Intel Core i5-661 vs Intel Core i5-1235UL

Last updated:
cpumonkey @ x @cpumonkey

CPU comparison with benchmarks


Intel Core i5-661 CPU1 vs CPU2 Intel Core i5-1235UL
Intel Core i5-661 Intel Core i5-1235UL

CPU comparison

Intel Core i5-661 or Intel Core i5-1235UL - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.

The Intel Core i5-661 has 2 cores with 4 threads and clocks with a maximum frequency of 3.60 GHz. Up to 16 GB of memory is supported in 2 memory channels. The Intel Core i5-661 was released in Q1/2010.

The Intel Core i5-1235UL has 10 cores with 12 threads and clocks with a maximum frequency of 4.40 GHz. The CPU supports up to 64 GB of memory in 2 memory channels. The Intel Core i5-1235UL was released in Q3/2022.
Intel Core i5 (331) Family Intel Core i5 (331)
Intel Core i5 600 (6) CPU group Intel Core i 1200P/1200U (21)
1 Generation 12
Clarkdale Architecture Alder Lake U
Desktop / Server Segment Mobile
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Intel Core i5-661 has 2 CPU cores and can calculate 4 threads in parallel. The clock frequency of the Intel Core i5-661 is 3.33 GHz (3.60 GHz) while the Intel Core i5-1235UL has 10 CPU cores and 12 threads can calculate simultaneously. The clock frequency of the Intel Core i5-1235UL is at 2.50 GHz (4.40 GHz).
Intel Core i5-661 Characteristic Intel Core i5-1235UL
2 Cores 10
4 Threads 12
normal Core architecture hybrid (big.LITTLE)
Yes Hyperthreading Yes
No Overclocking ? No
3.33 GHz (3.60 GHz) A-Core 2.50 GHz (4.40 GHz)
2x Golden Cove
-- B-Core 0.90 GHz (3.30 GHz)
8x Gracemont

NPU AI performance

The performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors.
Intel Core i5-661 Characteristic Intel Core i5-1235UL
-- AI hardware --
-- AI specifications --
-- NPU + CPU + iGPU --

Integrated graphics (iGPU)

The Intel Core i5-661 or Intel Core i5-1235UL has integrated graphics, called iGPU for short. The iGPU uses the system's main memory as graphics memory and sits on the processor's die.
Intel HD Graphics (Westmere) GPU Intel Iris Xe Graphics 80 (Alder Lake)
0.50 GHz GPU frequency 0.35 GHz
0.90 GHz GPU (Turbo) 1.20 GHz
5 GPU Generation 13
32 nm Technology 10 nm
2 Max. displays 4
12 Compute units 80
24 Shader 640
No Hardware Raytracing No
No Frame Generation No
2 GB Max. GPU Memory 32 GB
10.1 DirectX Version 12.1

Hardware codec support

A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.
Intel HD Graphics (Westmere) GPU Intel Iris Xe Graphics 80 (Alder Lake)
No Codec h265 / HEVC (8 bit) Decode / Encode
No Codec h265 / HEVC (10 bit) Decode / Encode
Decode Codec h264 Decode / Encode
No Codec VP9 Decode / Encode
No Codec VP8 Decode
No Codec AV1 Decode
Decode Codec AVC Decode / Encode
No Codec VC-1 Decode
No Codec JPEG Decode / Encode

Memory & PCIe

The Intel Core i5-661 can use up to 16 GB of memory in 2 memory channels. The maximum memory bandwidth is 21.3 GB/s. The Intel Core i5-1235UL supports up to 64 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 76.8 GB/s.
Intel Core i5-661 Characteristic Intel Core i5-1235UL
DDR3-1066, DDR3-1333 Memory DDR5-4800, DDR4-3200
16 GB Max. Memory 64 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
21.3 GB/s Max. Bandwidth 76.8 GB/s
No ECC No
0.50 MB L2 Cache 6.50 MB
4.00 MB L3 Cache 12.00 MB
2.0 PCIe version 4.0
16 PCIe lanes 28
8.0 GB/s PCIe Bandwidth 55.1 GB/s

