Athlon PRO 300U vs FX-8100

Athlon PRO 300U vs FX-8100 Performance Spectrum

Athlon PRO 300U

2 / 4

4,080

0.0%

Ryzen Threadripper 3990X

FX-8100

8 / 8

4,095

+0.4%

Ryzen Threadripper 3990X

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 300U vs FX-8100 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 300U vs FX-8100: 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 300U

2019

Why buy it

✅Draws 15W instead of 95W, a 80W reduction.
✅100+% more PCIe lanes (8 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with AMD Radeon Vega 3, while FX-8100 needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than FX-8100 across 50 shared CPU benchmark tests.
❌Lower PassMark (4,080 vs 4,095).
❌Smaller total L3 cache (4 MB vs 8 MB).

FX-8100

2011

Why buy it

✅Better for gaming: +11.0% higher average FPS across 50 shared CPU benchmark tests.
✅+100% larger total L3 cache (8 MB vs 4 MB).

Trade-offs

❌Launch MSRP is still $300 MSRP, while Athlon PRO 300U mostly shows up through inconsistent older-market listings.
❌533.3% higher power demand at 95W vs 15W.
❌No integrated graphics, while Athlon PRO 300U can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is FX-8100 better than Athlon PRO 300U?

Yes. FX-8100 is the better all-around CPU here. It gives you a 11.0% average FPS lead across 50 shared CPU game tests in our data and 0.4% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, FX-8100 is the better pick. According to our tests, it delivers 11.0% 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, FX-8100 is the stronger fit. You are getting 0.4% better PassMark, backed by 8 cores and 8 threads. It also has the larger cache pool with 100% larger total L3 cache (8 MB vs 4 MB).

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

FX-8100 is the better buy right now. FX-8100 comes in at an unclear MSRP at $300 MSRP versus unclear MSRP, and it still gives you a 11.0% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (13.7 vs 0.0 PassMark/$), 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 300U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2011). That makes it the safer long-term bet.

Athlon PRO 300U vs FX-8100 Technical Specifications

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

Athlon PRO 300U

The Athlon PRO 300U is manufactured by AMD. It was released in 2009-01-01. It is based on the Raven Ridge 2 (2019) architecture. It features 2 cores and 4 threads. Base frequency is 2.4 GHz, with boost up to 3.3 GHz. L3 cache: 4 MB (total). L2 cache: 512K (per core). Built on 14 nm process technology. Socket: FP5. Thermal design power (TDP): 15 Watt. Memory support: DDR4 Dual-channel. Passmark benchmark score: 4,080 points. Launch price was $149.

FX-8100

The FX-8100 is manufactured by AMD. It was released in 12 October 2011 (14 years ago). It is based on the Zambezi (2011−2012) architecture. It features 8 cores and 8 threads. Base frequency is 2.8 GHz, with boost up to 3.7 GHz. L3 cache: 8 MB (total). L2 cache: 8 MB. Built on 32 nm process technology. Socket: AM3+. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 4,095 points. Launch price was $69.

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Processing Power

The Athlon PRO 300U packs 2 cores / 4 threads, while the FX-8100 offers 8 cores / 8 threads — the FX-8100 has 6 more cores. Boost clocks reach 3.3 GHz on the Athlon PRO 300U versus 3.7 GHz on the FX-8100 — a 11.4% clock advantage for the FX-8100 (base: 2.4 GHz vs 2.8 GHz). The Athlon PRO 300U uses the Raven Ridge 2 (2019) architecture (14 nm), while the FX-8100 uses Zambezi (2011−2012) (32 nm). In PassMark, the Athlon PRO 300U scores 4,080 against the FX-8100's 4,095 — a 0.4% lead for the FX-8100. L3 cache: 4 MB (total) on the Athlon PRO 300U vs 8 MB (total) on the FX-8100.

Feature	Athlon PRO 300U	FX-8100
Cores / Threads	2 / 4	8 / 8+300%
Boost Clock	3.3 GHz	3.7 GHz+12%
Base Clock	2.4 GHz	2.8 GHz+17%
L3 Cache	4 MB (total)	8 MB (total)+100%
L2 Cache	512K (per core)+6300%	8 MB
Process	14 nm-56%	32 nm
Architecture	Raven Ridge 2 (2019)	Zambezi (2011−2012)
PassMark	4,080	4,095
Geekbench 6 Single	—	455
Geekbench 6 Multi	—	1,621

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Memory & Platform

The Athlon PRO 300U uses the FP5 socket (PCIe 3.0), while the FX-8100 uses AM3+ (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2400 on the Athlon PRO 300U versus DDR3-1866 on the FX-8100 — the Athlon PRO 300U supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Athlon PRO 300U supports up to 32 GB of RAM compared to 16 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 8 (Athlon PRO 300U) vs 0 (FX-8100) — the Athlon PRO 300U offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD FP5 (Athlon PRO 300U) and AMD 990FX,AMD 970 (FX-8100).

Feature	Athlon PRO 300U	FX-8100
Socket	FP5	AM3+
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR4-2400+29%	DDR3-1866
Max RAM Capacity	32 GB+100%	16 GB
RAM Channels	2	2
ECC Support	Yes	No
PCIe Lanes	8	0

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Advanced Features

Virtualization: not specified (Athlon PRO 300U) / AMD-V (FX-8100). The Athlon PRO 300U includes integrated graphics (AMD Radeon Vega 3), while the FX-8100 requires a dedicated GPU.