Core i7-8665U vs Core 2 Duo T9400

VS

Aggregate performance score

Core 2 Duo T9400
2008
2 cores / 2 threads, 35 Watt
0.64
Core i7-8665U
2018
4 cores / 8 threads, 15 Watt
3.93
+514%

Core i7-8665U outperforms Core 2 Duo T9400 by a whopping 514% based on our aggregate benchmark results.

Primary details

Comparing Core 2 Duo T9400 and Core i7-8665U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking27761445
Place by popularitynot in top-100not in top-100
Market segmentLaptopLaptop
SeriesIntel Core 2 DuoIntel Core i7
Power efficiency1.7324.78
Architecture codenamePenryn (2008−2011)Whiskey Lake-U (2018−2019)
Release date15 July 2008 (16 years ago)1 October 2018 (6 years ago)
Launch price (MSRP)$316$409

Detailed specifications

Core 2 Duo T9400 and Core i7-8665U 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 cores2 (Dual-core)4 (Quad-Core)
Threads28
Base clock speed2.53 GHz1.9 GHz
Boost clock speed2.53 GHz4.8 GHz
Bus typeno dataOPI
Bus rate1066 MHz4 GT/s
Multiplierno data19
L1 cache128 KB64 KB (per core)
L2 cache6 MB256 KB (per core)
L3 cache6 MB L2 Cache8 MB (shared)
Chip lithography45 nm14 nm
Die size107 mm2no data
Maximum core temperature105 °C100 °C
Number of transistors410 Millionno data
64 bit support++
Windows 11 compatibility-+
VID voltage range1.05V-1.162Vno data

Compatibility

Information on Core 2 Duo T9400 and Core i7-8665U 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 configurationno data1 (Uniprocessor)
SocketBGA479,BGA956,PBGA479,PGA478FCBGA1528
Power consumption (TDP)35 Watt15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo T9400 and Core i7-8665U. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI-+
AVX-+
Enhanced SpeedStep (EIST)++
Speed Shiftno data+
My WiFino data+
Turbo Boost Technology-2.0
Hyper-Threading Technology-+
TSX-+
Idle States-+
Thermal Monitoring-+
Flex Memory Accessno data+
SIPP-+
Smart Responseno data+
Demand Based Switching-no data
FSB parity-no data

Security technologies

Core 2 Duo T9400 and Core i7-8665U technologies aimed at improving security, for example, by protecting against hacks.

TXT++
EDB++
Secure Keyno data+
MPX-+
Identity Protection-+
SGXno dataYes with Intel® ME
OS Guardno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo T9400 and Core i7-8665U are enumerated here.

AMD-V-+
VT-dno data+
VT-x++
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Duo T9400 and Core i7-8665U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesno dataDDR4
Maximum memory sizeno data64 GB
Max memory channelsno data2
Maximum memory bandwidthno data38.397 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataIntel UHD Graphics for 8th Generation Intel Processors
Max video memoryno data32 GB
Quick Sync Video-+
Clear Videono data+
Clear Video HDno data+
Graphics max frequencyno data1.15 GHz

Graphics interfaces

Available interfaces and connections of Core 2 Duo T9400 and Core i7-8665U integrated GPUs.

Number of displays supportedno data3
eDPno data+
DisplayPort-+
HDMI-+
DVIno data+

Graphics image quality

Maximum display resolutions supported by Core 2 Duo T9400 and Core i7-8665U integrated GPUs, including resolutions over different interfaces.

4K resolution supportno data+
Max resolution over HDMI 1.4no data4096 x 2304@24Hz
Max resolution over eDPno data4096 x 2304@60Hz
Max resolution over DisplayPortno data4096 x 2304@60Hz

Graphics API support

APIs supported by Core 2 Duo T9400 and Core i7-8665U integrated GPUs, sometimes API versions are included.

DirectXno data12
OpenGLno data4.5

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo T9400 and Core i7-8665U.

PCIe versionno data3.0
PCI Express lanesno data16

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 Duo T9400 0.64
i7-8665U 3.93
+514%

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 Duo T9400 1011
i7-8665U 6248
+518%

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 Duo T9400 322
i7-8665U 765
+138%

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 Duo T9400 510
i7-8665U 2425
+375%

Cinebench 10 32-bit single-core

Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.

Core 2 Duo T9400 2818
i7-8665U 6872
+144%

Cinebench 10 32-bit multi-core

Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.

Core 2 Duo T9400 5268
i7-8665U 18427
+250%

3DMark06 CPU

3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.

Core 2 Duo T9400 2304
i7-8665U 6365
+176%

wPrime 32

wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.

Core 2 Duo T9400 31
i7-8665U 9.98
+211%

Gaming performance

Pros & cons summary


Performance score 0.64 3.93
Recency 15 July 2008 1 October 2018
Physical cores 2 4
Threads 2 8
Chip lithography 45 nm 14 nm
Power consumption (TDP) 35 Watt 15 Watt

i7-8665U has a 514.1% higher aggregate performance score, an age advantage of 10 years, 100% more physical cores and 300% more threads, a 221.4% more advanced lithography process, and 133.3% lower power consumption.

The Core i7-8665U is our recommended choice as it beats the Core 2 Duo T9400 in performance tests.


Should you still have questions on choice between Core 2 Duo T9400 and Core i7-8665U, ask them in Comments section, and we shall answer.

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Intel Core 2 Duo T9400
Core 2 Duo T9400
Intel Core i7-8665U
Core i7-8665U

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Community ratings

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Questions & comments

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