactured by Intel. It was released in 2021-04-06. It is based on the Ice Lake-SP (2021) architecture. It features 32 cores and 64 threads. Base frequency is 2.6 GHz, with boost up to 3.4 GHz. L3 cache: 48 MB (total). L2 cache: 1 MB (per core). Built on 10 nm process technology. Socket: LGA4189. Thermal design power (TDP): 250 Watt. Memory support: DDR4-3200. Passmark benchmark score: 54,416 points. Launch price was $3,950.

⚡

Processing Power

The Core Ultra 9 275HX packs 24 cores / 24 threads, while the Xeon Platinum 8358 offers 32 cores / 64 threads — the Xeon Platinum 8358 has 8 more cores. Boost clocks reach 5.4 GHz on the Core Ultra 9 275HX versus 3.4 GHz on the Xeon Platinum 8358 — a 45.5% clock advantage for the Core Ultra 9 275HX (base: 2.7 GHz vs 2.6 GHz). The Core Ultra 9 275HX uses the Arrow Lake-HX (2025) architecture (3 nm), while the Xeon Platinum 8358 uses Ice Lake-SP (2021) (10 nm). In PassMark, the Core Ultra 9 275HX scores 56,018 against the Xeon Platinum 8358's 54,416 — a 2.9% lead for the Core Ultra 9 275HX. L3 cache: 36 MB (total) on the Core Ultra 9 275HX vs 48 MB (total) on the Xeon Platinum 8358.

Feature	Core Ultra 9 275HX	Xeon Platinum 8358
Cores / Threads	24 / 24	32 / 64+33%
Boost Clock	5.4 GHz+59%	3.4 GHz
Base Clock	2.7 GHz+4%	2.6 GHz
L3 Cache	36 MB (total)	48 MB (total)+33%
L2 Cache	3 MB (per core)+200%	1 MB (per core)
Process	3 nm-70%	10 nm
Architecture	Arrow Lake-HX (2025)	Ice Lake-SP (2021)
PassMark	56,018+3%	54,416
Geekbench 6 Single	2,835	—
Geekbench 6 Multi	17,908	—

🧠

Memory & Platform

The Core Ultra 9 275HX uses the FCBGA2114 socket (PCIe 5.0), while the Xeon Platinum 8358 uses LGA4189 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-6400 on the Core Ultra 9 275HX versus 3200 on the Xeon Platinum 8358 — the Xeon Platinum 8358 supports 199.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon Platinum 8358 supports up to 4096 of RAM compared to 256 GB — 176.5% more capacity for professional workloads. Memory channels: 2 (Core Ultra 9 275HX) vs 8 (Xeon Platinum 8358). PCIe lanes: 24 (Core Ultra 9 275HX) vs 64 (Xeon Platinum 8358) — the Xeon Platinum 8358 offers 40 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM870,WM880 (Core Ultra 9 275HX) and C621A (Xeon Platinum 8358).

Feature	Core Ultra 9 275HX	Xeon Platinum 8358
Socket	FCBGA2114	LGA4189
PCIe Generation	PCIe 5.0+25%	PCIe 4.0
Max RAM Speed	DDR5-6400	3200+63900%
Max RAM Capacity	256 GB+6553500%	4096
RAM Channels	2	8+300%
ECC Support	No	Yes
PCIe Lanes	24	64+167%

🔧

Advanced Features

Only the Core Ultra 9 275HX has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Xeon Platinum 8358 supports AVX-512 instructions — important for machine learning and scientific applications. Both support VT-x, VT-d virtualization. The Core Ultra 9 275HX includes integrated graphics (Intel Arc Graphics), while the Xeon Platinum 8358 requires a dedicated GPU. Primary use case: Core Ultra 9 275HX targets High-End Gaming Laptop. Direct competitor: Core Ultra 9 275HX rivals Ryzen 9 9955HX; Xeon Platinum 8358 rivals EPYC 7543.