Average Bench: 44.6% (899th of 1404)

Based on 18,432 user benchmarks.  Devices: BFEBFBFF0001067A, , 0000000000000000, 00050400000607D0, 1FABFBFF0001067A Model: Intel(R) Core(TM)2 Quad CPU Q8400 @ 2.66GHz
Poor: 31%Average: 44.6% Great: 52%
Gaming 45%
Speed boat
Desktop 46%
Workstation 31%
Sail boat

Below average average bench

The Intel Core2 Quad Q8400 averaged 55.3% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.


Avg. Memory Latency 64.1Pts
Avg. Single Core Speed 40Pts

Good consistency

The range of scores (95th - 5th percentile) for the Intel Core2 Quad Q8400 is 21.5%. This is a relatively narrow range which indicates that the Intel Core2 Quad Q8400 performs reasonably consistently under varying real world conditions.


Avg. Multi Core Speed 151Pts
Avg. Octa Core Speed 150Pts

Average Bench

(Based on 18,432 samples)
Min Avg Max
43.4 Memory 64.1 76.5
29.2 1-Core 40 47.6
52.8 2-Core 79.3 95.9
39.4% 61.1 Pts
Min Avg Max
78 4-Core 147 177
94.1 8-Core 150 173
19.9% 149 Pts
Min Avg Max
93.7 64-Core 151 176
9.3% 151 Pts
User Benchmarks Bench Normal Heavy Server
The fastest CPU (mainstream) averages a speed of 100%
LGA775, 1 CPU, 4 cores, 4 threads
Base clock 2.65 GHz, turbo 2.5 GHz (avg)
Memory 76.1
1-Core 39.5
2-Core 63.7
42% 59.8 Pts
4-Core 127
8-Core 138
18% 132 Pts
64-Core 159
10% 159 Pts
Socket 775, 1 CPU, 4 cores, 4 threads
Base clock 2.65 GHz, turbo 2.5 GHz (avg)
Memory 69.4
1-Core 42
2-Core 83.4
42% 64.9 Pts
4-Core 127
8-Core 145
18% 136 Pts
64-Core 145
9% 145 Pts
LGA775, 1 CPU, 4 cores, 4 threads
Base clock 3.15 GHz, turbo 3 GHz (avg)
Memory 64.6
1-Core 36.3
2-Core 96.3
41% 65.7 Pts
4-Core 141
8-Core 154
19% 147 Pts
64-Core 155
10% 155 Pts
Socket 775, 1 CPU, 4 cores, 4 threads
Base clock 2.65 GHz, turbo 2.5 GHz (avg)
Memory 63.8
1-Core 39.5
2-Core 77.3
39% 60.2 Pts
4-Core 130
8-Core 138
18% 134 Pts
64-Core 140
9% 140 Pts
Socket 775, 1 CPU, 4 cores, 4 threads
Base clock 2.65 GHz, turbo 2.5 GHz (avg)
Memory 58.8
1-Core 42
2-Core 83.3
39% 61.4 Pts
4-Core 150
8-Core 155
20% 153 Pts
64-Core 142
9% 142 Pts
XU1 PROCESSOR, 1 CPU, 4 cores, 4 threads
Base clock 2.65 GHz, turbo 2.45 GHz (avg)
Memory 59.3
1-Core 36.8
2-Core 82.3
37% 59.5 Pts
4-Core 128
8-Core 134
17% 131 Pts
64-Core 132
8% 132 Pts
LGA775, 1 CPU, 4 cores, 4 threads
Base clock 2.65 GHz, turbo 2.5 GHz (avg)
Memory 55.3
1-Core 37.5
2-Core 69
35% 53.9 Pts
4-Core 121
8-Core 145
17% 133 Pts
64-Core 158
10% 158 Pts
Socket 775, 1 CPU, 4 cores, 4 threads
Base clock 2.65 GHz, turbo 2.5 GHz (avg)
Memory 58.8
1-Core 30.1
2-Core 78.2
35% 55.7 Pts
4-Core 83.8
8-Core 117
13% 100 Pts
64-Core 142
9% 142 Pts
18,432 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 60,338,078 CPUs tested.


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Typical Core2 Quad Q8400 Builds (Compare 819 builds) See popular component choices, score breakdowns and rankings.
Gaming 5%
Tree trunk
Desktop 41%
Speed boat
Workstation 4%
Tree trunk

Motherboard: Asus P5G41T-M LX - $260

EDIT WITH CUSTOM PC BUILDER Value: 51% - Above average Total price: $427

Popular Core2 Quad Q8400 compatible motherboards:

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  • - RAM tests include: single/multi core bandwidth and latency.
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Processor Rankings (Price vs Performance) March 2023 CPU Rankings.

We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top CPUs. [CPUPro]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.



DescriptionIntel® Core™2 Quad Processor Q8400 (4M Cache, 2.66 GHz, 1333 MHz FSB)
Code NameYorkfield
Launch DateQ2'09
Processor NumberQ8400
# of Cores4
Cache4 MB L2
Instruction Set64-bit
Embedded Options AvailableNo
Lithography45 nm
VID Voltage Range0.8500V-1.3625V
Recommended Price$179.00
Clock Speed2.66 GHz
Bus Speed1333 MHz FSB
Max TDP95 W
FSB ParityNo

Data Protection

AES New InstructionsNo

Advanced Technologies

Virtualization Tech (VT-x)Yes
Intel 64Yes
Idle StatesYes
Enhanced Intel SpeedStep® TechYes
Thermal Monitoring TechnologiesYes
Turbo Boost TechNo
Hyper-Threading TechNo
Demand Based SwitchingNo


Package Size37.5mm x 37.5mm
Sockets SupportedLGA775
Processing Die Size164 mm2
# of Processing Die Transistors456 million

Platform Protection

Execute Disable BitYes
Trusted Execution TechNo


Added n/a ago.


4 months ago.

Best friend. Working many years perfect!


4 months ago.

This very old CPU is still more than enough to handle day to day spread sheets, word documents and other such workloads. Its only down fall is choppy google docs and windows (I have linux mint installed now). Its unfortunate we're forced to move on simply because MS Virus wants us to spend $1300 to run bloated software just to use a simple word processor.


18 months ago.

11 years of perfect working. Now playing even MAFIA III with it on low. Really fond of it. All my tasks and games runs quite good. In 2019 and so many years of stable working I like it. It was the my best choice in them days.


12 days ago.

i like this processor, enough for everyday computing activities, such as light video editing, office, and graphic design.


4 years ago.

I have it. After several years i can still work very smoothly


2 months ago.

Cheaper and more effective than some mobile or low power processors from today.


3 years ago.

Very nice for a cheap processor (10 eur). Works really nice.


3 years ago.

Very old CPU but still working ..... And in this time we'll get him very cheap Only 4mb L2 cache slows him down

1404 Processors (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different CPUs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

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