Core 2 Duo T5550 vs Phenom II X3 B77

Core 2 Duo T5550 vs Phenom II X3 B77 Performance Spectrum

Core 2 Duo T5550

2 / 2

1,826

0.0%

Pentium B950

Core i3-2310M

Pentium J3710

Celeron Dual-Core T1500

1,844

+1.0%

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 2 Duo T5550 vs Phenom II X3 B77 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 Duo T5550 vs Phenom II X3 B77: 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 Duo T5550

2008

Why buy it

✅Draws 2W instead of 95W, a 93W reduction.

Trade-offs

❌Lower PassMark (1,826 vs 1,844).
❌Smaller total L3 cache (2 MB vs 6 MB).

Phenom II X3 B77

2010

Why buy it

✅+200% larger total L3 cache (6 MB vs 2 MB).

Trade-offs

❌Launch MSRP is still $281 MSRP, while Core 2 Duo T5550 mostly shows up through inconsistent older-market listings.
❌4650% higher power demand at 95W vs 2W.

Quick Answers

So, is Phenom II X3 B77 better than Core 2 Duo T5550?

Yes. Phenom II X3 B77 is the better all-around CPU here. It gives you a 0.6% average FPS lead across 50 shared CPU game tests in our data, 1% 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 X3 B77 is the better pick. According to our tests, it delivers 0.6% 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 X3 B77 is the stronger fit. You are getting 1% better PassMark, backed by 3 cores and 3 threads. It also has the larger cache pool with 200% larger total L3 cache (6 MB vs 2 MB).

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

Phenom II X3 B77 is the better buy right now. Phenom II X3 B77 comes in at an unclear MSRP at $281 MSRP versus unclear MSRP, and it still gives you a 0.6% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (6.6 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Phenom II X3 B77 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2010 vs 2008), 200% larger total L3 cache (6 MB vs 2 MB), and more multi-core headroom with 3 cores / 3 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 Duo T5550 vs Phenom II X3 B77 Technical Specifications

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

Core 2 Duo T5550

The Core 2 Duo T5550 is manufactured by Intel. It was released in 2008-01-01. It is based on the Merom (2006−2008) architecture. It features 2 cores and 2 threads. Base frequency is 1.83 GHz, with boost up to 1.83 GHz. L3 cache: 2 MB L2 Cache. L2 cache: 2 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 1,826 points. Launch price was $249.

Phenom II X3 B77

The Phenom II X3 B77 is manufactured by AMD. It was released in 2009-01-01. It is based on the Heka (2009−2010) architecture. It features 3 cores and 3 threads. Base frequency is 3.2 GHz, with boost up to 3.2 GHz. L3 cache: 6 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: 1,844 points. Launch price was $149.

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Processing Power

The Core 2 Duo T5550 packs 2 cores / 2 threads, while the Phenom II X3 B77 offers 3 cores / 3 threads — the Phenom II X3 B77 has 1 more core. Boost clocks reach 1.83 GHz on the Core 2 Duo T5550 versus 3.2 GHz on the Phenom II X3 B77 — a 54.5% clock advantage for the Phenom II X3 B77 (base: 1.83 GHz vs 3.2 GHz). The Core 2 Duo T5550 uses the Merom (2006−2008) architecture (65 nm), while the Phenom II X3 B77 uses Heka (2009−2010) (45 nm). In PassMark, the Core 2 Duo T5550 scores 1,826 against the Phenom II X3 B77's 1,844 — a 1% lead for the Phenom II X3 B77. L3 cache: 2 MB L2 Cache on the Core 2 Duo T5550 vs 6 MB (total) on the Phenom II X3 B77.

Feature	Core 2 Duo T5550	Phenom II X3 B77
Cores / Threads	2 / 2	3 / 3+50%
Boost Clock	1.83 GHz	3.2 GHz+75%
Base Clock	1.83 GHz	3.2 GHz+75%
L3 Cache	2 MB L2 Cache	6 MB (total)+200%
L2 Cache	2 MB+300%	512 kB (per core)
Process	65 nm	45 nm-31%
Architecture	Merom (2006−2008)	Heka (2009−2010)
PassMark	1,826	1,844

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Memory & Platform

The Core 2 Duo T5550 uses the PGA478 socket (PCIe 1.1), while the Phenom II X3 B77 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.