Core i3-6300 vs Core i3-8121U

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 i3-6300 vs Core i3-8121U 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 i3-6300 vs Core i3-8121U: Pros, Cons & Final Verdict

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

Core i3-6300

2015

Why buy it

✅Better for gaming: +10.8% higher average FPS across 50 shared CPU benchmark tests.

Trade-offs

❌Launch MSRP is still $147 MSRP, while Core i3-8121U mostly shows up through inconsistent older-market listings.
❌240% higher power demand at 51W vs 15W.

Core i3-8121U

2018

Why buy it

✅Draws 15W instead of 51W, a 36W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Core i3-6300 across 50 shared CPU benchmark tests.
❌Lower PassMark (4,271 vs 4,331).

Quick Answers

So, is Core i3-6300 better than Core i3-8121U?

Yes. Core i3-6300 is the better all-around CPU here. It gives you a 10.8% average FPS lead across 50 shared CPU game tests in our data and 1.4% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core i3-6300 is the better pick. According to our tests, it delivers 10.8% 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, Core i3-6300 is the stronger fit. You are getting 1.4% better PassMark, backed by 2 cores and 4 threads.

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

Core i3-6300 is the better buy right now. Core i3-6300 comes in at an unclear MSRP at $147 MSRP versus unclear MSRP, and it still gives you a 10.8% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (29.5 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core i3-8121U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2018 vs 2015). That makes it the safer long-term bet.

Core i3-6300 vs Core i3-8121U Technical Specifications

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

Core i3-6300

The Core i3-6300 is manufactured by Intel. It was released in 1 September 2015 (10 years ago). It is based on the Skylake (2015−2016) architecture. It features 2 cores and 4 threads. Base frequency is 3.8 GHz, with boost up to 3.8 GHz. L3 cache: 4 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 51 Watt. Memory support: DDR4. Passmark benchmark score: 4,331 points. Launch price was $147.

Core i3-8121U

The Core i3-8121U is manufactured by Intel. It was released in 5 May 2018 (7 years ago). It is based on the Coffee Lake-U (2018−2019) architecture. It features 2 cores and 4 threads. Base frequency is 2.2 GHz, with boost up to 3.2 GHz. L3 cache: 4 MB (total). L2 cache: 256K (per core). Built on 10 nm process technology. Socket: BGA1440. Thermal design power (TDP): 15 Watt. Memory support: DDR4. Passmark benchmark score: 4,271 points. Launch price was $69.

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Processing Power

Both the Core i3-6300 and Core i3-8121U share an identical 2-core/4-thread configuration. Boost clocks reach 3.8 GHz on the Core i3-6300 versus 3.2 GHz on the Core i3-8121U — a 17.1% clock advantage for the Core i3-6300 (base: 3.8 GHz vs 2.2 GHz). The Core i3-6300 uses the Skylake (2015−2016) architecture (14 nm), while the Core i3-8121U uses Coffee Lake-U (2018−2019) (10 nm). In PassMark, the Core i3-6300 scores 4,331 against the Core i3-8121U's 4,271 — a 1.4% lead for the Core i3-6300. Both processors carry 4 MB (total) of L3 cache.

Feature	Core i3-6300	Core i3-8121U
Cores / Threads	2 / 4	2 / 4
Boost Clock	3.8 GHz+19%	3.2 GHz
Base Clock	3.8 GHz+73%	2.2 GHz
L3 Cache	4 MB (total)	4 MB (total)
L2 Cache	256K (per core)	256K (per core)
Process	14 nm	10 nm-29%
Architecture	Skylake (2015−2016)	Coffee Lake-U (2018−2019)
PassMark	4,331+1%	4,271
Geekbench 6 Single	—	1,178
Geekbench 6 Multi	—	2,250

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Memory & Platform

The Core i3-6300 uses the LGA1151 socket (PCIe 3.0), while the Core i3-8121U uses BGA1440 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i3-6300	Core i3-8121U
Socket	LGA1151	BGA1440
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	—	DDR4-2400
Max RAM Capacity	—	32 GB
RAM Channels	—	2
ECC Support	—	No
PCIe Lanes	—	16

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Advanced Features

Virtualization: not specified (Core i3-6300) / VT-x, VT-d, EPT (Core i3-8121U). Primary use case: Core i3-8121U targets Productivity. Direct competitor: Core i3-8121U rivals Core i3-8130U.