The Radeon HD 4850 & 4870: AMD Wins at $199 and $299
by Anand Lal Shimpi & Derek Wilson on June 25, 2008 12:00 AM EST- Posted in
- GPUs
AA Comparison
And now the fun part: playing around with images. Certainly everyone has their own taste when it comes to AA, but we've cropped and blown up this 800x600 screenshot from Oblivion in order to better show what's really going on. As resolution increases and pixel size decreases, the impact of higher AA modes also decreases. This is useful to keep in mind here.
A few key points to check out: compare the interior of textures between either no AA image and any of AMD's tent filters. Notice how the detail on interior textures is significantly decreased. It can be quite frustrating to enable a high anisotropic filtering level to increase the detail of textures only to find them blurred by your AA mode. Also, note how NVIDIA's 8x CSAA and 16x CSAA modes only subtly change some of the pixels. This is because CSAA actually attempts to better understand the actual geometry that a pixel covers rather than going around looking for data outside the pixel to bring in.
These screenshots are with gamma correction enabled on NVIDIA hardware in order to give the best comparison with RV770 which does not allow us to disable gamma correction. We do prefer disabling gamma correction for the average case and especially for anti-aliasing thin lines.
Click the links in the table below to change the AA images displayed
AMD RV770 |
NVIDIA GT200 |
Click here to download all the full resolution, uncompressed images used in this comparison
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wilkinb - Wednesday, June 25, 2008 - link
Then include SLI for the 280... let the consumer care about what the value is or isn't, we all value different things. Provide the costs and the performance (SLI) please.Its make this very incomplete to not have included SLI for the 280/260, I for one will more then likely get 2 x GTX280's not all of us worry about a few $$, but if the CF 4870's are that good, then I want to know as I don’t care about the brand and will go with the best performance.
Can you please include them soon so we can make our own judgements on what's good or not?
Anand Lal Shimpi - Wednesday, June 25, 2008 - link
I've added the GTX 280 SLI numbers to all of the bar charts in the Multi-GPU section, enjoy :)Note, I didn't add them to the line graphs simply because we didn't have data for 280 SLI at lower resolutions. It only really makes sense at 2560 x 1600 anyways so this shouldn't be an issue.
Take care,
Anand
wilkinb - Wednesday, June 25, 2008 - link
thank you :)I really appreciate the response
Now I just need work out what to order.
paydirt - Thursday, June 26, 2008 - link
9800 GTX is $200. I wonder what price the GTX+ debuts at.Marciapax - Saturday, September 12, 2020 - link
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