EPYC 9255 vs Core 2 Extreme QX9775
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 72 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 18.12 |
| Market segment | Desktop processor | Server |
| Power efficiency | no data | 23.04 |
| Designer | Intel | AMD |
| Manufacturer | Intel | TSMC |
| Architecture codename | Yorkfield (2007−2009) | Turin (2024) |
| Release date | 24 March 2008 (17 years ago) | 10 October 2024 (1 year ago) |
| Launch price (MSRP) | $1,499 | $2,495 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Performance to price scatter graph
Detailed specifications
Core 2 Extreme QX9775 and EPYC 9255 basic parameters such as 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) | 24 (Tetracosa-Core) |
| Threads | 4 | 48 |
| Base clock speed | 3.2 GHz | 3.25 GHz |
| Boost clock speed | 3.2 GHz | 4.8 GHz |
| Bus rate | 1600 MHz | no data |
| L1 cache | 64 KB (per core) | 80 KB (per core) |
| L2 cache | 6 MB (per die) | 1 MB (per core) |
| L3 cache | 0 KB | 128 MB (shared) |
| Chip lithography | 45 nm | 4 nm |
| Die size | 2x 107 mm2 | 4x 70.6 mm2 |
| Maximum case temperature (TCase) | 63 °C | no data |
| Number of transistors | 820 million | 33,260 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| Unlocked multiplier | + | - |
| VID voltage range | 0.85V-1.35V | no data |
Compatibility
Information on Core 2 Extreme QX9775 and EPYC 9255 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 | 2 | 2 |
| Socket | LGA771 | SP5 |
| Power consumption (TDP) | 150 Watt | 200 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Extreme QX9775 and EPYC 9255. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Turbo Boost Technology | - | no data |
| Hyper-Threading Technology | - | no data |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Demand Based Switching | - | no data |
| FSB parity | - | no data |
| Precision Boost 2 | no data | + |
Security technologies
Core 2 Extreme QX9775 and EPYC 9255 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | no data |
| EDB | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Extreme QX9775 and EPYC 9255 are enumerated here.
| AMD-V | - | + |
| VT-x | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme QX9775 and EPYC 9255. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR2 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | N/A |
Peripherals
Specifications and connection of peripherals supported by Core 2 Extreme QX9775 and EPYC 9255.
| PCIe version | 1.0 | 5.0 |
| PCI Express lanes | no data | 128 |
Pros & cons summary
| Recency | 24 March 2008 | 10 October 2024 |
| Physical cores | 4 | 24 |
| Threads | 4 | 48 |
| Chip lithography | 45 nm | 4 nm |
| Power consumption (TDP) | 150 Watt | 200 Watt |
Core 2 Extreme QX9775 has 33.3% lower power consumption.
EPYC 9255, on the other hand, has an age advantage of 16 years, 500% more physical cores and 1100% more threads, and a 1025% more advanced lithography process.
We couldn't decide between Intel Core 2 Extreme QX9775 and AMD EPYC 9255. We've got no test results to judge.
Note that Core 2 Extreme QX9775 is a desktop processor while EPYC 9255 is a server/workstation one.
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