Atom N550 vs Pentium G645

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.

Atom N550 vs Pentium G645 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.

Atom N550 vs Pentium G645: Pros, Cons & Final Verdict

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

Atom N550

2010

Why buy it

✅Draws 9W instead of 65W, a 56W reduction.
✅Integrated graphics onboard with Intel GMA 3150, while Pentium G645 needs a discrete GPU.

Trade-offs

❌Lower PassMark (1,435 vs 1,450).

Pentium G645

2012

Why buy it

Trade-offs

❌Launch MSRP is still $80 MSRP, while Atom N550 mostly shows up through inconsistent older-market listings.
❌622.2% higher power demand at 65W vs 9W.
❌No integrated graphics, while Atom N550 can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Pentium G645 better than Atom N550?

Yes. Pentium G645 is the better all-around CPU here. It gives you a 2.0% average FPS lead across 50 shared CPU game tests in our data, 1% 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 G645 is the better pick. According to our tests, it delivers 2.0% 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 G645 is the stronger fit. You are getting 1% better PassMark, backed by 2 cores and 2 threads.

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

Pentium G645 is the better buy right now. Pentium G645 comes in at an unclear MSRP at $80 MSRP versus unclear MSRP, and it still gives you a 2.0% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (18.1 vs 0.0 PassMark/$), 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 G645 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2012 vs 2010) and more multi-core headroom with 2 cores / 2 threads instead of 2/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Atom N550 vs Pentium G645 Technical Specifications

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

Atom N550

The Atom N550 is manufactured by Intel. It was released in 23 August 2010 (15 years ago). It is based on the Pineview (2009−2011) architecture. It features 2 cores and 4 threads. Base frequency is 1.5 GHz, with boost up to 1.5 GHz. L3 cache: 0 kB. L2 cache: 512K (per core). Built on 45 nm process technology. Socket: FCBGA559. Thermal design power (TDP): 8.5 Watt. Memory support: DDR3. Passmark benchmark score: 1,435 points. Launch price was $86.

Pentium G645

The Pentium G645 is manufactured by Intel. It was released in 2 September 2012 (13 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 2 threads. Base frequency is 2.9 GHz, with boost up to 2.9 GHz. L3 cache: 3 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1155. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 1,450 points. Launch price was $80.

⚡

Processing Power

The Atom N550 packs 2 cores / 4 threads, matching the Pentium G645's 2 cores. Boost clocks reach 1.5 GHz on the Atom N550 versus 2.9 GHz on the Pentium G645 — a 63.6% clock advantage for the Pentium G645 (base: 1.5 GHz vs 2.9 GHz). The Atom N550 uses the Pineview (2009−2011) architecture (45 nm), while the Pentium G645 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Atom N550 scores 1,435 against the Pentium G645's 1,450 — a 1% lead for the Pentium G645. L3 cache: 0 kB on the Atom N550 vs 3 MB (total) on the Pentium G645.

Feature	Atom N550	Pentium G645
Cores / Threads	2 / 4	2 / 2
Boost Clock	1.5 GHz	2.9 GHz+93%
Base Clock	1.5 GHz	2.9 GHz+93%
L3 Cache	0 kB	3 MB (total)
L2 Cache	512K (per core)+100%	256 kB (per core)
Process	45 nm	32 nm-29%
Architecture	Pineview (2009−2011)	Sandy Bridge (2011−2013)
PassMark	1,435	1,450+1%

🧠

Memory & Platform

The Atom N550 uses the FCBGA559 socket (PCIe 2.0), while the Pentium G645 uses LGA1155 (PCIe 2.0) — making them incompatible on the same motherboard.