Radeon x800 Pro & XT (PE) -
Temporal Anti Aliasing
Temporal AA
Despite offering nothing extremely new, it's really two year old technology made faster, we do see something to get excited about in terms of new technology. A new Antialiasing mode was added in the drivers called Temporal AA. I must add that the entire R3x0 series is able to handle Temporal AA.
Antialiasing -> Simple explanation. This is to get rid of the "jaggies" on diagonal lines. Look at the picture below.
It boils down to this. To recover a signal, or image, you need a minimum of samples to be able to give a realistic representation of the image. The problems start with texture maps being either too close or too far away from the viewpoint. If the polygon is far away then you only have a limited number of points to show the texture map, so logically you have to drop a lot of the real pixels of your texture map.
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Antialiased line - If you draw a straight line (under an angle) using a paint program and you zoom in, you will discover that the line looks like a stairway. To remove this and make the line look like a line points in different colors are added to the side of the line to make it look more like a real line. |
This creates some sort of interlace effect : one line is shown and one is not. This can result in weird patterns appearing, and makes the texture map look completely different from the real one. A similar problem is if the polygon is close to you. You need more info than there is available, resulting in the generation of random noise (meaningless values).
One of the best features compared to the competition is ATI's approach towards Antialiasing. In the name of performance ATI introduced Temporal (time) AA.
This is a feature that has been an option ever since the introduction of the R3xx processors, however it has never been used, this AA mode is to use different sample patterns. In simple wording, you sample the source at many consecutive points in time and then combine the samples for final output. This method basically is rendering the image at a much higher framerate than the final display, and sampling down to the fewer final rendered images. ATI's method could, perhaps, be better described as a multi-pass spatial AA method, jittered AA, or even temporal dithering. The advantage? Get this, 2x Temporal AA offers about the same quality as 4xAA while requiring only the performance of 2xAA.
The big downside of Temporal AA is that when framerates drop very low you'll notice an effect that is irritating, flickering. That means that most new games that demand a lot of the graphics core, or systems that are not powerful enough to cough up high framerates are not well suited for this AA technology at all. This will never be ATI's primary AA technology.
Unfortunately, due to the obligatory V-Sync, this AA mode cannot be benchmarked correctly.
Today's tested product is the shaggy Radeon X1950 Pro which comes with the newer IceQ3 cooling solution; a review on ATI's latest 12-pipe mid-range product which obviously was based off the R580 silicon, and is quite frankly a very credible graphics card as you'll learn in this article. The card features 36 Pixel Shaders units. And for roughly $219-239 you can pickup the 256MB version already.
Radeon X1650 XT & X1950 Pro & Crossfire
Primarily this is a Radeon X1650 XT Crossfire article, yet with included X1950 Pro Crossfire results as well. Ever since NVIDIA released the GeForce 7600 GS/GT cards earlier this year ATI has had a very rough time delivering a product that offers the same performance. They constantly were close but not close enough. ATI worked hard to finish up its new 80 nanometer products and despite a delay of all the 80 nanometer chips, it is finally ready in good quantities. The Radeon X1950 Pro for example is such a product.
HiS Radeon X1650 PRO review
The Radeon X1650 Pro utilizes the ATI RV535 graphics core, a new revision of the RV530 which was the basis of the X1600 series. What's new then you are asking ? Uhm, well nothing except a newer 80nm fabrication process. That 80nm process ensures cheaper production of the silicon and more importantly less heat and likely lower graphics core voltages. That means you can clock the core faster, which was done quite insignificantly for this model but the increase is there.
Radeon X1950 Pro 512MB Review
So today we'll be looking at the rather lovely Radeon X1950 Pro from this company, a review on ATI's latest 12-pipe mid-range product which obviously was based off the R580 silicon, and quite frankly is a very credible graphics card as you'll learn in this article. The card features 36 Pixel Shaders units. For $199 you can pickup the 256MB version already, it sounds like a great deal as it should offer at least twice the performance of a X1600 Pro.