Intel Core i5-1245UL vs Intel Core 2 Quad Q8400s

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CPU comparison with benchmarks


Intel Core i5-1245UL CPU1 vs CPU2 Intel Core 2 Quad Q8400s
Intel Core i5-1245UL Intel Core 2 Quad Q8400s

CPU comparison

Intel Core i5-1245UL or Intel Core 2 Quad Q8400s - 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 i5-1245UL has 10 cores with 12 threads and clocks with a maximum frequency of 4.40 GHz. Up to 64 GB of memory is supported in 4 memory channels. The Intel Core i5-1245UL was released in Q3/2022.

The Intel Core 2 Quad Q8400s has 4 cores with 4 threads and clocks with a maximum frequency of 2.66 GHz. The CPU supports up to 16 GB of memory in 2 memory channels. The Intel Core 2 Quad Q8400s was released in Q2/2009.
Intel Core i5 (331) Family Intel Core2 Quad (19)
Intel Core i 1200P/1200U (21) CPU group Intel Core 2 Quad Q8000/Q9000 (16)
12 Generation 2
Alder Lake U Architecture Yorkfield (Penryn)
Mobile Segment Desktop / Server
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Intel Core i5-1245UL has 10 CPU cores and can calculate 12 threads in parallel. The clock frequency of the Intel Core i5-1245UL is 2.50 GHz (4.40 GHz) while the Intel Core 2 Quad Q8400s has 4 CPU cores and 4 threads can calculate simultaneously. The clock frequency of the Intel Core 2 Quad Q8400s is at 2.66 GHz.

Intel Core i5-1245UL Characteristic Intel Core 2 Quad Q8400s
10 Cores 4
12 Threads 4
hybrid (big.LITTLE) Core architecture normal
Yes Hyperthreading No
No Overclocking ? No
2.50 GHz (4.40 GHz)
2x Golden Cove
A-Core 2.66 GHz
1.20 GHz (3.30 GHz)
8x Gracemont
B-Core --

Artificial Intelligence and Machine Learning

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor.

Intel Core i5-1245UL Characteristic Intel Core 2 Quad Q8400s
-- AI hardware --
-- AI specifications --

Internal Graphics

The Intel Core i5-1245UL or Intel Core 2 Quad Q8400s 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 Iris Xe Graphics 80 (Alder Lake) GPU no iGPU
0.35 GHz GPU frequency --
1.20 GHz GPU (Turbo) --
13 GPU Generation --
10 nm Technology
4 Max. displays
80 Compute units --
640 Shader --
No Hardware Raytracing No
No Frame Generation No
32 GB Max. GPU Memory --
12.1 DirectX Version --

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 Iris Xe Graphics 80 (Alder Lake) GPU no iGPU
Decode / Encode Codec h265 / HEVC (8 bit) No
Decode / Encode Codec h265 / HEVC (10 bit) No
Decode / Encode Codec h264 No
Decode / Encode Codec VP9 No
Decode Codec VP8 No
Decode Codec AV1 No
Decode / Encode Codec AVC No
Decode Codec VC-1 No
Decode / Encode Codec JPEG No

Memory & PCIe

The Intel Core i5-1245UL can use up to 64 GB of memory in 4 memory channels. The maximum memory bandwidth is 76.8 GB/s. The Intel Core 2 Quad Q8400s supports up to 16 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 17.1 GB/s.

Intel Core i5-1245UL Characteristic Intel Core 2 Quad Q8400s
DDR5-4800, DDR4-3200 Memory DDR3-1066, DDR2-800
64 GB Max. Memory 16 GB
4 (Quad Channel) Memory channels 2 (Dual Channel)
76.8 GB/s Max. Bandwidth 17.1 GB/s
No ECC No
6.50 MB L2 Cache 4.00 MB
12.00 MB L3 Cache --
4.0 PCIe version --
28 PCIe lanes --
55.1 GB/s PCIe Bandwidth --

Thermal Management

The thermal design power (TDP for short) of the Intel Core i5-1245UL is 15 W, while the Intel Core 2 Quad Q8400s has a TDP of 65 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently.

Intel Core i5-1245UL Characteristic Intel Core 2 Quad Q8400s
15 W TDP (PL1 / PBP) 65 W
55 W TDP (PL2) --
28 W TDP up --
12 W TDP down --
100 °C Tjunction max. --

Technical details

The Intel Core i5-1245UL is manufactured in 10 nm and has 18.50 MB cache. The Intel Core 2 Quad Q8400s is manufactured in 45 nm and has a 4.00 MB cache.

Intel Core i5-1245UL Characteristic Intel Core 2 Quad Q8400s
10 nm Technology 45 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2 ISA extensions MMX, SSE2, SSE3, SSE4.1
BGA 1744 Socket LGA 775
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-d
Yes AES-NI No
Windows 10, Windows 11, Linux Operating systems Windows 10, Linux
Q3/2022 Release date Q2/2009
-- Release price --
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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 i5-1245UL Intel Core i5-1245UL
Intel Iris Xe Graphics 80 (Alder Lake) @ 1.20 GHz
1487 (100%)
Intel Core 2 Quad Q8400s Intel Core 2 Quad Q8400s
@ 0.00 GHz
0 (0%)

Devices using this processor

Intel Core i5-1245UL Intel Core 2 Quad Q8400s
Unknown Unknown

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