CPU Comparison
Core i7-5550U vs Intel Core i7-8559U
A side-by-side comparison of specs, performance and value. The Intel Core i7-5550U is a specialized low-power mobile processor released in 2015, positioned for premium ultrabooks requiring enhanced graphical capabilities in a thin form factor. Part of the 14nm Broadwell-U architecture, it features two cores and four threads. Unlike standard U-series chips, the 5550U integrates Intel HD Graphics 6000, boasting 48 execution units for significantly better rendering performance. It operates at a base clock of 2.0 GHz and boosts up to 3.0 GHz, utilizing a 15-watt configurable TDP. The processor is built on a larger 133 mm² die housing 1.9 billion transistors to accommodate the beefier graphics array. While end-of-life, the i7-5550U represented an interesting tier in Intel's lineup, offering a middle ground between basic integrated graphics and high-end Iris Pro solutions. It was tailored for professionals needing efficient media processing and light 3D rendering on the go truly impressive indeed.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Adequate for basic tasks but dual-core limits heavy workloads.
High clock speeds ensure excellent performance in office and creative apps.
Gaming
Better than HD 5500, but still only suitable for old or light games.
Iris Plus 655 allows for playable frame rates in older or well-optimized games.
Virtualization
Not recommended for VMs.
Capable of running light VMs, though limited by 4 cores.
Efficiency
Good efficiency, though the larger GPU increases idle power slightly.
28W TDP is efficient enough for laptops but warmer than 15W parts.
Specialized Performance
AI / ML
- No AI acceleration hardware
- Limited by dual-core CPU
- No dedicated AI hardware
- eDRAM can be utilized for certain compute workloads
Content Creation
Gaming
- Can handle older games at 720p
- HD 6000 is a step up but still weak
- Not for modern AAA gaming
- Iris Plus 655 is a major step up from UHD 620
- eDRAM helps with texture loading
- Can run macOS games smoothly
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Better integrated graphics than standard U-series
- Low 15W TDP
- Supports faster 1866 MT/s DDR3
- Good for media playback
Cons
- Only 2 cores
- Outdated DDR3 memory
- Weak for modern multitasking
- Soldered to motherboard
- Short market lifespan
Pros
- High 4.5 GHz boost clock
- Iris Plus Graphics with 128MB eDRAM
- 28W TDP allows good sustained performance
- Excellent single-core speed
Cons
- Runs warmer than 15W U-series chips
- Soldered to motherboard
- 14nm process is outdated
- Limited to older platforms
Competitors & Alternatives
Core i7-5550U
- AMD A10-7300Rival
Mobile APU
- Intel Core i7-5500URival
Mobile Thin & Light
- Compare head-to-headIntel Core i5-5250URival
Mobile Thin & Light
- Intel Core i7-6560UAlt
Skylake successor with Iris graphics and DDR4.
- AMD Ryzen 5 5500UAlt
Modern 6-core alternative with Vega graphics.
- Alt
Massive leap in efficiency and graphics performance.
Compare head-to-head Modern 10nm alternative with Iris Plus graphics.
Compare head-to-headCoffee Lake-U with Iris Plus and much higher performance.
Compare head-to-head
Intel Core i7-8559U
- AMD Ryzen 7 2700URival
Mobile
- Compare head-to-headIntel Core i7-8550URival
Mobile
- AMD Ryzen 7 3750HRival
Mobile
- Intel Core i5-8259URival
Mobile
- Apple A12X BionicRival
Mobile
- Alt
Vastly superior performance and efficiency for Mac users.
Compare head-to-head 10th Gen successor with 10nm process and better IPC.
Compare head-to-head- AMD Ryzen 7 4800UAlt
Much better multi-core performance in a similar power bracket.
- Intel Core i7-8665UAlt
Whiskey Lake alternative for business PCs.
- Alt
The modern standard for compact Mac desktops and laptops.
Compare head-to-head
Our Verdict on Each
A unique Broadwell-U chip that prioritized integrated graphics performance, making it suitable for light creative work in thin laptops.
Best for: Buying a used premium ultrabook for basic media consumption.
Read the full reviewA premium 28W mobile processor that combined high clock speeds with powerful Iris Plus graphics, delivering an excellent balance of CPU and GPU performance.
Best for: If you are considering a laptop with the Intel Core i7-8559U, you are likely looking at a used MacBook Pro or a premium NUC. This processor remains highly capable for everyday productivity, programming, and light 1080p video editing. The inclusion of Iris Plus graphics with eDRAM provides a noticeable boost in graphical tasks compared to standard U-series chips. It is an excellent choice for users who need a compact, moderately powerful machine without paying the premium for Apple Silicon. However, be aware that it is an Intel-based Mac, meaning it will eventually lose macOS support. Avoid this processor if you need to run modern AAA games or heavy 3D rendering workloads. It is best purchased at a discount for general use and legacy software.
Read the full reviewFrequently Asked Questions
Which is better, Core i7-5550U or Intel Core i7-8559U?
Based on our editorial ratings, the Intel Core i7-8559U comes out ahead with a score of 8.5/10. That said, the best choice depends on your workload — check the spec and performance breakdown above for gaming, productivity and efficiency differences.
Which is faster for gaming, Core i7-5550U or Intel Core i7-8559U?
For gaming, the Intel Core i7-8559U leads with a gaming performance score of 55/100 among Core i7-5550U and Intel Core i7-8559U.
Which uses less power?
The Core i7-5550U has the lowest rated TDP. Power draw across these chips: Core i7-5550U (15 W), Intel Core i7-8559U (28 W).
Do Core i7-5550U and Intel Core i7-8559U use the same socket?
No. They use different sockets (Core i7-5550U: Intel BGA 1168, Intel Core i7-8559U: Intel BGA 1356), so each needs a compatible motherboard.
Which has more cores?
The Intel Core i7-8559U has the most cores. Core counts: Core i7-5550U (2 cores), Intel Core i7-8559U (4 cores).