Core i9-11900KF vs Core 2 Quad Q8400

VS

Aggregate performance score

Core 2 Quad Q8400
2009
4 cores / 4 threads, 95 Watt
1.31
Core i9-11900KF
2021
8 cores / 16 threads, 125 Watt
15.80
+1106%

Core i9-11900KF outperforms Core 2 Quad Q8400 by a whopping 1106% based on our aggregate benchmark results.

Primary details

Comparing Core 2 Quad Q8400 and Core i9-11900KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking2266426
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorDesktop processor
Power efficiency1.3011.91
Architecture codenameYorkfield (2007−2009)Rocket Lake (2021)
Release date19 April 2009 (15 years ago)16 March 2021 (3 years ago)

Detailed specifications

Core 2 Quad Q8400 and Core i9-11900KF basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores4 (Quad-Core)8 (Octa-Core)
Threads416
Base clock speed2.66 GHz3.5 GHz
Boost clock speed0.67 GHz5.2 GHz
Bus rate1333 MHz8 GT/s
L1 cache64 KB (per core)64K (per core)
L2 cache4 MB (shared)256K (per core)
L3 cache0 KB16 MB (shared)
Chip lithography45 nm14 nm
Die size2x 82 mm2no data
Maximum core temperatureno data100 °C
Maximum case temperature (TCase)71 °C72 °C
Number of transistors456 millionno data
64 bit support++
Windows 11 compatibility-+
Unlocked multiplier-+
VID voltage range0.85V-1.3625Vno data

Compatibility

Information on Core 2 Quad Q8400 and Core i9-11900KF compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration11
SocketFCLGA775,LGA775FCLGA1200
Power consumption (TDP)95 Watt125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q8400 and Core i9-11900KF. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI-+
AVX-+
Enhanced SpeedStep (EIST)++
Turbo Boost Technology-2.0
Hyper-Threading Technology-+
TSX-+
Idle States++
Thermal Monitoring++
Demand Based Switching-no data
Turbo Boost Max 3.0no data+
FSB parity-no data
Deep Learning Boost-+

Security technologies

Core 2 Quad Q8400 and Core i9-11900KF technologies aimed at improving security, for example, by protecting against hacks.

TXT-+
EDB++
Secure Keyno data+
Identity Protection-+
SGXno data-
OS Guardno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q8400 and Core i9-11900KF are enumerated here.

VT-dno data+
VT-x++
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q8400 and Core i9-11900KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR1, DDR2, DDR3DDR4-3200
Maximum memory sizeno data128 GB
Max memory channelsno data2
Maximum memory bandwidthno data50 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardOn certain motherboards (Chipset feature)no data

Peripherals

Specifications and connection of peripherals supported by Core 2 Quad Q8400 and Core i9-11900KF.

PCIe version2.04.0
PCI Express lanesno data20

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Core 2 Quad Q8400 1.31
i9-11900KF 15.80
+1106%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Core 2 Quad Q8400 2067
i9-11900KF 24998
+1109%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Core 2 Quad Q8400 328
i9-11900KF 2328
+610%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Core 2 Quad Q8400 895
i9-11900KF 10039
+1022%

Gaming performance

Pros & cons summary


Performance score 1.31 15.80
Recency 19 April 2009 16 March 2021
Physical cores 4 8
Threads 4 16
Chip lithography 45 nm 14 nm
Power consumption (TDP) 95 Watt 125 Watt

Core 2 Quad Q8400 has 31.6% lower power consumption.

i9-11900KF, on the other hand, has a 1106.1% higher aggregate performance score, an age advantage of 11 years, 100% more physical cores and 300% more threads, and a 221.4% more advanced lithography process.

The Core i9-11900KF is our recommended choice as it beats the Core 2 Quad Q8400 in performance tests.


Should you still have questions on choice between Core 2 Quad Q8400 and Core i9-11900KF, ask them in Comments section, and we shall answer.

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Intel Core 2 Quad Q8400
Core 2 Quad Q8400
Intel Core i9-11900KF
Core i9-11900KF

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Community ratings

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Questions & comments

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