Core 2 Extreme X6800 vs Xeon 5120

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 X6800 vs Xeon 5120 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 X6800 vs Xeon 5120: 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 X6800

2006

Why buy it

✅+0.3% higher PassMark.

Trade-offs

❌15.4% higher power demand at 75W vs 65W.

Xeon 5120

2006

Why buy it

✅Draws 65W instead of 75W, a 10W reduction.

Trade-offs

❌Lower PassMark (1,115 vs 1,118).
❌Launch MSRP is still $107 MSRP, while Core 2 Extreme X6800 mostly shows up through inconsistent older-market listings.

Quick Answers

So, is Xeon 5120 better than Core 2 Extreme X6800?

Not really, because they are built for different jobs. Xeon 5120 makes more sense for workstation-style multi-core throughput, while Core 2 Extreme X6800 is the more practical desktop choice for gaming, platform cost, and everyday use.

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

For streaming, content creation, and heavier multitasking, Core 2 Extreme X6800 is the stronger fit. You are getting 0.3% better PassMark, backed by 2 cores and 2 threads.

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

Xeon 5120 is the better buy right now. Xeon 5120 comes in at an unclear MSRP at $107 MSRP versus unclear MSRP, and it still gives you a 0.2% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Core 2 Extreme X6800 is still stronger for heavier multi-core work with 0.3% better PassMark. It is also 100.0% better value on MSRP (10.4 vs 0.0 PassMark/$), 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 Extreme X6800 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 X6800 vs Xeon 5120 Technical Specifications

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

Core 2 Extreme X6800

The Core 2 Extreme X6800 is manufactured by Intel. It was released in 27 July 2006 (19 years ago). It is based on the Conroe XE (2006) architecture. It features 2 cores and 2 threads. Base frequency is 2.933 GHz, with boost up to 0.93 GHz. L3 cache: 0 kB. L2 cache: 4 MB (total). Built on 65 nm process technology. Socket: LGA775. Thermal design power (TDP): 75 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 1,118 points. Launch price was $999.

Xeon 5120

The Xeon 5120 is manufactured by Intel. It was released in Junho 2006 (19 years ago). It is based on the Woodcrest (2006) architecture. It features 2 cores and 2 threads. Base frequency is 1.86 GHz, with boost up to 1.87 GHz. L3 cache: 0 kB. L2 cache: 4 MB. Built on 65 nm process technology. Socket: LGA771. Thermal design power (TDP): 65 Watt. Memory support: DDR2. Passmark benchmark score: 1,115 points. Launch price was $45.

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Processing Power

Both the Core 2 Extreme X6800 and Xeon 5120 share an identical 2-core/2-thread configuration. Boost clocks reach 0.93 GHz on the Core 2 Extreme X6800 versus 1.87 GHz on the Xeon 5120 — a 67.1% clock advantage for the Xeon 5120 (base: 2.933 GHz vs 1.86 GHz). The Core 2 Extreme X6800 uses the Conroe XE (2006) architecture (65 nm), while the Xeon 5120 uses Woodcrest (2006) (65 nm). In PassMark, the Core 2 Extreme X6800 scores 1,118 against the Xeon 5120's 1,115 — a 0.3% lead for the Core 2 Extreme X6800. Both processors carry 0 kB of L3 cache.

Feature	Core 2 Extreme X6800	Xeon 5120
Cores / Threads	2 / 2	2 / 2
Boost Clock	0.93 GHz	1.87 GHz+101%
Base Clock	2.933 GHz+58%	1.86 GHz
L3 Cache	0 kB	0 kB
L2 Cache	4 MB (total)	4 MB
Process	65 nm	65 nm
Architecture	Conroe XE (2006)	Woodcrest (2006)
PassMark	1,118	1,115

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Memory & Platform

The Core 2 Extreme X6800 uses the LGA775 socket (PCIe 1.1), while the Xeon 5120 uses LGA771 (PCIe 2.0) — making them incompatible on the same motherboard.