TurboVS
Intel Core Ultra 3 205
Intel Core Ultra 5 245

Intel Core Ultra 3 205 Intel Core Ultra 5 245

Overview

Welcome to our in-depth spec comparison between the Intel Core Ultra 3 205 and the Intel Core Ultra 5 245, two desktop processors built on the same 3 nm architecture and LGA 1851 platform. While they share a strong common foundation, key battlegrounds emerge around core and thread counts, cache sizes, turbo clock speeds, and memory capabilities. Read on to see how these two chips stack up across every major specification.

Common Features

  • ✓ Both are Desktop type processors.
  • ✓ Both use the LGA 1851 CPU socket.
  • ✓ Integrated graphics are available on both processors.
  • ✓ Both are manufactured with a 3 nm semiconductor size.
  • ✓ Both support a maximum CPU temperature of 105 °C.
  • ✓ Both support PCIe version 5.
  • ✓ Both support 64-bit computing.
  • ✓ Neither processor has an unlocked multiplier.
  • ✓ Both use big.LITTLE technology.
  • ✓ Both feature Turbo Boost version 2.
  • ✓ The integrated GPU base clock speed is 300 MHz on both processors.
  • ✓ Both support DirectX version 12.
  • ✓ Both support up to 4 displays simultaneously.
  • ✓ Both support OpenGL version 4.5.
  • ✓ Both support OpenCL version 3.
  • ✓ Maximum RAM speed is 6400 MHz on both processors.
  • ✓ Both use DDR5 memory.
  • ✓ Both support dual memory channels.
  • ✓ Both support a maximum memory amount of 192 GB.
  • ✓ Both support the same instruction sets: MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2.
  • ✓ The NX bit security feature is available on both processors.

Main Differences

  • • CPU speed is 4 x 3.8 GHz & 4 x 3.2 GHz on Intel Core Ultra 3 205 and 6 x 3.5 GHz & 8 x 3 GHz on Intel Core Ultra 5 245.
  • • CPU threads count is 8 on Intel Core Ultra 3 205 and 14 on Intel Core Ultra 5 245.
  • • Turbo clock speed is 4.9 GHz on Intel Core Ultra 3 205 and 5.1 GHz on Intel Core Ultra 5 245.
  • • L2 cache is 16 MB on Intel Core Ultra 3 205 and 26 MB on Intel Core Ultra 5 245.
  • • Clock multiplier is 38 on Intel Core Ultra 3 205 and 35 on Intel Core Ultra 5 245.
  • • Integrated GPU turbo clock speed is 1800 MHz on Intel Core Ultra 3 205 and 1900 MHz on Intel Core Ultra 5 245.
  • • ECC memory support is available on Intel Core Ultra 5 245 but not on Intel Core Ultra 3 205.
Specs Comparison
Intel Core Ultra 3 205

Intel Core Ultra 3 205

Intel Core Ultra 5 245

Intel Core Ultra 5 245

General info:
Type Desktop Desktop
CPU socket LGA 1851 LGA 1851
Has integrated graphics ✓ ✓
release date January 2025 January 2025
semiconductor size 3 nm 3 nm
CPU temperature 105 °C 105 °C
PCI Express (PCIe) version 5 5
Supports 64-bit ✓ ✓

When comparing the general platform specs of the Intel Core Ultra 3 205 and Intel Core Ultra 5 245, the two processors are essentially identical across every listed attribute. Both are desktop CPUs sharing the same LGA 1851 socket, meaning they drop into the same motherboards — a significant practical advantage for builders or upgraders who want flexibility between tiers without changing platforms.

Both chips are built on a 3 nm semiconductor process, include integrated graphics, top out at a 105 °C thermal limit, support PCIe 5.0, and are fully 64-bit compatible. The shared PCIe 5.0 support is worth highlighting: it ensures both CPUs can take full advantage of next-generation GPUs and NVMe storage at maximum bandwidth, so neither chip creates a platform-level bottleneck.

Based strictly on the general info specs provided, these two processors are completely tied. There is no differentiator here — platform compatibility, fabrication node, thermals, and feature support are identical. Any meaningful distinction between the Ultra 3 205 and Ultra 5 245 will lie entirely in their performance-oriented specs, such as core counts, clock speeds, or cache — not in their general platform characteristics.

Performance:
CPU speed 4 x 3.8 & 4 x 3.2 GHz 6 x 3.5 & 8 x 3 GHz
CPU threads 8 threads 14 threads
turbo clock speed 4.9GHz 5.1GHz
Has an unlocked multiplier ✕ ✕
L2 cache 16 MB 26 MB
Uses big.LITTLE technology ✓ ✓
clock multiplier 38 35
Turbo Boost version 2 2

The Intel Core Ultra 3 205 and Intel Core Ultra 5 245 differ in their performance specifications across several key areas. The CPU speed for the Intel Core Ultra 3 205 is configured as 4 cores running at 3.8 GHz and 4 cores running at 3.2 GHz, while the Intel Core Ultra 5 245 offers 6 cores running at 3.5 GHz and 8 cores running at 3.0 GHz. This gives the Ultra 5 245 a higher core count overall, potentially enhancing its multitasking capabilities.

