Matrox Parhelia-512 is a
graphics processing unit
A graphics processing unit (GPU) is a specialized electronic circuit designed to manipulate and alter memory to accelerate the creation of images in a frame buffer intended for output to a display device. GPUs are used in embedded systems, m ...
(GPU) with full support for
DirectX
Microsoft DirectX is a collection of application programming interfaces (APIs) for handling tasks related to multimedia, especially game programming and video, on Microsoft platforms. Originally, the names of these APIs all began with "Direct" ...
8.1 and incorporating several DirectX 9.0 features. Released in 2002, it was best known for its ability to drive three monitors ("Surround Gaming") and its ''Coral Reef'' tech demo.
As had happened with previous Matrox products, the Parhelia was released just before competing companies released cards that completely outperformed it. In this case it was the
ATI Radeon 9700, released only a few months later. The Parhelia remained a niche product, and was Matrox's last major effort to sell into the consumer market.
Background
The Parhelia series was
Matrox's attempt to return to the market after a long hiatus, their first significant effort since the
G200 and
G400 lines had become uncompetitive. Their other post-''G400'' products, G450 and G550, were cost-reduced revisions of ''G400'' technology and were not competitive with
ATI's Radeon or
NVIDIA's GeForce lines with regards to
3D computer graphics
3D computer graphics, or “3D graphics,” sometimes called CGI, 3D-CGI or three-dimensional computer graphics are graphics that use a three-dimensional representation of geometric data (often Cartesian) that is stored in the computer for th ...
.
Description
Features
The Parhelia-512 was the first GPU by Matrox to be equipped with a 256-bit memory bus, giving it an advantage over other cards of the time in the area of memory bandwidth. The "-512" suffix refers to the 512-bit ring bus. The Parhelia processor featured Glyph acceleration, where anti-aliasing of text was accelerated by the hardware.
Parhelia-512 includes 4 32×4
vertex shaders with dedicated
displacement mapping engine, pixel shader array with 4 texturing unit and 5-stage pixel shader per pixel pipeline. It supports 16× fragment
anti-aliasing, all of which were featured prominently in Matrox's ''Coral Reef'' technical demo.
Display controller component supports 10-bit color frame buffer (called "Gigacolor") with 10-bit 400 MHz RAMDACs on 2 RGB ports and 230 MHz RAMDAC on TV encoder port, which was an improvement over its competitors. The frame buffer is in RGBA (10:10:10:2) format, and supports full gamma correction. Dual link TMDS is supported via external controller connected to the digital interface.
Memory controller supports 256-bit DDR SDRAM.
The "Surround Gaming" support allowed the card to drive three monitors creating a unique level gaming immersion. For example, in a flight simulator or
sim racing, the middle monitor could show the windshield while the left and right monitors could display the side views (offering
peripheral vision). However, only 2 displays can be controlled independently.
Video cards
The cards were released in 2002, simply called Matrox Parhelia, initially came with 128 or 256 MiB memory. Retail cards are clocked 220 MHz core, 275 MHz memory; OEM cards are clocked 200 MHz core, 250 MHz memory.
To further improve analog image quality, 5th order
low-pass filters
A low-pass filter is a filter that passes signals with a frequency lower than a selected cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency. The exact frequency response of the filter depends on the filter des ...
are used.
Performance
For a top-of-the-line, and rather expensive card ($399
USD), the Matrox Parhelia's 3D gaming performance was well behind
NVIDIA
Nvidia CorporationOfficially written as NVIDIA and stylized in its logo as VIDIA with the lowercase "n" the same height as the uppercase "VIDIA"; formerly stylized as VIDIA with a large italicized lowercase "n" on products from the mid 1990s to ...
's older and similarly priced
GeForce 4 Ti 4600. The Parhelia was only competitive with the older
Radeon 8500
The R200 is the second generation of GPUs used in Radeon graphics cards and developed by ATI Technologies. This GPU features 3D acceleration based upon Microsoft Direct3D 8.1 and OpenGL 1.3, a major improvement in features and performance ...
and
GeForce 3, which typically cost half as much. The Parhelia's potent performance was held back by its comparatively low GPU clock speed (220 MHz for retail model, 200 MHz for OEM and 256 MB models), initially believed by many commentators to be due to the large (for that time-frame) transistor count. However, ATI's
Radeon 9700 was released later that year, with a considerably larger transistor count (108 million vs. 80 million), on the same 150 nm
chip fabrication
Semiconductor device fabrication is the process used to manufacture semiconductor devices, typically integrated circuit (IC) chips such as modern computer processors, microcontrollers, and memory chips such as NAND flash and DRAM that are pres ...
process, yet managed a substantially higher clock (325 MHz vs. 250 MHz).
