Core i7-5820K vs Xeon Bronze 3408U

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 i7-5820K vs Xeon Bronze 3408U 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 i7-5820K vs Xeon Bronze 3408U: Pros, Cons & Final Verdict

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

Core i7-5820K

2014

Why buy it

✅100+% more PCIe lanes (28 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon Bronze 3408U across 50 shared CPU benchmark tests.
❌Lower PassMark (9,826 vs 9,969).
❌Smaller total L3 cache (15 MB vs 23 MB).
❌Less compelling for workstation-style loads than Xeon Bronze 3408U, which brings 8 cores / 8 threads.
❌Launch MSRP is still $389 MSRP, while Xeon Bronze 3408U mostly shows up through inconsistent older-market listings.

Xeon Bronze 3408U

2023

Why buy it

✅Better for gaming: +8.8% higher average FPS across 50 shared CPU benchmark tests.
✅+50% larger total L3 cache (23 MB vs 15 MB).
✅Better for workstations and heavier parallel workloads: 8 cores / 8 threads.
✅Draws 125W instead of 140W, a 15W reduction.
✅Newer platform on LGA4677 with DDR5 support instead of LGA2011 and DDR4.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is Xeon Bronze 3408U better than Core i7-5820K?

Not really, because they are built for different jobs. Xeon Bronze 3408U makes more sense for workstation-style multi-core throughput, while Core i7-5820K is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Xeon Bronze 3408U is the better pick. According to our tests, it delivers 8.8% 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 Bronze 3408U is the stronger fit. You are getting 1.5% better PassMark, backed by 8 cores and 8 threads. It also has the larger cache pool with 50% larger total L3 cache (23 MB vs 15 MB).

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

Xeon Bronze 3408U is still the much better call for a fresh build. Xeon Bronze 3408U comes in at an unclear MSRP at unclear MSRP versus $389 MSRP, and it still gives you a 8.8% average FPS lead across 50 shared CPU game tests in our data. Core i7-5820K only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2014 platform. Even with 100.0% better value on paper (25.3 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA2011.

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

Xeon Bronze 3408U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2014), a healthier platform with LGA4677 and DDR5 instead of LGA2011, 50% larger total L3 cache (23 MB vs 15 MB), and more multi-core headroom with 8 cores / 8 threads instead of 6/12. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i7-5820K vs Xeon Bronze 3408U Technical Specifications

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

Core i7-5820K

The Core i7-5820K is manufactured by Intel. It was released in 1 September 2014 (11 years ago). It is based on the Haswell-E (2014) architecture. It features 6 cores and 12 threads. Base frequency is 3.3 GHz, with boost up to 3.6 GHz. L3 cache: 15 MB (total). L2 cache: 256 kB (per core). Built on 22 nm process technology. Socket: LGA2011. Thermal design power (TDP): 140 Watt. Memory support: DDR4. Passmark benchmark score: 9,826 points. Launch price was $410.

Xeon Bronze 3408U

The Xeon Bronze 3408U is manufactured by Intel. It was released in 10 January 2023 (2 years ago). It is based on the Sapphire Rapids (2023−2024) architecture. It features 8 cores and 8 threads. Base frequency is 1.8 GHz, with boost up to 1.9 GHz. L3 cache: 22.5 MB. L2 cache: 2 MB (per core). Built on Intel 7 nm process technology. Socket: LGA4677. Thermal design power (TDP): 125 Watt. Memory support: DDR5-4000. Passmark benchmark score: 9,969 points. Launch price was $425.

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Processing Power

The Core i7-5820K packs 6 cores / 12 threads, while the Xeon Bronze 3408U offers 8 cores / 8 threads — the Xeon Bronze 3408U has 2 more cores. Boost clocks reach 3.6 GHz on the Core i7-5820K versus 1.9 GHz on the Xeon Bronze 3408U — a 61.8% clock advantage for the Core i7-5820K (base: 3.3 GHz vs 1.8 GHz). The Core i7-5820K uses the Haswell-E (2014) architecture (22 nm), while the Xeon Bronze 3408U uses Sapphire Rapids (2023−2024) (Intel 7 nm). In PassMark, the Core i7-5820K scores 9,826 against the Xeon Bronze 3408U's 9,969 — a 1.4% lead for the Xeon Bronze 3408U. L3 cache: 15 MB (total) on the Core i7-5820K vs 22.5 MB on the Xeon Bronze 3408U.

Feature	Core i7-5820K	Xeon Bronze 3408U
Cores / Threads	6 / 12	8 / 8+33%
Boost Clock	3.6 GHz+89%	1.9 GHz
Base Clock	3.3 GHz+83%	1.8 GHz
L3 Cache	15 MB (total)	22.5 MB+50%
L2 Cache	256 kB (per core)	2 MB (per core)+700%
Process	22 nm	Intel 7 nm-68%
Architecture	Haswell-E (2014)	Sapphire Rapids (2023−2024)
PassMark	9,826	9,969+1%
Cinebench R23 Multi	5,700	—
Geekbench 6 Single	1,134	—
Geekbench 6 Multi	5,383	—

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Memory & Platform

The Core i7-5820K uses the LGA2011 socket (PCIe 3.0), while the Xeon Bronze 3408U uses LGA4677 (PCIe 4.0) — making them incompatible on the same motherboard.

Feature	Core i7-5820K	Xeon Bronze 3408U
Socket	LGA2011	LGA4677
PCIe Generation	PCIe 3.0	PCIe 4.0+33%
Max RAM Speed	DDR4-2133	—
Max RAM Capacity	64 GB	—
RAM Channels	4	—
ECC Support	No	—
PCIe Lanes	28	—

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Advanced Features

Virtualization: Yes (Core i7-5820K) / not specified (Xeon Bronze 3408U). Primary use case: Core i7-5820K targets Enthusiast Workstation. Direct competitor: Core i7-5820K rivals Ryzen 5 1600.