Thermal Management

The thermal design power (TDP for short) of the Intel Core i5-661 is 73 W, while the Intel Core i5-1235UL has a TDP of 15 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently.
Intel Core i5-661 Characteristic Intel Core i5-1235UL
73 W TDP (PL1 / PBP) 15 W
-- TDP (PL2) 55 W
-- TDP up 28 W
-- TDP down 12 W
-- Tjunction max. 100 °C

Technical details

The Intel Core i5-661 is manufactured in 32 nm and has 4.50 MB cache. The Intel Core i5-1235UL is manufactured in 10 nm and has a 18.50 MB cache.
Intel Core i5-661 Characteristic Intel Core i5-1235UL
32 nm Technology 10 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2 ISA extensions SSE4.1, SSE4.2, AVX2
LGA 1156 Socket BGA 1744
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Windows 10, Linux Operating systems Windows 10, Windows 11, Linux
Q1/2010 Release date Q3/2022
177 $ Release price --
show more data show more data


Rate these processors

Here you can rate the Intel Core i5-661 to help other visitors make their purchasing decisions. The average rating is 0 stars (0 ratings). Rate now:
Here you can rate the Intel Core i5-1235UL to help other visitors make their purchasing decisions. The average rating is 0 stars (0 ratings). Rate now:


iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
Intel Core i5-661 Intel Core i5-661
Intel HD Graphics (Westmere) @ 0.90 GHz
43 (3%)
Intel Core i5-1235UL Intel Core i5-1235UL
Intel Iris Xe Graphics 80 (Alder Lake) @ 1.20 GHz
1487 (100%)

Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i5-661 Intel Core i5-661
2C 4T @ 3.60 GHz
597 (100%)
Intel Core i5-1235UL Intel Core i5-1235UL
10C 12T @ 4.40 GHz
0 (0%)

Geekbench 5, 64bit (Multi-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i5-661 Intel Core i5-661
2C 4T @ 3.33 GHz
1308 (100%)
Intel Core i5-1235UL Intel Core i5-1235UL
10C 12T @ 3.10 GHz
0 (0%)

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
Intel Core i5-661 Intel Core i5-661
2C 4T @ 3.33 GHz
2359 (100%)
Intel Core i5-1235UL Intel Core i5-1235UL
10C 12T @ 3.10 GHz
0 (0%)

Devices using this processor
Intel Core i5-661 Intel Core i5-1235UL
Unknown Unknown

Popular comparisons containing this CPUs

1. Intel Core i5-1235UIntel Core i5-1235UL Intel Core i5-1235U vs Intel Core i5-1235UL
2. Intel Core i5-1135G7Intel Core i5-1235UL Intel Core i5-1135G7 vs Intel Core i5-1235UL
3. Intel Core i5-1235ULAMD Ryzen 5 5500 Intel Core i5-1235UL vs AMD Ryzen 5 5500
4. Qualcomm Snapdragon 865Intel Core i5-661 Qualcomm Snapdragon 865 vs Intel Core i5-661
5. Intel Core i5-1235ULAMD Ryzen 5 5625U Intel Core i5-1235UL vs AMD Ryzen 5 5625U
6. Intel Core i5-661Intel Core i3-540 Intel Core i5-661 vs Intel Core i3-540
7. AMD Ryzen 5 5500UIntel Core i5-1235UL AMD Ryzen 5 5500U vs Intel Core i5-1235UL
8. Intel Core i5-12500HIntel Core i5-1235UL Intel Core i5-12500H vs Intel Core i5-1235UL
9. Intel Core i5-12450HIntel Core i5-661 Intel Core i5-12450H vs Intel Core i5-661
10. Intel Core i5-12400Intel Core i5-1235UL Intel Core i5-12400 vs Intel Core i5-1235UL


back to index