Intel Core i9-9940X | Intel Core 2 Quad Q8400s | |
CPU comparisonIntel Core i9-9940X or Intel Core 2 Quad Q8400s - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.
The Intel Core i9-9940X has 14 cores with 28 threads and clocks with a maximum frequency of 4.50 GHz. Up to 128 GB of memory is supported in 4 memory channels. The Intel Core i9-9940X was released in Q4/2018. The Intel Core 2 Quad Q8400s has 4 cores with 4 threads and clocks with a maximum frequency of 2.66 GHz. The CPU supports up to 16 GB of memory in 2 memory channels. The Intel Core 2 Quad Q8400s was released in Q2/2009. |
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Intel Core i9 (78) | Family | Intel Core2 Quad (19) |
Intel Core i 9000X (8) | CPU group | Intel Core 2 Quad Q8000/Q9000 (16) |
9 | Generation | 2 |
Skylake X Refresh | Architecture | Yorkfield (Penryn) |
Desktop / Server | Segment | Desktop / Server |
Intel Core i9-7940X | Predecessor | -- |
-- | Successor | -- |
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CPU Cores and Base FrequencyThe Intel Core i9-9940X is a 14 core processor with a clock frequency of 3.30 GHz (4.50 GHz). The Intel Core 2 Quad Q8400s has 4 CPU cores with a clock frequency of 2.66 GHz. |
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Intel Core i9-9940X | Characteristic | Intel Core 2 Quad Q8400s |
14 | Cores | 4 |
28 | Threads | 4 |
normal | Core architecture | normal |
Yes | Hyperthreading | No |
Yes | Overclocking ? | No |
3.30 GHz | Frequency | 2.66 GHz |
4.50 GHz | Turbo Frequency (1 Core) | -- |
4.20 GHz | Turbo Frequency (All Cores) | -- |
Memory & PCIeThe Intel Core i9-9940X supports a maximum of 128 GB of memory in 4 memory channels. The Intel Core 2 Quad Q8400s can connect up to 16 GB of memory in 2 memory channels. |
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Intel Core i9-9940X | Characteristic | Intel Core 2 Quad Q8400s |
DDR4-2666 | Memory | DDR3-1066, DDR2-800 |
128 GB | Max. Memory | 16 GB |
4 (Quad Channel) | Memory channels | 2 (Dual Channel) |
85.4 GB/s | Max. Bandwidth | 17.1 GB/s |
No | ECC | No |
-- | L2 Cache | 4.00 MB |
19.00 MB | L3 Cache | -- |
3.0 | PCIe version | -- |
44 | PCIe lanes | -- |
43.3 GB/s | PCIe Bandwidth | -- |
Thermal ManagementThe TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Core i9-9940X has a TDP of 165 W, that of the Intel Core 2 Quad Q8400s is 65 W. |
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Intel Core i9-9940X | Characteristic | Intel Core 2 Quad Q8400s |
165 W | TDP (PL1 / PBP) | 65 W |
-- | TDP (PL2) | -- |
-- | TDP up | -- |
-- | TDP down | -- |
92 °C | Tjunction max. | -- |
Technical detailsThe Intel Core i9-9940X has a 19.00 MB cache, while the Intel Core 2 Quad Q8400s cache has a total of 4.00 MB. |
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Intel Core i9-9940X | Characteristic | Intel Core 2 Quad Q8400s |
14 nm | Technology | 45 nm |
Monolithic | Chip design | Monolithic |
x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
SSE4.1, SSE4.2, AVX2, AVX-512 | ISA extensions | MMX, SSE2, SSE3, SSE4.1 |
LGA 2066 | Socket | LGA 775 |
VT-x, VT-x EPT, VT-d | Virtualization | VT-x, VT-d |
Yes | AES-NI | No |
Windows 10, Windows 11, Linux | Operating systems | Windows 10, Linux |
Q4/2018 | Release date | Q2/2009 |
1387 $ | Release price | -- |
show more data | show more data | |
Intel Core i9-9940X
14C 28T @ 4.50 GHz |
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Intel Core 2 Quad Q8400s
4C 4T @ 2.66 GHz |
Intel Core i9-9940X
14C 28T @ 4.20 GHz |
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Intel Core 2 Quad Q8400s
4C 4T @ 2.66 GHz |
Intel Core i9-9940X
14C 28T @ 4.50 GHz |
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Intel Core 2 Quad Q8400s
4C 4T @ 2.66 GHz |
Intel Core i9-9940X
14C 28T @ 4.20 GHz |
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Intel Core 2 Quad Q8400s
4C 4T @ 2.66 GHz |
Intel Core i9-9940X
14C 28T @ 4.50 GHz |
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Intel Core 2 Quad Q8400s
4C 4T @ 2.66 GHz |
Intel Core i9-9940X
14C 28T @ 4.20 GHz |
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Intel Core 2 Quad Q8400s
4C 4T @ 2.66 GHz |
Intel Core i9-9940X
14C 28T @ 4.20 GHz |
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Intel Core 2 Quad Q8400s
4C 4T @ 2.66 GHz |
Intel Core i9-9940X
14C 28T @ 4.50 GHz |
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Intel Core 2 Quad Q8400s
4C 4T @ 2.66 GHz |
Intel Core i9-9940X
14C 28T @ 4.20 GHz |
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Intel Core 2 Quad Q8400s
4C 4T @ 2.66 GHz |
Devices using this processor |
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Intel Core i9-9940X | Intel Core 2 Quad Q8400s |
Unknown | Unknown |