Core i5-660 vs Core i5-4350U

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 i5-660 vs Core i5-4350U 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 i5-660 vs Core i5-4350U: Pros, Cons & Final Verdict

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

Core i5-660

2010

Why buy it

✅+33.3% larger total L3 cache (4 MB vs 3 MB).
✅Draws 73W instead of 512W, a 439W reduction.

Trade-offs

❌Launch MSRP is still $196 MSRP, while Core i5-4350U mostly shows up through inconsistent older-market listings.

Core i5-4350U

2013

Why buy it

Trade-offs

❌Lower PassMark (2,425 vs 2,439).
❌Smaller total L3 cache (3 MB vs 4 MB).
❌601.4% higher power demand at 512W vs 73W.

Quick Answers

So, is Core i5-660 better than Core i5-4350U?

Yes. Core i5-660 is the better all-around CPU here. It gives you a 1.1% average FPS lead across 50 shared CPU game tests in our data and 0.6% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core i5-660 is the better pick. According to our tests, it delivers 1.1% 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 i5-660 is the stronger fit. You are getting 0.6% better PassMark, backed by 2 cores and 4 threads. It also has the larger cache pool with 33.3% larger total L3 cache (4 MB vs 3 MB).

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

Core i5-660 is the better buy right now. Core i5-660 comes in at an unclear MSRP at $196 MSRP versus unclear MSRP, and it still gives you a 1.1% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (12.4 vs 0.0 PassMark/$), 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 i5-4350U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2013 vs 2010). That makes it the safer long-term bet.

Core i5-660 vs Core i5-4350U Technical Specifications

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

Core i5-660

The Core i5-660 is manufactured by Intel. It was released in 7 January 2010 (15 years ago). It is based on the Clarkdale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 3.33 GHz, with boost up to 3.6 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1156. Thermal design power (TDP): 73 Watt. Memory support: DDR3. Passmark benchmark score: 2,439 points. Launch price was $70.

Core i5-4350U

The Core i5-4350U is manufactured by Intel. It was released in 4 June 2013 (12 years ago). It is based on the Haswell (2013−2015) architecture. It features 2 cores and 4 threads. Base frequency is 1.4 GHz, with boost up to 2.9 GHz. L3 cache: 3 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 15 Watt. Memory support: DDR3. Passmark benchmark score: 2,425 points. Launch price was $342.

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Processing Power

Both the Core i5-660 and Core i5-4350U share an identical 2-core/4-thread configuration. Boost clocks reach 3.6 GHz on the Core i5-660 versus 2.9 GHz on the Core i5-4350U — a 21.5% clock advantage for the Core i5-660 (base: 3.33 GHz vs 1.4 GHz). The Core i5-660 uses the Clarkdale (2010−2011) architecture (32 nm), while the Core i5-4350U uses Haswell (2013−2015) (22 nm). In PassMark, the Core i5-660 scores 2,439 against the Core i5-4350U's 2,425 — a 0.6% lead for the Core i5-660. L3 cache: 4 MB (total) on the Core i5-660 vs 3 MB (total) on the Core i5-4350U.

Feature	Core i5-660	Core i5-4350U
Cores / Threads	2 / 4	2 / 4
Boost Clock	3.6 GHz+24%	2.9 GHz
Base Clock	3.33 GHz+138%	1.4 GHz
L3 Cache	4 MB (total)+33%	3 MB (total)
L2 Cache	256 kB (per core)	256K (per core)
Process	32 nm	22 nm-31%
Architecture	Clarkdale (2010−2011)	Haswell (2013−2015)
PassMark	2,439	2,425

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Memory & Platform

The Core i5-660 uses the LGA1156 socket (PCIe 2.0), while the Core i5-4350U uses FCBGA1168 (PCIe 3.0) — making them incompatible on the same motherboard.