Core 2 Extreme X7800 vs Phenom II X2 550

Core 2 Extreme X7800 vs Phenom II X2 550 Performance Spectrum

Core 2 Extreme X7800

2 / 2

1,138

0.0%

1,142

+0.4%

Mobile Athlon 64 3700+

Ryzen Threadripper PRO 3955WX

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 2 Extreme X7800 vs Phenom II X2 550 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 2 Extreme X7800 vs Phenom II X2 550: Pros, Cons & Final Verdict

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

Core 2 Extreme X7800

2007

Why buy it

✅Draws 4W instead of 80W, a 76W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Phenom II X2 550 across 50 shared CPU benchmark tests.
❌Lower PassMark (1,138 vs 1,142).
❌Smaller total L3 cache (4 MB vs 6 MB).

Phenom II X2 550

2009

Why buy it

✅Better for gaming: +3.5% higher average FPS across 50 shared CPU benchmark tests.
✅+50% larger total L3 cache (6 MB vs 4 MB).

Trade-offs

❌1900% higher power demand at 80W vs 4W.

Quick Answers

So, is Phenom II X2 550 better than Core 2 Extreme X7800?

Yes. Phenom II X2 550 is the better all-around CPU here. It gives you a 3.5% average FPS lead across 50 shared CPU game tests in our data, 0.4% 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, Phenom II X2 550 is the better pick. According to our tests, it delivers 3.5% 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, Phenom II X2 550 is the stronger fit. You are getting 0.4% better PassMark, backed by 2 cores and 2 threads. It also has the larger cache pool with 50% larger total L3 cache (6 MB vs 4 MB).

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

Phenom II X2 550 still makes the most sense overall. Phenom II X2 550 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 3.5% average FPS lead across 50 shared CPU game tests in our data.

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

Phenom II X2 550 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2007), 50% larger total L3 cache (6 MB vs 4 MB), 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.

Core 2 Extreme X7800 vs Phenom II X2 550 Technical Specifications

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

Core 2 Extreme X7800

The Core 2 Extreme X7800 is manufactured by Intel. It was released in 17 July 2007 (18 years ago). It is based on the Merom XE (2007) architecture. It features 2 cores and 2 threads. Base frequency is 2.6 GHz, with boost up to 2.6 GHz. L3 cache: 4 MB L2 Cache. L2 cache: 4 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 44 Watt. Passmark benchmark score: 1,138 points. Launch price was $851.

Phenom II X2 550

The Phenom II X2 550 is manufactured by AMD. It was released in 4 November 2009 (16 years ago). It is based on the Callisto (2009−2010) architecture. It features 2 cores and 2 threads. Base frequency is 3.1 GHz, with boost up to 3.1 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 1,142 points. Launch price was $133.

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Processing Power

Both the Core 2 Extreme X7800 and Phenom II X2 550 share an identical 2-core/2-thread configuration. Boost clocks reach 2.6 GHz on the Core 2 Extreme X7800 versus 3.1 GHz on the Phenom II X2 550 — a 17.5% clock advantage for the Phenom II X2 550 (base: 2.6 GHz vs 3.1 GHz). The Core 2 Extreme X7800 uses the Merom XE (2007) architecture (65 nm), while the Phenom II X2 550 uses Callisto (2009−2010) (45 nm). In PassMark, the Core 2 Extreme X7800 scores 1,138 against the Phenom II X2 550's 1,142 — a 0.4% lead for the Phenom II X2 550. L3 cache: 4 MB L2 Cache on the Core 2 Extreme X7800 vs 6 MB (total) on the Phenom II X2 550.

Feature	Core 2 Extreme X7800	Phenom II X2 550
Cores / Threads	2 / 2	2 / 2
Boost Clock	2.6 GHz	3.1 GHz+19%
Base Clock	2.6 GHz	3.1 GHz+19%
L3 Cache	4 MB L2 Cache	6 MB (total)+50%
L2 Cache	4 MB+700%	512 kB (per core)
Process	65 nm	45 nm-31%
Architecture	Merom XE (2007)	Callisto (2009−2010)
PassMark	1,138	1,142

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Memory & Platform

The Core 2 Extreme X7800 uses the PGA478 socket (PCIe 1.1), while the Phenom II X2 550 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.