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Matrox Parhelia 512 Preview
SpinnerBait writes "Finally, you don't have to sift through all the unreleased and unauthorized
bogus information around the net about Matrox's upcoming 3D Graphics chip,
called the Parhelia 512. Matrox has taken the wraps off their next
generation GPU and
this Preview over at HotHardware goes through its feature set with a fine
toothed comb.
They also give you a very rare glimpse inside Matrox's Montreal Headquarters,
as well as a look at some very impressive technology demos, rendered on their
new chip. Looks like impressive stuff for sure."
Kyle over at [H]ard|OCP has quite a load of info on the card:
h tm l
i s. html
http://www.hardocp.com/articles/parhelia/index.
http://www.hardocp.com/articles/parhelia/analys
Here are some more links with Parhelia info:
h tm l
w z? cid=3&aid=425
h om e.cfm
http://www.hardocp.com/articles/parhelia/index.
http://www.hardwarezone.com/articles/articles.h
http://www.matrox.com/mga/products/parhelia512/
I hope they make Linux drivers for it. Hardware text AA seems kinda cool.
Here
The summary mentions quite a few interesting notes regarding the effect this card would have on current games.
- In "simple" games like Quake III Arena, the Parhelia-512 will definitely lose out to the GeForce4 Ti 4600. By simple we mean games that generally use no more than two textures and are currently bound by fill rate. NVIDIA's drivers are highly optimized (much more so than Matrox's) and in situations where the majority of the Parhelia's execution power is going unused, it will lose out to the Ti 4600. This can change by turning on anisotropic filtering and antialiasing however, where the balance will begin to tilt in favor of the Parhelia.
- In stressful DX8 games, Matrox expects the Parhelia-512 to take the gold - either performing on par or outperforming the GeForce4 Ti 4600. Once again, as soon as you enable better texture filtering algorithms and antialiasing the Parhelia-512 should begin to seriously separate itself from the Ti 4600. The quad-texturing capabilities of the core as well as the 5-stage pixel shaders will be very handy in games coming out over the next several months.
So from the look of it, Parhelia does not wipe out Nvidia (though I would like them to), but is a worthy competitor to nvidia in current games. It would be interesting to see how ATI and Nvidia match up to this new competitor in the coming months.
Be afraid. Be vewy vewy afraid.
Rapid Nirvana
Well from reading a few artivles about needing more than 8bit per channel, its all down to bleading.
It's a bit like using 24bit sound recordings to mix and then downsampling them to 16bit.
thank God the internet isn't a human right.
MRP : Approximately 450 US Dollars.
And this would be for the fastest Matrox Card. There might be more than one flavour, but dont expect them to diversify it like Nvidia does (Ti200, Ti4400, Ti4600 and the MX420 and MX440).
Shipping Date : Late June
Rapid Nirvana
For those of you who don't already know, professional TV standards (specifically, D1, also known as SDI, though SDI is technically different) use 10-bit YCrCb video.
This means that any particular pixel may have up to 30 bits of color (even though the maximum difference between colors of pixels is less than that.
Obviously, this is not something that is easily accomplished with standard 24 bit/32 bit rendering. If you convert the SDI into something that can be represented in the frame buffer of the video card, then you've lost precision. This is unacceptable for broadcast! (And no, overlay isn't generally good enough since you want to capture the pixels for output though SDI)
Admittedly, this card isn't perfect- It would be nice to have 8 bits of destination alpha (for a key channel). 4 shades of keying just isn't enough...
In any case, having a card (finally!) support 10 bit rendering (especially the 10 bit rendering in openGL) in hardware will be wonderful!
Take a look at this explanation which explains what a parhelia is =)
interesting stuff
09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0
Untrue (with the exception of their woeful lowend capture cards) -- A few months back they released a new W2K driver which resolved a couple bugs with my ancient G400Max card and multi-head/TV-Out.
[...] but when you want to have a nice background, top is plain blue (#0000ff) and botton is black (#000000), then there are only 254 levels between those. And I can clearly see those lines where the blue color value changes.
Actually, you should make that black to blue to white. And while you'll manage to distinguish the colours at the centre of the scale (near "pure" blue), I doubt you'll be able to distinguish the colours at the top and bottom (near white and black).
