Core 2 Duo P8400 vs Phenom II X2 N620

Core 2 Duo P8400 vs Phenom II X2 N620 Performance Spectrum

Core 2 Duo P8400

2 / 2

2,497

0.0%

2,503

+0.2%

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 P8400 vs Phenom II X2 N620 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 P8400 vs Phenom II X2 N620: 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 P8400

2008

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Phenom II X2 N620 across 50 shared CPU benchmark tests.
❌Lower PassMark (2,497 vs 2,503).
❌Launch MSRP is still $209 MSRP, while Phenom II X2 N620 mostly shows up through inconsistent older-market listings.
❌50% higher power demand at 3W vs 2W.

Phenom II X2 N620

2010

Why buy it

✅Better for gaming: +5.6% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 2W instead of 3W, a 1W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is Phenom II X2 N620 better than Core 2 Duo P8400?

Yes. Phenom II X2 N620 is the better all-around CPU here. It gives you a 5.6% average FPS lead across 50 shared CPU game tests in our data, 0.2% 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 N620 is the better pick. According to our tests, it delivers 5.6% 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 X2 N620 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?

Phenom II X2 N620 is still the much better call for a fresh build. Phenom II X2 N620 comes in at an unclear MSRP at unclear MSRP versus $209 MSRP, and it still gives you a 5.6% average FPS lead across 50 shared CPU game tests in our data. Core 2 Duo P8400 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2008 platform. Even with 100.0% better value on paper (11.9 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on PGA478.

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

Phenom II X2 N620 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2010 vs 2008) 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 Duo P8400 vs Phenom II X2 N620 Technical Specifications

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

Core 2 Duo P8400

The Core 2 Duo P8400 is manufactured by Intel. It was released in 15 July 2008 (17 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.26 GHz, with boost up to 2.26 GHz. L3 cache: 3 MB L2 Cache. L2 cache: 3 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 25 Watt. Passmark benchmark score: 2,497 points. Launch price was $209.

Phenom II X2 N620

The Phenom II X2 N620 is manufactured by AMD. It was released in 2009-01-01. It is based on the Champlain (2010−2011) architecture. It features 2 cores and 2 threads. Max frequency: 2.8 GHz. L2 cache: 2 MB. Built on 45 nm process technology. Socket: S1. Thermal design power (TDP): 2 MB. Memory support: DDR3. Passmark benchmark score: 2,503 points. Launch price was $149.

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Processing Power

Both the Core 2 Duo P8400 and Phenom II X2 N620 share an identical 2-core/2-thread configuration. Boost clocks reach 2.26 GHz on the Core 2 Duo P8400 versus 2.8 GHz on the Phenom II X2 N620 — a 21.3% clock advantage for the Phenom II X2 N620. The Core 2 Duo P8400 uses the Penryn (2008−2011) architecture (45 nm), while the Phenom II X2 N620 uses Champlain (2010−2011) (45 nm). In PassMark, the Core 2 Duo P8400 scores 2,497 against the Phenom II X2 N620's 2,503 — a 0.2% lead for the Phenom II X2 N620.

Feature	Core 2 Duo P8400	Phenom II X2 N620
Cores / Threads	2 / 2	2 / 2
Boost Clock	2.26 GHz	2.8 GHz+24%
Base Clock	2.26 GHz	—
L3 Cache	3 MB L2 Cache	—
L2 Cache	3 MB+50%	2 MB
Process	45 nm	45 nm
Architecture	Penryn (2008−2011)	Champlain (2010−2011)
PassMark	2,497	2,503

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Memory & Platform

The Core 2 Duo P8400 uses the PGA478 socket (PCIe 1.1), while the Phenom II X2 N620 uses S1 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Core 2 Duo P8400	Phenom II X2 N620
Socket	PGA478	S1
PCIe Generation	PCIe 1.1	PCIe 2.0+82%
Max RAM Speed	1066	—
Max RAM Capacity	8	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	0	—

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Advanced Features

Virtualization: true (Core 2 Duo P8400) / not specified (Phenom II X2 N620). Direct competitor: Core 2 Duo P8400 rivals Turion II Ultra M600.