Core i9-11900T 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.

Core i9-11900T 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.

Core i9-11900T 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.

Core i9-11900T

2021

Why buy it

✅Better for gaming: +17.3% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 35W instead of 125W, a 90W reduction.
✅100+% more PCIe lanes (20 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel UHD Graphics 750, while Xeon Silver 4509Y needs a discrete GPU.
✅Includes a boxed cooler (Stock), unlike Xeon Silver 4509Y.

Trade-offs

❌Lower PassMark (18,620 vs 18,749).
❌Smaller total L3 cache (16 MB vs 23 MB).
❌Launch MSRP is still $439 MSRP, while Xeon Silver 4509Y mostly shows up through inconsistent older-market listings.
❌Older platform position on LGA1200 with DDR4, while Xeon Silver 4509Y moves to LGA4677 and DDR5.

Xeon Silver 4509Y

2023

Why buy it

✅+0.7% higher PassMark.
✅+40.6% larger total L3 cache (23 MB vs 16 MB).
✅Newer platform on LGA4677 with DDR5 support instead of LGA1200 and DDR4.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-11900T across 50 shared CPU benchmark tests.
❌257.1% higher power demand at 125W vs 35W.
❌No integrated graphics, while Core i9-11900T can still boot and troubleshoot without a discrete GPU.
❌No boxed cooler included, unlike Core i9-11900T.

Quick Answers

So, is Core i9-11900T better than Xeon Silver 4509Y?

Not really, because they are built for different jobs. Xeon Silver 4509Y makes more sense for workstation-style multi-core throughput, while Core i9-11900T is the more practical desktop choice for gaming, platform cost, and everyday use.

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 0.7% better PassMark, backed by 8 cores and 16 threads. It also has the larger cache pool with 40.6% larger total L3 cache (23 MB vs 16 MB).

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

Core i9-11900T is the better buy right now. Core i9-11900T comes in at an unclear MSRP at $439 MSRP versus unclear MSRP, and it still gives you a 17.3% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Xeon Silver 4509Y is still stronger for heavier multi-core work with 0.7% better PassMark. It is also 100.0% better value on MSRP (42.4 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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 LGA1200, 40.6% larger total L3 cache (23 MB vs 16 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.

Core i9-11900T vs Xeon Silver 4509Y Technical Specifications

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

Core i9-11900T

The Core i9-11900T is manufactured by Intel. It was released in 16 March 2021 (4 years ago). It is based on the Rocket Lake (2021) architecture. It features 8 cores and 16 threads. Base frequency is 1.5 GHz, with boost up to 4.9 GHz. L3 cache: 16 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 35 Watt. Memory support: DDR4-3200. Passmark benchmark score: 18,620 points. Launch price was $299.

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.

⚡

Processing Power

Both the Core i9-11900T and Xeon Silver 4509Y share an identical 8-core/16-thread configuration. Boost clocks reach 4.9 GHz on the Core i9-11900T versus 4.1 GHz on the Xeon Silver 4509Y — a 17.8% clock advantage for the Core i9-11900T (base: 1.5 GHz vs 2.6 GHz). The Core i9-11900T uses the Rocket Lake (2021) architecture (14 nm), while the Xeon Silver 4509Y uses Sapphire Rapids (2023−2024) (Intel 7 nm). In PassMark, the Core i9-11900T scores 18,620 against the Xeon Silver 4509Y's 18,749 — a 0.7% lead for the Xeon Silver 4509Y. L3 cache: 16 MB (total) on the Core i9-11900T vs 22.5 MB (total) on the Xeon Silver 4509Y.

Feature	Core i9-11900T	Xeon Silver 4509Y
Cores / Threads	8 / 16	8 / 16
Boost Clock	4.9 GHz+20%	4.1 GHz
Base Clock	1.5 GHz	2.6 GHz+73%
L3 Cache	16 MB (total)	22.5 MB (total)+41%
L2 Cache	256K (per core)+12700%	2 MB (per core)
Process	14 nm	Intel 7 nm-50%
Architecture	Rocket Lake (2021)	Sapphire Rapids (2023−2024)
PassMark	18,620	18,749
Geekbench 6 Single	2,100	—
Geekbench 6 Multi	9,200	—

🧠

Memory & Platform

The Core i9-11900T uses the LGA1200 socket (PCIe 3.0), while the Xeon Silver 4509Y uses LGA4677 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i9-11900T	Xeon Silver 4509Y
Socket	LGA1200	LGA4677
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-3200	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	20	—

🔧

Advanced Features

Virtualization: VT-x, VT-d (Core i9-11900T) / not specified (Xeon Silver 4509Y). The Core i9-11900T includes integrated graphics (Intel UHD Graphics 750), while the Xeon Silver 4509Y requires a dedicated GPU. Primary use case: Core i9-11900T targets Low Power High Perf Desktop.