Core 2 Duo T9550 vs Core 2 Extreme QX9300

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 T9550 vs Core 2 Extreme QX9300 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 T9550 vs Core 2 Extreme QX9300: 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 T9550

2009

Why buy it

✅Draws 6W instead of 12W, a 6W reduction.

Trade-offs

❌Lower PassMark (1,804 vs 1,805).

Core 2 Extreme QX9300

2008

Why buy it

✅+0.1% higher PassMark.

Trade-offs

❌100% higher power demand at 12W vs 6W.

Quick Answers

So, is Core 2 Duo T9550 better than Core 2 Extreme QX9300?

It depends on what you want from the system. For gaming, Core 2 Duo T9550 is ahead with a 2.4% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core 2 Extreme QX9300 pulls ahead with 0.1% better PassMark.

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

For streaming, content creation, and heavier multitasking, Core 2 Extreme QX9300 is the stronger fit. You are getting 0.1% better PassMark, backed by 4 cores and 4 threads.

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

Core 2 Duo T9550 still makes the most sense overall. Core 2 Duo T9550 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 2.4% average FPS lead across 50 shared CPU game tests in our data.

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

Core 2 Duo T9550 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2008). That makes it the safer long-term bet.

Core 2 Duo T9550 vs Core 2 Extreme QX9300 Technical Specifications

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

Core 2 Duo T9550

The Core 2 Duo T9550 is manufactured by Intel. It was released in 1 January 2009 (16 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.66 GHz, with boost up to 2.66 GHz. L3 cache: 6 MB L2 Cache. L2 cache: 6 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 1,804 points. Launch price was $316.

Core 2 Extreme QX9300

The Core 2 Extreme QX9300 is manufactured by Intel. It was released in 2008-01-01. It is based on the Penryn (2008−2011) architecture. It features 4 cores and 4 threads. Base frequency is 2.53 GHz, with boost up to 2.53 GHz. L3 cache: 0 kB. L2 cache: 12 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 45 Watt. Passmark benchmark score: 1,805 points. Launch price was $249.

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Processing Power

The Core 2 Duo T9550 packs 2 cores / 2 threads, while the Core 2 Extreme QX9300 offers 4 cores / 4 threads — the Core 2 Extreme QX9300 has 2 more cores. Boost clocks reach 2.66 GHz on the Core 2 Duo T9550 versus 2.53 GHz on the Core 2 Extreme QX9300 — a 5% clock advantage for the Core 2 Duo T9550 (base: 2.66 GHz vs 2.53 GHz). Both are built on the Penryn (2008−2011) architecture using a 45 nm process. In PassMark, the Core 2 Duo T9550 scores 1,804 against the Core 2 Extreme QX9300's 1,805 — a 0.1% lead for the Core 2 Extreme QX9300. L3 cache: 6 MB L2 Cache on the Core 2 Duo T9550 vs 0 kB on the Core 2 Extreme QX9300.

Feature	Core 2 Duo T9550	Core 2 Extreme QX9300
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	2.66 GHz+5%	2.53 GHz
Base Clock	2.66 GHz+5%	2.53 GHz
L3 Cache	6 MB L2 Cache	0 kB
L2 Cache	6 MB	12 MB+100%
Process	45 nm	45 nm
Architecture	Penryn (2008−2011)	Penryn (2008−2011)
PassMark	1,804	1,805