Core i7-3820 vs Ryzen 7 3700X

CPU

GPU

Core i7-3820

4 Cores8 Thrd130 WWMax: 3.8 GHz2012

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Ryzen 7 3700X

8 Cores16 Thrd65 WWMax: 4.4 GHz2019

Ryzen family

·······

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Core i7-3820 vs Ryzen 7 3700X Performance Spectrum

Core i7-3820

4 / 8

5,787

0.0%

22,430

+287.6%

Ryzen Threadripper PRO 3955WX

Ryzen 9 9900X3D

Ryzen Threadripper PRO 5975WX

Ryzen Threadripper 9960X

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 i7-3820 vs Ryzen 7 3700X 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 i7-3820 vs Ryzen 7 3700X: Pros, Cons & Final Verdict

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

Core i7-3820

2012

Why buy it

✅Costs $43 less on MSRP ($286 MSRP vs $329 MSRP).
✅66.7% more PCIe lanes (40 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 3700X across 50 shared CPU benchmark tests.
❌Lower PassMark (5,787 vs 22,430).
❌Smaller total L3 cache (10 MB vs 32 MB).
❌Lower PassMark per dollar, at 20.2 vs 68.2 PassMark/$ ($286 MSRP vs $329 MSRP).
❌100% higher power demand at 130W vs 65W.

Ryzen 7 3700X

2019

Why buy it

✅Better for gaming: +125.2% higher average FPS across 50 shared CPU benchmark tests.
✅+220% larger total L3 cache (32 MB vs 10 MB).
✅Delivers 236.9% more PassMark for each dollar spent, at 68.2 vs 20.2 PassMark/$ ($329 MSRP vs $286 MSRP).
✅Draws 65W instead of 130W, a 65W reduction.

Trade-offs

❌
15% HIGHER MSRP
$329 MSRPvs$286 MSRP

Quick Answers

So, is Ryzen 7 3700X better than Core i7-3820?

Yes. Ryzen 7 3700X is the better all-around CPU here. It gives you a 125.2% average FPS lead across 50 shared CPU game tests in our data, 287.6% 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, Ryzen 7 3700X is the better pick. According to our tests, it delivers 125.2% 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 3700X is the stronger fit. You are getting 287.6% better PassMark, backed by 8 cores and 16 threads. It also has the larger cache pool with 220% larger total L3 cache (32 MB vs 10 MB).

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

Ryzen 7 3700X is the better buy right now. Ryzen 7 3700X comes in 15.0% more expensive on MSRP at $329 MSRP versus $286 MSRP, and it still gives you a 125.2% average FPS lead across 50 shared CPU game tests in our data. It is also 236.9% better value on MSRP (68.2 vs 20.2 PassMark/$), 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 3700X makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2012), 220% larger total L3 cache (32 MB vs 10 MB), and more multi-core headroom with 8 cores / 16 threads instead of 4/8. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core i7-3820 vs Ryzen 7 3700X Technical Specifications

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

Core i7-3820

The Core i7-3820 is manufactured by Intel. It was released in Fevereiro 2012 (13 years ago). It is based on the Sandy Bridge-E (2011−2013) architecture. It features 4 cores and 8 threads. Base frequency is 3.6 GHz, with boost up to 3.8 GHz. L3 cache: 10240 kB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA2011. Thermal design power (TDP): 130 Watt. Memory support: DDR3. Passmark benchmark score: 5,787 points. Launch price was $400.

Ryzen 7 3700X

The Ryzen 7 3700X is manufactured by AMD. It was released in 7 July 2019 (6 years ago). It is based on the Matisse (Zen 2) (2019−2020) architecture. It features 8 cores and 16 threads. Base frequency is 3.6 GHz, with boost up to 4.4 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 65 Watt. Memory support: DDR4 Dual-channel. Passmark benchmark score: 22,430 points. Launch price was $329.

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Processing Power

The Core i7-3820 packs 4 cores / 8 threads, while the Ryzen 7 3700X offers 8 cores / 16 threads — the Ryzen 7 3700X has 4 more cores. Boost clocks reach 3.8 GHz on the Core i7-3820 versus 4.4 GHz on the Ryzen 7 3700X — a 14.6% clock advantage for the Ryzen 7 3700X (base: 3.6 GHz vs 3.6 GHz). The Core i7-3820 uses the Sandy Bridge-E (2011−2013) architecture (32 nm), while the Ryzen 7 3700X uses Matisse (Zen 2) (2019−2020) (7 nm, 12 nm). In PassMark, the Core i7-3820 scores 5,787 against the Ryzen 7 3700X's 22,430 — a 118% lead for the Ryzen 7 3700X. L3 cache: 10240 kB (total) on the Core i7-3820 vs 32 MB on the Ryzen 7 3700X.

Feature	Core i7-3820	Ryzen 7 3700X
Cores / Threads	4 / 8	8 / 16+100%
Boost Clock	3.8 GHz	4.4 GHz+16%
Base Clock	3.6 GHz	3.6 GHz
L3 Cache	10240 kB (total)	32 MB+220%
L2 Cache	256 kB (per core)	512K (per core)+100%
Process	32 nm	7 nm, 12 nm-78%
Architecture	Sandy Bridge-E (2011−2013)	Matisse (Zen 2) (2019−2020)
PassMark	5,787	22,430+288%
Geekbench 6 Single	624	—

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Memory & Platform

The Core i7-3820 uses the LGA2011 socket (PCIe 2.0), while the Ryzen 7 3700X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1600 on the Core i7-3820 versus DDR4-3200 on the Ryzen 7 3700X — the Ryzen 7 3700X supports 100% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 7 3700X supports up to 128 GB of RAM compared to 64 GB — 100% more capacity for professional workloads. Memory channels: 4 (Core i7-3820) vs 2 (Ryzen 7 3700X). PCIe lanes: 40 (Core i7-3820) vs 24 (Ryzen 7 3700X) — the Core i7-3820 offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: X79 (Core i7-3820) and AMD 500 series,AMD 400 series,AMD 300 series (Ryzen 7 3700X).

Feature	Core i7-3820	Ryzen 7 3700X
Socket	LGA2011	AM4
PCIe Generation	PCIe 2.0	PCIe 4.0+100%
Max RAM Speed	DDR3-1600	DDR4-3200+100%
Max RAM Capacity	64 GB	128 GB+100%
RAM Channels	4+100%	2
ECC Support	No	Yes
PCIe Lanes	40+67%	24

🔧

Advanced Features

Virtualization: VT-x, VT-d, EPT (Core i7-3820) / not specified (Ryzen 7 3700X). Primary use case: Core i7-3820 targets HEDT Desktop. Direct competitor: Core i7-3820 rivals FX-8350.

Feature	Core i7-3820	Ryzen 7 3700X
Integrated GPU	No	No
IGPU Model	None	—
Unlocked	Yes	—
AVX-512	No	—
Virtualization	VT-x, VT-d, EPT	—
Target Use	HEDT Desktop	—

💰

Value Analysis

At launch, the Core i7-3820 was priced at $286, while the Ryzen 7 3700X came in at $329. On launch pricing ($286 vs $329), Core i7-3820 was $43 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i7-3820 delivers 20.2 pts/$ vs 68.2 pts/$ for the Ryzen 7 3700X — making the Ryzen 7 3700X the 108.5% better value option.

Feature	Core i7-3820	Ryzen 7 3700X
MSRP	$286-13%	$329
Performance per Dollar	20.2	68.2+238%
Release Date	2012	2019

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