Core i9-12900KS vs EPYC 7343

CPU

GPU

Core i9-12900KS

16 Cores24 Thrd150 WWMax: 5.3 GHz2022

Core family

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EPYC 7343

16 Cores32 Thrd190 WWMax: 3.9 GHz2021

EPYC family

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Core i9-12900KS vs EPYC 7343 Performance Spectrum

Core i9-12900KS

16 / 24

43,528

0.0%

43,644

+0.3%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper PRO 5975WX

Ryzen Threadripper 9960X

Ryzen Threadripper PRO 9975WX

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 i9-12900KS vs EPYC 7343 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 i9-12900KS vs EPYC 7343: Pros, Cons & Final Verdict

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

Core i9-12900KS

2022

Why buy it

✅Better for gaming: +21.4% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $826 less on MSRP ($739 MSRP vs $1,565 MSRP).
✅Delivers 111.2% more PassMark for each dollar spent, at 58.9 vs 27.9 PassMark/$ ($739 MSRP vs $1,565 MSRP).
✅Draws 150W instead of 190W, a 40W reduction.
✅Newer platform on LGA1700 with DDR5 support instead of SP3 and DDR4.

Trade-offs

❌Lower PassMark (43,528 vs 43,644).
❌Smaller total L3 cache (30 MB vs 128 MB).
❌Less compelling for workstation-style loads than EPYC 7343, which brings 16 cores / 32 threads and 128 PCIe lanes.

EPYC 7343

2021

Why buy it

✅+0.3% higher PassMark.
✅+326.7% larger total L3 cache (128 MB vs 30 MB).
✅Better for workstations and heavier parallel workloads: 16 cores / 32 threads, plus 128 PCIe lanes vs 20.
✅540% more PCIe lanes (128 vs 20) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-12900KS across 50 shared CPU benchmark tests.
❌Lower PassMark per dollar, at 27.9 vs 58.9 PassMark/$ ($1,565 MSRP vs $739 MSRP).
❌26.7% higher power demand at 190W vs 150W.
❌Older platform position on SP3 with DDR4, while Core i9-12900KS moves to LGA1700 and DDR5.
❌No integrated graphics, while Core i9-12900KS can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i9-12900KS better than EPYC 7343?

Not really, because they are built for different jobs. EPYC 7343 makes more sense for workstation-style multi-core throughput, while Core i9-12900KS 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, EPYC 7343 is the stronger fit. You are getting 0.3% better PassMark, backed by 16 cores and 32 threads. It also has the larger cache pool with 326.7% larger total L3 cache (128 MB vs 30 MB).

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

Core i9-12900KS is the better buy right now. Core i9-12900KS comes in $826 cheaper on MSRP at $739 MSRP versus $1,565 MSRP, and it still gives you a 21.4% average FPS lead across 50 shared CPU game tests in our data. The compromise is that EPYC 7343 is still stronger for heavier multi-core work with 0.3% better PassMark. It is also 111.2% better value on MSRP (58.9 vs 27.9 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core i9-12900KS makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2021) and a healthier platform with LGA1700 and DDR5 instead of SP3. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i9-12900KS vs EPYC 7343 Technical Specifications

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

Core i9-12900KS

The Core i9-12900KS is manufactured by Intel. It was released in 5 April 2022 (3 years ago). It is based on the Alder Lake-S (2022) architecture. It features 16 cores and 24 threads. Base frequency is 3.4 GHz, with boost up to 5.3 GHz. L3 cache: 30 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: LGA1700. Thermal design power (TDP): 150 Watt. Memory support: DDR5-4800, DDR4-3200. Passmark benchmark score: 43,528 points. Launch price was $499.

EPYC 7343

The EPYC 7343 is manufactured by AMD. It was released in 15 March 2021 (4 years ago). It is based on the Milan (2021−2023) architecture. It features 16 cores and 32 threads. Base frequency is 3.2 GHz, with boost up to 3.9 GHz. L3 cache: 128 MB (total). L2 cache: 512 kB (per core). Built on 7 nm+ process technology. Socket: SP3. Thermal design power (TDP): 190 Watt. Memory support: DDR4-3200. Passmark benchmark score: 43,644 points. Launch price was $1,565.

