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Intel Core2 Quad Q8400 @ 2.66GHz

Benchmarks for the Intel Core2 Quad Q8400 can be found below. Release dates, price and performance comparisons are also listed when available. This is made using thousands of PerformanceTest benchmark results and is updated daily.

  • The first graph shows the relative performance of the CPU compared to the 10 other common (single) CPUs in terms of PassMark CPU Mark.
  • The 2nd graph shows the value for money, in terms of the CPUMark per dollar.
  • The pricing history data shows the price for a single Processor. For multiple Processors, multiply the price shown by the number of CPUs.

Is the Intel Core2 Quad Q8400 @ 2.66GHz Good for Gaming?

This is a fairly old CPU that is no longer competitive with newer CPUs. [More ...]


Intel Core2 Quad Q8400 @ 2.66GHz

Description:

Class: Desktop

Socket: LGA775

Clockspeed: 2.7 GHz

Cores: 4 Threads: 4

Typical TDP: 95 W

Cache per CPU Package:
L1 Instruction Cache: 4 x 32 KB
L1 Data Cache: 4 x 32 KB
L2 Cache: 2 x 2048 KB

Other names: Intel(R) Core(TM)2 Quad CPU Q8400 @ 2.66GHz, Intel(R) Core(TM)2 Quad CPU Q8400 @ 2.66GHz, Intel Core2 Quad CPU Q8400 @ 2.66GHz

CPU First Seen on Charts: Q2 2009

CPUmark/$Price: 16.11

Overall Rank:
3461st fastest in multithreading out of 5477 CPUs
3369th fastest in single threading out of 5477 CPUs
977th fastest in out of 1484 Desktop CPUs

Last Price Change: $128.88 USD (2021-01-23)

Average CPU Mark rating
Multithread Rating
2076
Single Thread Rating
1142

Samples: 1669*
*Margin for error: Low



PerformanceTest V9
CPU Mark: 3,007
Thread: 1,101

CPU Test Suite Average Results for Intel Core2 Quad Q8400 @ 2.66GHz

Integer Math9,928 MOps/Sec
Floating Point Math5,609 MOps/Sec
Find Prime Numbers7 Million Primes/Sec
Random String Sorting6,070 Thousand Strings/Sec
Data Encryption551.4 MBytes/Sec
Data Compression46,100 KBytes/Sec
Physics148 Frames/Sec
Extended Instructions815 Million Matrices/Sec
Single Thread1,142 MOps/Sec
From submitted results to PerformanceTest V10 as of 9th of December 2025.

CPU Mark Distribution for Intel Core2 Quad Q8400 @ 2.66GHz

Submitted Baseline Distribution Graph as of 2nd of December 2025
From submitted results since PerformanceTest V10 as of 2nd of December 2025.
For distribution graph only: Results are trimmed to exclude outliers by disregarding the bottom 1% and top 1% of submissions.

Search for Intel Core2 Quad Q8400 @ 2.66GHz
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Pricing History


