Core i5-655K vs Phenom II X4 805

Core i5-655K vs Phenom II X4 805 Performance Spectrum

Core i5-655K

2 / 4

2,017

+0.8%

2,001

0.0%

Ryzen Threadripper PRO 7955WX

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.

Core i5-655K vs Phenom II X4 805 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.

Core i5-655K vs Phenom II X4 805: Pros, Cons & Final Verdict

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

Core i5-655K

2010

Why buy it

✅Draws 73W instead of 95W, a 22W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel HD Graphics (Westmere), while Phenom II X4 805 needs a discrete GPU.

Trade-offs

❌Launch MSRP is still $216 MSRP, while Phenom II X4 805 mostly shows up through inconsistent older-market listings.

Phenom II X4 805

2009

Why buy it

Trade-offs

❌Lower PassMark (2,001 vs 2,017).
❌30.1% higher power demand at 95W vs 73W.
❌No integrated graphics, while Core i5-655K can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i5-655K better than Phenom II X4 805?

Yes. Core i5-655K is the better all-around CPU here. It gives you a 0.7% average FPS lead across 36 shared CPU game tests in our data, 0.8% 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, Core i5-655K is the better pick. According to our tests, it delivers 0.7% more average FPS across 36 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Core i5-655K is the stronger fit. You are getting 0.8% better PassMark, backed by 2 cores and 4 threads.

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

Core i5-655K is the better buy right now. Core i5-655K comes in at an unclear MSRP at $216 MSRP versus unclear MSRP, and it still gives you a 0.7% average FPS lead across 36 shared CPU game tests in our data. It is also 100.0% better value on MSRP (9.3 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core i5-655K makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2010 vs 2009) 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.

Core i5-655K vs Phenom II X4 805 Technical Specifications

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

Core i5-655K

The Core i5-655K is manufactured by Intel. It was released in 30 May 2010 (15 years ago). It is based on the Clarkdale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 3.2 GHz, with boost up to 3.46 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1156. Thermal design power (TDP): 73 Watt. Memory support: DDR3. Passmark benchmark score: 2,017 points. Launch price was $69.

Phenom II X4 805

The Phenom II X4 805 is manufactured by AMD. It was released in 9 February 2009 (16 years ago). It is based on the Deneb (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 2.5 GHz, with boost up to 2.5 GHz. L3 cache: 4 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 2,001 points. Launch price was $174.

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Processing Power

The Core i5-655K packs 2 cores / 4 threads, while the Phenom II X4 805 offers 4 cores / 4 threads — the Phenom II X4 805 has 2 more cores. Boost clocks reach 3.46 GHz on the Core i5-655K versus 2.5 GHz on the Phenom II X4 805 — a 32.2% clock advantage for the Core i5-655K (base: 3.2 GHz vs 2.5 GHz). The Core i5-655K uses the Clarkdale (2010−2011) architecture (32 nm), while the Phenom II X4 805 uses Deneb (2009−2011) (45 nm). In PassMark, the Core i5-655K scores 2,017 against the Phenom II X4 805's 2,001 — a 0.8% lead for the Core i5-655K. Both processors carry 4 MB (total) of L3 cache.

Feature	Core i5-655K	Phenom II X4 805
Cores / Threads	2 / 4	4 / 4+100%
Boost Clock	3.46 GHz+38%	2.5 GHz
Base Clock	3.2 GHz+28%	2.5 GHz
L3 Cache	4 MB (total)	4 MB (total)
L2 Cache	256 kB (per core)	512 kB (per core)+100%
Process	32 nm-29%	45 nm
Architecture	Clarkdale (2010−2011)	Deneb (2009−2011)
PassMark	2,017	2,001
Geekbench 6 Single	560	—
Geekbench 6 Multi	1,250	—

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Memory & Platform

The Core i5-655K uses the LGA1156 socket (PCIe 2.0), while the Phenom II X4 805 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Core i5-655K	Phenom II X4 805
Socket	LGA1156	AM3
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	DDR3-1333	—
Max RAM Capacity	16 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: VT-x (Core i5-655K) / not specified (Phenom II X4 805). The Core i5-655K includes integrated graphics (Intel HD Graphics (Westmere)), while the Phenom II X4 805 requires a dedicated GPU. Primary use case: Core i5-655K targets Desktop.