The card's
fillrate
In computer graphics, a video card's pixel fillrate refers to the number of pixels that can be rendered on the screen and written to video memory in one second. Pixel fillrates are given in megapixels per second or in gigapixels per second (in ...
performance was formidable in games that used many texture layers; though equipped with just 4 pixel pipelines, each had 4 texture units. This proved not to be an efficient arrangement in most situations. Parhelia was also hampered by poor bandwidth conserving technologies/techniques; ATI introduced their 3rd gen
HyperZ
HyperZ is the brand for a set of processing techniques developed by ATI Technologies and later Advanced Micro Devices and implemented in their Radeon-GPUs. HyperZ was announced in November 2000 and was still available in the TeraScale-based Rad ...
in Radeon 9700, NVIDIA touted
Lightning Memory Architecture 2 for the GeForce 4 series, Matrox had no similarly comprehensive optimization approach. While the Parhelia possessed an impressive raw memory bandwidth much of it was wasted on invisible house-keeping tasks because the card lacked the ability to predict overdraw or compress z-buffer data, among other inefficiencies. Some writers believed Parhelia to have a "crippled" triangle-setup engine that starved the rest of the chip in typical 3D rendering task
Later in Parhelia's life, when DirectX 9 applications were becoming quite prevalent, Matrox acknowledged that the vertex shaders were not Shader Model 2.0 capable, and as such not DirectX 9-compliant, as was initially advertised. Presumably there were several bugs within the Parhelia core that could not be worked around in the drivers. However, it was all a bit of a moot point because Parhelia's performance was not adequate to drive most DirectX 9-supporting titles well even without more complex shader code weighing the card down.
Sales
Despite the lackluster performance for its price, Matrox hoped to win over enthusiasts with the Parhelia's unique and high quality features, such as "Surround Gaming", glyph acceleration, high resolutions, and 16x fragment anti-aliasing. In these aspects, some reviewers suggested that Parhelia could have been a compelling alternative to the comparably priced GeForce 4 Ti 4600 ($399
USD), which was the performance leader but only DirectX 8.1 compliant.
However, within a few months after release, the Parhelia was completely overshadowed by
ATI Technologies, ATI's far faster and fully DirectX 9.0 compliant
Radeon 9700. The Radeon 9700 was faster and produced higher quality 3D images, while debuting at the same price as the Parhelia ($399
USD). Due to their equivalent pricing against faster cards, the Parhelia never got a significant hold in the market. It remained a niche product, while nVidia and ATI control the majority of the discrete graphics chip market.
Parhelia-LX
After the launch of Parhelia-512, Matrox released Parhelia-LX, which supports only 128-bit memory and has only 2 pixel pipelines. The first video cards using it included Matrox Millennium P650 and Millennium P750.
Future products
Originally, Matrox planned to produce the "Parhelia 2" successor, codenamed "Pitou". However, when Parhelia-512 failed to compete in the gaming market, the project was never again mentioned and Matrox left the gaming market altogether by 2003.
Parhelia processors were later upgraded to support AGP 8×, and PCI Express.
In 2006, Matrox re-introduced Surround Gaming with their ''TripleHead2Go'', which utilizing the existing GPU to render 3D graphics, splitting the resulting image over three screens. Certified products include
ATI Technologies, ATI and
NVIDIA
Nvidia CorporationOfficially written as NVIDIA and stylized in its logo as VIDIA with the lowercase "n" the same height as the uppercase "VIDIA"; formerly stylized as VIDIA with a large italicized lowercase "n" on products from the mid 1990s to ...
(and later Intel) processors.
With the introduction of Millennium P690 in 2007, it was die-shrunk to 90 nm, and supports DDR2 memory. Windows Vista is supported under XP Driver Model.
In June 2008, Matrox announced the release of M-Series video cards. It has the advertised single-chip quad head support. Unlike previous products, it supports Windows Vista Aero acceleration.
In 2014, Matrox announced the next line of multi-display graphics cards would be based on 28nm AMD GPUs with Graphics Core Next technologies with DirectX 11.2, OpenGL 4.4 and OpenCL 1.2 compatibility; shader model 5.0; PCI Express 3.0 and 128-bit memory interface. The first AMD-based products, Matrox C420 and C680, was set to be available in Q4 2014.
Matrox Unveils Quad and Six-Head PCI Express Graphics Cards
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References
External links
Trusted Reviews - Apple 30in Cinema Display & Matrox Parhelia DL256
{{Graphics Processing Unit
Graphics processing units
Graphics cards
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