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 i5-12400F

2022

Why buy it

✅Better for gaming: +9.7% higher average FPS across 46 shared CPU benchmark tests.
✅+50% larger total L3 cache (18 MB vs 12 MB).
✅Draws 65W instead of 105W, a 40W reduction.
✅Newer platform on LGA1700 with DDR5 support instead of LGA4189 and DDR4.
✅100+% more PCIe lanes (20 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Less compelling for workstation-style loads than Xeon Silver 4309Y, which brings 8 cores / 16 threads.
❌Launch MSRP is still $174 MSRP, while Xeon Silver 4309Y mostly shows up through inconsistent older-market listings.

Xeon Silver 4309Y

2021

Why buy it

✅Better for workstations and heavier parallel workloads: 8 cores / 16 threads.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 46 shared CPU benchmark tests.
❌Lower PassMark (18,718 vs 19,532).
❌Smaller total L3 cache (12 MB vs 18 MB).
❌61.5% higher power demand at 105W vs 65W.
❌Older platform position on LGA4189 with DDR4, while Core i5-12400F moves to LGA1700 and DDR5.

Core i5-12400F

2022

Xeon Silver 4309Y

2021

Why buy it

✅Better for gaming: +9.7% higher average FPS across 46 shared CPU benchmark tests.
✅+50% larger total L3 cache (18 MB vs 12 MB).
✅Draws 65W instead of 105W, a 40W reduction.
✅Newer platform on LGA1700 with DDR5 support instead of LGA4189 and DDR4.
✅100+% more PCIe lanes (20 vs 0) for storage and expansion-heavy builds.

Why buy it

✅Better for workstations and heavier parallel workloads: 8 cores / 16 threads.

Trade-offs

❌Less compelling for workstation-style loads than Xeon Silver 4309Y, which brings 8 cores / 16 threads.
❌Launch MSRP is still $174 MSRP, while Xeon Silver 4309Y mostly shows up through inconsistent older-market listings.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 46 shared CPU benchmark tests.
❌Lower PassMark (18,718 vs 19,532).
❌Smaller total L3 cache (12 MB vs 18 MB).
❌61.5% higher power demand at 105W vs 65W.
❌Older platform position on LGA4189 with DDR4, while Core i5-12400F moves to LGA1700 and DDR5.

Quick Answers

So, is Core i5-12400F better than Xeon Silver 4309Y?

Not in a simple one-size-fits-all way. Xeon Silver 4309Y makes more sense for workstation-style multi-core throughput, while Core i5-12400F 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 i5-12400F is the better pick here. According to our tests, it delivers 9.7% more average FPS across 46 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Core i5-12400F is the better fit. You are getting 4.3% better PassMark, backed by 6 cores and 12 threads. It also carries the larger cache pool with 50% larger total L3 cache (18 MB vs 12 MB).

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

Core i5-12400F is the smarter buy today. Core i5-12400F is at an unclear MSRP at $174 MSRP versus unclear MSRP, and it gives you a 9.7% average FPS lead across 46 shared CPU game tests in our data. It is also 100.0% better value on MSRP (112.3 vs 0.0 PassMark/$), so the better CPU is not just faster, it is also the cleaner value play on paper.

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

Core i5-12400F is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2021), a healthier platform with LGA1700 and DDR5 instead of LGA4189, 50% larger total L3 cache (18 MB vs 12 MB), and more multi-core headroom with 6 cores / 12 threads instead of 8/16. 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 i5-12400F Benchmark Check

Xeon Silver 4309Y Benchmark Check

Path of Exile 2

Preset	Core i5-12400F	Xeon Silver 4309Y
1080p
low	183 FPS	174 FPS
medium	168 FPS	138 FPS
high	139 FPS	114 FPS
ultra	119 FPS	90 FPS
1440p
low	153 FPS	144 FPS
medium	132 FPS	113 FPS
high	106 FPS	91 FPS
ultra	89 FPS	72 FPS
4K
low	87 FPS	67 FPS
medium	81 FPS	56 FPS
high	64 FPS	44 FPS
ultra	49 FPS	35 FPS

Open Core i5-12400F Open Xeon Silver 4309Y

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-12400F	Xeon Silver 4309Y
1080p
low	471 FPS	245 FPS
medium	397 FPS	212 FPS
high	341 FPS	191 FPS
ultra	301 FPS	151 FPS
1440p
low	407 FPS	217 FPS
medium	351 FPS	193 FPS
high	309 FPS	176 FPS
ultra	265 FPS	140 FPS
4K
low	282 FPS	176 FPS
medium	248 FPS	161 FPS
high	229 FPS	138 FPS
ultra	196 FPS	107 FPS