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Processing Power

The Core i9-12900KS packs 16 cores / 24 threads, matching the EPYC 7343's 16 cores. Boost clocks reach 5.3 GHz on the Core i9-12900KS versus 3.9 GHz on the EPYC 7343 — a 30.4% clock advantage for the Core i9-12900KS (base: 3.4 GHz vs 3.2 GHz). The Core i9-12900KS uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the EPYC 7343 uses Milan (2021−2023) (7 nm+). In PassMark, the Core i9-12900KS scores 43,528 against the EPYC 7343's 43,644 — a 0.3% lead for the EPYC 7343. L3 cache: 30 MB (total) on the Core i9-12900KS vs 128 MB (total) on the EPYC 7343.

Feature	Core i9-12900KS	EPYC 7343
Cores / Threads	16 / 24	16 / 32
Boost Clock	5.3 GHz+36%	3.9 GHz
Base Clock	3.4 GHz+6%	3.2 GHz
L3 Cache	30 MB (total)	128 MB (total)+327%
L2 Cache	1.25 MB (per core)+150%	512 kB (per core)
Process	Intel 7 nm	7 nm+
Architecture	Alder Lake-S (2022)	Milan (2021−2023)
PassMark	43,528	43,644
Cinebench R23 Multi	27,796	—
Geekbench 6 Single	2,082	—

🧠

Memory & Platform

The Core i9-12900KS uses the LGA1700 socket (PCIe 5.0), while the EPYC 7343 uses SP3 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800 on the Core i9-12900KS versus 3200 on the EPYC 7343 — the Core i9-12900KS supports 50% faster memory, which can translate to measurable gains in memory-sensitive workloads. The EPYC 7343 supports up to 4096 GB of RAM compared to 128 GB — 3100% more capacity for professional workloads. Memory channels: 2 (Core i9-12900KS) vs 8 (EPYC 7343). PCIe lanes: 20 (Core i9-12900KS) vs 128 (EPYC 7343) — the EPYC 7343 offers 108 more lanes for additional GPUs or NVMe drives. Chipset compatibility: LGA1700 (Core i9-12900KS) and SP3 (EPYC 7343).

Feature	Core i9-12900KS	EPYC 7343
Socket	LGA1700	SP3
PCIe Generation	PCIe 5.0+25%	PCIe 4.0
Max RAM Speed	DDR5-4800+50%	3200
Max RAM Capacity	128 GB	4096 GB+3100%
RAM Channels	2	8+300%
ECC Support	Yes	Yes
PCIe Lanes	20	128+540%

🔧

Advanced Features

Only the Core i9-12900KS has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Virtualization support: VT-x, VT-d (Core i9-12900KS) vs VT-x, VT-d, AMD-V (EPYC 7343). The Core i9-12900KS includes integrated graphics (UHD 770), while the EPYC 7343 requires a dedicated GPU. Direct competitor: EPYC 7343 rivals Xeon Gold 6248.

Feature	Core i9-12900KS	EPYC 7343
Integrated GPU	Yes	No
IGPU Model	UHD 770	None
Unlocked	Yes	No
AVX-512	Yes	Yes
Virtualization	VT-x, VT-d	VT-x, VT-d, AMD-V

💰

Value Analysis

At launch, the Core i9-12900KS was priced at $739, while the EPYC 7343 came in at $1565. On launch pricing ($739 vs $1565), Core i9-12900KS was $826 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i9-12900KS delivers 58.9 pts/$ vs 27.9 pts/$ for the EPYC 7343 — making the Core i9-12900KS the 71.5% better value option.

Feature	Core i9-12900KS	EPYC 7343
MSRP	$739-53%	$1565
Performance per Dollar	58.9+111%	27.9
Release Date	2022	2021

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