Both processors share the same Turbo Boost version (2), but the Ultra 5 245 has a slightly higher turbo clock speed of 5.1 GHz compared to the 4.9 GHz turbo clock speed of the Ultra 3 205. In terms of CPU threads, the Ultra 3 205 supports 8 threads, whereas the Ultra 5 245 supports 14 threads, which could contribute to better performance in multi-threaded applications.

For cache, the Ultra 5 245 has a larger L2 cache of 26 MB compared to the 16 MB in the Ultra 3 205. Both processors use big.LITTLE technology and have a locked multiplier, with the Ultra 3 205 having a clock multiplier of 38 and the Ultra 5 245 having a multiplier of 35. Despite differences in these specifications, both products utilize similar technologies, with the Ultra 5 245 generally offering more cores, higher cache, and more threads.

Integrated graphics:
GPU clock speed 300 MHz 300 MHz
GPU turbo 1800 MHz 1900 MHz
DirectX version DirectX 12 DirectX 12
supported displays 4 4
OpenGL version 4.5 4.5
OpenCL version 3 3

The Intel Core Ultra 3 205 and Intel Core Ultra 5 245 both feature integrated graphics with similar core specifications. Both processors have a GPU clock speed of 300 MHz and support a maximum of 4 displays. Additionally, both processors support DirectX 12, OpenGL version 4.5, and OpenCL version 3, offering compatibility with modern graphics and computational workloads.

However, the key difference between the two lies in the GPU turbo speed. The Ultra 3 205 features a GPU turbo speed of 1800 MHz, while the Ultra 5 245 is slightly higher at 1900 MHz. This difference could provide a marginal performance boost in GPU-intensive tasks on the Ultra 5 245.

Overall, while both processors offer very similar integrated graphics features, the Ultra 5 245 has a small advantage with its higher GPU turbo speed of 1900 MHz compared to the 1800 MHz of the Ultra 3 205.

Memory:
RAM speed (max) 6400 MHz 6400 MHz
DDR memory version 5 5
memory channels 2 2
maximum memory amount 192GB 192GB
Supports ECC memory ✕ ✓

The Intel Core Ultra 3 205 and Intel Core Ultra 5 245 share most of their memory specifications. Both processors support a maximum RAM speed of 6400 MHz, DDR memory version 5, and have 2 memory channels. They are also both capable of supporting up to 192 GB of total memory, providing substantial headroom for demanding applications.

The main difference between the two processors lies in their support for ECC (Error-Correcting Code) memory. The Intel Core Ultra 3 205 does not support ECC memory, while the Intel Core Ultra 5 245 does. ECC memory is typically used in environments where data integrity is critical, such as servers or workstations handling large datasets.

In summary, both processors offer similar memory capacities and speeds, but the Ultra 5 245 stands out with its support for ECC memory, which could be a deciding factor for users requiring higher data reliability.

Features:
instruction sets MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2 MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
Has NX bit ✓ ✓

Both the Intel Core Ultra 3 205 and Intel Core Ultra 5 245 share identical features in this group. Both processors support the same set of instruction sets, including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2, ensuring compatibility with a wide range of modern applications and workloads.

Additionally, both processors have the NX bit feature enabled, which enhances security by preventing certain types of attacks, such as buffer overflow exploits.

In summary, there are no differences between the Intel Core Ultra 3 205 and Intel Core Ultra 5 245 in terms of instruction sets or the presence of the NX bit, with both offering the same set of features.

Comparison Summary & Verdict

Both the Intel Core Ultra 3 205 and the Intel Core Ultra 5 245 share the same 3 nm platform, PCIe 5 support, DDR5 memory up to 192 GB, and an identical integrated graphics base clock, making either a solid modern desktop choice. However, the differences are meaningful: the Intel Core Ultra 5 245 pulls ahead with 14 threads versus 8, a higher 5.1 GHz turbo clock, a larger 26 MB L2 cache, and crucially, ECC memory support, making it the stronger pick for demanding workloads and professional or creative environments. The Intel Core Ultra 3 205, on the other hand, offers a higher base clock multiplier and is well-suited for everyday desktop use where maximum thread count is not a priority. Choose the 245 for power and reliability; choose the 205 for a capable, no-frills everyday desktop experience.

Intel Core Ultra 3 205
Buy Intel Core Ultra 3 205 if...

Buy the Intel Core Ultra 3 205 if you need a capable everyday desktop processor on the modern LGA 1851 platform and do not require high thread counts or ECC memory support.

Intel Core Ultra 5 245
Buy Intel Core Ultra 5 245 if...

Buy the Intel Core Ultra 5 245 if you need more processing threads, a faster turbo clock, a larger L2 cache, and ECC memory support for professional or more demanding workloads.