NVIDIA's GeForce 7800 GTX Hits The Ground Running
by Derek Wilson on June 22, 2005 9:00 AM EST- Posted in
- GPUs
Transparency AA, Purevideo, and HDTV
On of the problems with Multisample AA is its inability to correct aliasing within a polygon. One of the main new features that NVIDIA added to the G70 is a method to combat the most notorious problem associated with MSAA: antialiasing of transparent textures.When transparency AA is enabled on a GeForce 7800 GTX, textures that make use of the alpha channel can be flagged to have either supersample or multisample AA performed inside the texture. This can help a great deal for features often implemented with transparent textures such as leaves, vegetation or chain link fences.
This affords an increased performance hit along with its higher image quality, but no longer will fences, bushes, and trees cause a marked decrease in image quality even while running 4xAA. We will explore the performance hit and quality of Transparency AA in our analysis of the hardware, but NVIDIA provides the option of running with either SSAA or MSAA in this mode. MSAA incurs less of a performance hit, but SSAA is higher quality. We are glad that the choice is left to the end user and would even prefer that we get the choice in how FSAA is performed as well.
With increasingly powerful hardware we can afford to "waste" some cycles on SS in order to achieve slightly higher image quality in game that are severely CPU bound. Check out our recent Insider Article on NVIDIA's upcoming introduction of a 16x AA mode for 7800 GTX SLI systems. We will test this mode as soon as NVIDIA offers a driver with support for it.
This time around, Purevideo has extended support for HD format acceleration. The 7800 GTX will now have support for spatial-temporal de-interlacing for HD content. This feature promises to make 1080i content look that much better on a PC. NVIDIA has also said that the 7800 GTX should support H.264, but have said that the driver will not have support until near year's end. As we have already seen an H.264 demo from ATI, and the lack of anything tangible from NVIDIA at this point is disappointing. We are hesitant to even mention NVIDIA's claimed "support" before we see it running on actual hardware (especially after the lacking and late Purevideo support for initial NV40 parts). This time around, we can expect more support for alternate video players from NVIDIA as they are working with InterVideo and Cyberlink.
Not tied to the 7800 GTX is NVIDIA's latest improvement on HDTV support in their 75 series drivers (also launching today). Over time support for fitting a PC's output to any HDTV has improved, but this latest update makes it that much easier to deal with. Providing sliders and a full screen underscan adjustment feature is long overdue, but we still wish modern hardware could provide a more fully featured plug and play environment for HDTV.
We will also be getting some Windows MCE extensions that make HDTV setups easier to configure as well. If the US can manage to keep broadcast flags off the law books, public support for and adoption of digital television services and computers as media center boxes will surely continue to grow and prosper.
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VIAN - Wednesday, June 22, 2005 - link
"NVIDIA sees texture bandwidth as outweighing color and z bandwidth in the not too distant future." That was a quote from the article after saying that Nvidia was focusing less on Memory Bandwidth.Do these two statements not match or is there something I'm not aware of.
obeseotron - Wednesday, June 22, 2005 - link
These benchmarks are pretty clearly rushed out and wrong, or at least improperly attributed to the wrong hardware. SLI 6800 show up faster than SLI 7800's in many benchmarks, in some cases much more than doubling single 6800 scores. I understand NDAs suck with the limited amount of time to produce a review, but I'd rather it have not been posted until the afternoon than ignore the benchmarks section.IronChefMoto - Wednesday, June 22, 2005 - link
#28 -- Mlittl3 can't pronounce Penske or terran properly, and he's giving out grammar advice? Sad. ;)SDA - Wednesday, June 22, 2005 - link
QUESTIONOkay, allcaps=obnoxious. But I do have a question. How was system power consumption measured? That is, was the draw of the computer at the wall measured, or was the draw on the PSU measured? In other words, did you measure how much power the PSU drew from the wall or how much power the components drew from the PSU?
Aikouka - Wednesday, June 22, 2005 - link
Wow, I'm simply amazed. I said to someone as soon as I saw this "Wow, now I feel bad that I just bought a 6800GT ... but at least they won't be available for 1 or 2 months." Then I look and see that retailers already have them! I was shocked to say the least.RyDogg1 - Wednesday, June 22, 2005 - link
But my question was "who," was buying them. I'm a hardware goon as much as the next guy, but everyone knows that in 6-12 months, the next gen is out and price is lower on these. I mean the benches are presenting comparisons with cards that according to the article are close to a year old. Obviously some sucker lays down the cash because the "premium," price is way too high for a common consumer.Maybe this one of the factors that will lead to the Xbox360/PS3 becoming the new gaming standard as opposed to the Video Card market pushing the envelope.
geekfool - Wednesday, June 22, 2005 - link
What no Crossfire benchies? I guess they didn't wany Nvidia to loose on their big launch day.Lonyo - Wednesday, June 22, 2005 - link
The initial 6800U's cost lots because of price gouging.They were in very limited supply, so people hiked up the prices.
The MSRP of these cards is $600, and they are available.
MSRP of the 6800U's was $500, the sellers then inflated prices.
Lifted - Wednesday, June 22, 2005 - link
#24: In the Wolfenstein graph they obviously reversed the 7800 GTX SLI with the Radeon.They only reveresed a couple of labels here and there, chill out. It's still VERY OBVIOUS which card is which just by looking at the performance!
WAKE UP SLEEPY HEADS.
mlittl3 - Wednesday, June 22, 2005 - link
Derek,I know this article must have been rushed out but it needs EXTREME proofreading. As many have said in the other comments above, the results need to be carefully gone over to get the right numbers in the right place.
There is no way that the ATI card can go from just under 75 fps at 1600x1200 to over 100 fps at 2048x1535 in Enemy Territory.
Also, the Final Words heading is part of the paragraph text instead of a bold heading above it.
There are other grammatical errors too but those aren't as important as the erroneous data. Plus, a little analysis of each of the benchmark results for each game would be nice but not necessary.
Please go over each graph and make sure the numbers are right.