Celeron M 585 vs Core 2 Extreme X9100

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.

Celeron M 585 vs Core 2 Extreme X9100 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.

Celeron M 585 vs Core 2 Extreme X9100: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Celeron M 585

2008

Why buy it

✅Draws 1W instead of 44W, a 43W reduction.

Trade-offs

❌Lower PassMark (2,062 vs 2,063).

Core 2 Extreme X9100

2008

Why buy it

✅+0% higher PassMark.

Trade-offs

❌Launch MSRP is still $851 MSRP, while Celeron M 585 mostly shows up through inconsistent older-market listings.
❌4300% higher power demand at 44W vs 1W.

Quick Answers

So, is Core 2 Extreme X9100 better than Celeron M 585?

It depends on what you want from the system. For gaming, Celeron M 585 is ahead with a 1.3% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core 2 Extreme X9100 pulls ahead with 0% better PassMark.

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

For streaming, content creation, and heavier multitasking, Core 2 Extreme X9100 is the stronger fit. You are getting 0% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Extreme X9100 is the better buy right now. Core 2 Extreme X9100 comes in at an unclear MSRP at $851 MSRP versus unclear MSRP, and it still gives you 0% better PassMark. The compromise is that Celeron M 585 is still the better pure gaming CPU with a 1.3% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (2.4 vs 0.0 PassMark/$), 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 X9100 makes more sense long term for 2026 and beyond. You are getting more multi-core headroom with 2 cores / 2 threads instead of 1/1. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Celeron M 585 vs Core 2 Extreme X9100 Technical Specifications

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

Celeron M 585

The Celeron M 585 is manufactured by Intel. It was released in 20 August 2008 (17 years ago). It is based on the Merom (2006−2008) architecture. It features 1 cores and 1 threads. Max frequency: 2.16 GHz. L2 cache: 1 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 1 MB. Passmark benchmark score: 2,062 points. Launch price was $70.

Core 2 Extreme X9100

The Core 2 Extreme X9100 is manufactured by Intel. It was released in 1 July 2008 (17 years ago). It is based on the Penryn XE (2008) architecture. It features 2 cores and 2 threads. Base frequency is 3.06 GHz, with boost up to 0.07 GHz. L3 cache: 0 kB. L2 cache: 6 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 44 Watt. Memory support: DDR2, DDR3 Depends on motherboard. Passmark benchmark score: 2,063 points. Launch price was $851.

⚡

Processing Power

The Celeron M 585 packs 1 cores / 1 threads, while the Core 2 Extreme X9100 offers 2 cores / 2 threads — the Core 2 Extreme X9100 has 1 more core. Boost clocks reach 2.16 GHz on the Celeron M 585 versus 0.07 GHz on the Core 2 Extreme X9100 — a 187.4% clock advantage for the Celeron M 585. The Celeron M 585 uses the Merom (2006−2008) architecture (65 nm), while the Core 2 Extreme X9100 uses Penryn XE (2008) (45 nm). In PassMark, the Celeron M 585 scores 2,062 against the Core 2 Extreme X9100's 2,063 — a 0% lead for the Core 2 Extreme X9100.

Feature	Celeron M 585	Core 2 Extreme X9100
Cores / Threads	1 / 1	2 / 2+100%
Boost Clock	2.16 GHz+2986%	0.07 GHz
Base Clock	—	3.06 GHz
L3 Cache	—	0 kB
L2 Cache	1 MB	6 MB+500%
Process	65 nm	45 nm-31%
Architecture	Merom (2006−2008)	Penryn XE (2008)
PassMark	2,062	2,063

🧠

Memory & Platform

Both processors use the PGA478 socket with PCIe 1.1.

Feature	Celeron M 585	Core 2 Extreme X9100
Socket	PGA478	PGA478
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	800	—
Max RAM Capacity	4	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	0	—

🔧

Advanced Features

Virtualization: false (Celeron M 585) / not specified (Core 2 Extreme X9100). Direct competitor: Celeron M 585 rivals Mobile Sempron SI-40.