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 i9-9900KF

2019

Why buy it

✅+1.1% higher PassMark.
✅+33.3% larger total L3 cache (16 MB vs 12 MB).
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $488 MSRP, while Core Ultra 7 255U mostly shows up through inconsistent older-market listings.
❌578.6% higher power demand at 95W vs 14W.
❌Older platform position on LGA1151 with DDR4, while Core Ultra 7 255U moves to FCBGA2049 and DDR5.

Core Ultra 7 255U

2025

Why buy it

✅Draws 14W instead of 95W, a 81W reduction.
✅Newer platform on FCBGA2049 with DDR5 support instead of LGA1151 and DDR4.

Trade-offs

❌Lower PassMark (17,834 vs 18,029).
❌Smaller total L3 cache (12 MB vs 16 MB).

Core i9-9900KF

2019

Core Ultra 7 255U

2025

Why buy it

✅+1.1% higher PassMark.
✅+33.3% larger total L3 cache (16 MB vs 12 MB).
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Why buy it

✅Draws 14W instead of 95W, a 81W reduction.
✅Newer platform on FCBGA2049 with DDR5 support instead of LGA1151 and DDR4.

Trade-offs

❌Launch MSRP is still $488 MSRP, while Core Ultra 7 255U mostly shows up through inconsistent older-market listings.
❌578.6% higher power demand at 95W vs 14W.
❌Older platform position on LGA1151 with DDR4, while Core Ultra 7 255U moves to FCBGA2049 and DDR5.

Trade-offs

❌Lower PassMark (17,834 vs 18,029).
❌Smaller total L3 cache (12 MB vs 16 MB).

Quick Answers

So, is Core Ultra 7 255U better than Core i9-9900KF?

It depends on what matters more to you. For gaming, Core Ultra 7 255U is ahead with a 2.4% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i9-9900KF pulls ahead with 1.1% better PassMark. Core i9-9900KF also has the bigger cache pool with 33.3% larger total L3 cache (16 MB vs 12 MB).

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

For streaming, content creation, and heavier multitasking, Core i9-9900KF is the better fit. You are getting 1.1% better PassMark, backed by 8 cores and 16 threads. It also carries the larger cache pool with 33.3% larger total L3 cache (16 MB vs 12 MB).

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

Core Ultra 7 255U is still the faster CPU overall, but Core i9-9900KF makes more sense if price matters more than absolute performance. Core Ultra 7 255U is at an unclear MSRP at unclear MSRP versus $488 MSRP, and it gives you a 2.4% average FPS lead across 50 shared CPU game tests in our data. The trade-off is that Core i9-9900KF is still stronger for heavier multi-core work with 1.1% better PassMark. Core i9-9900KF is also 100.0% better value on MSRP (36.9 vs 0.0 PassMark/$), 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 7 255U is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2025 vs 2019) and a healthier platform with FCBGA2049 and DDR5 instead of LGA1151. 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 i9-9900KF Benchmark Check

Core Ultra 7 255U Benchmark Check

Path of Exile 2

Preset	Core i9-9900KF	Core Ultra 7 255U
1080p
low	301 FPS	292 FPS
medium	264 FPS	256 FPS
high	222 FPS	216 FPS
ultra	190 FPS	187 FPS
1440p
low	247 FPS	243 FPS
medium	195 FPS	192 FPS
high	159 FPS	157 FPS
ultra	140 FPS	138 FPS
4K
low	170 FPS	168 FPS
medium	136 FPS	134 FPS
high	105 FPS	104 FPS
ultra	92 FPS	90 FPS

Open Core i9-9900KF Open Core Ultra 7 255U

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i9-9900KF	Core Ultra 7 255U
1080p
low	451 FPS	446 FPS
medium	451 FPS	399 FPS
high	451 FPS	348 FPS
ultra	405 FPS	308 FPS
1440p
low	451 FPS	445 FPS
medium	451 FPS	367 FPS
high	421 FPS	322 FPS
ultra	361 FPS	276 FPS
4K
low	404 FPS	331 FPS
medium	342 FPS	285 FPS
high	320 FPS	265 FPS
ultra	274 FPS	228 FPS

