Slot 1
| Slot 1 | |
|---|---|
|
|
| Specifications | |
| introduction | May 7, 1997 |
| design type | SECC, SEPP, SECC2 |
| contacts | 242 |
| Bus protocol | GTL + |
| Bus cycle | 66/100 MHz (Intel P6 chipsets) 133 MHz (VIA-P6 chipsets) |
| Operating voltage | 1.3 to 3.5 volts regulated via voltage ID |
| Processors |
Pentium II : 233-450 MHz Celeron : 266–433 MHz |
The Slot 1 is a processor socket for Intel processors of series Pentium Pro , Pentium II , Celeron and some Pentium III .
General
With the introduction of the Pentium II, the transition from the socket to the slot became necessary, since the processor core and the cache memory are separate chips on a common circuit board.
For slot 1 there are plug-in cards that contain a socket 8 in order to be able to use Pentium Pro processors on slot 1 mainboards . However, these adapters are relatively rare.
There are also adapters that provide a socket 370 to use the newer processors in this socket. These adapters, also known as “slot kets”, are partly equipped with their own voltage regulators in order to be able to supply the newer CPUs with a lower core voltage than the mainboard can normally provide.
Intel supports Symmetric Multiprocessing (SMP) with slot 1 . A maximum of two Pentium II or Pentium III CPUs can be operated in a dual board. There is no official SMP support for the Celeron.
The inserted at slot 1 mechanical connector SC242 was later also of AMD for the slot A is used. However, it was rotated by 180 ° and attached to the boards to prevent confusion.
Designs
The SECC (Single Edge Contact Cartridge) design was used in the Pentium II at the beginning of the Slot 1 era. The CPU is embedded in a plastic or metal hybrid housing. The back is made of plastic and bears the words “Pentium II”, the Intel company logo, a hologram and the model number. The front consists of a black anodized aluminum plate that serves as a support surface for the processor cooler. The SECC design is considered to be very robust because the CPU is protected inside the housing. In contrast to socket CPUs, pins cannot break off, nor can the housing be damaged by improper cooler installation.
Then the SEPP (Single Edge Processor Package) came on the market, which was designed for the inexpensive Celerons. Intel has completely eliminated the case here for cost reasons.
The Pentium III CPUs then came back in a housing called SECC2 . Only the plastic side of the former SECC housing is preserved, the aluminum plate has been saved. The CPU is exposed. As with the Celeron, the heat sink rests directly on the CPU die.
Historical
Historically, there are three platforms for P6 processors: Socket 8, Slot 1, and Socket 370.
Slot 1 is a successor to Socket 8. While in Socket 8 (Pentium Pro) the L2 cache is located directly on the CPU , in Slot 1 CPUs it is housed together with the CPU die on a circuit board to maximize the yield increase in the production process. The last slot 1 CPUs with Coppermine core are an exception, in which the L2 cache is already integrated in the die.
Originally, Socket 370 was intended as a platform for the low-cost Celeron and the slot as a platform for the more expensive Pentium II and Pentium III processors. At the beginning of 2000, however, with the advent of Pentium III CPUs in the FC-PGA housing, slot 1 was replaced by socket 370, after both connection types had been offered in parallel since the beginning of 1999. The reason was the cheaper production, which - thanks to improved production processes - was made possible by the integration of the L2 cache on the processor. Since the Pentium III development continued on Socket 370, the Pentium III with Coppermine core and 1000 MHz clock remained the fastest available CPU for slot 1, while the Coppermine successor Tualatin with up to 1.4 GHz only for the base 370 was offered.
Slot 1 also replaced Socket 7 as a platform for the home user market - as far as Intel is concerned . With the expiry of the Pentium MMX CPUs, Intel left the field of socket 7 processors entirely to the manufacturers AMD , Cyrix and IDT .
Common chipsets for slot 1 and officially supported CPUs
Intel 440FX
- Launch date: May 6, 1996
- FSB : 66 MHz
- Supported memory type: EDO-DRAM
- Supported CPUs:
- Pentium Pro
- Pentium II with 66 MHz FSB
- early Celerons (Covington, Mendocino)
- Comment:
Intel 440LX
- Launch date: August 27, 1997
- FSB: 66 MHz
- Supported memory type: SDRAM
- Supported CPUs:
- Pentium II with 66 MHz FSB
- early Celerons (Covington, Mendocino)
- Comment:
- With this chipset AGP was introduced
Intel 440BX
Intel 440BX:
- Launch date: April 1998
- FSB: 66 and 100 MHz
- Supported memory type: SDRAM (PC66 and PC100)
- Supported CPUs:
- Pentium II with 66 and 100 MHz FSB
- Pentium III with 100 MHz FSB
- early Celerons (Covington, Mendocino, Coppermine)
VIA Apollo Pro 133A
- Launch year: 2000
- FSB: 66, 100, 133 MHz
- AGP 4x mode
- Support for all slot 1 CPUs
(With a suitable slotket, the faster, socketed Celerons and other Pentium III CPUs can also be used with many chipsets.)
Support for the Pentium III EB on Slot 1 mainboards
A special series of the Pentium III for slot 1 is designated with the addition EB . The "E" stands for the coppermine core and the "B" for a front side bus clocked at 133 MHz. Curiously, there is no chipset from Intel that officially supports 133 MHz FSB on slot 1. Since the Intel chipsets i820 and i840 are based on Slot1, but mostly have two Slot1 slots, this happened with the introduction of the Intel 800 series . i810E; i815; i815E; i820; i820E and i840 are at least partially manufactured as Slot1 versions. There are three possibilities to operate the EB slot 1 types of the Pentium III: Either you use a board with the VIA Apollo Pro 133A chipset , which is partly equipped with the faulty Southbridge 686B , or you operate it the i440BX chipset beyond its specification, which is quite possible with some boards in stable operation, or mainboards with chipset of the Intel 800 series are used.
Individual evidence
- ↑ a b c Intel Corporation: intel.com/museum (PDF 274kB)
- ↑ a b List of Intel chipsets in the English language Wikipedia - List of Intel chipsets, Pentium Pro / II / III
- ↑ a b VIA chipsets in the English language Wikipedia - List of VIA-P6 chipsets
- ↑ Intel Corporation: Slot 1 Processor Power Distribution Guidelines (PDF; 990 kB), 1997, page 26
- ↑ a b Slotket in the English language Wikipedia
- ↑ Intel Corporation: 440FX PCIset Datasheet
- ↑ Intel Corporation: 440LX AGPset Design Guide ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ↑ Intel 440BX in the English language Wikipedia
- ↑ Intel Corporation: 440BX AGPset Design Guide ( Memento of the original from October 4, 2012 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Heise News: VIA chipset corrupts data , from April 12, 2001
