Athlon X4 840 vs Pentium Gold G5420T

Athlon X4 840 vs Pentium Gold G5420T Performance Spectrum

Athlon X4 840

4 / 4

3,331

0.0%

Ryzen Threadripper 3990X

Pentium Gold G5420T

2 / 4

3,370

+1.2%

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.

Athlon X4 840 vs Pentium Gold G5420T 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 X4 840 vs Pentium Gold G5420T: Pros, Cons & Final Verdict

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

Athlon X4 840

2014

Why buy it

✅Better for gaming: +6.4% higher average FPS across 50 shared CPU benchmark tests.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (3,331 vs 3,370).
❌Launch MSRP is still $102 MSRP, while Pentium Gold G5420T mostly shows up through inconsistent older-market listings.
❌85.7% higher power demand at 65W vs 35W.

Pentium Gold G5420T

2019

Why buy it

✅+1.2% higher PassMark.
✅Draws 35W instead of 65W, a 30W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Athlon X4 840 across 50 shared CPU benchmark tests.

Quick Answers

So, is Pentium Gold G5420T better than Athlon X4 840?

It depends on what you want from the system. For gaming, Athlon X4 840 is ahead with a 6.4% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Pentium Gold G5420T pulls ahead with 1.2% better PassMark.

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

For streaming, content creation, and heavier multitasking, Pentium Gold G5420T is the stronger fit. You are getting 1.2% better PassMark, backed by 2 cores and 4 threads.

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

Pentium Gold G5420T is still the much better call for a fresh build. Pentium Gold G5420T comes in at an unclear MSRP at unclear MSRP versus $102 MSRP, and it still gives you 1.2% better PassMark. Athlon X4 840 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2014 platform. Even with 100.0% better value on paper (32.7 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on FM2+.

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

Pentium Gold G5420T makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2014) and more multi-core headroom with 2 cores / 4 threads instead of 4/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Athlon X4 840 vs Pentium Gold G5420T Technical Specifications

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

Athlon X4 840

The Athlon X4 840 is manufactured by AMD. It was released in 2009-01-01. It is based on the Kaveri (2014−2015) architecture. It features 4 cores and 4 threads. Base frequency is 3.1 GHz, with boost up to 3.8 GHz. L2 cache: 4 MB. Built on 28 nm process technology. Socket: FM2+. Thermal design power (TDP): 65 watt. Memory support: DDR3. Passmark benchmark score: 3,331 points. Launch price was $149.

Pentium Gold G5420T

The Pentium Gold G5420T is manufactured by Intel. It was released in 23 April 2019 (6 years ago). It is based on the Coffee Lake (2017−2019) architecture. It features 2 cores and 4 threads. Base frequency is 3.2 GHz, with boost up to 3.2 GHz. L3 cache: 4 MB. L2 cache: 512 kB. Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 35 Watt. Memory support: DDR4-2400. Passmark benchmark score: 3,370 points. Launch price was $64.

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Processing Power

The Athlon X4 840 packs 4 cores / 4 threads, while the Pentium Gold G5420T offers 2 cores / 4 threads — the Athlon X4 840 has 2 more cores. Boost clocks reach 3.8 GHz on the Athlon X4 840 versus 3.2 GHz on the Pentium Gold G5420T — a 17.1% clock advantage for the Athlon X4 840 (base: 3.1 GHz vs 3.2 GHz). The Athlon X4 840 uses the Kaveri (2014−2015) architecture (28 nm), while the Pentium Gold G5420T uses Coffee Lake (2017−2019) (14 nm). In PassMark, the Athlon X4 840 scores 3,331 against the Pentium Gold G5420T's 3,370 — a 1.2% lead for the Pentium Gold G5420T.

Feature	Athlon X4 840	Pentium Gold G5420T
Cores / Threads	4 / 4+100%	2 / 4
Boost Clock	3.8 GHz+19%	3.2 GHz
Base Clock	3.1 GHz	3.2 GHz+3%
L3 Cache	—	4 MB
L2 Cache	4 MB+700%	512 kB
Process	28 nm	14 nm-50%
Architecture	Kaveri (2014−2015)	Coffee Lake (2017−2019)
PassMark	3,331	3,370+1%

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Memory & Platform

The Athlon X4 840 uses the FM2+ socket (PCIe 3.0), while the Pentium Gold G5420T uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard.