Intel Core i5-8400 vs Intel Core Ultra 7 155U

Compare Intel 8th Generation Core i5 6 core CPU vs Intel 12 core processor, specs and benchmark score. Which is the better CPU for gaming?

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Specifications
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Benchmark Score

Overall Score

A combined score of all workloads

3741 points

4819 points

28% slightly better overall score

Gaming Score

The raw gaming performance with a fast GPU

6024 points

7087 points

17% slightly better gaming score

Multitasking Score

Performance in workloads using up to 8 cores

3030 points

4161 points

37% slightly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

2906 points

4014 points

38% slightly better heavy workload score

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Other Benchmarks

Blender score

Cycles Render (Samples per minute)

77.12 points

94.95 points

23% slightly higher Blender score

Specifications

Cores

Number of physical processing units

100% significantly more cores

Threads

Number of logical processing units

133% significantly more threads

Clock Speed

Base frequency at which the chip operates

2.8 GHz

33% slightly higher clock speed

2.1 GHz

Turbo Speed

Higher frequency used for heavy workloads

4 GHz

4.8 GHz

20% slightly higher turbo speed

PCIe Lanes

Number of physical connections between the CPU and expansion slots

25% slightly more pcie lanes

Memory Channels

Lanes for simultaneous memory access

Identical

Supported Memory

Maximum amount of RAM supported by this CPU

128 GiB

33% slightly more supported memory

96 GiB

L2 Cache

Secondary embedded memory, slower than L1 cache

1.5 MiB

10 MiB

566% significantly more L2 cache

L3 Cache

General memory pool for all cores

9 MiB

12 MiB

33% slightly more L3 cache

Other details

Rank

Ranking in the hardwareDB database

456th of 1,089

364th of 1,089

Family

The product line

8th Generation Core i5

Core Ultra (Series 1)

Release date

The official date of release of this chip

2017 November

2023 November

Memory Type

The type of memory used by this chip

DDR4-2666

DDR5-7467

Is Unlocked

Can this CPU can be overclocked

Supports ECC memory

Does this CPU support error correcting memory

Core i5-8400 vs Core Ultra 7 155U specs and performance

According to the hardwareDB Benchmark tool, the Core Ultra 7 155U is faster than the Core i5-8400. Despite this, the Core i5-8400 has the advantage in our gaming benchmark.

With info from our database, we find that the Core Ultra 7 155U has significantly more cores with 12 cores whereas the Core i5-8400 has 6 cores. It also has more threads than the Core i5-8400. With our hardware info, we find that the Core i5-8400 has a slightly higher clock speed than the Core Ultra 7 155U. The info from our database shows that the Core Ultra 7 155U has more L2 cache than the Core i5-8400. The Core Ultra 7 155U also has slightly more L3 cache.

Modern CPUs generally have more logical cores than physical cores, this means that each core is split into multiple virtual cores, improving efficiency for parallel workloads. For instance, the Core i5-8400 has the same number of threads as cores. This means the the CPU does not support hyperthreading.