TurboVS
Intel Core 7 251E
Intel Core Ultra 7 265

Intel Core 7 251E Intel Core Ultra 7 265

Overview

Welcome to our detailed specification comparison between the Intel Core 7 251E and the Intel Core Ultra 7 265. Both processors share a 65W TDP and rely on big.LITTLE architecture, but they diverge in meaningful ways across CPU threading, cache size, integrated graphics performance, and memory speed. Whether you are building a multitasking workstation or a graphics-capable system, understanding where each chip excels will help you make the right choice. Read on as we break down every spec side by side.

Common Features

  • ✓ Both processors have integrated graphics.
  • ✓ Both processors have a Thermal Design Power (TDP) of 65W.
  • ✓ Both processors support PCI Express (PCIe) version 5.
  • ✓ Both processors support 64-bit computing.
  • ✓ Neither processor has an unlocked multiplier.
  • ✓ Both processors use big.LITTLE technology.
  • ✓ Both processors feature Turbo Boost version 2.
  • ✓ Both integrated graphics units have a base GPU clock speed of 300 MHz.
  • ✓ Both processors support DirectX 12.
  • ✓ Both processors support up to 4 displays simultaneously.
  • ✓ Both processors support OpenGL version 4.5.
  • ✓ Both processors support OpenCL version 3.
  • ✓ Both processors use DDR5 memory.
  • ✓ Both processors feature 2 memory channels.
  • ✓ Both processors support a maximum memory amount of 192GB.
  • ✓ Both processors support ECC memory.
  • ✓ Both processors share the same instruction sets: MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2.
  • ✓ Both processors have the NX bit security feature.

Main Differences

  • • CPU speed is 8 x 2.1 GHz and 16 x 1.6 GHz on Intel Core 7 251E, while it is 8 x 2.4 GHz and 12 x 1.8 GHz on Intel Core Ultra 7 265.
  • • CPU threads total 32 on Intel Core 7 251E and 20 on Intel Core Ultra 7 265.
  • • Turbo clock speed reaches 5.6 GHz on Intel Core 7 251E and 5.3 GHz on Intel Core Ultra 7 265.
  • • L3 cache is 36 MB on Intel Core 7 251E and 30 MB on Intel Core Ultra 7 265.
  • • GPU turbo clock speed is 1660 MHz on Intel Core 7 251E and 1950 MHz on Intel Core Ultra 7 265.
  • • Maximum RAM speed is 5600 MHz on Intel Core 7 251E and 6400 MHz on Intel Core Ultra 7 265.
Specs Comparison
Intel Core 7 251E

Intel Core 7 251E

Intel Core Ultra 7 265

Intel Core Ultra 7 265

General info:
Has integrated graphics ✓ ✓
release date January 2025 January 2025
Thermal Design Power (TDP) 65W 65W
PCI Express (PCIe) version 5 5
Supports 64-bit ✓ ✓

Looking at the general specifications for the Intel Core 7 251E and the Intel Core Ultra 7 265, the two processors are essentially identical across every metric in this group. Both carry a 65W TDP, support PCIe 5, include integrated graphics, and are fully 64-bit compatible.

The shared 65W thermal envelope means both chips place the same demands on cooling solutions and power delivery, making them interchangeable from a platform design standpoint. PCIe 5 support on both ensures compatibility with the latest high-bandwidth storage and discrete GPU options, so neither chip holds an advantage for forward-looking builds.

Based strictly on this group's data, these two processors are in a complete tie — there is no differentiating factor here. Users should look to other specification groups, such as core counts, clock speeds, or cache sizes, to find meaningful distinctions between these two chips.

Performance:
CPU speed 8 x 2.1 & 16 x 1.6 GHz 8 x 2.4 & 12 x 1.8 GHz
CPU threads 32 threads 20 threads
turbo clock speed 5.6GHz 5.3GHz
Has an unlocked multiplier ✕ ✕
L3 cache 36 MB 30 MB
Uses big.LITTLE technology ✓ ✓
Turbo Boost version 2 2

The Intel Core 7 251E and Intel Core Ultra 7 265 differ in several key performance aspects. The Core 7 251E has a CPU speed configuration of 8 cores running at 2.1 GHz and 16 threads running at 1.6 GHz, whereas the Core Ultra 7 265 has 8 cores running at 2.4 GHz and 12 threads running at 1.8 GHz. The Core 7 251E offers more threads (32 threads compared to 20 threads in the Core Ultra 7 265), which can help with multitasking and handling parallel workloads.

