Core i3-6100T vs Core i7-6660U

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 i3-6100T vs Core i7-6660U 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 i3-6100T vs Core i7-6660U: Pros, Cons & Final Verdict

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

Core i3-6100T

2015

Why buy it

✅+0.4% higher PassMark.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with HD Graphics 530, while Core i7-6660U needs a discrete GPU.
✅Includes a boxed cooler (Stock), unlike Core i7-6660U.

Trade-offs

❌Smaller total L3 cache (3 MB vs 4 MB).
❌Launch MSRP is still $117 MSRP, while Core i7-6660U mostly shows up through inconsistent older-market listings.
❌133.3% higher power demand at 35W vs 15W.

Core i7-6660U

2016

Why buy it

✅+33.3% larger total L3 cache (4 MB vs 3 MB).
✅Draws 15W instead of 35W, a 20W reduction.

Trade-offs

❌Lower PassMark (3,628 vs 3,641).
❌No integrated graphics, while Core i3-6100T can still boot and troubleshoot without a discrete GPU.
❌No boxed cooler included, unlike Core i3-6100T.

Quick Answers

So, is Core i7-6660U better than Core i3-6100T?

It depends on what you want from the system. For gaming, Core i7-6660U is ahead with a 2.6% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i3-6100T pulls ahead with 0.4% better PassMark. Core i7-6660U also has the bigger cache pool with 33.3% larger total L3 cache (4 MB vs 3 MB).

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

For streaming, content creation, and heavier multitasking, Core i3-6100T is the stronger fit. You are getting 0.4% better PassMark, backed by 2 cores and 4 threads.

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

Core i7-6660U is still the much better call for a fresh build. Core i7-6660U comes in at an unclear MSRP at unclear MSRP versus $117 MSRP, and it still gives you a 2.6% average FPS lead across 50 shared CPU game tests in our data. Core i3-6100T only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2015 platform. Even with 100.0% better value on paper (31.1 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA1151.

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

Core i7-6660U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2016 vs 2015) and 33.3% larger total L3 cache (4 MB vs 3 MB). That makes it the safer long-term bet.

Core i3-6100T vs Core i7-6660U Technical Specifications

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

Core i3-6100T

The Core i3-6100T 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 3.2 GHz, with boost up to 3.2 GHz. L3 cache: 3 MB. L2 cache: 512 kB. Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 35 Watt. Memory support: DDR4-1866/2133, DDR3L-1333/1600. Passmark benchmark score: 3,641 points. Launch price was $117.

Core i7-6660U

The Core i7-6660U is manufactured by Intel. It was released in 20 March 2016 (9 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 3.4 GHz. L3 cache: 4 MB. L2 cache: 512 kB. Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR4-2133, LPDDR3-1866, DDR3L-1600. Passmark benchmark score: 3,628 points. Launch price was $415.

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Processing Power

Both the Core i3-6100T and Core i7-6660U share an identical 2-core/4-thread configuration. Boost clocks reach 3.2 GHz on the Core i3-6100T versus 3.4 GHz on the Core i7-6660U — a 6.1% clock advantage for the Core i7-6660U (base: 3.2 GHz vs 2.4 GHz). Both are built on the Skylake (2015−2016) architecture using a 14 nm process. In PassMark, the Core i3-6100T scores 3,641 against the Core i7-6660U's 3,628 — a 0.4% lead for the Core i3-6100T. L3 cache: 3 MB on the Core i3-6100T vs 4 MB on the Core i7-6660U.

Feature	Core i3-6100T	Core i7-6660U
Cores / Threads	2 / 4	2 / 4
Boost Clock	3.2 GHz	3.4 GHz+6%
Base Clock	3.2 GHz+33%	2.4 GHz
L3 Cache	3 MB	4 MB+33%
L2 Cache	512 kB	512 kB
Process	14 nm	14 nm
Architecture	Skylake (2015−2016)	Skylake (2015−2016)
PassMark	3,641	3,628
Cinebench R23 Multi	2,500	—
Geekbench 6 Single	1,041	—
Geekbench 6 Multi	2,071	—

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Memory & Platform

The Core i3-6100T uses the LGA1151 socket (PCIe 3.0), while the Core i7-6660U uses BGA1356 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i3-6100T	Core i7-6660U
Socket	LGA1151	BGA1356
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2133	—
Max RAM Capacity	64 GB	—
RAM Channels	2	—
ECC Support	Yes	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: VT-x, VT-d (Core i3-6100T) / not specified (Core i7-6660U). The Core i3-6100T includes integrated graphics (HD Graphics 530), while the Core i7-6660U requires a dedicated GPU. Primary use case: Core i3-6100T targets Budget.