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| Product | Intel Core 2 Extreme QX9650 | Intel Core i7-965 Extreme Edition  | Intel Core 2 Extreme X6800 | Intel Core 2 Quad Q6600 / 2.4 GHz processor | Intel Core 2 Duo E6700 |
| Price | $395.29 | $779.99 to $1,539.71 | $182.51 to $234.00 | $151.63 to $199.00 | $70.00 to $199.00 |
| CNET editors' rating | 4 stars | 4 stars | 4 stars | Info unavailable | 4.5 stars |
| Average user rating | 0 stars | 4 stars | 4.5 stars | 5 stars | 4 stars |
| Release date | November 12, 2007 | November 2, 2008 | July 13, 2006 | Info unavailable | July 13, 2006 |
| Bottom line | The CPU market is due for a lot of upheaval over the next 12 months, so you might be wise to wait for a clearer picture before plunking down $1,000 or so on Intel's new Core 2 Extreme QX9650 quad-core desktop processor. But if you want to claim ownership of the fastest multicore CPU around today, look no further. | Thanks to an expensive new motherboard requirement, Intel's new Core i7 desktop processors will remain enthusiast and professional-level parts until more affordable complementary hardware comes out later next year. Speed never comes cheap, however, and if you're willing to spend for it now, you'll find yourself in possession of the fastest CPU on the market. | AMD's Athlon 64 FX line has worn the desktop CPU performance crown for over a year. The king is dead. Intel's new flagship Core 2 Extreme X6800 not only hands AMD a defeat on all of our benchmarks, but it's also a more efficient, better designed chip overall. | Info unavailable | Intel's Core 2 Duo E6700 offers the best price-to-performance ratio we've seen in a desktop chip. For half the cost of AMD's top-of-the-line chip, you get identical if not superior performance and better power efficiency. AMD surprised us last year with its completely dominant dual-core chips, but Intel regains the crown with Core 2 Duo. |
| Product Description | Intel Core 2 Extreme QX9650 / 3 GHz Processor | Intel Core i7 Extreme Edition i7-965 / 3.2 GHz Processor | Intel Core 2 Extreme X6800 / 2.93 GHz Processor | Intel Core 2 Quad Q6600 / 2.4 GHz Processor | Intel Core 2 Duo E6700 / 2.66 GHz Processor |
| Packaged Quantity | 1 | 1 | 1 | 1 | 1 |
| Product Type | Processor | Processor | Processor | Processor | Processor |
| Processor Type | Intel Core 2 Extreme QX9650 | Intel Core i7 Extreme Edition i7-965 | Intel Core 2 Extreme X6800 | Intel Core 2 Quad Q6600 | Intel Core 2 Duo E6700 |
| Number of Cores | Quad-Core | Quad-Core | Dual-Core | Quad-Core | Dual-Core |
| 64-bit Computing | Yes | Yes | Yes | Yes | Yes |
| Compatible Processor Socket | LGA775 Socket | LGA1366 Socket | LGA775 Socket | LGA775 Socket | LGA775 Socket |
| Processor Qty | 1 | 1 | 1 | 1 | 1 |
| Clock Speed | 3 GHz | 3.2 GHz | 2.93 GHz | 2.4 GHz | 2.66 GHz |
| Bus Speed | 1333 MHz | Info unavailable | 1066 MHz | 1066 MHz | 1066 MHz |
| Manufacturing Process | 45 nm | 45 nm | 65 nm | 65 nm | 65 nm |
| Features | Streaming SIMD extensions 4 Execute Disable Bit capability Intel Wide Dynamic Execution Intel Smart Memory Access Enhanced SpeedStep technology Intel Advanced Smart Cache Intel Virtualization Technology Intel Advanced Digital Media Boost Intel 64 Technology | Execute Disable Bit capability Hyper-Threading Technology Enhanced SpeedStep technology Intel Virtualization Technology Intel Thermal Monitor 2 Intel 64 Technology Enhanced Halt State (C1E) Demand Based Switching | Execute Disable Bit capability Enhanced SpeedStep technology Intel Virtualization Technology Intel 64 Technology | Execute Disable Bit capability Intel Wide Dynamic Execution Intel Smart Memory Access Enhanced SpeedStep technology Intel Advanced Smart Cache Intel Virtualization Technology Intel Advanced Digital Media Boost Intel 64 Technology | Execute Disable Bit capability Enhanced SpeedStep technology Intel Virtualization Technology Intel 64 Technology |
| Compatible Slots | 1 x Processor - LGA775 Socket | 1 x Processor - LGA1366 Socket | 1 x Processor - LGA775 Socket | 1 x Processor - LGA775 Socket | 1 x Processor - LGA775 Socket |
| Manufacturer Warranty | 3 years warranty | 3 years warranty | 3 years warranty | 3 years warranty | 3 years warranty |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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