Core i5-1155G7 vs Core i7-7740X

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 i5-1155G7 vs Core i7-7740X 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 i5-1155G7 vs Core i7-7740X: Pros, Cons & Final Verdict

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

Core i5-1155G7

2021

Why buy it

✅+0.1% higher PassMark.
✅Draws 28W instead of 112W, a 84W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-7740X across 50 shared CPU benchmark tests.

Core i7-7740X

2017

Why buy it

✅Better for gaming: +9.2% higher average FPS across 50 shared CPU benchmark tests.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (9,678 vs 9,686).
❌Launch MSRP is still $339 MSRP, while Core i5-1155G7 mostly shows up through inconsistent older-market listings.
❌300% higher power demand at 112W vs 28W.

Quick Answers

So, is Core i5-1155G7 better than Core i7-7740X?

It depends on what you want from the system. For gaming, Core i7-7740X is ahead with a 9.2% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i5-1155G7 pulls ahead with 0.1% better PassMark.

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

For streaming, content creation, and heavier multitasking, Core i5-1155G7 is the stronger fit. You are getting 0.1% better PassMark, backed by 4 cores and 8 threads.

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

Core i5-1155G7 is still the much better call for a fresh build. Core i5-1155G7 comes in at an unclear MSRP at unclear MSRP versus $339 MSRP, and it still gives you 0.1% better PassMark. Core i7-7740X only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2017 platform. Even with 100.0% better value on paper (28.5 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA2066.

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

Core i5-1155G7 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2021 vs 2017) and more multi-core headroom with 4 cores / 8 threads instead of 4/8. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core i5-1155G7 vs Core i7-7740X Technical Specifications

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

Core i5-1155G7

The Core i5-1155G7 is manufactured by Intel. It was released in 31 May 2021 (4 years ago). It is based on the Tiger Lake-UP3 (2020−2021) architecture. It features 4 cores and 8 threads. Base frequency is 2.5 GHz, with boost up to 4.5 GHz. L3 cache: 8 MB (total). L2 cache: 1.25 MB (per core). Built on 10 nm SuperFin process technology. Socket: FCBGA1449. Thermal design power (TDP): 28 Watt. Memory support: DDR4. Passmark benchmark score: 9,686 points. Launch price was $309.

Core i7-7740X

The Core i7-7740X is manufactured by Intel. It was released in 26 June 2017 (8 years ago). It is based on the Kaby Lake-X (2017) architecture. It features 4 cores and 8 threads. Base frequency is 4.3 GHz, with boost up to 4.5 GHz. L3 cache: 8 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA2066. Thermal design power (TDP): 112 Watt. Memory support: DDR4. Passmark benchmark score: 9,678 points. Launch price was $339.

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Processing Power

Both the Core i5-1155G7 and Core i7-7740X share an identical 4-core/8-thread configuration. Boost clocks reach 4.5 GHz on the Core i5-1155G7 versus 4.5 GHz on the Core i7-7740X — identical boost frequencies (base: 2.5 GHz vs 4.3 GHz). The Core i5-1155G7 uses the Tiger Lake-UP3 (2020−2021) architecture (10 nm SuperFin), while the Core i7-7740X uses Kaby Lake-X (2017) (14 nm). In PassMark, the Core i5-1155G7 scores 9,686 against the Core i7-7740X's 9,678 — a 0.1% lead for the Core i5-1155G7. Both processors carry 8 MB (total) of L3 cache.

Feature	Core i5-1155G7	Core i7-7740X
Cores / Threads	4 / 8	4 / 8
Boost Clock	4.5 GHz	4.5 GHz
Base Clock	2.5 GHz	4.3 GHz+72%
L3 Cache	8 MB (total)	8 MB (total)
L2 Cache	1.25 MB (per core)	256K (per core)+20380%
Process	10 nm SuperFin-29%	14 nm
Architecture	Tiger Lake-UP3 (2020−2021)	Kaby Lake-X (2017)
PassMark	9,686	9,678

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Memory & Platform

The Core i5-1155G7 uses the FCBGA1449 socket (PCIe 4.0), while the Core i7-7740X uses LGA2066 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i5-1155G7	Core i7-7740X
Socket	FCBGA1449	LGA2066
PCIe Generation	PCIe 4.0+33%	PCIe 3.0
Max RAM Speed	—	DDR4-2666
Max RAM Capacity	—	64 GB
RAM Channels	—	2
ECC Support	—	No
PCIe Lanes	—	16