CPU Comparison
Core i5-1235U (IPU) vs Intel Core i7-1255U
A side-by-side comparison of specs, performance and value. The Intel Core i5-1235U is a mobile processor that represents a fascinating blend of performance and efficiency, tailored for thin-and-light laptops and specialized business environments. Launched in early 2022, it utilizes Intel's Alder Lake-U architecture, bringing a hybrid design to the mobile space. What sets this specific SKU apart is the inclusion of an Infrastructure Processing Unit (IPU), designed to offload infrastructure tasks like networking and security from the main CPU. With 10 total cores—comprising 2 Performance cores and 8 Efficient cores—and 12 processing threads, it handles multitasking with surprising agility. The chip operates at a base frequency of 1300 MHz on its P-cores and can boost up to 4.4 GHz under load. Its 15W default TDP makes it ideal for portable devices, ensuring long battery life while maintaining the processing grunt needed for modern office workloads and background data management.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Snappy performance in office applications and heavy multitasking.
Highly responsive for daily office tasks, with plenty of E-cores to keep background apps from slowing down the system.
Gaming
Capable of light gaming via Iris Xe 80EU, but not designed for AAA titles.
Can run esports games like League of Legends smoothly, but struggles with modern AAA titles on integrated graphics.
Virtualization
Excellent VM performance due to the dedicated IPU offloading network overhead.
Good for light Docker containers, but 2 P-cores limit performance when running full Windows VMs.
Efficiency
Outstanding power-to-performance ratio for all-day battery life.
Excellent power management ensures long battery life during typical office use.
Specialized Performance
AI / ML
- GNA 3.0 provides AI acceleration for audio and background blur
- No NPU
- AI workloads handled by CPU/GPU
Content Creation
Gaming
- Iris Xe 80EU handles eSports titles well
- Not suitable for modern AAA gaming without low settings
- Iris Xe 96EU handles 1080p low settings for older games
- Throttles under sustained 3D loads
- Best paired with a discrete GPU for serious gaming
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Includes an Infrastructure Processing Unit (IPU)
- Excellent hybrid core efficiency (2P + 8E)
- Supports modern DDR5 memory
- 20 PCIe 4.0 lanes
- Great battery life potential
Cons
- Overkill for standard home users
- Integrated graphics not for heavy gaming
- Soldered to motherboard (BGA)
- Locked multiplier
Pros
- Excellent performance-per-watt
- Very flexible memory support
- Good single-core burst performance
- Plenty of PCIe lanes for an ultrabook chip
- Reliable Iris Xe integrated graphics
Cons
- Only 2 P-cores limit heavy multi-threading
- Soldered to the motherboard
- Can get warm during 55W turbo bursts
- Not suitable for gaming without a discrete GPU
Competitors & Alternatives
Core i5-1235U (IPU)
- AMD Ryzen 5 5600URival
Mobile
- AMD Ryzen 7 5800URival
Mobile
- Compare head-to-headIntel Core i7-1255URival
Mobile
- Intel Core i5-1245URival
Mobile
- Compare head-to-headApple M1Rival
Mobile
More P-cores for better sustained performance.
Compare head-to-headBetter integrated graphics and clock speeds.
Compare head-to-head- AMD Ryzen 5 5625UAlt
Refreshed Zen 3 architecture with solid efficiency.
- Intel Core i5-1230UAlt
Lower TDP variant for fanless designs.
Budget-friendly alternative for basic office work.
Compare head-to-head
Intel Core i7-1255U
- AMD Ryzen 7 7730URival
Mobile
- AMD Ryzen 7 6800URival
Mobile
- Compare head-to-headApple M2Rival
Mobile
- AMD Ryzen 5 6600URival
Mobile
- Intel Core i7-1185G7Rival
Mobile
Offers slightly higher clock speeds (4.8 GHz) for marginally better burst performance.
Compare head-to-headA more cost-effective alternative that offers very similar everyday performance.
Compare head-to-headBetter sustained performance if you can accommodate the 28W TDP.
Compare head-to-head- AMD Ryzen 7 7735UAlt
Strong alternative with better integrated graphics efficiency.
- Intel Core i7-1355UAlt
The 13th Gen successor with refined efficiency and clock speeds.
Our Verdict on Each
A unique Alder Lake chip that combines excellent efficiency with an IPU for specialized enterprise workloads.
Best for: Enterprise thin-and-light laptops
Read the full reviewA highly efficient and popular 15W processor that powers a vast majority of mid-range premium ultrabooks, offering great daily responsiveness.
Best for: Buying a standard ultrabook for school or office work where you need strong battery life and snappy daily performance.
Read the full reviewFrequently Asked Questions
Which is better, Core i5-1235U (IPU) or Intel Core i7-1255U?
Based on our editorial ratings, the Core i5-1235U (IPU) 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 i5-1235U (IPU) or Intel Core i7-1255U?
For gaming, the Intel Core i7-1255U leads with a gaming performance score of 64/100 among Core i5-1235U (IPU) and Intel Core i7-1255U.
Which uses less power?
The Core i5-1235U (IPU) has the lowest rated TDP. Power draw across these chips: Core i5-1235U (IPU) (15 W), Intel Core i7-1255U (55 W).
Do Core i5-1235U (IPU) and Intel Core i7-1255U use the same socket?
Yes — all of these CPUs use the Intel BGA 1744 socket, so they share compatible motherboards.