Core i7-5557U vs FX-770K

Core i7-5557U vs FX-770K Performance Spectrum

Core i7-5557U

2 / 4

3,153

0.0%

3,172

+0.6%

Ryzen Threadripper 3990X

About PassMark

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 i7-5557U vs FX-770K 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 i7-5557U vs FX-770K: Pros, Cons & Final Verdict

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

Core i7-5557U

2015

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than FX-770K across 50 shared CPU benchmark tests.
❌Lower PassMark (3,153 vs 3,172).
❌687.7% higher power demand at 512W vs 65W.

FX-770K

2014

Why buy it

✅Better for gaming: +5.7% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 65W instead of 512W, a 447W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is FX-770K better than Core i7-5557U?

Yes. FX-770K is the better all-around CPU here. It gives you a 5.7% 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, FX-770K is the better pick. According to our tests, it delivers 5.7% 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, FX-770K is the stronger fit. You are getting 0.6% better PassMark, backed by 4 cores and 4 threads.

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

FX-770K still makes the most sense overall. FX-770K comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 5.7% average FPS lead across 50 shared CPU game tests in our data.

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

Core i7-5557U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2014). That makes it the safer long-term bet.

Core i7-5557U vs FX-770K Technical Specifications

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

Core i7-5557U

The Core i7-5557U is manufactured by Intel. It was released in 1 March 2015 (10 years ago). It is based on the Broadwell-U (2015) architecture. It features 2 cores and 4 threads. Base frequency is 3.1 GHz, with boost up to 3.4 GHz. L3 cache: 4 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 28 Watt. Memory support: DDR3. Passmark benchmark score: 3,153 points. Launch price was $426.

FX-770K

The FX-770K is manufactured by AMD. It was released in Dezembro 2014 (11 years ago). It is based on the Kaveri (2014−2015) architecture. It features 4 cores and 4 threads. Base frequency is 3.5 GHz, with boost up to 3.9 GHz. L2 cache: 4 MB. Built on 28 nm process technology. Socket: FM2+. Thermal design power (TDP): 65 Watt. Memory support: DDR3-2133. Passmark benchmark score: 3,172 points. Launch price was $69.

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Processing Power

The Core i7-5557U packs 2 cores / 4 threads, while the FX-770K offers 4 cores / 4 threads — the FX-770K has 2 more cores. Boost clocks reach 3.4 GHz on the Core i7-5557U versus 3.9 GHz on the FX-770K — a 13.7% clock advantage for the FX-770K (base: 3.1 GHz vs 3.5 GHz). The Core i7-5557U uses the Broadwell-U (2015) architecture (14 nm), while the FX-770K uses Kaveri (2014−2015) (28 nm). In PassMark, the Core i7-5557U scores 3,153 against the FX-770K's 3,172 — a 0.6% lead for the FX-770K.

Feature	Core i7-5557U	FX-770K
Cores / Threads	2 / 4	4 / 4+100%
Boost Clock	3.4 GHz	3.9 GHz+15%
Base Clock	3.1 GHz	3.5 GHz+13%
L3 Cache	4 MB (total)	—
L2 Cache	256K (per core)+6300%	4 MB
Process	14 nm-50%	28 nm
Architecture	Broadwell-U (2015)	Kaveri (2014−2015)
PassMark	3,153	3,172

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Memory & Platform

The Core i7-5557U uses the FCBGA1168 socket (PCIe 3.0), while the FX-770K uses FM2+ (PCIe 3.0) — making them incompatible on the same motherboard.