EPYC 7643 vs Xeon 6740E

CPU

GPU

EPYC 7643

48 Cores96 Thrd225 WWMax: 3.6 GHz2021

Popular choices:

•••••••••

Xeon 6740E

96 Cores96 Thrd250 WWMax: 3.2 GHz2024

Popular choices:

•••••••••

Performance Spectrum - CPU

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.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, productivity performance, platform differences, power efficiency, pricing context, and upgrade path so you can see which CPU actually makes more sense.

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

❌Worse for gaming: lower average FPS than Xeon 6740E across 4 shared CPU benchmark tests.
❌Lower PassMark (76,050 vs 76,167).
❌Older platform position on SP3 with DDR4, while Xeon 6740E moves to LGA4710 and DDR5.

Xeon 6740E

2024

Why buy it

✅Better for gaming: +4.5% higher average FPS across 4 shared CPU benchmark tests.
✅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

EPYC 7643

2021

Xeon 6740E

2024

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.

Why buy it

✅Better for gaming: +4.5% higher average FPS across 4 shared CPU benchmark tests.
✅Newer platform on LGA4710 with DDR5 support instead of SP3 and DDR4.
✅AVX-512 support for select workstation, AI, and scientific workloads.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon 6740E across 4 shared CPU benchmark tests.
❌Lower PassMark (76,050 vs 76,167).
❌Older platform position on SP3 with DDR4, while Xeon 6740E moves to LGA4710 and DDR5.

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 Xeon 6740E better than EPYC 7643?

Yes. Xeon 6740E is the better overall CPU here. You are getting a 4.5% average FPS lead across 4 shared CPU game tests in our data, 0.2% better PassMark, and the stronger long-term platform, which makes it the stronger all-around choice.

Which one is better for gaming?

If gaming is the priority, Xeon 6740E is the better pick here. According to our tests, it delivers 4.5% more average FPS across 4 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Xeon 6740E is the better 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?

Xeon 6740E is still the faster CPU overall, but EPYC 7643 makes more sense if price matters more than absolute performance. Xeon 6740E is 5.4% more expensive on MSRP at $5,265 MSRP versus $4,995 MSRP, and it gives you a 4.5% average FPS lead across 4 shared CPU game tests in our data. EPYC 7643 is also 5.2% better value on MSRP (15.2 vs 14.5 PassMark/$), which is why it is easier to justify for price-conscious builds on paper.

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

Xeon 6740E is the more future-proof choice 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 should give you a better long-term upgrade path for motherboard, RAM, and future CPU swaps.

Games Benchmarks

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

EPYC 7643 Benchmark Check

Xeon 6740E Benchmark Check

Path of Exile 2

Preset	EPYC 7643	Xeon 6740E
1080p
low	195 FPS	189 FPS
medium	159 FPS	152 FPS
high	129 FPS	121 FPS
ultra	100 FPS	95 FPS
1440p
low	160 FPS	153 FPS
medium	125 FPS	119 FPS
high	97 FPS	91 FPS
ultra	77 FPS	73 FPS
4K
low	72 FPS	71 FPS
medium	60 FPS	59 FPS
high	47 FPS	46 FPS
ultra	39 FPS	38 FPS

Open EPYC 7643 Open Xeon 6740E

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	EPYC 7643	Xeon 6740E
1080p
low	418 FPS	437 FPS
medium	367 FPS	378 FPS
high	299 FPS	306 FPS
ultra	234 FPS	241 FPS
1440p
low	344 FPS	359 FPS
medium	310 FPS	319 FPS
high	259 FPS	266 FPS
ultra	197 FPS	203 FPS
4K
low	211 FPS	222 FPS
medium	194 FPS	201 FPS
high	163 FPS	168 FPS
ultra	131 FPS	135 FPS

Open EPYC 7643 Open Xeon 6740E

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	EPYC 7643	Xeon 6740E
1080p
low	837 FPS	934 FPS
medium	698 FPS	831 FPS
high	650 FPS	779 FPS
ultra	574 FPS	693 FPS
1440p
low	602 FPS	746 FPS
medium	500 FPS	655 FPS
high	458 FPS	614 FPS
ultra	401 FPS	546 FPS
4K
low	430 FPS	479 FPS
medium	336 FPS	378 FPS
high	300 FPS	334 FPS
ultra	243 FPS	272 FPS

Open EPYC 7643 Open Xeon 6740E

League of Legends

League of Legends

Valorant

Preset	EPYC 7643	Xeon 6740E
1080p
low	977 FPS	918 FPS
medium	887 FPS	830 FPS
high	764 FPS	715 FPS
ultra	660 FPS	610 FPS
1440p
low	752 FPS	710 FPS
medium	656 FPS	620 FPS
high	561 FPS	530 FPS
ultra	482 FPS	450 FPS
4K
low	540 FPS	509 FPS
medium	481 FPS	455 FPS
high	422 FPS	400 FPS
ultra	364 FPS	344 FPS

Open EPYC 7643 Open Xeon 6740E

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of EPYC 7643 and Xeon 6740E

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.

⚡

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	—

🧠

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 199.8% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon 6740E supports up to 4096 of RAM compared to 4 TB — 199.6% 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+159900%
Max RAM Capacity	4 TB+104857500%	4096
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

The EPYC 7643 launched at $4995 MSRP, while the Xeon 6740E debuted at $5265. On MSRP ($4995 vs $5265), the EPYC 7643 is $270 cheaper. In terms of value on MSRP (PassMark points per dollar), the EPYC 7643 delivers 15.2 pts/$ vs 14.5 pts/$ for the Xeon 6740E — making the EPYC 7643 the 5.1% better value option.