A6-6420K vs Pentium G870

A6-6420K vs Pentium G870 Performance Spectrum

A6-6420K

2 / 2

1,571

+0.6%

Ryzen Threadripper PRO 5945WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Pentium G870

2 / 2

1,562

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.

A6-6420K vs Pentium G870 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.

A6-6420K vs Pentium G870: Pros, Cons & Final Verdict

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

A6-6420K

2014

Why buy it

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Radeon HD 8470D, while Pentium G870 needs a discrete GPU.
✅Includes a boxed cooler (true), unlike Pentium G870.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Pentium G870

2012

Why buy it

Trade-offs

❌Lower PassMark (1,562 vs 1,571).
❌Launch MSRP is still $86 MSRP, while A6-6420K mostly shows up through inconsistent older-market listings.
❌No integrated graphics, while A6-6420K can still boot and troubleshoot without a discrete GPU.
❌No boxed cooler included, unlike A6-6420K.

Quick Answers

So, is A6-6420K better than Pentium G870?

Yes. A6-6420K is the better all-around CPU here. It gives you a 2.9% average FPS lead across 50 shared CPU game tests in our data, 0.6% 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, A6-6420K is the better pick. According to our tests, it delivers 2.9% 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, A6-6420K is the stronger fit. You are getting 0.6% better PassMark, backed by 2 cores and 2 threads.

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

A6-6420K is still the much better call for a fresh build. A6-6420K comes in at an unclear MSRP at unclear MSRP versus $86 MSRP, and it still gives you a 2.9% average FPS lead across 50 shared CPU game tests in our data. Pentium G870 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2012 platform. Even with 100.0% better value on paper (18.2 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA1155.

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

A6-6420K makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2014 vs 2012) and more multi-core headroom with 2 cores / 2 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

A6-6420K vs Pentium G870 Technical Specifications

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

A6-6420K

The A6-6420K is manufactured by AMD. It was released in 2014-01-01. It is based on the Richland (2013−2014) architecture. It features 2 cores and 2 threads. Base frequency is 4 GHz, with boost up to 4.2 GHz. L2 cache: 1024 kB. Built on 32 nm process technology. Socket: FM2. Thermal design power (TDP): 65 Watt. Memory support: DDR3-1866. Passmark benchmark score: 1,571 points. Launch price was $70.

Pentium G870

The Pentium G870 is manufactured by Intel. It was released in 3 June 2012 (13 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 2 threads. Base frequency is 3.1 GHz, with boost up to 3.1 GHz. L3 cache: 3 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1155. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 1,562 points. Launch price was $97.

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Processing Power

Both the A6-6420K and Pentium G870 share an identical 2-core/2-thread configuration. Boost clocks reach 4.2 GHz on the A6-6420K versus 3.1 GHz on the Pentium G870 — a 30.1% clock advantage for the A6-6420K (base: 4 GHz vs 3.1 GHz). The A6-6420K uses the Richland (2013−2014) architecture (32 nm), while the Pentium G870 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the A6-6420K scores 1,571 against the Pentium G870's 1,562 — a 0.6% lead for the A6-6420K.

Feature	A6-6420K	Pentium G870
Cores / Threads	2 / 2	2 / 2
Boost Clock	4.2 GHz+35%	3.1 GHz
Base Clock	4 GHz+29%	3.1 GHz
L3 Cache	—	3 MB (total)
L2 Cache	1024 kB+300%	256 kB (per core)
Process	32 nm	32 nm
Architecture	Richland (2013−2014)	Sandy Bridge (2011−2013)
PassMark	1,571	1,562

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Memory & Platform

The A6-6420K uses the FM2 socket (PCIe 3.0), while the Pentium G870 uses LGA1155 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	A6-6420K	Pentium G870
Socket	FM2	LGA1155
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	1866	—
Max RAM Capacity	32	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

🔧

Advanced Features

Virtualization: true (A6-6420K) / not specified (Pentium G870). The A6-6420K includes integrated graphics (Radeon HD 8470D), while the Pentium G870 requires a dedicated GPU. Direct competitor: A6-6420K rivals Pentium G3258.