Intel's first Core i5 and new Core i7s benchmarked
Manufacturer: Intel
Core i5-750
Core i7-860
Core i7-870
This processor is based on the revolutionary Nehalem architecture. The original Bloomfield-design Core i7 CPUs are hard to justify because of the initial high price of the LGA1366 motherboards and triple-channel DDR3 memory kits it required.
Intel's plan was always for LGA1366 to be for high-end systems, however, and later planned to release a lower-cost platform to fit between Core 2 and Core i7. The new Lynnfield CPUs are designed to fill that gap. It has only a dual-channel DDR3 memory controller to keep down the cost of upgrading.
The socket for Lynnfield has 1,156 pins because of the fewer connections between CPU and memory than LGA1366. The resulting LGA1156 processor socket is midway in size between LGA1336 and LGA775, and has different mounting holes to those of LGA1366 and LGA775. This means that you'll also need a new cooler for an LGA1156 motherboard.
The Lynnfield CPUs are functionally identical.
Each of the four cores has:
Improvements over a Bloomfield Core i7:
Core i5 and LGA1156 Core i7 details
Core i5-750
UK Price (as reviewed): £155 (inc VAT)
US Price (as reviewed): $199.99 (ex Tax) MSRP
Core i7-860
UK Price (as reviewed): £225 (inc VAT)
US Price (as reviewed): $299.99 (ex Tax)
Core i7-870
UK Price (as reviewed): £441 (inc VAT)Within a year, Intel launched the first Core i7 processors.
US Price (as reviewed): $579.99 (ex Tax)
This processor is based on the revolutionary Nehalem architecture. The original Bloomfield-design Core i7 CPUs are hard to justify because of the initial high price of the LGA1366 motherboards and triple-channel DDR3 memory kits it required.
Intel's plan was always for LGA1366 to be for high-end systems, however, and later planned to release a lower-cost platform to fit between Core 2 and Core i7. The new Lynnfield CPUs are designed to fill that gap. It has only a dual-channel DDR3 memory controller to keep down the cost of upgrading.
The socket for Lynnfield has 1,156 pins because of the fewer connections between CPU and memory than LGA1366. The resulting LGA1156 processor socket is midway in size between LGA1336 and LGA775, and has different mounting holes to those of LGA1366 and LGA775. This means that you'll also need a new cooler for an LGA1156 motherboard.
The Lynnfield CPUs are functionally identical.
Each of the four cores has:
A 32KB instruction
A 32KB data Level 1 cache
A 256KB of Level 2 cache
The four cores share an inclusive 8MB Level 3 cache
The £441 Core i7-870 is clocked at 2.93GHz
The £225 Core i7-860 at 2.8GHz
The £155 Core i5-750 at 2.66GHz
Improvements over a Bloomfield Core i7:
Integrated PCI Express controller
This CPU can communicate directly with a graphics card as compared to the previous CPUs that required an external chip
It is designed to be a mainstream choice
It can split these to provide two graphics cards with eight lanes of bandwidth each
It supports both SLI and CrossFire
Core i5 and LGA1156 Core i7 details
Frequency: 2.66GHz (i5-750), 2.8GHz (i7-860), 2.93GHz (i7-870)
Core: Lynnfield
Packaging: LGA1156
L1 cache: 32KB L1 data, 32KB L1 instruction per core
L2 cache: 256KB per core, inclusive
L3 cache: 8MB accessible by all cores, inclusive
QPI: 4.8GT/sec
Memory: Dual-channel unbuffered DDR3-1,333MHz
TDP: 95W
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