Intel Core 2 Extreme QX9775 EU80574XL088N (BX80574QX9775 / BX80574QX9775A)
Core 2 Extreme QX9775 microprocessor, part of "Skulltrail" platform, was launched in February 2008. "Skulltrail", that also included desktop D5400XS motherboard, was demonstrated numerous times before the official launch, and was positioned as a gaming and digital media platform. The platform was unique in a sense that it took "Extreme" from the family name to the extreme. While frequency and features of the QX9775 processor were not different from the QX9770, the QX9775 supported dual CPU configuration. Being the socket 771 CPU, the QX9775 couldn't work in consumer socket 775 motherboards, and required quite expensive dual-socket D5400XS board. The board also accepted up to four PCI Express graphics cards, either NVIDIA SLI or ATI CrossFireX, and supported up to 8 GB FBDIMM 800 memory. Although the board had sockets 771, it used socket 775 heatsinks. The price for this platform was also "extreme". Each QX9775 processor had suggested retail price $1499, and the price of the D5400XS board was $600+, so the total just for two CPUs with the board would be more than $3600.
The QX9775 platform outperformed QX9770 by large margin in multi-threaded digital media applications, but it didn't always have the best performance in games owing to their poor utilization of multiple cores. Compared with the QX9770, the platform had noticeable performance advantage in some games, while not showing any performance difference in other games, or, in some cases, showing worse performance due to lower memory bandwidth than the memory bandwidth available on QX9770 consumer boards with DDR3 memory.
Intel Core 2 Extreme QX9775 specifications
|Type||CPU / Microprocessor|
|Family||Intel Core 2 Extreme|
|Model number ? ||QX9775|
|CPU part numbers||EU80574XL088N is an OEM/tray microprocessor|
BX80574QX9775 is a boxed microprocessor
BX80574QX9775A is a boxed microprocessor
BX80574QX9775P is a boxed microprocessor
|Frequency ? ||3200 MHz|
|Bus speed ? ||1600 MHz|
|Clock multiplier ? ||8|
|Package||771-land Flip-Chip Land Grid Array (FC-LGA8)|
1.48" x 1.48" (3.75 cm x 3.75 cm)
|Socket||Socket 771 / LGA771|
|Introduction date||February 19, 2008|
|Price at introduction||$1499|
|Architecture / Microarchitecture|
|Processor core ? ||Yorkfield|
|Core stepping ? ||C0 (SLANY)|
|Manufacturing process||0.045 micron|
820 million transistors
|Data width||64 bit|
|The number of cores||4|
|The number of threads||4|
|Floating Point Unit||Integrated|
|Level 1 cache size ? ||4 x 32 KB 8-way set associative instruction caches|
4 x 32 KB 8-way set associative data caches
|Level 2 cache size ? ||2 x 6 MB 24-way set associative caches (each L2 cache is shared between 2 cores)|
|Multiprocessing||Up to 2 processors|
- MMX instructions
- SSE / Streaming SIMD Extensions
- SSE2 / Streaming SIMD Extensions 2
- SSE3 / Streaming SIMD Extensions 3
- SSSE3 / Supplemental Streaming SIMD Extensions 3
- EM64T / Extended Memory 64 technology / Intel 64 ?
- VT / Virtualization technology ?
- NX / XD / Execute disable bit ?
- SSE4.1 / Streaming SIMD Extensions 4.1 ?
|Low power features|
- Enhanced SpeedStep technology ?
- Stop Grant state ?
- Halt state
- Extended Halt state
|Electrical / Thermal parameters|
|V core ? ||0.85V - 1.35V|
|Minimum/Maximum operating temperature ? ||5°C - 63°C|
|Thermal Design Power ? ||150 Watt|
|Notes on Intel EU80574XL088N|
- Binary compatible with 32-bit x86 software
- Bus frequency is 400 MHz. Because the processor uses Quad Data Rate bus the effective bus speed is 1600 MHz
CPUs, related to Intel Core 2 Extreme QX9775
• Within each category, the CPUs are sorted from slower (at the top) to faster (at the bottom)
Q: Can I upgrade my QX9775 microprocessor?
A: Probably yes. Processor compatibility is determined by your motherboard. Please see CPU-Upgrade.com resource for CPU support list for your board.
Intel QX9775 Overclocking
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Intel Core 2 Extreme QX9775 review, or your experience with the microprocessor.
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