Core 2 Duo E6550 vs Core 2 Duo SU9300

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 E6550 vs Core 2 Duo SU9300 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 E6550 vs Core 2 Duo SU9300: 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 E6550

2007

Why buy it

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (true), unlike Core 2 Duo SU9300.

Trade-offs

❌Launch MSRP is still $163 MSRP, while Core 2 Duo SU9300 mostly shows up through inconsistent older-market listings.
❌2066.7% higher power demand at 65W vs 3W.

Core 2 Duo SU9300

2008

Why buy it

✅Draws 3W instead of 65W, a 62W reduction.

Trade-offs

❌Lower PassMark (1,392 vs 1,395).
❌No boxed cooler included, unlike Core 2 Duo E6550.

Quick Answers

So, is Core 2 Duo E6550 better than Core 2 Duo SU9300?

Yes. Core 2 Duo E6550 is the better all-around CPU here. It gives you a 2.6% average FPS lead across 50 shared CPU game tests in our data and 0.2% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core 2 Duo E6550 is the better pick. According to our tests, it delivers 2.6% 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, Core 2 Duo E6550 is the stronger fit. You are getting 0.2% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Duo E6550 is the better buy right now. Core 2 Duo E6550 comes in at an unclear MSRP at $163 MSRP versus unclear MSRP, and it still gives you a 2.6% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (8.6 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core 2 Duo SU9300 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2008 vs 2007). That makes it the safer long-term bet.

Core 2 Duo E6550 vs Core 2 Duo SU9300 Technical Specifications

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

Core 2 Duo E6550

The Core 2 Duo E6550 is manufactured by Intel. It was released in 2008-01-01. It is based on the Conroe (2006−2007) architecture. It features 2 cores and 2 threads. Base frequency is 2.33 GHz, with boost up to 2.33 GHz. L3 cache: 0 kB. L2 cache: 4 MB. Built on 65 nm process technology. Socket: LGA775. Thermal design power (TDP): 65 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 1,395 points. Launch price was $249.

Core 2 Duo SU9300

The Core 2 Duo SU9300 is manufactured by Intel. It was released in 2008-01-01. It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 1.2 GHz, with boost up to 1.2 GHz. L3 cache: 3 MB L2 Cache. L2 cache: 3 MB. Built on 45 nm process technology. Socket: BGA956. Thermal design power (TDP): 10 Watt. Passmark benchmark score: 1,392 points. Launch price was $249.

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Processing Power

Both the Core 2 Duo E6550 and Core 2 Duo SU9300 share an identical 2-core/2-thread configuration. Boost clocks reach 2.33 GHz on the Core 2 Duo E6550 versus 1.2 GHz on the Core 2 Duo SU9300 — a 64% clock advantage for the Core 2 Duo E6550 (base: 2.33 GHz vs 1.2 GHz). The Core 2 Duo E6550 uses the Conroe (2006−2007) architecture (65 nm), while the Core 2 Duo SU9300 uses Penryn (2008−2011) (45 nm). In PassMark, the Core 2 Duo E6550 scores 1,395 against the Core 2 Duo SU9300's 1,392 — a 0.2% lead for the Core 2 Duo E6550. L3 cache: 0 kB on the Core 2 Duo E6550 vs 3 MB L2 Cache on the Core 2 Duo SU9300.

Feature	Core 2 Duo E6550	Core 2 Duo SU9300
Cores / Threads	2 / 2	2 / 2
Boost Clock	2.33 GHz+94%	1.2 GHz
Base Clock	2.33 GHz+94%	1.2 GHz
L3 Cache	0 kB	3 MB L2 Cache
L2 Cache	4 MB+33%	3 MB
Process	65 nm	45 nm-31%
Architecture	Conroe (2006−2007)	Penryn (2008−2011)
PassMark	1,395	1,392

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Memory & Platform

The Core 2 Duo E6550 uses the LGA775 socket (PCIe 1.1), while the Core 2 Duo SU9300 uses BGA956 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Core 2 Duo E6550	Core 2 Duo SU9300
Socket	LGA775	BGA956
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	1333	—
Max RAM Capacity	16	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: true (Core 2 Duo E6550) / not specified (Core 2 Duo SU9300). Direct competitor: Core 2 Duo E6550 rivals Athlon 64 X2 6000+.