Core 2 Extreme X7800 vs Core 2 Extreme X7900

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 Core 2 Extreme X7900 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 Core 2 Extreme X7900: 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

✅+2.1% higher PassMark.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

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

Core 2 Extreme X7900

2007

Why buy it

Trade-offs

❌Lower PassMark (1,115 vs 1,138).

Quick Answers

So, is Core 2 Extreme X7800 better than Core 2 Extreme X7900?

It depends on what you want from the system. For gaming, Core 2 Extreme X7900 is ahead with a 1.8% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core 2 Extreme X7800 pulls ahead with 2.1% better PassMark.

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

For streaming, content creation, and heavier multitasking, Core 2 Extreme X7800 is the stronger fit. You are getting 2.1% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Extreme X7800 still makes the most sense overall. Core 2 Extreme X7800 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 2.1% better PassMark.

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

Core 2 Extreme X7800 makes more sense long term for 2026 and beyond. You are getting 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 Core 2 Extreme X7900 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.

Core 2 Extreme X7900

The Core 2 Extreme X7900 is manufactured by Intel. It was released in 1 September 2007 (18 years ago). It is based on the Merom (2006−2008) architecture. It features 2 cores and 2 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 0 kB. L2 cache: 4 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 44 Watt. Memory support: DDR1. Passmark benchmark score: 1,115 points. Launch price was $851.

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Processing Power

Both the Core 2 Extreme X7800 and Core 2 Extreme X7900 share an identical 2-core/2-thread configuration. Boost clocks reach 2.6 GHz on the Core 2 Extreme X7800 versus 2.8 GHz on the Core 2 Extreme X7900 — a 7.4% clock advantage for the Core 2 Extreme X7900 (base: 2.6 GHz vs 2.8 GHz). The Core 2 Extreme X7800 uses the Merom XE (2007) architecture (65 nm), while the Core 2 Extreme X7900 uses Merom (2006−2008) (65 nm). In PassMark, the Core 2 Extreme X7800 scores 1,138 against the Core 2 Extreme X7900's 1,115 — a 2% lead for the Core 2 Extreme X7800. L3 cache: 4 MB L2 Cache on the Core 2 Extreme X7800 vs 0 kB on the Core 2 Extreme X7900.

Feature	Core 2 Extreme X7800	Core 2 Extreme X7900
Cores / Threads	2 / 2	2 / 2
Boost Clock	2.6 GHz	2.8 GHz+8%
Base Clock	2.6 GHz	2.8 GHz+8%
L3 Cache	4 MB L2 Cache	0 kB
L2 Cache	4 MB	4 MB
Process	65 nm	65 nm
Architecture	Merom XE (2007)	Merom (2006−2008)
PassMark	1,138+2%	1,115

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Memory & Platform

Both processors use the PGA478 socket with PCIe 1.1. Both support up to DDR2-667 memory speed. Both support up to 4 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Core 2 Extreme X7800) vs 0 (Core 2 Extreme X7900) — the Core 2 Extreme X7800 offers 16 more lanes for additional GPUs or NVMe drives.

Feature	Core 2 Extreme X7800	Core 2 Extreme X7900
Socket	PGA478	PGA478
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	DDR2-667	DDR2-667
Max RAM Capacity	4 GB	4 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16	0

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Advanced Features

Both processors feature an unlocked multiplier for overclocking. Both support VT-x virtualization. Primary use case: Core 2 Extreme X7900 targets Mobile.