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.

Ryzen 5 8640U

2023

Why buy it

✅Draws 28W instead of 105W, a 77W reduction.
✅Newer platform on FP8 with DDR5 support instead of AM4 and DDR4.
✅Integrated graphics onboard with Radeon 760M, while Ryzen 7 5800X needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 5800X across 4 shared CPU benchmark tests.
❌Lower PassMark (20,274 vs 27,712).
❌Smaller total L3 cache (16 MB vs 32 MB).

Ryzen 7 5800X

2020

Why buy it

✅Better for gaming: +18.5% higher average FPS across 4 shared CPU benchmark tests.
✅+100% larger total L3 cache (32 MB vs 16 MB).
✅20% more PCIe lanes (24 vs 20) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $449 MSRP, while Ryzen 5 8640U mostly shows up through inconsistent older-market listings.
❌275% higher power demand at 105W vs 28W.
❌Older platform position on AM4 with DDR4, while Ryzen 5 8640U moves to FP8 and DDR5.
❌No integrated graphics, while Ryzen 5 8640U can still boot and troubleshoot without a discrete GPU.

Ryzen 5 8640U

2023

Ryzen 7 5800X

2020

Why buy it

✅Draws 28W instead of 105W, a 77W reduction.
✅Newer platform on FP8 with DDR5 support instead of AM4 and DDR4.
✅Integrated graphics onboard with Radeon 760M, while Ryzen 7 5800X needs a discrete GPU.

Why buy it

✅Better for gaming: +18.5% higher average FPS across 4 shared CPU benchmark tests.
✅+100% larger total L3 cache (32 MB vs 16 MB).
✅20% more PCIe lanes (24 vs 20) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 7 5800X across 4 shared CPU benchmark tests.
❌Lower PassMark (20,274 vs 27,712).
❌Smaller total L3 cache (16 MB vs 32 MB).

Trade-offs

❌Launch MSRP is still $449 MSRP, while Ryzen 5 8640U mostly shows up through inconsistent older-market listings.
❌275% higher power demand at 105W vs 28W.
❌Older platform position on AM4 with DDR4, while Ryzen 5 8640U moves to FP8 and DDR5.
❌No integrated graphics, while Ryzen 5 8640U can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Ryzen 7 5800X better than Ryzen 5 8640U?

Yes. Ryzen 7 5800X is the better overall CPU here. You are getting a 18.5% average FPS lead across 4 shared CPU game tests in our data and 36.7% better PassMark, which makes it the stronger all-around choice.

Which one is better for gaming?

If gaming is the priority, Ryzen 7 5800X is the better pick here. According to our tests, it delivers 18.5% 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, Ryzen 7 5800X is the better fit. You are getting 36.7% better PassMark, backed by 8 cores and 16 threads. It also carries the larger cache pool with 100% larger total L3 cache (32 MB vs 16 MB).

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

Ryzen 7 5800X is the smarter buy today. Ryzen 7 5800X is at an unclear MSRP at $449 MSRP versus unclear MSRP, and it gives you a 18.5% average FPS lead across 4 shared CPU game tests in our data. It is also 100.0% better value on MSRP (61.7 vs 0.0 PassMark/$), so the better CPU is not just faster, it is also the cleaner value play on paper.

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

Ryzen 5 8640U is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2020) and a healthier platform with FP8 and DDR5 instead of AM4. 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.

Ryzen 5 8640U Benchmark Check

Ryzen 7 5800X Benchmark Check

Path of Exile 2

Preset	Ryzen 5 8640U	Ryzen 7 5800X
1080p
low	261 FPS	206 FPS
medium	237 FPS	178 FPS
high	199 FPS	146 FPS
ultra	171 FPS	110 FPS
1440p
low	230 FPS	170 FPS
medium	190 FPS	142 FPS
high	155 FPS	115 FPS
ultra	137 FPS	88 FPS
4K
low	159 FPS	83 FPS
medium	133 FPS	74 FPS
high	103 FPS	59 FPS
ultra	91 FPS	46 FPS

Open Ryzen 5 8640U Open Ryzen 7 5800X

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen 5 8640U	Ryzen 7 5800X
1080p
low	371 FPS	662 FPS
medium	309 FPS	558 FPS
high	272 FPS	466 FPS
ultra	236 FPS	417 FPS
1440p
low	313 FPS	563 FPS
medium	270 FPS	493 FPS
high	244 FPS	423 FPS
ultra	207 FPS	361 FPS
4K
low	234 FPS	350 FPS
medium	206 FPS	308 FPS
high	191 FPS	288 FPS
ultra	161 FPS	250 FPS

Open Ryzen 5 8640U Open Ryzen 7 5800X

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen 5 8640U	Ryzen 7 5800X
1080p
low	507 FPS	693 FPS
medium	507 FPS	651 FPS
high	507 FPS	570 FPS
ultra	507 FPS	464 FPS
1440p
low	507 FPS	693 FPS
medium	507 FPS	573 FPS
high	507 FPS	498 FPS
ultra	443 FPS	413 FPS
4K
low	493 FPS	484 FPS
medium	435 FPS	410 FPS
high	372 FPS	363 FPS
ultra	308 FPS	302 FPS