CPU Mark Relative to Top 10 Common Desktop CPUs
As of 9th of December 2025 - Higher results represent better performance
Processor Average CPU Mark
Intel Core i9-14900K
 58,547
Intel Core i9-13900K
 58,358
AMD Ryzen 9 5900X
 38,953
Apple M1 Max 10 Core 3200 MHz
 22,147
AMD Ryzen 5 5600X
 21,845
Intel Core i5-12400F
 19,540
Intel Core i9-9900K @ 3.60GHz
 18,110
AMD Ryzen 5 3600
 17,684
Apple M2 8 Core 3500 MHz
 15,654
Apple M1 8 Core 3200 MHz
 14,144
Intel Core2 Quad Q8400 @ 2.66GHz
 2,076
CPU Value (CPU Mark / $Price )
As of 9th of December 2025 - Higher results represent better value
Processor CPU Mark / $Price
AMD Ryzen 5 3600
 263.95
AMD Ryzen 5 5600X
 159.58
AMD Ryzen 9 5900X
 149.85
Intel Core i9-14900K
 136.48
Intel Core i5-12400F
 122.13
Intel Core i9-13900K
 106.17
Intel Core i9-9900K @ 3.60GHz
 53.74
Intel Core2 Quad Q8400 @ 2.66GHz
 16.11
Apple M1 8 Core 3200 MHz
 NA
Apple M2 8 Core 3500 MHz
 NA
Apple M1 Max 10 Core 3200 MHz
 NA
Single Thread Rating
As of 9th of December 2025 - Higher results represent better performance
Processor Average Thread Rating
Intel Core i9-14900K
 4,696
Intel Core i9-13900K
 4,601
Apple M2 8 Core 3500 MHz
 3,890
Apple M1 Max 10 Core 3200 MHz
 3,833
Apple M1 8 Core 3200 MHz
 3,678
Intel Core i5-12400F
 3,487
AMD Ryzen 9 5900X
 3,467
AMD Ryzen 5 5600X
 3,364
Intel Core i9-9900K @ 3.60GHz
 2,915
AMD Ryzen 5 3600
 2,561
Intel Core2 Quad Q8400 @ 2.66GHz
 1,142
Last 5 Baselines for Intel Core2 Quad Q8400 @ 2.66GHz
Most recent listed first
Baseline CPU Mark
BL3082824 - Nov 25 2025 [Excluded]
1160
BL3082182 - Nov 25 2025 [Excluded]
1117
BL3074159 - Nov 22 2025
2110
BL3073917 - Nov 22 2025
2003
BL3067966 - Nov 20 2025
1505
Additional baselines can be obtained using Windows version of PerformanceTest's Manage Baselines feature.
Popular comparisons for Intel Core2 Quad Q8400 @ 2.66GHz
As of 9th of December 2025 - Higher results represent better performance
Processor Average CPU Mark
Intel Core2 Quad Q8400 @ 2.66GHz
 2,076
AMD Phenom II X4 910 vs Intel Core2 Quad Q8400
 1,776 (-14.5%)
AMD Phenom 9850 Quad-Core vs Intel Core2 Quad Q8400
 1,712 (-17.5%)
Intel Core2 Quad Q6700 @ 2.66GHz vs Intel Core2 Quad Q8400
 2,092 (+0.7%)
AMD Athlon II X3 435 vs Intel Core2 Quad Q8400
 1,645 (-20.8%)
Intel Core i3-550 @ 3.20GHz vs Intel Core2 Quad Q8400
 1,632 (-21.4%)
AMD Phenom II X4 955 vs Intel Core2 Quad Q8400
 2,545 (+22.6%)
Intel Core2 Quad Q9650 @ 3.00GHz vs Intel Core2 Quad Q8400
 2,508 (+20.8%)
Intel Core i5-660 @ 3.33GHz vs Intel Core2 Quad Q8400
 2,439 (+17.5%)
AMD Athlon II X4 651 Quad-Core vs Intel Core2 Quad Q8400
 2,433 (+17.2%)
AMD Phenom II X4 945 vs Intel Core2 Quad Q8400
 2,422 (+16.7%)
AMD A6-3650 APU vs Intel Core2 Quad Q8400
 2,098 (+1.1%)
Intel Core2 Quad Q8300 @ 2.50GHz vs Intel Core2 Quad Q8400
 1,917 (-7.7%)

Is the Intel Core2 Quad Q8400 @ 2.66GHz Good for Gaming?
As of 9th of December 2025 - Higher results represent better performance
Processor Relative Gaming Score
AMD Ryzen 9 9900X3D
 12,441
AMD Ryzen 7 9800X3D
 12,126
AMD Ryzen 9 9950X3D
 11,255
AMD Ryzen 9 7900X3D
 10,797
AMD Ryzen 5 7600X3D
 10,509
Intel Core Ultra 9 285K
 10,452
AMD Ryzen 5 7500X3D
 10,350
AMD Ryzen 7 7800X3D
 10,270
AMD Ryzen 9 7950X3D
 9,778
AMD Ryzen 9 9955HX3D
 9,663
Intel Core Ultra 7 265K
 9,478
Intel Core Ultra 9 285
 9,395
Intel Core2 Quad Q8400 @ 2.66GHz
 155