EPYC 7643 vs Xeon 6740E

CPU

GPU

EPYC 7643

48 Cores96 Thrd225 WWMax: 3.6 GHz2021

EPYC family

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Xeon 6740E

96 Cores96 Thrd250 WWMax: 3.2 GHz2024

Similar parts

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EPYC 7643 vs Xeon 6740E Performance Spectrum

EPYC 7643

48 / 96

76,050

0.0%

Ryzen 7 8840HX

Ryzen 9 7900X3D

Ryzen 9 7945HX3D

Ryzen Threadripper PRO 9955WX

Ryzen Threadripper 9960X

Ryzen Threadripper 7970X

Ryzen Threadripper PRO 7985WX

Ryzen Threadripper 7980X

Xeon 6740E

96 / 96

76,167

+0.2%

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.

EPYC 7643 vs Xeon 6740E 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.

EPYC 7643 vs Xeon 6740E: Pros, Cons & Final Verdict

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

EPYC 7643

2021

Why buy it

✅+166.7% larger total L3 cache (256 MB vs 96 MB).
✅Costs $270 less on MSRP ($4,995 MSRP vs $5,265 MSRP).
✅Draws 225W instead of 250W, a 25W reduction.
✅60% more PCIe lanes (128 vs 80) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (76,050 vs 76,167).
❌Older platform position on SP3 with DDR4, while Xeon 6740E moves to LGA4710 and DDR5.
❌No AVX-512 support for niche heavy compute workloads where it can matter.

Xeon 6740E

2024

Why buy it

✅+0.2% higher PassMark.
✅Newer platform on LGA4710 with DDR5 support instead of SP3 and DDR4.
✅AVX-512 support for select workstation, AI, and scientific workloads.

Trade-offs

❌Smaller total L3 cache (96 MB vs 256 MB).
❌
5.4% HIGHER MSRP
$5,265 MSRPvs$4,995 MSRP

Quick Answers

So, is EPYC 7643 better than Xeon 6740E?

It depends on what you want from the system. For gaming, EPYC 7643 is ahead with a 0.5% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Xeon 6740E pulls ahead with 0.2% better PassMark. EPYC 7643 also has the bigger cache pool with 166.7% larger total L3 cache (256 MB vs 96 MB).

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

For streaming, content creation, and heavier multitasking, Xeon 6740E is the stronger fit. You are getting 0.2% better PassMark, backed by 96 cores and 96 threads.

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

EPYC 7643 is the better buy right now. EPYC 7643 comes in $270 cheaper on MSRP at $4,995 MSRP versus $5,265 MSRP, and it still gives you a 0.5% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Xeon 6740E is still stronger for heavier multi-core work with 0.2% better PassMark. It is also 5.2% better value on MSRP (15.2 vs 14.5 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Xeon 6740E makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2024 vs 2021), a healthier platform with LGA4710 and DDR5 instead of SP3, more multi-core headroom with 96 cores / 96 threads instead of 48/96, and AVX-512 support for heavier modern compute workloads. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

EPYC 7643 vs Xeon 6740E Technical Specifications

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

EPYC 7643

The EPYC 7643 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 48 cores and 96 threads. Base frequency is 2.3 GHz, with boost up to 3.6 GHz. L3 cache: 256 MB (total). L2 cache: 512 kB (per core). Built on 7 nm+ process technology. Socket: SP3. Thermal design power (TDP): 225 Watt. Memory support: DDR4-3200. Passmark benchmark score: 76,050 points. Launch price was $4,995.

Xeon 6740E

The Xeon 6740E is manufactured by Intel. It was released in 3 June 2024 (1 year ago). It is based on the Sierra Forest (2024) architecture. It features 96 cores and 96 threads. Base frequency is 2.4 GHz, with boost up to 3.2 GHz. L3 cache: 96 MB (total). L2 cache: 4 MB (per module). Built on Intel 3 nm process technology. Socket: LGA4710. Thermal design power (TDP): 250 Watt. Memory support: DDR5-6400. Passmark benchmark score: 76,167 points. Launch price was $5,265.

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Processing Power

The EPYC 7643 packs 48 cores / 96 threads, while the Xeon 6740E offers 96 cores / 96 threads — the Xeon 6740E has 48 more cores. Boost clocks reach 3.6 GHz on the EPYC 7643 versus 3.2 GHz on the Xeon 6740E — a 11.8% clock advantage for the EPYC 7643 (base: 2.3 GHz vs 2.4 GHz). The EPYC 7643 uses the Milan (2021−2023) architecture (7 nm+), while the Xeon 6740E uses Sierra Forest (2024) (Intel 3 nm). In PassMark, the EPYC 7643 scores 76,050 against the Xeon 6740E's 76,167 — a 0.2% lead for the Xeon 6740E. L3 cache: 256 MB (total) on the EPYC 7643 vs 96 MB (total) on the Xeon 6740E.

Feature	EPYC 7643	Xeon 6740E
Cores / Threads	48 / 96	96 / 96+100%
Boost Clock	3.6 GHz+12%	3.2 GHz
Base Clock	2.3 GHz	2.4 GHz+4%
L3 Cache	256 MB (total)+167%	96 MB (total)
L2 Cache	512 kB (per core)	4 MB (per module)+700%
Process	7 nm+	Intel 3 nm-57%
Architecture	Milan (2021−2023)	Sierra Forest (2024)
PassMark	76,050	76,167
Geekbench 6 Single	1,671	—
Geekbench 6 Multi	15,000	—

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Memory & Platform

The EPYC 7643 uses the SP3 socket (PCIe 4.0), while the Xeon 6740E uses LGA4710 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the EPYC 7643 versus 6400 on the Xeon 6740E — the Xeon 6740E supports 100% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon 6740E supports up to 4096 TB of RAM compared to 4 TB — 102300% more capacity for professional workloads. Both feature 8-channel memory with ECC support. PCIe lanes: 128 (EPYC 7643) vs 80 (Xeon 6740E) — the EPYC 7643 offers 48 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SP3 (EPYC 7643) and C741 (Xeon 6740E).

Feature	EPYC 7643	Xeon 6740E
Socket	SP3	LGA4710
PCIe Generation	PCIe 4.0	PCIe 4.0
Max RAM Speed	DDR4-3200	6400+100%
Max RAM Capacity	4 TB	4096 TB+102300%
RAM Channels	8	8
ECC Support	Yes	Yes
PCIe Lanes	128+60%	80

🔧

Advanced Features

Neither processor supports overclocking. Only the Xeon 6740E supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (EPYC 7643) vs VT-x, VT-d, TDX (Xeon 6740E). Primary use case: EPYC 7643 targets Server. Direct competitor: EPYC 7643 rivals EPYC 7443P; Xeon 6740E rivals EPYC 9005.

Feature	EPYC 7643	Xeon 6740E
Integrated GPU	No	No
IGPU Model	None	None
Unlocked	No	No
AVX-512	No	Yes
Virtualization	AMD-V	VT-x, VT-d, TDX
Target Use	Server	—

💰

Value Analysis

At launch, the EPYC 7643 was priced at $4995, while the Xeon 6740E came in at $5265. On launch pricing ($4995 vs $5265), EPYC 7643 was $270 cheaper. In terms of value on MSRP (PassMark points per dollar), the EPYC 7643 delivers 15.2 pts/$ vs 14.5 pts/$ for the Xeon 6740E — making the EPYC 7643 the 5.1% better value option.

Feature	EPYC 7643	Xeon 6740E
MSRP	$4995-5%	$5265
Performance per Dollar	15.2+5%	14.5
Release Date	2021	2024

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