Athlon PRO 3045B vs Ryzen 9 5900X

CPU

GPU

Athlon PRO 3045B

2 Cores4 Thrd15 WWMax: 3.2 GHz2021

Similar parts

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Ryzen 9 5900X

12 Cores24 Thrd105 WWMax: 4.8 GHz2020

Ryzen family

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Athlon PRO 3045B vs Ryzen 9 5900X Performance Spectrum

Athlon PRO 3045B

2 / 4

2,770

0.0%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Ryzen 9 5900X

12 / 24

38,955

+1306.3%

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.

Athlon PRO 3045B vs Ryzen 9 5900X 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.

Athlon PRO 3045B vs Ryzen 9 5900X: Pros, Cons & Final Verdict

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

Athlon PRO 3045B

2021

Why buy it

✅Costs $123 less on MSRP ($426 MSRP vs $549 MSRP).
✅Draws 15W instead of 105W, a 90W reduction.
✅Integrated graphics onboard with AMD Radeon Vega 3, while Ryzen 9 5900X needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.
❌Lower PassMark (2,770 vs 38,955).
❌Smaller total L3 cache (4 MB vs 64 MB).
❌Lower PassMark per dollar, at 6.5 vs 71.0 PassMark/$ ($426 MSRP vs $549 MSRP).

Ryzen 9 5900X

2020

Why buy it

✅Better for gaming: +355.0% higher average FPS across 50 shared CPU benchmark tests.
✅+1500% larger total L3 cache (64 MB vs 4 MB).
✅Delivers 991.2% more PassMark for each dollar spent, at 71.0 vs 6.5 PassMark/$ ($549 MSRP vs $426 MSRP).
✅200% more PCIe lanes (24 vs 8) for storage and expansion-heavy builds.

Trade-offs

❌
28.9% HIGHER MSRP
$549 MSRPvs$426 MSRP
❌600% higher power demand at 105W vs 15W.
❌No integrated graphics, while Athlon PRO 3045B can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Ryzen 9 5900X better than Athlon PRO 3045B?

Yes. Ryzen 9 5900X is the better all-around CPU here. It gives you a 355.0% average FPS lead across 50 shared CPU game tests in our data and 1306.3% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Ryzen 9 5900X is the better pick. According to our tests, it delivers 355.0% 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 9 5900X is the stronger fit. You are getting 1306.3% better PassMark, backed by 12 cores and 24 threads. It also has the larger cache pool with 1500% larger total L3 cache (64 MB vs 4 MB).

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

Ryzen 9 5900X is the better buy right now. Ryzen 9 5900X comes in 28.9% more expensive on MSRP at $549 MSRP versus $426 MSRP, and it still gives you a 355.0% average FPS lead across 50 shared CPU game tests in our data. It is also 991.2% better value on MSRP (71.0 vs 6.5 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Athlon PRO 3045B makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2021 vs 2020). That makes it the safer long-term bet.

Athlon PRO 3045B vs Ryzen 9 5900X Technical Specifications

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

Athlon PRO 3045B

The Athlon PRO 3045B is manufactured by AMD. It was released in 2009-01-01. It is based on the Dali (2020−2021) architecture. It features 2 cores and 4 threads. Base frequency is 2.3 GHz, with boost up to 3.2 GHz. L3 cache: 4 MB (total). L2 cache: 512 kB (per core). Built on 14 nm process technology. Socket: FP5. Thermal design power (TDP): 15 Watt. Memory support: DDR4. Passmark benchmark score: 2,770 points. Launch price was $149.

Ryzen 9 5900X

The Ryzen 9 5900X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen3) (2020−2022) architecture. It features 12 cores and 24 threads. Base frequency is 3.7 GHz, with boost up to 4.8 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4-3200. Passmark benchmark score: 38,955 points. Launch price was $549.

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Processing Power

The Athlon PRO 3045B packs 2 cores / 4 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 10 more cores. Boost clocks reach 3.2 GHz on the Athlon PRO 3045B versus 4.8 GHz on the Ryzen 9 5900X — a 40% clock advantage for the Ryzen 9 5900X (base: 2.3 GHz vs 3.7 GHz). The Athlon PRO 3045B uses the Dali (2020−2021) architecture (14 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Athlon PRO 3045B scores 2,770 against the Ryzen 9 5900X's 38,955 — a 173.4% lead for the Ryzen 9 5900X. L3 cache: 4 MB (total) on the Athlon PRO 3045B vs 64 MB on the Ryzen 9 5900X.

Feature	Athlon PRO 3045B	Ryzen 9 5900X
Cores / Threads	2 / 4	12 / 24+500%
Boost Clock	3.2 GHz	4.8 GHz+50%
Base Clock	2.3 GHz	3.7 GHz+61%
L3 Cache	4 MB (total)	64 MB+1500%
L2 Cache	512 kB (per core)	512K (per core)
Process	14 nm	7 nm, 12 nm-50%
Architecture	Dali (2020−2021)	Vermeer (Zen3) (2020−2022)
PassMark	2,770	38,955+1306%
Cinebench R23 Multi	—	21,000
Geekbench 6 Single	—	2,174
Geekbench 6 Multi	—	11,888

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Memory & Platform

The Athlon PRO 3045B uses the FP5 socket (PCIe 4.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2400 on the Athlon PRO 3045B versus DDR4-3200 on the Ryzen 9 5900X — the Ryzen 9 5900X supports 33.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 5900X supports up to 128 GB of RAM compared to 32 GB — 300% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 8 (Athlon PRO 3045B) vs 24 (Ryzen 9 5900X) — the Ryzen 9 5900X offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD FP5 (Athlon PRO 3045B) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).

Feature	Athlon PRO 3045B	Ryzen 9 5900X
Socket	FP5	AM4
PCIe Generation	PCIe 4.0	PCIe 4.0
Max RAM Speed	DDR4-2400	DDR4-3200+33%
Max RAM Capacity	32 GB	128 GB+300%
RAM Channels	2	2
ECC Support	Yes	Yes
PCIe Lanes	8	24+200%

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Advanced Features

Virtualization: not specified (Athlon PRO 3045B) / AMD-V (Ryzen 9 5900X). The Athlon PRO 3045B includes integrated graphics (AMD Radeon Vega 3), while the Ryzen 9 5900X requires a dedicated GPU. Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K.

Feature	Athlon PRO 3045B	Ryzen 9 5900X
Integrated GPU	Yes	No
IGPU Model	AMD Radeon Vega 3	—
Unlocked	—	Yes
AVX-512	—	No
Virtualization	—	AMD-V
Target Use	—	Workstation

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Value Analysis

At launch, the Athlon PRO 3045B was priced at $426, while the Ryzen 9 5900X came in at $549. On launch pricing ($426 vs $549), Athlon PRO 3045B was $123 cheaper. In terms of value on MSRP (PassMark points per dollar), the Athlon PRO 3045B delivers 6.5 pts/$ vs 71.0 pts/$ for the Ryzen 9 5900X — making the Ryzen 9 5900X the 166.4% better value option.

Feature	Athlon PRO 3045B	Ryzen 9 5900X
MSRP	$426-22%	$549
Performance per Dollar	6.5	71.0+992%
Release Date	2021	2020

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