Xeon Silver 4309Y vs Xeon Silver 4509Y

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.

Xeon Silver 4309Y vs Xeon Silver 4509Y FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Xeon Silver 4309Y vs Xeon Silver 4509Y: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Xeon Silver 4309Y

2021

Why buy it

✅Draws 105W instead of 125W, a 20W reduction.

Trade-offs

❌Lower PassMark (18,718 vs 18,749).
❌Smaller total L3 cache (12 MB vs 23 MB).
❌Older platform position on LGA4189 with DDR4, while Xeon Silver 4509Y moves to LGA4677 and DDR5.

Xeon Silver 4509Y

2023

Why buy it

✅+87.5% larger total L3 cache (23 MB vs 12 MB).
✅Newer platform on LGA4677 with DDR5 support instead of LGA4189 and DDR4.

Trade-offs

❌19% higher power demand at 125W vs 105W.

Quick Answers

So, is Xeon Silver 4509Y better than Xeon Silver 4309Y?

Yes. Xeon Silver 4509Y is the better all-around CPU here. It gives you a 0.1% average FPS lead across 50 shared CPU game tests in our data, 0.2% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Xeon Silver 4509Y is the better pick. According to our tests, it delivers 0.1% 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, Xeon Silver 4509Y is the stronger fit. You are getting 0.2% better PassMark, backed by 8 cores and 16 threads. It also has the larger cache pool with 87.5% larger total L3 cache (23 MB vs 12 MB).

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

Xeon Silver 4509Y still makes the most sense overall. Xeon Silver 4509Y comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 0.1% average FPS lead across 50 shared CPU game tests in our data.

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

Xeon Silver 4509Y makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2021), a healthier platform with LGA4677 and DDR5 instead of LGA4189, 87.5% larger total L3 cache (23 MB vs 12 MB), and more multi-core headroom with 8 cores / 16 threads instead of 8/16. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Xeon Silver 4309Y vs Xeon Silver 4509Y Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

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.

Xeon Silver 4509Y

The Xeon Silver 4509Y is manufactured by Intel. It was released in 14 December 2023 (1 year ago). It is based on the Sapphire Rapids (2023−2024) architecture. It features 8 cores and 16 threads. Base frequency is 2.6 GHz, with boost up to 4.1 GHz. L3 cache: 22.5 MB (total). L2 cache: 2 MB (per core). Built on Intel 7 nm process technology. Socket: LGA4677. Thermal design power (TDP): 125 Watt. Memory support: DDR5 @ 4400 MT/s (1 DPC &2DPC). Passmark benchmark score: 18,749 points. Launch price was $563.

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Processing Power

Both the Xeon Silver 4309Y and Xeon Silver 4509Y share an identical 8-core/16-thread configuration. Boost clocks reach 3.6 GHz on the Xeon Silver 4309Y versus 4.1 GHz on the Xeon Silver 4509Y — a 13% clock advantage for the Xeon Silver 4509Y (base: 2.8 GHz vs 2.6 GHz). The Xeon Silver 4309Y uses the Ice Lake-SP (2021) architecture (10 nm), while the Xeon Silver 4509Y uses Sapphire Rapids (2023−2024) (Intel 7 nm). In PassMark, the Xeon Silver 4309Y scores 18,718 against the Xeon Silver 4509Y's 18,749 — a 0.2% lead for the Xeon Silver 4509Y. L3 cache: 12 MB (total) on the Xeon Silver 4309Y vs 22.5 MB (total) on the Xeon Silver 4509Y.

Feature	Xeon Silver 4309Y	Xeon Silver 4509Y
Cores / Threads	8 / 16	8 / 16
Boost Clock	3.6 GHz	4.1 GHz+14%
Base Clock	2.8 GHz+8%	2.6 GHz
L3 Cache	12 MB (total)	22.5 MB (total)+88%
L2 Cache	1 MB (per core)	2 MB (per core)+100%
Process	10 nm	Intel 7 nm-30%
Architecture	Ice Lake-SP (2021)	Sapphire Rapids (2023−2024)
PassMark	18,718	18,749

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Memory & Platform

The Xeon Silver 4309Y uses the LGA4189 socket (PCIe 4.0), while the Xeon Silver 4509Y uses LGA4677 (PCIe 3.0) — making them incompatible on the same motherboard.