Technology.am (Sept. 08, 2009) — It has been ten months since the first Core i7 900 series chips were released; now Intel announced the new, more affordable Core i7 800-series chips, as well as cheaper Core i5 CPUs.
The Core i7 series have a double-channel memory interface, as opposed to triple-channel RAM in the Core i7 900’s.
The Intel Core i7-870 for $562 and 2.93GHz is the high-end entry in a trio of new chips based on the company’s new “Lynnfield” architecture.
The other Core i7’s include the $284 Core i7 860 at 2.8GHz, as well as the $196 2.6GHz Core i5 750 chip.
The Core i7-860, have very similar features to that of Intel’s earlier “Bloomfield”-family Core i7-900 series chips. But these lower-cost processors are based on two primary new elements: the P55 Express chipset, and the LGA 1156 CPU socket. (All earlier Core i7 CPUs employed a different, incompatible socket, the LGA 1366.)
The Core i7-870 has 4 processor cores and supports Intel’s Hyper-Threading (HT) technology, allowing it to handle up to eight simultaneous processor threads.
The i7 is faster than the i5 and the i7-920 (Bloomfield) is faster than the i7-860 (Lynnfield) as indicated by the higher model number.
Like the i7-920, the i7-860 has four physical cores and due to SMT (Simultaneous Multi Threading) four virtual cores, it supports Intel’s Hyper-Threading (HT) technology, allowing it to handle up to eight simultaneous processor threads.
The Core i5 CPUs will have the same 8MB L3 cache, VT-x virtual machines and LGA 1156 socket support as the Core i7, but lack the Hyper Threading technology.
Model Codename Cores Multipl. Frequency Max. Turbo Mode FSB/HT frequency Cache (L2/L3) TDP RAM-Contr. Socket Introduction
Intel Core i7-920 Bloomfield 4/8 20 2.67 GHz 2.93 GHz 2.4 GHz (QPI) 4 x 256 KiB/8 MiB 130 W 3 x DDR3 LGA 1366 11/2008
Intel Core i7-860 Lynnfield 4/8 21 2.8 GHz 3.46 GHz 2.13 GHz (DMI) 4 x 256 KiB/8 MiB 95 W 2 x DDR3 LGA 1156 09/2009
Intel Core i5-750 Lynnfield 4/4 20 2.67 GHz 3.2 GHz 2.13 GHz (DMI) 4 x 256 KiB/8 MiB 95 W 2 x DDR3 LGA 1156 09/2009