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 i5-6300U vs Core i7-875K 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 i5-6300U vs Core i7-875K: Pros, Cons & Final Verdict

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

Core i5-6300U

2015

Why buy it

✅+0.9% higher PassMark.
✅Draws 15W instead of 95W, a 80W reduction.
✅Integrated graphics onboard with HD Graphics 520, while Core i7-875K needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-875K across 50 shared CPU benchmark tests.
❌Smaller total L3 cache (3 MB vs 8 MB).

Core i7-875K

2010

Why buy it

✅Better for gaming: +9.8% higher average FPS across 50 shared CPU benchmark tests.
✅+166.7% larger total L3 cache (8 MB vs 3 MB).
✅33.3% more PCIe lanes (16 vs 12) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (3,177 vs 3,207).
❌Launch MSRP is still $353 MSRP, while Core i5-6300U mostly shows up through inconsistent older-market listings.
❌533.3% higher power demand at 95W vs 15W.
❌No integrated graphics, while Core i5-6300U can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i5-6300U better than Core i7-875K?

It depends on what you want from the system. For gaming, Core i7-875K is ahead with a 9.8% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i5-6300U pulls ahead with 0.9% better PassMark. Core i7-875K also has the bigger cache pool with 166.7% larger total L3 cache (8 MB vs 3 MB).

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

For streaming, content creation, and heavier multitasking, Core i5-6300U is the stronger fit. You are getting 0.9% better PassMark, backed by 2 cores and 4 threads.

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

Core i5-6300U is still the much better call for a fresh build. Core i5-6300U comes in at an unclear MSRP at unclear MSRP versus $353 MSRP, and it still gives you 0.9% better PassMark. Core i7-875K only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2010 platform. Even with 100.0% better value on paper (9.0 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA1156.

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

Core i5-6300U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2010) and more multi-core headroom with 2 cores / 4 threads instead of 4/8. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core i5-6300U vs Core i7-875K Technical Specifications

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

Core i5-6300U

The Core i5-6300U 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 2.4 GHz, with boost up to 3 GHz. L3 cache: 3 MB. L2 cache: 512 kB. Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 3,207 points. Launch price was $281.

Core i7-875K

The Core i7-875K is manufactured by Intel. It was released in 30 May 2010 (15 years ago). It is based on the Lynnfield (2009−2010) architecture. It features 4 cores and 8 threads. Base frequency is 2.93 GHz, with boost up to 3.6 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 45 nm process technology. Socket: LGA1156. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 3,177 points. Launch price was $486.

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Processing Power

The Core i5-6300U packs 2 cores / 4 threads, while the Core i7-875K offers 4 cores / 8 threads — the Core i7-875K has 2 more cores. Boost clocks reach 3 GHz on the Core i5-6300U versus 3.6 GHz on the Core i7-875K — a 18.2% clock advantage for the Core i7-875K (base: 2.4 GHz vs 2.93 GHz). The Core i5-6300U uses the Skylake (2015−2016) architecture (14 nm), while the Core i7-875K uses Lynnfield (2009−2010) (45 nm). In PassMark, the Core i5-6300U scores 3,207 against the Core i7-875K's 3,177 — a 0.9% lead for the Core i5-6300U. L3 cache: 3 MB on the Core i5-6300U vs 8 MB (total) on the Core i7-875K.

Feature	Core i5-6300U	Core i7-875K
Cores / Threads	2 / 4	4 / 8+100%
Boost Clock	3 GHz	3.6 GHz+20%
Base Clock	2.4 GHz	2.93 GHz+22%
L3 Cache	3 MB	8 MB (total)+167%
L2 Cache	512 kB+100%	256 kB (per core)
Process	14 nm-69%	45 nm
Architecture	Skylake (2015−2016)	Lynnfield (2009−2010)
PassMark	3,207	3,177
Geekbench 6 Single	967	—

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Memory & Platform

The Core i5-6300U uses the BGA1356 socket (PCIe 3.0), while the Core i7-875K uses LGA1156 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2133 on the Core i5-6300U versus DDR3-1333 on the Core i7-875K — the Core i5-6300U supports 60% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-6300U supports up to 32 GB of RAM compared to 16 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 12 (Core i5-6300U) vs 16 (Core i7-875K) — the Core i7-875K offers 4 more lanes for additional GPUs or NVMe drives.

Feature	Core i5-6300U	Core i7-875K
Socket	BGA1356	LGA1156
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR4-2133+60%	DDR3-1333
Max RAM Capacity	32 GB+100%	16 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	12	16+33%

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Advanced Features

Only the Core i7-875K has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: VT-x, VT-d, EPT (Core i5-6300U) vs VT-x (Core i7-875K). The Core i5-6300U includes integrated graphics (HD Graphics 520), while the Core i7-875K requires a dedicated GPU. Primary use case: Core i5-6300U targets Mainstream Laptop, Core i7-875K targets Desktop. Direct competitor: Core i5-6300U rivals PRO A12-9800B.