In terms of turbo clock speed, the Core 7 251E boosts up to 5.6 GHz, while the Core Ultra 7 265 reaches a slightly lower turbo speed of 5.3 GHz. Both processors have an unlocked multiplier, meaning neither of them supports manual overclocking.

For cache, the Core 7 251E comes with a larger L3 cache of 36 MB, whereas the Core Ultra 7 265 features a slightly smaller 30 MB L3 cache. Both processors utilize big.LITTLE technology and have the same version of Turbo Boost (version 2), ensuring dynamic performance adjustments under load.

Integrated graphics:
GPU clock speed 300 MHz 300 MHz
GPU turbo 1660 MHz 1950 MHz
DirectX version DirectX 12 DirectX 12
supported displays 4 4
OpenGL version 4.5 4.5
OpenCL version 3 3

Both the Intel Core 7 251E and Intel Core Ultra 7 265 come with integrated graphics, but there are some differences in performance. The GPU clock speed for both processors is 300 MHz, but the GPU turbo speeds differ. The Core 7 251E reaches a turbo speed of 1660 MHz, while the Core Ultra 7 265 can boost up to 1950 MHz, offering a higher potential for graphics performance in tasks that rely on GPU power.

Both processors support DirectX 12, OpenGL 4.5, and OpenCL 3, ensuring compatibility with modern graphics APIs and enabling smooth graphics rendering for a variety of applications.

Regarding display support, both processors can handle up to 4 displays, making them suitable for multi-monitor setups in productivity and light gaming environments.

Memory:
RAM speed (max) 5600 MHz 6400 MHz
DDR memory version 5 5
memory channels 2 2
maximum memory amount 192GB 192GB
Supports ECC memory ✓ ✓

The Intel Core 7 251E and Intel Core Ultra 7 265 both offer strong memory capabilities. Both processors support DDR5 memory with a maximum speed of 5600 MHz for the Core 7 251E and 6400 MHz for the Core Ultra 7 265, with the Ultra model providing faster memory speeds.

Both processors utilize two memory channels, which can help enhance memory bandwidth and overall system performance. They also support a maximum memory capacity of 192GB, allowing for large-scale memory configurations in high-demand tasks.

Additionally, both processors support ECC memory, which is beneficial for applications requiring high reliability and error correction, such as server environments or computational tasks that demand data integrity.

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 ✓ ✓

The Intel Core 7 251E and Intel Core Ultra 7 265 share identical features in terms of instruction sets. Both processors support the same set, including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2, providing a robust range of capabilities for handling various computing tasks and modern workloads.

Both processors also have the NX bit, which enhances security by preventing certain types of malicious code from executing in specific areas of memory.

Overall, in terms of features, there are no differences between the two processors, as they both offer the same set of instruction sets and security features.

Comparison Summary & Verdict

After examining all the specifications, both processors prove to be capable 65W chips with strong feature parity, yet each carves out a distinct advantage. The Intel Core 7 251E stands out with its higher thread count of 32, a larger 36 MB L3 cache, and a superior turbo clock speed of 5.6 GHz, making it a compelling choice for heavily threaded workloads and latency-sensitive tasks. The Intel Core Ultra 7 265, on the other hand, counters with a faster GPU turbo of 1950 MHz and support for 6400 MHz RAM, giving it an edge in graphics-intensive scenarios and memory-bandwidth-demanding applications. Choose the Core 7 251E for raw multi-threaded CPU throughput, and opt for the Core Ultra 7 265 when integrated graphics performance and memory speed are your top priorities.

Intel Core 7 251E
Buy Intel Core 7 251E if...

Choose the Intel Core 7 251E if you need maximum multi-threaded performance, benefiting from its 32 threads, larger 36 MB L3 cache, and higher 5.6 GHz turbo clock speed.

Intel Core Ultra 7 265
Buy Intel Core Ultra 7 265 if...

Choose the Intel Core Ultra 7 265 if integrated graphics performance and memory bandwidth matter most, as it delivers a faster 1950 MHz GPU turbo and supports up to 6400 MHz RAM.