PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.

Overview

The Core 2 Duo T6400 is manufactured by Intel. It was released in 2008-01-01. It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 2 MB L2 Cache. L2 cache: 2 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 2,115 points. Launch price was $249.

Value Upgrade Path

This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.

MSRP is the manufacturer's suggested retail price.•
Avg price is the current average price collected from markets across the web.

Performance Per Dollar

Based on actual market prices and performance synthetic scores.

FPS Benchmarks

Predicted performance for Core 2 Duo T6400 across popular games. Tested paired with RTX 4090 to isolate CPU performance.

Technical Analysis

Detailed breakdown of Core 2 Duo T6400 specifications and capabilities.

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Processing Power

The Core 2 Duo T6400 is a 2-core / 2-thread processor based on the Penryn (2008−2011) architecture, manufactured on a 45 nm process node. It reaches a maximum boost clock of 2 GHz from a base frequency of 2 GHz— higher boost clocks directly translate to better single-threaded performance and responsiveness in gaming. It carries 2 MB L2 Cache of L3 cache, plus 2 MB of L2 cache. In the PassMark benchmark (a comprehensive multi-threaded test), it scores 2,115, placing it in the Entry Level performance tier as a Legacy generation product. Geekbench 6 single-core (the most relevant metric for gaming FPS) records 650, while multi-core reaches 1,300.

Specification	Core 2 Duo T6400
Cores / ThreadsPhysical/logical processing units	2C / 2T
Max Boost ClockPeak single-core speed under boost	2 GHz
Base ClockGuaranteed minimum operating frequency	2 GHz
ArchitectureCPU microarchitecture design	Penryn (2008−2011)
Process NodeFabrication technology — smaller = more efficient	45 nm
L3 CacheShared cache — reduces memory latency for all cores	2 MB L2 Cache
L2 CachePer-core fast cache for frequently accessed data	2 MB
Bus SpeedData bus frequency	800 MHz
Max TemperatureMaximum safe operating temperature (Tjmax)	105 °C
64-bit Support	Yes
Windows 11 Compatible	No
Core Voltage Range	1V-1.25V
PassMark ScoreOverall multi-threaded benchmark score	2,115
Geekbench 6 SingleSingle-core performance — most relevant for gaming	650
Geekbench 6 MultiMulti-core parallel workload performance	1,300

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Memory & Platform

The Core 2 Duo T6400 fits into the PGA478 socket and supports PCIe 1.1 with 0 total PCIe lanes for expansion cards and storage.

Specification	Core 2 Duo T6400
TypeDesktop or Laptop processor	Laptop
SeriesProduct family	Intel Core 2 Duo
SocketMotherboard socket required	PGA478
PCIe GenerationPeripheral interconnect speed — affects GPU and SSD bandwidth	PCIe 1.1
PCIe LanesTotal available lanes for GPUs, NVMe drives, and expansion	0
Max RAM SpeedMaximum officially supported memory frequency	DDR2-800
Max RAM CapacityMaximum installable memory	8 GB
RAM ChannelsDual-channel doubles bandwidth vs single-channel	2
ECC SupportError-Correcting Code memory — prevents data corruption	No
Integrated GPUBuilt-in graphics processor	No
Compatible ChipsetsMotherboard chipsets that support this CPU	Intel GM45,Intel PM45

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Advanced Features

The Core 2 Duo T6400 is primarily designed for Mobile. Virtualization: No — enables running virtual machines efficiently (important for development and server workloads).

Specification	Core 2 Duo T6400
Primary Use CaseIntended workload category	Mobile
OverclockingWhether CPU clock can be manually increased	🔒 Locked
AVX-512Advanced vector instructions for AI/ML workloads	❌ Not Supported
VirtualizationHardware-assisted virtualization technology	No

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Power & Cooling

The Core 2 Duo T6400 has a rated TDP (Thermal Design Power) of 35 Watt — this indicates the amount of heat generated under sustained load and determines what cooling solution is needed. No stock cooler is included — you will need to purchase an aftermarket cooler separately. Recommended cooling: false.

Specification	Core 2 Duo T6400
TDPThermal Design Power — heat output under sustained workload	35 Watt
Max TemperatureMaximum safe junction temperature (Tjmax)	105 °C
Included CoolerStock cooler bundled in the box	No
Recommended CoolerSuggested aftermarket cooling solution	false

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Value Analysis

Performance ranking position: #3218 out of all indexed processors.

Specification	Core 2 Duo T6400
Launch PriceOriginal retail price at launch	$249
Performance RankPosition in overall performance ranking	#3218
Release DateLaunch date	2008-01-01
Release Year	2009
DesignerArchitecture designer (e.g. Intel, AMD)	Intel

Specifications Reference

Raw spec sheet for quick lookup. The analysis cards above explain what these fields mean in practice.

3 categories

General Information

7 specs

Type	Laptop
Series	Intel Core 2 Duo
Designer	Intel
Launch Price	$249
Release Date	2008-01-01
Architecture Codename	Penryn (2008−2011)
Performance Ranking Position	3218

Technical Specifications

12 specs

Cores	2
Threads	2
L2 Cache	2 MB
L3 Cache	2 MB L2 Cache
Bus Speed	800 MHz
Max Frequency	2 GHz
64-Bit Support	+
Base Frequency	2 GHz
Process Technology	45 nm
Allowed Core Voltage	1V-1.25V
Max Core Temperature	105 °C
Windows 11 Compatible	-