VideoLogic's KYRO 3 Chipset?
||KYRO 3 will be the
first chip in the PowerVR Series4 family. It has not been announced yet,
but we will consider it's possible specifications.
Click to Enlarge
The block diagram on the left represents
the PowerVR Series4 chipset, that VideoLogic has mentioned in the past.
Notice it has four rendering pipelines, and a transformation and lighting
(T&L) unit. That diagram was released quite awhile back, so the PowerVR
Series4 chipset that will be released may have differences.
Those shaders listed are important if
the KYRO architecture is to be Direct X 8 compliant, as without those features,
it can only claim to be Direct X 8 compatible.
GPU core clocked at 250 MHz?
DDR SDRAM clocked at 250 MHz?
128-bit memory data path?
8 GB/s memory bandwidth?
1000 megatexels per second (1000
Vertex Shader Processor
Pixel Shader Processor
On the diagram it shows a block that
says BIST, and that stands for Build In Self Test, which allows some self
diagnostic after manufacturing to see if the chip is functional. This helps
reduce testing costs.
March 18th, 2002
interviewed David Harold, PR Manager of PowerVR Technologies, who had this
Q: Speaking of upcoming
products, how far in development is Series 4?
June 22nd, 2001
A: Well in fact series 4 is
done, ready to be produced! However, you know the situation around ST.
We need to wait until ST makes a deal, or not. When they can make a deal,
we can start producing Series 4. If they cannot sell their graphics department,
we have another issue. And maybe we are going to work with others. But
this is all speculation, as I don't know how far ST is in their deals.
You just have to wait and see what is going to happen.
Editor's note - we all know there
are rumors of Via buying ST's graphics division. How far the deal is, nobody
Q: What kind of performance
can we expect of Series 4? High end or Midrange?
A: The performance is actually
in the high end section. However, the longer the situation around ST keeps
going on, we have to wait until the new part can be shipped. So if we would
ship the product now, the card is really a high end part, but if we have
to wait another 3 months we are back in the mid-end.
From a message board post
at Ace's Hardware comes great news that the KYRO 3 will have hardware support
for DirectX 8 pixel and vertex shaders!
David Harold, PR-manager
of Imagination Technologies, told the german game magazine PC Action that
the kyro3 GPU besides a T&L-Pipeline and 4 rendering pipelines will
also have support for programmable directx8 pixel- and vertex-shader.
Above post was mentioned in this
Ace's Hardware news article.
Support for DDR-RAM was also confirmed.
The magazine also writes that the official announcement of the kyro3 will
not be before november.
The game mags homepage: www.pcaction.de,
the info is in its
Information is from: www.3dconcept.ch/cgi-bin/show.cgi?show=2468
where you will also find a chart with (now official) kyro family specs.
June 9th, 2001
More interesting news on KYRO 3,
courtesy of ExtremeTech:
Imagination and ST plan
a more important product by the end of 2001, the STG5500. Fu described
the new core as a complete redesign, designed to provide three times the
performance of the 4000 series.
The STG5500 will feature four
pixel-processing pipelines, as well as a hardware-based transformation
and lighting engine. While the hardware T&L will nominally place the
Kyro on par with the latest Radeon and GeForce chips, Fu did not say if
the engine will be programmable, a benefit Nvidia touts.
The STG5500 may be branded as
"Kyro 3," Fu said. The chip will shift to a 0.13-micron manufacturing process,
while the core speed will be increased to about 250 MHz, he said. Because
the Kyro's tiling architecture reduces the required memory bandwidth, the
STG 4xxx-series parts have used cheaper single-data-rate memory, Fu said.
But the STG5500's new core will require the increased bandwidth of DDR
memory. The chip will support up to 64 Mbytes of frame buffer DRAM, consistent
with earlier versions.
Imagination Technologies site