The limitations of 24-bit colour can also be dealt with with dithering. Most high-end animation programs render internally at 48 / 64 bits per pixel (16 bits per component) and then dither the image when they convert it to 24-bpp (8-bpc). This would result in a much smoother transition from black to blue (and then to white), with no visible banding.
Most modern graphics cards already do real-time dithering, but only in 16-bit modes (which still work internally at 24 / 32).
RMN
~~~
- First off, Q3A is used as THE single standard metric to see how a card will perform under a common load. It's a very good way to judge the raw speed of a card overall, and often provides good pointers as to overall performance in fancier modes or other games, but it certainly doesn't mean every game you play will be 100+ fps.
- Second, that figure is an AVERAGE. When actually gaming, the average framerate is not the issue - the MINIMUM framerate is the killer. 60 fps average is fine, but when the framerate drops to 10-15 fps in a heavy firefight, you're in trouble. A higher average framerate usually translates to a higher minimum as well. In fact, many sites have taken to quoting minimums as well, or even showing a complete framerate graph.
- Third, the ability to manage 100 fps at e.g. 1024x768 means only around 40 fps at 1600x1200, if your monitor extends that far, or perhaps only 30 fps at 1024x768 with 4x AA if it doesn't. Your card will need to score 200 fps if you want to improve your resolution/AA, or maybe even 300 fps if you want to do that and still keep your minimum fps above 60.
- Fourth, the same argument applies to other quality improvements like trilinear and anisotropic filtering. Taking 32 texture samples instead of 4 can really kill your framerate, so you better hope you're getting enormous framerates with non-anisotropic filtering if you hope to get acceptable speed with anisotropic filtering enabled.
- Fifth, Q3A is not the only game out there. There are a lot of more demanding games available today, even those based on the Q3A engine like RtCW, that will give you much lower framerates.
Combining two or more of the above factors can bring the fastest graphics card to its knees, even if it scores 200 fps in Q3A. We'll have to wait until we see scores of 300 or 400 before we can expect to play Jedi Knight II at 1600x1200 with 9x AA and 16-sample anisotropic filtering, while never dropping below at least 30 fps. But boy, will it look good when we can :-)
Ideally, a review will give individual scores for all the above - high resolution, AA, anisotropic filtering, a range of modern games, and all combinations of the above. But since this would entail a vast amount of testing and a huge array of numbers, most reviews settle for a few known tests that are indicative of performance in other tests. And the most popular of those is good old Q3A.
Why would anyone engrave "Elbereth"?
Did you actually bother to read a manpage?
Your wrong.
'man X', under 'COLOR NAMES'
The syntax is an initial sharp sign character followed by a numeric specification, in one of the following formats:
#RGB (4 bits each)
#RRGGBB (8 bits each)
#RRRGGGBBB (12 bits each)
#RRRRGGGGBBBB (16 bits each)
As someone else pointed out, 10 bits of RGB does not equate to 10 bits of YUV. The Parhelia will give great 10 bit RGB previews (completely independant of output quality), and will even output a 10 bit YUV video signal - but only via S-Video, where the two colour signals get encoded together anyway. You need 10 bit component output, or 10 bit SDI, neither of which can be done by the Parhelia. It's more aimed at the 10 bit DVD market than a professional output solution.
The two-bit alpha limitation is largely irrelevant. For display on a monitor, RGB is all you need. Processing of deep-colour images should be done with at least 16 bits per component (including alpha) in memory for best results, then dithered down to 10 bit RGB for display. Key channel output requires a second video connector, so it won't do that at all.
Why would anyone engrave "Elbereth"?
Nope. Cones are sensitive to red, green and blue (hence the use of RGB in TVs). [...] Luminance really isn't that important.
I recommend reading a bit more on the subject before making such definitive statements. You can start with this:
Spectral sensitivity of the human eye
As you can see, at 650 nm (pure red), the cones are almost blind. The brain combines this information with what it gets from the rods (luminance) and realises that there is some colour there. And since it has no blue, almost no green and only a little yellow, it's translated to "red".
TVs use RGB (red,green,blue) just as they could use CMY (cyan,magenta,yellow) or any other group of complementary colours (of which there is an infinite number - any three colours that are 120 apart in a spectrum wheel will do). It has nothing to do with the actual wavelengths that the receptors in our eyes are tuned to.
You may also want to read some more about how TV colour signals are encoded (messy but interesting) and why current standards are as they are. Do a quick search on the internet and I'm sure you'll find plenty of pages about it.
RMN
~~~