Athlon II X4 651 vs Pentium Gold G6400T

Athlon II X4 651 vs Pentium Gold G6400T Performance Spectrum

Athlon II X4 651

4 / 4

3,584

+1.1%

Ryzen Threadripper 3990X

Pentium Gold G6400T

2 / 4

3,544

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 II X4 651 vs Pentium Gold G6400T 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 II X4 651 vs Pentium Gold G6400T: Pros, Cons & Final Verdict

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

Athlon II X4 651

2011

Why buy it

✅Better for gaming: +3.1% higher average FPS across 50 shared CPU benchmark tests.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $92 MSRP, while Pentium Gold G6400T mostly shows up through inconsistent older-market listings.
❌185.7% higher power demand at 100W vs 35W.

Pentium Gold G6400T

2020

Why buy it

✅Draws 35W instead of 100W, a 65W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Athlon II X4 651 across 50 shared CPU benchmark tests.
❌Lower PassMark (3,544 vs 3,584).

Quick Answers

So, is Athlon II X4 651 better than Pentium Gold G6400T?

Yes. Athlon II X4 651 is the better all-around CPU here. It gives you a 3.1% average FPS lead across 50 shared CPU game tests in our data and 1.1% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Athlon II X4 651 is the better pick. According to our tests, it delivers 3.1% 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 II X4 651 is the stronger fit. You are getting 1.1% better PassMark, backed by 4 cores and 4 threads.

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

Athlon II X4 651 is the better buy right now. Athlon II X4 651 comes in at an unclear MSRP at $92 MSRP versus unclear MSRP, and it still gives you a 3.1% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (39.0 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper. That said, if you already own a compatible LGA1200 + DDR4 setup, Pentium Gold G6400T can still make sense as a platform-matched option because it avoids a motherboard and RAM swap.

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

Pentium Gold G6400T makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2011). That makes it the safer long-term bet.

Athlon II X4 651 vs Pentium Gold G6400T Technical Specifications

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

Athlon II X4 651

The Athlon II X4 651 is manufactured by AMD. It was released in 2009-01-01. It is based on the Llano (2011−2012) architecture. It features 4 cores and 4 threads. Base frequency is 3 GHz, with boost up to 3 GHz. L3 cache: 0 kB. L2 cache: 1 MB (per core). Built on 32 nm process technology. Socket: FM1. Thermal design power (TDP): 100 Watt. Memory support: DDR3. Passmark benchmark score: 3,584 points. Launch price was $149.

Pentium Gold G6400T

The Pentium Gold G6400T is manufactured by Intel. It was released in 2007-01-01. It features 2 cores and 4 threads. Base frequency: 3.4 GHz. L3 cache: 4 MB Intel® Smart Cache. Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 35 Watt. Memory support: DDR4-2666. Passmark benchmark score: 3,544 points. Launch price was $69.

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Processing Power

The Athlon II X4 651 packs 4 cores / 4 threads, while the Pentium Gold G6400T offers 2 cores / 4 threads — the Athlon II X4 651 has 2 more cores. The Athlon II X4 651 is built on the Llano (2011−2012) architecture. In PassMark, the Athlon II X4 651 scores 3,584 against the Pentium Gold G6400T's 3,544 — a 1.1% lead for the Athlon II X4 651. L3 cache: 0 kB on the Athlon II X4 651 vs 4 MB Intel® Smart Cache on the Pentium Gold G6400T.

Feature	Athlon II X4 651	Pentium Gold G6400T
Cores / Threads	4 / 4+100%	2 / 4
Boost Clock	3 GHz	—
Base Clock	3 GHz	3.4 GHz+13%
L3 Cache	0 kB	4 MB Intel® Smart Cache
L2 Cache	1 MB (per core)	—
Process	32 nm	14 nm-56%
Architecture	Llano (2011−2012)	—
PassMark	3,584+1%	3,544

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Memory & Platform

The Athlon II X4 651 uses the FM1 socket (PCIe 2.0), while the Pentium Gold G6400T uses LGA1200 (PCIe 3.0) — making them incompatible on the same motherboard.