Open Core i9-9900KF Open Core Ultra 7 255U

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i9-9900KF	Core Ultra 7 255U
1080p
low	451 FPS	446 FPS
medium	451 FPS	446 FPS
high	451 FPS	446 FPS
ultra	451 FPS	446 FPS
1440p
low	451 FPS	446 FPS
medium	451 FPS	446 FPS
high	451 FPS	446 FPS
ultra	451 FPS	446 FPS
4K
low	451 FPS	446 FPS
medium	451 FPS	446 FPS
high	425 FPS	446 FPS
ultra	354 FPS	379 FPS

Open Core i9-9900KF Open Core Ultra 7 255U

League of Legends

League of Legends

Valorant

Preset	Core i9-9900KF	Core Ultra 7 255U
1080p
low	451 FPS	446 FPS
medium	451 FPS	446 FPS
high	451 FPS	446 FPS
ultra	451 FPS	446 FPS
1440p
low	451 FPS	446 FPS
medium	451 FPS	446 FPS
high	451 FPS	446 FPS
ultra	451 FPS	446 FPS
4K
low	451 FPS	446 FPS
medium	451 FPS	446 FPS
high	451 FPS	446 FPS
ultra	437 FPS	427 FPS

Open Core i9-9900KF Open Core Ultra 7 255U

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i9-9900KF and Core Ultra 7 255U

Core i9-9900KF

The Core i9-9900KF is manufactured by Intel. It was released in 8 January 2019 (6 years ago). It is based on the Coffee Lake-R (2018−2019) architecture. It features 8 cores and 16 threads. Base frequency is 3.6 GHz, with boost up to 5 GHz. L3 cache: 16 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 95 Watt. Memory support: DDR4-2666. Passmark benchmark score: 18,029 points. Launch price was $488.

Core Ultra 7 255U

The Core Ultra 7 255U is manufactured by Intel. It was released in 1 January 2025 (less than a year ago). It is based on the Arrow Lake-U (2025) architecture. It features 12 cores and 14 threads. Base frequency is 3.8 GHz, with boost up to 5.2 GHz. L3 cache: 12 MB. Built on 5 nm process technology. Socket: FCBGA2049. Thermal design power (TDP): 14 MB + 12 MB. Memory support: DDR5. Passmark benchmark score: 17,834 points. Launch price was $299.

⚡

Processing Power

The Core i9-9900KF packs 8 cores / 16 threads, while the Core Ultra 7 255U offers 12 cores / 14 threads — the Core Ultra 7 255U has 4 more cores. Boost clocks reach 5 GHz on the Core i9-9900KF versus 5.2 GHz on the Core Ultra 7 255U — a 3.9% clock advantage for the Core Ultra 7 255U (base: 3.6 GHz vs 3.8 GHz). The Core i9-9900KF uses the Coffee Lake-R (2018−2019) architecture (14 nm), while the Core Ultra 7 255U uses Arrow Lake-U (2025) (5 nm). In PassMark, the Core i9-9900KF scores 18,029 against the Core Ultra 7 255U's 17,834 — a 1.1% lead for the Core i9-9900KF. L3 cache: 16 MB (total) on the Core i9-9900KF vs 12 MB on the Core Ultra 7 255U.

Feature	Core i9-9900KF	Core Ultra 7 255U
Cores / Threads	8 / 16	12 / 14+50%
Boost Clock	5 GHz	5.2 GHz+4%
Base Clock	3.6 GHz	3.8 GHz+6%
L3 Cache	16 MB (total)+33%	12 MB
L2 Cache	256K (per core)	—
Process	14 nm	5 nm-64%
Architecture	Coffee Lake-R (2018−2019)	Arrow Lake-U (2025)
PassMark	18,029+1%	17,834
Cinebench R23 Multi	12,812	—
Geekbench 6 Single	1,720	—
Geekbench 6 Multi	8,150	—

🧠

Memory & Platform

The Core i9-9900KF uses the LGA1151 socket (PCIe 3.0), while the Core Ultra 7 255U uses FCBGA2049 (PCIe 5.0) — making them incompatible on the same motherboard.

Feature	Core i9-9900KF	Core Ultra 7 255U
Socket	LGA1151	FCBGA2049
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	DDR4-2666	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—