2004-02-02 Intel Pentium 4E Also known as Prescott launches at 2.8 ($178), 3.0 ($218), 3.2 ($278) and 3.4 ($417) GHz with a 800 MHz front side bus and is built using a seven layer, Low-K, 90 nm Strained Silicon process.
Builds on the Netburst architecture, but adds "PNI" or Prescott New Instructions, which includes 11 new instructions, and LaGrande, a new security interface to go with Microsoft's Palladium. Also includes an improved pre-fetch branch predictor, improved HyperThreading, doubled L1 data cache size, doubled RAT History table size and advanced power manangement.
Will use Canterwood to start with, but in Q2 it will add the 64-bit CT Technology, move to Grantsdale and use the LGA775 socket.
Celeron Prescotts will be launched in Q2. Prescott reach 4 GHz in 2004-Q4 (now moved to 2005-Q1).
Now renamed Pentium 4E.
2004-06-21 Intel Grantsdale 910/915 Desktop chipset for Prescott and Tejas (the Socket T or LGA775 processors). Supports DDR-II SDRAM (400/533) and the ICH6 south bridge. Graphics is enhanced with DX9 and DVI support, dual displays, faster graphics access etc and is called "Graphics Media Accelerator 900" (or GMA900), formerly known as "Intel Extreme Graphics 3". Will be launched as
- 915P ($37)
- 910PL: "light" (05-Q1: $23)
- 915G: added graphics ($41)
- 915GV: value graphics (Q3, $37)
- 910GL: value graphics "light" (05-Q1: $27)
2004-06-21 PCI Express PC interconnect formerly known as 3GIO. Evolved from PCI and the physical interface of InfiniBand to a serial high bandwidth interface which will be used both as a PCI / AGP replacement and for chip to chip communications. Runs at 2.5 GHz and 0.8 V today, but will move to 5 GHz in PCI Express 2 in 2007-2008, and later to 10 GHz. Provides independent channels for each direction. Multiple bus widths are available:
- 1bit, x1: 250 MB/s (312 MB/s raw), 8 pins. PCI replacement
- 4bit, x4: 1 GB/s, 20 pins
- 8bit, x8: 2 GB/s, 40 pins
- 12bit, x12: ? pins
- 16bit, x16: 4 GB/s, 80 pins. Replacement for AGP and connects to the North Bridge
- 32bit, x32: ? pins
"PCI Express currently runs at 2.5Gtps, or 250MBps per lane in each direction, providing a total bandwidth of 16GBps in a 32-lane configuration. Future frequency increases will scale up total bandwidth to the limits of copper and significantly beyond that via other media without impacting any layers above the Physical Layer in the protocol stack."
Will also spawn a successor to the PCMCIA (PC-Card, CardBus) slot, 3GIO-M, Newcard or ExpressCard, which includes both PCI Express and USB 2.0 interfaces.
2005-Q2 Intel Tejas Successor to Prescott likely to be called Pentium V built on a 90 nm process, supporting IA-32e, DDR-II and PCI Express. Runs cooler and quiter than current chips. Uses a new LGA775 socket, with a 1066 MHz bus and starts at around 4.5 GHz, moving to around 9 before it is canceled. To include the 8 new "Tejas New Instructions" aka Azalia (Azalea), for improved audio multistreaming, speech recognition, Dolby Digital etc. Also includes "Extended Enhanced HyperThreading"...
Uses dual channel DDR-II DRAM at 533 MHz and the Alderwood and Grantsdale chipsets.
Will later be built in a 65 nm process, with a size of 80-100 mm2. The 65 nm version will get 2 MB of L2 cache on chip.
Earlier listed for a 04-Q4 launch, but recent news claim Prescott delays have moved the launch into 2005.
Tejas is canned in favor of Merom / Conroe.