Core i9-9900KF vs Core 2 Extreme QX6800
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 913 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 5.59 |
| Market segment | Desktop processor | Desktop processor |
| Series | no data | Intel Core i9 |
| Power efficiency | no data | 4.57 |
| Designer | Intel | Intel |
| Manufacturer | no data | Intel |
| Architecture codename | Kentsfield (2007) | Coffee Lake-R (2018−2019) |
| Release date | April 2007 (19 years ago) | 8 January 2019 (7 years ago) |
| Launch price (MSRP) | no data | $488 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Performance to price scatter graph
Detailed specifications
Basic parameters of Core 2 Extreme QX6800 and Core i9-9900KF: number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 4 (Quad-Core) | 8 (Octa-Core) |
| Threads | 4 | 16 |
| Base clock speed | 2.93 GHz | 3.6 GHz |
| Boost clock speed | 2.93 GHz | 5 GHz |
| Bus type | no data | DMI 3.0 |
| Bus rate | 1066 MHz | 4 × 8 GT/s |
| L1 cache | 64K (per core) | 64K (per core) |
| L2 cache | 8 MB (shared) | 256K (per core) |
| L3 cache | 0 KB | 16 MB (shared) |
| Chip lithography | 65 nm | 14 nm |
| Die size | 2x 143 mm2 | no data |
| Maximum core temperature | 65 °C | 100 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| Number of transistors | 582 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | + | + |
| VID voltage range | 0.85V-1.5V | no data |
Compatibility
Information on Core 2 Extreme QX6800 and Core i9-9900KF compatibility with other computer components: 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 configuration | 1 | 1 (Uniprocessor) |
| Socket | LGA775 | FCLGA1151 |
| Power consumption (TDP) | 130 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Extreme QX6800 and Core i9-9900KF. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | - | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | 2.0 |
| Hyper-Threading Technology | - | + |
| TSX | - | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Demand Based Switching | - | no data |
| FSB parity | - | no data |
Security technologies
Core 2 Extreme QX6800 and Core i9-9900KF technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
| MPX | - | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Extreme QX6800 and Core i9-9900KF are enumerated here.
| VT-d | no data | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme QX6800 and Core i9-9900KF. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR4-2666 |
| Maximum memory size | no data | 128 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 42.671 GB/s |
Peripherals
Specifications and connection of peripherals supported by Core 2 Extreme QX6800 and Core i9-9900KF.
| PCIe version | no data | 3.0 |
| PCI Express lanes | no data | 16 |
Pros & cons summary
| Physical cores | 4 | 8 |
| Threads | 4 | 16 |
| Chip lithography | 65 nm | 14 nm |
| Power consumption (TDP) | 130 Watt | 95 Watt |
i9-9900KF has 100% more physical cores and 300% more threads, a 364% more advanced lithography process, and 37% lower power consumption.
We couldn't decide between Intel Core 2 Extreme QX6800 and Intel Core i9-9900KF. We've got no test results to judge.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