Open Core i5-12400F Open Xeon Silver 4309Y

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-12400F	Xeon Silver 4309Y
1080p
low	488 FPS	468 FPS
medium	488 FPS	468 FPS
high	488 FPS	468 FPS
ultra	488 FPS	468 FPS
1440p
low	488 FPS	468 FPS
medium	488 FPS	468 FPS
high	485 FPS	468 FPS
ultra	434 FPS	468 FPS
4K
low	442 FPS	468 FPS
medium	389 FPS	378 FPS
high	337 FPS	334 FPS
ultra	274 FPS	272 FPS

Open Core i5-12400F Open Xeon Silver 4309Y

League of Legends

League of Legends

Valorant

Preset	Core i5-12400F	Xeon Silver 4309Y
1080p
low	488 FPS	468 FPS
medium	488 FPS	468 FPS
high	488 FPS	468 FPS
ultra	488 FPS	468 FPS
1440p
low	488 FPS	468 FPS
medium	488 FPS	468 FPS
high	488 FPS	468 FPS
ultra	473 FPS	468 FPS
4K
low	488 FPS	468 FPS
medium	450 FPS	464 FPS
high	391 FPS	414 FPS
ultra	330 FPS	353 FPS

Open Core i5-12400F Open Xeon Silver 4309Y

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-12400F and Xeon Silver 4309Y

Core i5-12400F

The Core i5-12400F is manufactured by Intel. It was released in 4 January 2022 (3 years ago). It is based on the Alder Lake-S (2022) architecture. It features 6 cores and 12 threads. Base frequency is 2.5 GHz, with boost up to 4.4 GHz. L3 cache: 18 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: LGA1700. Thermal design power (TDP): 65 Watt. Memory support: DDR5-4800, DDR4-3200. Passmark benchmark score: 19,532 points. Launch price was $180.

Xeon Silver 4309Y

The Xeon Silver 4309Y is manufactured by Intel. It was released in 2015-01-01. It is based on the Ice Lake-SP (2021) architecture. It features 8 cores and 16 threads. Base frequency is 2.8 GHz, with boost up to 3.6 GHz. L3 cache: 12 MB (total). L2 cache: 1 MB (per core). Built on 10 nm process technology. Socket: LGA4189. Thermal design power (TDP): 105 Watt. Memory support: DDR4-2667. Passmark benchmark score: 18,718 points. Launch price was $800.

⚡

Processing Power

The Core i5-12400F packs 6 cores / 12 threads, while the Xeon Silver 4309Y offers 8 cores / 16 threads — the Xeon Silver 4309Y has 2 more cores. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 3.6 GHz on the Xeon Silver 4309Y — a 20% clock advantage for the Core i5-12400F (base: 2.5 GHz vs 2.8 GHz). The Core i5-12400F uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Xeon Silver 4309Y uses Ice Lake-SP (2021) (10 nm). In PassMark, the Core i5-12400F scores 19,532 against the Xeon Silver 4309Y's 18,718 — a 4.3% lead for the Core i5-12400F. L3 cache: 18 MB (total) on the Core i5-12400F vs 12 MB (total) on the Xeon Silver 4309Y.

Feature	Core i5-12400F	Xeon Silver 4309Y
Cores / Threads	6 / 12	8 / 16+33%
Boost Clock	4.4 GHz+22%	3.6 GHz
Base Clock	2.5 GHz	2.8 GHz+12%
L3 Cache	18 MB (total)+50%	12 MB (total)
L2 Cache	1.25 MB (per core)+25%	1 MB (per core)
Process	Intel 7 nm-30%	10 nm
Architecture	Alder Lake-S (2022)	Ice Lake-SP (2021)
PassMark	19,532+4%	18,718
Cinebench R23 Multi	12,380	—
Geekbench 6 Single	1,700	—
Geekbench 6 Multi	657	—

🧠

Memory & Platform

The Core i5-12400F uses the LGA1700 socket (PCIe 3.0), while the Xeon Silver 4309Y uses LGA4189 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Core i5-12400F	Xeon Silver 4309Y
Socket	LGA1700	LGA4189
PCIe Generation	PCIe 3.0	PCIe 4.0+33%
Max RAM Speed	DDR5-4800, DDR4-3200	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	20	—

🔧

Advanced Features

Virtualization: VT-x, VT-d, EPT (Core i5-12400F) / not specified (Xeon Silver 4309Y). Primary use case: Core i5-12400F targets Gaming Performance/Value. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.