Ryzen 7 5800X vs Xeon E3-1205 v6

Ryzen 7 5800X vs Xeon E3-1205 v6 Performance Spectrum

Ryzen 7 5800X

8 / 16

27,712

+387.7%

Ryzen Threadripper 3990X

Ryzen Threadripper PRO 9965WX

Xeon E3-1205 v6

4 / 8

5,682

0.0%

About PassMark

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.

Ryzen 7 5800X vs Xeon E3-1205 v6 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.

Ryzen 7 5800X vs Xeon E3-1205 v6: Pros, Cons & Final Verdict

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

Ryzen 7 5800X

2020

Why buy it

✅Better for gaming: +158.4% higher average FPS across 50 shared CPU benchmark tests.
✅+300% larger total L3 cache (32 MB vs 8 MB).
✅100+% more PCIe lanes (24 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $449 MSRP, while Xeon E3-1205 v6 mostly shows up through inconsistent older-market listings.
❌61.5% higher power demand at 105W vs 65W.

Xeon E3-1205 v6

2017

Why buy it

✅Draws 65W instead of 105W, a 40W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 5800X across 50 shared CPU benchmark tests.
❌Lower PassMark (5,682 vs 27,712).
❌Smaller total L3 cache (8 MB vs 32 MB).

Quick Answers

So, is Ryzen 7 5800X better than Xeon E3-1205 v6?

Not really, because they are built for different jobs. Xeon E3-1205 v6 makes more sense for workstation-style multi-core throughput, while Ryzen 7 5800X is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Ryzen 7 5800X is the better pick. According to our tests, it delivers 158.4% 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, Ryzen 7 5800X is the stronger fit. You are getting 387.7% better PassMark, backed by 8 cores and 16 threads. It also has the larger cache pool with 300% larger total L3 cache (32 MB vs 8 MB).

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

Ryzen 7 5800X is the better buy right now. Ryzen 7 5800X comes in at an unclear MSRP at $449 MSRP versus unclear MSRP, and it still gives you a 158.4% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (61.7 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Ryzen 7 5800X makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2017), 300% larger total L3 cache (32 MB vs 8 MB), and more multi-core headroom with 8 cores / 16 threads instead of 4/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Ryzen 7 5800X vs Xeon E3-1205 v6 Technical Specifications

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

Ryzen 7 5800X

The Ryzen 7 5800X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen 3) (2020−2022) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 4.7 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4. Passmark benchmark score: 27,712 points. Launch price was $449.

Xeon E3-1205 v6

The Xeon E3-1205 v6 is manufactured by Intel. It was released in 28 March 2017 (8 years ago). It is based on the Kaby Lake (2016−2019) architecture. It features 4 cores and 4 threads. Base frequency is 3 GHz, with boost up to 3 GHz. L3 cache: 8 MB. L2 cache: 1 MB. Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 65 Watt. Memory support: DDR4-2400, DDR3L-1866. Passmark benchmark score: 5,682 points. Launch price was $193.

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Processing Power

The Ryzen 7 5800X packs 8 cores / 16 threads, while the Xeon E3-1205 v6 offers 4 cores / 4 threads — the Ryzen 7 5800X has 4 more cores. Boost clocks reach 4.7 GHz on the Ryzen 7 5800X versus 3 GHz on the Xeon E3-1205 v6 — a 44.2% clock advantage for the Ryzen 7 5800X (base: 3.8 GHz vs 3 GHz). The Ryzen 7 5800X uses the Vermeer (Zen 3) (2020−2022) architecture (7 nm, 12 nm), while the Xeon E3-1205 v6 uses Kaby Lake (2016−2019) (14 nm). In PassMark, the Ryzen 7 5800X scores 27,712 against the Xeon E3-1205 v6's 5,682 — a 131.9% lead for the Ryzen 7 5800X. L3 cache: 32 MB on the Ryzen 7 5800X vs 8 MB on the Xeon E3-1205 v6.

Feature	Ryzen 7 5800X	Xeon E3-1205 v6
Cores / Threads	8 / 16+100%	4 / 4
Boost Clock	4.7 GHz+57%	3 GHz
Base Clock	3.8 GHz+27%	3 GHz
L3 Cache	32 MB+300%	8 MB
L2 Cache	512K (per core)+51100%	1 MB
Process	7 nm, 12 nm-50%	14 nm
Architecture	Vermeer (Zen 3) (2020−2022)	Kaby Lake (2016−2019)
PassMark	27,712+388%	5,682

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Memory & Platform

The Ryzen 7 5800X uses the AM4 socket (PCIe 4.0), while the Xeon E3-1205 v6 uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard.