Core i7-5820K vs Ryzen 7 7800X3D

CPU

GPU

Core i7-5820K

6 Cores12 Thrd140 WWMax: 3.6 GHz2014

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Ryzen 7 7800X3D

8 Cores16 Thrd120 WWMax: 5 GHz2023

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Core i7-5820K vs Ryzen 7 7800X3D Performance Spectrum

Core i7-5820K

6 / 12

9,826

0.0%

34,293

+249.0%

Ryzen Threadripper PRO 7965WX

Ryzen Threadripper 7970X

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.

Core i7-5820K vs Ryzen 7 7800X3D 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 Ryzen 7 7800X3D: 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

✅Costs $60 less on MSRP ($389 MSRP vs $449 MSRP).

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 7800X3D across 34 shared CPU benchmark tests.
❌Lower Cinebench R23 multi-core (5,700 vs 18,500).
❌Lower PassMark per dollar, at 25.3 vs 76.4 PassMark/$ ($389 MSRP vs $449 MSRP).
❌16.7% higher power demand at 140W vs 120W.
❌Older platform position on LGA2011 with DDR4, while Ryzen 7 7800X3D moves to AM5 and DDR5.

Ryzen 7 7800X3D

2023

Why buy it

✅Better for gaming: +92.7% higher average FPS across 34 shared CPU benchmark tests.
✅Delivers 202.4% more PassMark for each dollar spent, at 76.4 vs 25.3 PassMark/$ ($449 MSRP vs $389 MSRP).
✅Draws 120W instead of 140W, a 20W reduction.
✅Newer platform on AM5 with DDR5 support instead of LGA2011 and DDR4.
✅Integrated graphics onboard with AMD Radeon Graphics (2-core), while Core i7-5820K needs a discrete GPU.

Trade-offs

❌
15.4% HIGHER MSRP
$449 MSRPvs$389 MSRP

Quick Answers

So, is Ryzen 7 7800X3D better than Core i7-5820K?

Yes. Ryzen 7 7800X3D is the better all-around CPU here. It gives you a 92.7% average FPS lead across 34 shared CPU game tests in our data, 224.6% better Cinebench R23 multi-core, 249.0% higher 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, Ryzen 7 7800X3D is the better pick. According to our tests, it delivers 92.7% more average FPS across 34 shared CPU game tests. It also has a clear cache advantage at 96 MB versus 15 MB.

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

For streaming, content creation, and heavier multitasking, Ryzen 7 7800X3D is the stronger fit. You are getting 224.6% better Cinebench R23 multi-core, backed by 8 cores and 16 threads. It also has the larger cache pool with 540% larger total L3 cache (96 MB vs 15 MB).

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

Ryzen 7 7800X3D is the better buy right now. Ryzen 7 7800X3D comes in 15.4% more expensive on MSRP at $449 MSRP versus $389 MSRP, and it still gives you a 92.7% average FPS lead across 34 shared CPU game tests in our data. It is also 202.4% better value on MSRP (76.4 vs 25.3 PassMark/$), 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 7800X3D makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2014), a healthier platform with AM5 and DDR5 instead of LGA2011, 3D V-Cache and a much larger 96 MB L3 cache instead of 15 MB, and more multi-core headroom with 8 cores / 16 threads instead of 6/12. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i7-5820K vs Ryzen 7 7800X3D 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.

Ryzen 7 7800X3D

The Ryzen 7 7800X3D is manufactured by AMD. It was released in 4 January 2023 (2 years ago). It is based on the Raphael (Zen4) (2022−2023) architecture. It features 8 cores and 16 threads. Base frequency is 4.4 GHz, with boost up to 5 GHz. L3 cache: 96 MB (total). L2 cache: 1 MB (per core). Built on 5 nm process technology. Socket: AM5. Thermal design power (TDP): 120 Watt. Memory support: DDR5-5200. Passmark benchmark score: 34,293 points. Launch price was $449.

⚡

Processing Power

The Core i7-5820K packs 6 cores / 12 threads, while the Ryzen 7 7800X3D offers 8 cores / 16 threads — the Ryzen 7 7800X3D has 2 more cores. Boost clocks reach 3.6 GHz on the Core i7-5820K versus 5 GHz on the Ryzen 7 7800X3D — a 32.6% clock advantage for the Ryzen 7 7800X3D (base: 3.3 GHz vs 4.4 GHz). The Core i7-5820K uses the Haswell-E (2014) architecture (22 nm), while the Ryzen 7 7800X3D uses Raphael (Zen4) (2022−2023) (5 nm). In PassMark, the Core i7-5820K scores 9,826 against the Ryzen 7 7800X3D's 34,293 — a 110.9% lead for the Ryzen 7 7800X3D. Cinebench R23 multi-core: 5,700 vs 18,500 (105.8% advantage for the Ryzen 7 7800X3D). Geekbench 6 single-core — the metric most relevant to gaming — records 1,134 vs 2,700, a 81.7% lead for the Ryzen 7 7800X3D that directly translates to higher frame rates. Multi-core Geekbench: 5,383 vs 15,000 (94.4% advantage for the Ryzen 7 7800X3D). L3 cache: 15 MB (total) on the Core i7-5820K vs 96 MB (total) on the Ryzen 7 7800X3D.

Feature	Core i7-5820K	Ryzen 7 7800X3D
Cores / Threads	6 / 12	8 / 16+33%
Boost Clock	3.6 GHz	5 GHz+39%
Base Clock	3.3 GHz	4.4 GHz+33%
L3 Cache	15 MB (total)	96 MB (total)+540%
L2 Cache	256 kB (per core)	1 MB (per core)+300%
Process	22 nm	5 nm-77%
Architecture	Haswell-E (2014)	Raphael (Zen4) (2022−2023)
PassMark	9,826	34,293+249%
Cinebench R23 Multi	5,700	18,500+225%
Geekbench 6 Single	1,134	2,700+138%
Geekbench 6 Multi	5,383	15,000+179%

🧠

Memory & Platform

The Core i7-5820K uses the LGA2011 socket (PCIe 3.0), while the Ryzen 7 7800X3D uses AM5 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2133 on the Core i7-5820K versus DDR5-5200 on the Ryzen 7 7800X3D — the Ryzen 7 7800X3D supports 143.8% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 7 7800X3D supports up to 128 GB of RAM compared to 64 GB — 100% more capacity for professional workloads. Memory channels: 4 (Core i7-5820K) vs 2 (Ryzen 7 7800X3D). Both provide 28 PCIe lanes. Chipset compatibility: Intel X99 (Core i7-5820K) and X670E,X670,B650E,B650,A620 (Ryzen 7 7800X3D).

Feature	Core i7-5820K	Ryzen 7 7800X3D
Socket	LGA2011	AM5
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	DDR4-2133	DDR5-5200+144%
Max RAM Capacity	64 GB	128 GB+100%
RAM Channels	4+100%	2
ECC Support	No	Yes
PCIe Lanes	28	28

🔧

Advanced Features

Both processors feature an unlocked multiplier for overclocking. Only the Ryzen 7 7800X3D supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: Yes (Core i7-5820K) vs AMD-V (Ryzen 7 7800X3D). The Ryzen 7 7800X3D includes integrated graphics (AMD Radeon Graphics (2-core)), while the Core i7-5820K requires a dedicated GPU. Primary use case: Core i7-5820K targets Enthusiast Workstation, Ryzen 7 7800X3D targets Gaming. Direct competitor: Core i7-5820K rivals Ryzen 5 1600; Ryzen 7 7800X3D rivals Intel Core i7-14700K.

Feature	Core i7-5820K	Ryzen 7 7800X3D
Integrated GPU	No	Yes
IGPU Model	—	AMD Radeon Graphics (2-core)
Unlocked	Yes	Yes
AVX-512	No	Yes
Virtualization	Yes	AMD-V
Target Use	Enthusiast Workstation	Gaming

💰

Value Analysis

At launch, the Core i7-5820K was priced at $389, while the Ryzen 7 7800X3D came in at $449. On launch pricing ($389 vs $449), Core i7-5820K was $60 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i7-5820K delivers 25.3 pts/$ vs 76.4 pts/$ for the Ryzen 7 7800X3D — making the Ryzen 7 7800X3D the 100.6% better value option.

Feature	Core i7-5820K	Ryzen 7 7800X3D
MSRP	$389-13%	$449
Performance per Dollar	25.3	76.4+202%
Release Date	2014	2023

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