Athlon PRO 300GE vs Core i3-8121U

Athlon PRO 300GE vs Core i3-8121U Performance Spectrum

Athlon PRO 300GE

2 / 4

4,342

+1.7%

Ryzen Threadripper PRO 7965WX

Core i3-8121U

2 / 4

4,271

0.0%

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 300GE vs Core i3-8121U 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 300GE vs Core i3-8121U: 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 300GE

2019

Why buy it

✅Integrated graphics onboard with Radeon Vega 3, while Core i3-8121U needs a discrete GPU.

Trade-offs

❌Launch MSRP is still $50 MSRP, while Core i3-8121U mostly shows up through inconsistent older-market listings.
❌133.3% higher power demand at 35W vs 15W.

Core i3-8121U

2018

Why buy it

✅Draws 15W instead of 35W, a 20W reduction.
✅100% more PCIe lanes (16 vs 8) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (4,271 vs 4,342).
❌No integrated graphics, while Athlon PRO 300GE can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Athlon PRO 300GE better than Core i3-8121U?

Yes. Athlon PRO 300GE is the better all-around CPU here. It gives you a 0.6% average FPS lead across 50 shared CPU game tests in our data, 1.7% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Athlon PRO 300GE is the better pick. According to our tests, it delivers 0.6% 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, Athlon PRO 300GE is the stronger fit. You are getting 1.7% better PassMark, backed by 2 cores and 4 threads.

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

Athlon PRO 300GE is the better buy right now. Athlon PRO 300GE comes in at an unclear MSRP at $50 MSRP versus unclear MSRP, and it still gives you a 0.6% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (86.8 vs 0.0 PassMark/$), 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 300GE makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2018) and more multi-core headroom with 2 cores / 4 threads instead of 2/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Athlon PRO 300GE vs Core i3-8121U Technical Specifications

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

Athlon PRO 300GE

The Athlon PRO 300GE is manufactured by AMD. It was released in 2009-01-01. It is based on the Zen+ (2018−2019) architecture. It features 2 cores and 4 threads. Max frequency: 3.4 GHz. L3 cache: 4 MB. L2 cache: 1 MB. Built on 12 nm process technology. Socket: AM4. Thermal design power (TDP): 35 Watt. Memory support: DDR4-2666. Passmark benchmark score: 4,342 points. Launch price was $149.

Core i3-8121U

The Core i3-8121U is manufactured by Intel. It was released in 5 May 2018 (7 years ago). It is based on the Coffee Lake-U (2018−2019) architecture. It features 2 cores and 4 threads. Base frequency is 2.2 GHz, with boost up to 3.2 GHz. L3 cache: 4 MB (total). L2 cache: 256K (per core). Built on 10 nm process technology. Socket: BGA1440. Thermal design power (TDP): 15 Watt. Memory support: DDR4. Passmark benchmark score: 4,271 points. Launch price was $69.

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Processing Power

Both the Athlon PRO 300GE and Core i3-8121U share an identical 2-core/4-thread configuration. Boost clocks reach 3.4 GHz on the Athlon PRO 300GE versus 3.2 GHz on the Core i3-8121U — a 6.1% clock advantage for the Athlon PRO 300GE. The Athlon PRO 300GE uses the Zen+ (2018−2019) architecture (12 nm), while the Core i3-8121U uses Coffee Lake-U (2018−2019) (10 nm). In PassMark, the Athlon PRO 300GE scores 4,342 against the Core i3-8121U's 4,271 — a 1.6% lead for the Athlon PRO 300GE. L3 cache: 4 MB on the Athlon PRO 300GE vs 4 MB (total) on the Core i3-8121U.

Feature	Athlon PRO 300GE	Core i3-8121U
Cores / Threads	2 / 4	2 / 4
Boost Clock	3.4 GHz+6%	3.2 GHz
Base Clock	—	2.2 GHz
L3 Cache	4 MB	4 MB (total)
L2 Cache	1 MB	256K (per core)+25500%
Process	12 nm	10 nm-17%
Architecture	Zen+ (2018−2019)	Coffee Lake-U (2018−2019)
PassMark	4,342+2%	4,271
Geekbench 6 Single	—	1,178
Geekbench 6 Multi	—	2,250

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Memory & Platform

The Athlon PRO 300GE uses the AM4 socket (PCIe 3.0), while the Core i3-8121U uses BGA1440 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Athlon PRO 300GE versus DDR4-2400 on the Core i3-8121U — the Athlon PRO 300GE supports 11.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Athlon PRO 300GE supports up to 64 GB of RAM compared to 32 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 8 (Athlon PRO 300GE) vs 16 (Core i3-8121U) — the Core i3-8121U offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD AM4 (Athlon PRO 300GE) and SoC (Core i3-8121U).

Feature	Athlon PRO 300GE	Core i3-8121U
Socket	AM4	BGA1440
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2666+11%	DDR4-2400
Max RAM Capacity	64 GB+100%	32 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	8	16+100%

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Advanced Features

Neither processor supports overclocking. Only the Core i3-8121U supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (Athlon PRO 300GE) vs VT-x, VT-d, EPT (Core i3-8121U). The Athlon PRO 300GE includes integrated graphics (Radeon Vega 3), while the Core i3-8121U requires a dedicated GPU. Primary use case: Athlon PRO 300GE targets Desktop, Core i3-8121U targets Productivity. Direct competitor: Core i3-8121U rivals Core i3-8130U.