Open Ryzen 5 8640U Open Ryzen 7 5800X

League of Legends

League of Legends

Valorant

Preset	Ryzen 5 8640U	Ryzen 7 5800X
1080p
low	507 FPS	693 FPS
medium	507 FPS	693 FPS
high	507 FPS	693 FPS
ultra	507 FPS	693 FPS
1440p
low	507 FPS	693 FPS
medium	507 FPS	693 FPS
high	507 FPS	672 FPS
ultra	507 FPS	593 FPS
4K
low	507 FPS	604 FPS
medium	501 FPS	550 FPS
high	442 FPS	495 FPS
ultra	380 FPS	436 FPS

Open Ryzen 5 8640U Open Ryzen 7 5800X

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Ryzen 5 8640U and Ryzen 7 5800X

Ryzen 5 8640U

The Ryzen 5 8640U is manufactured by AMD. It was released in 6 December 2023 (1 year ago). It is based on the Hawk Point-U (Zen 4) (2023−2025) architecture. It features 6 cores and 12 threads. Base frequency is 3.5 GHz, with boost up to 4.9 GHz. L3 cache: 16 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: FP8. Thermal design power (TDP): 28 Watt. Memory support: DDR5. Passmark benchmark score: 20,274 points. Launch price was $299.

Ryzen 7 5800X

The Ryzen 7 5800X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen 3) (2020−2022) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 4.7 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4. Passmark benchmark score: 27,712 points. Launch price was $449.

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Processing Power

The Ryzen 5 8640U packs 6 cores / 12 threads, while the Ryzen 7 5800X offers 8 cores / 16 threads — the Ryzen 7 5800X has 2 more cores. Boost clocks reach 4.9 GHz on the Ryzen 5 8640U versus 4.7 GHz on the Ryzen 7 5800X — a 4.2% clock advantage for the Ryzen 5 8640U (base: 3.5 GHz vs 3.8 GHz). The Ryzen 5 8640U uses the Hawk Point-U (Zen 4) (2023−2025) architecture (4 nm), while the Ryzen 7 5800X uses Vermeer (Zen 3) (2020−2022) (7 nm, 12 nm). In PassMark, the Ryzen 5 8640U scores 20,274 against the Ryzen 7 5800X's 27,712 — a 31% lead for the Ryzen 7 5800X. L3 cache: 16 MB (total) on the Ryzen 5 8640U vs 32 MB on the Ryzen 7 5800X.

Feature	Ryzen 5 8640U	Ryzen 7 5800X
Cores / Threads	6 / 12	8 / 16+33%
Boost Clock	4.9 GHz+4%	4.7 GHz
Base Clock	3.5 GHz	3.8 GHz+9%
L3 Cache	16 MB (total)	32 MB+100%
L2 Cache	1 MB (per core)+100%	512K (per core)
Process	4 nm-43%	7 nm, 12 nm
Architecture	Hawk Point-U (Zen 4) (2023−2025)	Vermeer (Zen 3) (2020−2022)
PassMark	20,274	27,712+37%
Cinebench R23 Multi	10,675	—
Geekbench 6 Single	2,519	—
Geekbench 6 Multi	10,308	—

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Memory & Platform

The Ryzen 5 8640U uses the FP8 socket (PCIe 4.0), while the Ryzen 7 5800X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches LPDDR5x-7500 on the Ryzen 5 8640U versus DDR4-3200 on the Ryzen 7 5800X — the Ryzen 5 8640U supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 5 8640U supports up to 256 GB of RAM compared to 128 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 20 (Ryzen 5 8640U) vs 24 (Ryzen 7 5800X) — the Ryzen 7 5800X offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SoC (Ryzen 5 8640U) and AMD 500 series,AMD 400 series,AMD 300 series (Ryzen 7 5800X).

Feature	Ryzen 5 8640U	Ryzen 7 5800X
Socket	FP8	AM4
PCIe Generation	PCIe 4.0	PCIe 4.0
Max RAM Speed	LPDDR5x-7500+25%	DDR4-3200
Max RAM Capacity	256 GB+100%	128 GB
RAM Channels	2	2
ECC Support	Yes	Yes
PCIe Lanes	20	24+20%

🔧

Advanced Features

Only the Ryzen 7 5800X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Ryzen 5 8640U supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (SVM) (Ryzen 5 8640U) vs AMD-V (Ryzen 7 5800X). The Ryzen 5 8640U includes integrated graphics (Radeon 760M), while the Ryzen 7 5800X requires a dedicated GPU. Primary use case: Ryzen 5 8640U targets Productivity, Ryzen 7 5800X targets Desktop. Direct competitor: Ryzen 5 8640U rivals Core i5-1335U.