Intel Core 2 Quad Q8400: specs and benchmarks

Price now 49$
Games supported 68%
Intel Core 2 Quad Q8400
Intel Core 2 Quad Q8400
  • Interface
  • Core clock speed
  • Max video memory
  • Memory type
  • Memory clock speed
  • Maximum resolution
Year of release 2009
Performance 2.28
Processor Technical data and tests
Intel Core 2 Quad Q8400
Intel Core 2 Quad Q8400 Intel Core 2 Quad Q8400


Intel started Intel Core 2 Quad Q8400 sales on April 2009. This is Yorkfield architecture desktop processor primarily aimed at office systems. It has 4 cores and 4 threads, and is based on 45 nm manufacturing technology, with a maximum frequency of 2666 MHz and a locked multiplier.

Compatibility-wise, this is LGA775 processor with a TDP of 95 Watt and a maximum temperature of 71 °C. It supports DDR1, DDR2, DDR3 memory.

It provides poor benchmark performance at


percent of a leader's which is AMD EPYC 7763.

General info

Of Core 2 Quad Q8400 processor market type (desktop or notebook), architecture, sales start time and pricing.

Place in performance rating1674
Value for money2.73
Market segmentDesktop processor
Architecture codenameYorkfield
Release dateApril 2009 (12 years ago)
Price now$49 of 14999 (Xeon Platinum 9282)
Value for money

To get the index we compare the characteristics of the processors and their cost, taking into account the cost of other processors.

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Technical specs

Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.

Physical cores4 (Quad-Core)
Base clock speed2.66 GHzof 4.7 (FX-9590)
Boost clock speed2.67 GHzof 5.3 (Core i9-10900KF)
L1 cache64K (per core)of 896 (Atom C3950)
L2 cache4 MB (shared)of 12 (Core 2 Quad Q9550)
Chip lithography45 nmof 5 (Apple M1)
Die size2x 81 mm2
Maximum core temperature71 °Cof 110 (Atom x7-E3950)
Maximum case temperature (TCase)71 °Cof 105 (Core i7-5557U)
Number of transistors456 millionof 16000 (Apple M1)
64 bit support+
Unlocked multiplier-
VID voltage range0.85V-1.3625V


Information on Core 2 Quad Q8400 compatibility with other computer components and devices: 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 configuration1of 8 (Opteron 842)
Thermal design power (TDP)95 Wattof 400 (Xeon Platinum 9282)

Technologies and extensions

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

Enhanced SpeedStep (EIST)+
Turbo Boost Technology-
Hyper-Threading Technology-
Idle States+
Thermal Monitoring+
Demand Based Switching-
FSB parity-

Security technologies

Processor technologies aimed at improving security, for example, by protecting against hacks.


Virtualization technologies

Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.


Memory specs

Types, maximum amount and channel number of RAM supported by Core 2 Quad Q8400's memory controller. Depending on the motherboard, higher memory frequency may be supported.

Supported memory typesDDR1, DDR2, DDR3of 4266 (Ryzen 9 4900H)

Benchmark performance

Single-core and multi-core benchmark results of Core 2 Quad Q8400. Overall benchmark performance is measured in points in 0-100 range, higher is better.

Overall 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 2.28
  • Passmark
  • 3DMark Fire Strike Physics

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 2003
Core 2 Quad Q8400 4290

Game benchmarks

Let's see how good Core 2 Quad Q8400 is for a gaming PC, compared with system requirements of some popular titles. Remember that sometimes official hardware requirements may reflect real performance inaccurately.

Relative perfomance

Overall Core 2 Quad Q8400 performance compared to nearest competitors among desktop CPUs.

AMD equivalent

We believe that the nearest equivalent to Core 2 Quad Q8400 from AMD is Athlon II X4 635, which is nearly equal in speed and higher by 1 position in our rating.

AMD Athlon II X4 635 Athlon II X4 635

Here are some closest AMD rivals to Core 2 Quad Q8400:

AMD A8-3820 100.88
Intel Core 2 Quad Q8400 100
AMD A6-3650 98.68

Similar processors

Here is our recommendation of several processors that are more or less close in performance to the one reviewed.

Intel Core 2 Quad Q9505 Core 2 Quad Q9505
AMD Athlon II X4 635 Athlon II X4 635
Intel Core 2 Quad Q6700 Core 2 Quad Q6700
Intel Core i5-655K Core i5 655K
AMD A8-3820 A8 3820
AMD Phenom II X4 910e Phenom II X4 910e

User rating

Here is the rating given to the reviewed processor by our users. Let others know your opinion by rating it yourself.

336 ratings
Intel Core 2 Quad Q8400
Intel Core 2 Quad Q8400

Advices and comments

Here you can ask a question about Core 2 Quad Q8400, agree or disagree with our judgements, or report an error or mismatch.