Celeron M 585 vs Pentium G3258

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 Pentium G3258 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 Pentium G3258: 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 54W, a 53W reduction.

Trade-offs

❌Lower PassMark (2,062 vs 2,063).
❌No integrated graphics, while Pentium G3258 can still boot and troubleshoot without a discrete GPU.

Pentium G3258

2014

Why buy it

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with HD Graphics, while Celeron M 585 needs a discrete GPU.

Trade-offs

❌Launch MSRP is still $75 MSRP, while Celeron M 585 mostly shows up through inconsistent older-market listings.
❌5300% higher power demand at 54W vs 1W.

Quick Answers

So, is Pentium G3258 better than Celeron M 585?

Yes. Pentium G3258 is the better all-around CPU here. It gives you a 0.3% average FPS lead across 50 shared CPU game tests in our data, 0% 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, Pentium G3258 is the better pick. According to our tests, it delivers 0.3% 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, Pentium G3258 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?

Pentium G3258 is the better buy right now. Pentium G3258 comes in at an unclear MSRP at $75 MSRP versus unclear MSRP, and it still gives you a 0.3% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (27.5 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Pentium G3258 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2014 vs 2008) and 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 Pentium G3258 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.

Pentium G3258

The Pentium G3258 is manufactured by Intel. It was released in 2 June 2014 (11 years ago). It is based on the Haswell (2013−2015) architecture. It features 2 cores and 2 threads. Base frequency is 3.2 GHz, with boost up to 3.2 GHz. L3 cache: 3 MB (total). L2 cache: 256 kB (per core). Built on 22 nm process technology. Socket: LGA1150. Thermal design power (TDP): 53 Watt. Memory support: DDR3. Passmark benchmark score: 2,063 points. Launch price was $77.

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Processing Power

The Celeron M 585 packs 1 cores / 1 threads, while the Pentium G3258 offers 2 cores / 2 threads — the Pentium G3258 has 1 more core. Boost clocks reach 2.16 GHz on the Celeron M 585 versus 3.2 GHz on the Pentium G3258 — a 38.8% clock advantage for the Pentium G3258. The Celeron M 585 uses the Merom (2006−2008) architecture (65 nm), while the Pentium G3258 uses Haswell (2013−2015) (22 nm). In PassMark, the Celeron M 585 scores 2,062 against the Pentium G3258's 2,063 — a 0% lead for the Pentium G3258.

Feature	Celeron M 585	Pentium G3258
Cores / Threads	1 / 1	2 / 2+100%
Boost Clock	2.16 GHz	3.2 GHz+48%
Base Clock	—	3.2 GHz
L3 Cache	—	3 MB (total)
L2 Cache	1 MB+300%	256 kB (per core)
Process	65 nm	22 nm-66%
Architecture	Merom (2006−2008)	Haswell (2013−2015)
PassMark	2,062	2,063

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Memory & Platform

The Celeron M 585 uses the PGA478 socket (PCIe 1.1), while the Pentium G3258 uses LGA1150 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 800 on the Celeron M 585 versus DDR3-1333 on the Pentium G3258 — the Pentium G3258 supports 66.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Pentium G3258 supports up to 32 GB of RAM compared to 4 GB — 700% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Celeron M 585) vs 16 (Pentium G3258) — the Pentium G3258 offers 16 more lanes for additional GPUs or NVMe drives.

Feature	Celeron M 585	Pentium G3258
Socket	PGA478	LGA1150
PCIe Generation	PCIe 1.1	PCIe 3.0+173%
Max RAM Speed	800	DDR3-1333+67%
Max RAM Capacity	4 GB	32 GB+700%
RAM Channels	2	2
ECC Support	No	Yes
PCIe Lanes	0	16

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Advanced Features

Only the Pentium G3258 has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: false (Celeron M 585) vs VT-x (Pentium G3258). The Pentium G3258 includes integrated graphics (HD Graphics), while the Celeron M 585 requires a dedicated GPU. Primary use case: Pentium G3258 targets Desktop. Direct competitor: Celeron M 585 rivals Mobile Sempron SI-40.