Core i3-4020Y 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.

Core i3-4020Y 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.

Core i3-4020Y 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.

Core i3-4020Y

2013

Why buy it

✅100+% more PCIe lanes (12 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel HD Graphics 4200, while Pentium G645 needs a discrete GPU.

Trade-offs

❌Lower PassMark (1,448 vs 1,450).
❌687.7% higher power demand at 512W vs 65W.

Pentium G645

2012

Why buy it

✅Draws 65W instead of 512W, a 447W reduction.

Trade-offs

❌Launch MSRP is still $80 MSRP, while Core i3-4020Y mostly shows up through inconsistent older-market listings.
❌No integrated graphics, while Core i3-4020Y can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Pentium G645 better than Core i3-4020Y?

Yes. Pentium G645 is the better all-around CPU here. It gives you a 0.5% average FPS lead across 50 shared CPU game tests in our data and 0.1% better PassMark, 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 0.5% 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 0.1% 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 $80 MSRP versus unclear MSRP, and it still gives you a 0.5% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (18.1 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core i3-4020Y makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2013 vs 2012). That makes it the safer long-term bet.

Core i3-4020Y vs Pentium G645 Technical Specifications

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

Core i3-4020Y

The Core i3-4020Y is manufactured by Intel. It was released in 1 September 2013 (12 years ago). It is based on the Haswell (2013−2015) architecture. It features 2 cores and 4 threads. Base frequency is 1.5 GHz, with boost up to 1.5 GHz. L3 cache: 3 MB. L2 cache: 512 kB. Built on 22 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 11.5 Watt. Memory support: DDR3. Passmark benchmark score: 1,448 points. Launch price was $304.

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.

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Processing Power

The Core i3-4020Y packs 2 cores / 4 threads, matching the Pentium G645's 2 cores. Boost clocks reach 1.5 GHz on the Core i3-4020Y 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 Core i3-4020Y uses the Haswell (2013−2015) architecture (22 nm), while the Pentium G645 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Core i3-4020Y scores 1,448 against the Pentium G645's 1,450 — a 0.1% lead for the Pentium G645. L3 cache: 3 MB on the Core i3-4020Y vs 3 MB (total) on the Pentium G645.

Feature	Core i3-4020Y	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	3 MB	3 MB (total)
L2 Cache	512 kB+100%	256 kB (per core)
Process	22 nm-31%	32 nm
Architecture	Haswell (2013−2015)	Sandy Bridge (2011−2013)
PassMark	1,448	1,450

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Memory & Platform

The Core i3-4020Y uses the FCBGA1168 socket (PCIe 3.0), while the Pentium G645 uses LGA1155 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Core i3-4020Y	Pentium G645
Socket	FCBGA1168	LGA1155
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	1600	—
Max RAM Capacity	16	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	12	—

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Advanced Features

Virtualization: true (Core i3-4020Y) / not specified (Pentium G645). The Core i3-4020Y includes integrated graphics (Intel HD Graphics 4200), while the Pentium G645 requires a dedicated GPU.