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View Full Version : 7800GTX and HL2... wow!


PeterJensen
07-19-05, 02:41 AM
Wow, maybe this is old news but i just saw this over at techreport.com :p

http://www.techreport.com/etc/2005q3/hires-gaming/hl2-boat.gif
and

http://www.techreport.com/etc/2005q3/hires-gaming/hl2-town.gif

This really shows the power of the 7800GTX, i mean it's walking all over 2 x 6800ULTRA in SLI :eek:

You can read the article here : High res. gaming (http://www.techreport.com/etc/2005q3/hires-gaming/index.x?pg=1)

Edit: No remote linking please -ChrisRay

ChrisRay
07-19-05, 03:44 AM
The problem with that graph is the fact that the the 6800 Cards werent designed to compress zbuffer at such high resolutions. While in theory it may look really good for the 7800GTX. In reality it just means it looks bad for the 6800 SLI setup because they werent designed to to Z-compression at such high resolutions. The article explains this in further detail. And it is unlikey to ever effect a 6800 SLI solution at resolutions of 1600x1200 and below.. Meaning at 1600x1200 resolution 6800 SLI solutions will continue to keep pace usually.

So the NV40 and its derivatives in the GeForce 6 series are indeed limited to two-megapixel resolutions for Z culling. There are also "features and performance optimizations" on the NV40, beyond Z culling, that run out of steam at very high resolutions, although NVIDIA isn't willing to specify exactly what those features might be. NVIDIA aimed for a higher resolution design point for the G70, and sized its buffers (and perhaps caches) accordingly. That helps explain why the GeForce 7800 GTX shines so brightly at 2048x1536 compared to the competition.
Obviously, these issues could become more relevant as high-definition displays become more prominent. For reference, here's how some of the more common display resolutions stack up in terms of megapixels. (I'm assuming "mega" in this case means an even million.)

Big Ev
07-19-05, 03:57 PM
Half-Life 2 can run at 2048x1536?

I thought 1600x1200 was the max

leca
07-19-05, 05:40 PM
Half-Life 2 can run at 2048x1536?

I thought 1600x1200 was the max

It will run at any res you want it to :), your display(s) just has to support it :p