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 ...]

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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: 16.15

Overall Rank:
3544th fastest in multithreading out of 5785 CPUs
3447th fastest in single threading out of 5785 CPUs
992nd fastest in out of 1554 Desktop CPUs

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

Average CPU Mark rating

Multithread Rating

2082

Single Thread Rating

1142

Samples: 1677*
*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 Math	9,951 MOps/Sec
Floating Point Math	5,614 MOps/Sec
Find Prime Numbers	7 Million Primes/Sec
Random String Sorting	6,073 Thousand Strings/Sec
Data Encryption	553.1 MBytes/Sec
Data Compression	46,151 KBytes/Sec
Physics	148 Frames/Sec
Extended Instructions	818 Million Matrices/Sec
Single Thread	1,142 MOps/Sec

From submitted results to PerformanceTest V10 as of 13th of February 2026.

CPU Mark Distribution for Intel Core2 Quad Q8400 @ 2.66GHz

Submitted Baseline Distribution Graph as of 10th of February 2026

From submitted results since PerformanceTest V10 as of 10th of February 2026.
For distribution graph only: Results are trimmed to exclude outliers by disregarding the bottom 1% and top 1% of submissions.

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Pricing History

CPU Mark Relative to Top 10 Common Desktop CPUs
As of 14th of February 2026 - Higher results represent better performance
Processor	Average CPU Mark
Intel Core i9-14900K		58,451
Intel Core i9-13900K		58,294
AMD Ryzen 9 5900X		38,941
Apple M4 10 Core		23,700
AMD Ryzen 5 5600X		21,844
Intel Core i5-12400F		19,583
Intel Core i9-9900K @ 3.60GHz		18,084
AMD Ryzen 5 3600		17,679
Apple M2 8 Core 3500 MHz		15,640
Apple M1 8 Core 3200 MHz		14,133
Intel Core2 Quad Q8400 @ 2.66GHz		2,082

CPU Value (CPU Mark / $Price )
As of 14th of February 2026 - Higher results represent better value
Processor	CPU Mark / $Price
AMD Ryzen 5 5600X		136.53
AMD Ryzen 9 5900X		130.24
Intel Core i9-14900K		124.63
Intel Core i5-12400F		122.40
AMD Ryzen 5 3600		117.87
Intel Core i9-13900K		107.95
Intel Core i9-9900K @ 3.60GHz		60.60
Intel Core2 Quad Q8400 @ 2.66GHz		16.15
Apple M1 8 Core 3200 MHz		NA
Apple M2 8 Core 3500 MHz		NA
Apple M4 10 Core		NA

Single Thread Rating
As of 14th of February 2026 - Higher results represent better performance
Processor	Average Thread Rating
Intel Core i9-14900K		4,694
Intel Core i9-13900K		4,600
Apple M4 10 Core		4,516
Apple M2 8 Core 3500 MHz		3,886
Apple M1 8 Core 3200 MHz		3,676
Intel Core i5-12400F		3,489
AMD Ryzen 9 5900X		3,467
AMD Ryzen 5 5600X		3,365
Intel Core i9-9900K @ 3.60GHz		2,914
AMD Ryzen 5 3600		2,560
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
BL3265640 - Feb 05 2026		2360
BL3255382 - Feb 01 2026		2355
BL3233255 - Jan 22 2026 [Excluded]		2306
BL3172372 - Dec 29 2025		2081
BL3161367 - Dec 24 2025		2332

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 14th of February 2026 - Higher results represent better performance
Processor	Average CPU Mark
Intel Core2 Quad Q8400 @ 2.66GHz		2,082
Intel Core2 Quad Q6700 @ 2.66GHz vs Intel Core2 Quad Q8400		2,093 (+0.6%)
AMD Phenom II X4 910 vs Intel Core2 Quad Q8400		1,840 (-11.6%)
AMD Phenom 9850 Quad-Core vs Intel Core2 Quad Q8400		1,712 (-17.7%)
Intel Core i3-2120 @ 3.30GHz vs Intel Core2 Quad Q8400		1,979 (-4.9%)
AMD Athlon II X3 435 vs Intel Core2 Quad Q8400		1,645 (-21.0%)
Intel Core i3-550 @ 3.20GHz vs Intel Core2 Quad Q8400		1,632 (-21.6%)
AMD Phenom II X4 955 vs Intel Core2 Quad Q8400		2,551 (+22.6%)
Intel Core2 Quad Q9650 @ 3.00GHz vs Intel Core2 Quad Q8400		2,517 (+20.9%)
AMD Athlon II X4 651 Quad-Core vs Intel Core2 Quad Q8400		2,433 (+16.9%)
AMD Phenom II X4 945 vs Intel Core2 Quad Q8400		2,422 (+16.4%)
Intel Core i5-660 @ 3.33GHz vs Intel Core2 Quad Q8400		2,412 (+15.9%)
AMD A6-3650 APU vs Intel Core2 Quad Q8400		2,098 (+0.8%)

Is the Intel Core2 Quad Q8400 @ 2.66GHz Good for Gaming?
As of 14th of February 2026 - Higher results represent better performance
Processor	Relative Gaming Score
AMD Ryzen 9 9950X3D2		14,501
AMD Ryzen 9 9900X3D		12,426
AMD Ryzen 7 9800X3D		12,123
AMD Ryzen 9 9950X3D		11,257
AMD Ryzen 9 7900X3D		10,794
Intel Core Ultra 7 270K Plus		10,695
AMD Ryzen 5 7600X3D		10,516
Intel Core Ultra 9 285K		10,382
AMD Ryzen 7 7800X3D		10,258
AMD Ryzen 5 7500X3D		10,194
AMD Ryzen 9 7950X3D		9,778
AMD Ryzen 9 9955HX3D		9,772
Intel Core2 Quad Q8400 @ 2.66GHz		155

CPU Benchmarks

CPU Benchmarks

Intel Core2 Quad Q8400 @ 2.66GHz

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

CPU Mark Distribution for Intel Core2 Quad Q8400 @ 2.66GHz

Pricing History