Gearing Up for "Nehalem" Sockets
November 28, 2007 6:31 PM
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Intel partners reveal plans for new processor socket designs
In a memo copied to
, Intel partners recently discussed details regarding Intel's next-generation socket designs.
next-generation processor family
, integrates the memory controller directly onto the processor die -- a feature already standard on AMD's K8 and K10 core architecture.
Where companies traditionally increase pin count for new processor designs, Intel's LGA715 (also dubbed Socket H) will actually decrease the amount of pins from 775 to 715. Since the memory controller will reside on the processor,
processors no longer need the additional signaling from the processor to the Northbridge.
Guidance released to Japanese
claims this new desktop socket will actually utilize a
1160-pin LGA1160 design instead
. Intel officials would not reveal exact pin count details.
LGA1366, on the other hand, will greatly increase the pin-count for cross-CPU communication via Intel's QuickPath Interface. AMD increased its pin-count for server chipsets when it migrated from PGA940 to LGA1207 design last year.
processors will use Registered DDR3 memory; desktop processors will utilize the unregistered variant. While not electrically compatible with DDR2, DDR3 still uses 240 pins for signally thus eliminating the need to increase pins on account of the system memory.
As one Intel engineer who agreed to speak on conditions of anonymity put it, "We try to reduce the pin counts as much as possible to eliminate cross talk and other interference." He adds, "But we do try to leave some pins for overhead and future use."
-based CPUs will use Intel's second-generation land grid array (LGA) design. The use of "pins" in context of the land grid array is a bit of a misnomer as the processor interfaces with the socket design via pads rather than pins. This LGA design is recognized by both AMD and Intel for its ability to increase "pin" density and durability.
Corporate roadmaps from Tyan and Supermicro both detail LGA1366 designs for sampling by the end of Q2 2008. Desktop LGA715 variants, on the other hand, won't see mass production until the second half of 2008, with a target launch of Q4 2008.
Intel guidance slates
chipsets for a Q3 2008 launch
chipsets using the LGA715 design are on the record for Q4 2008.
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RE: please change your socket design!
11/29/2007 6:07:28 AM
As for creating a solid pin on the socket it would create a lot of problems with seating the CPU properly not when first installed but, when being held in place by whatever retention system, the current designs squeeze the packaging against the socket and the pins stay suspended. Having a hard surface would be much more stressful on the packaging and i would almost guarantee the package would warp.
Slot designs are simply inefficient, both thermally and cost-wise. Thermally because they tend to create a dead-spot for air and because you simply cannot secure the card well enough to attach a heat sink large enough. cost wise because a socket design is much smaller, requiring less silicon and because with the number of leads continually going up the cards would have to be MASSIVE to allow for enough leads. For comparison, PCI-E x16 has just over 80 total leads, imagine trying to make that 715 or 775 or 940 and that not even server processors, how about 1300 leads for server CPU's. Just completely infeasible.
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