New Drivers From NVIDIA Change The Landscape

Today, NVIDIA will release it's new 185 series driver. This driver not only enables support for the GTX 275, but affects performance in parts across NVIDIA's lineup in a good number of games. We retested our NVIDIA cards with the 185 driver and saw some very interesting results. For example, take a look at before and after performance with Race Driver: GRID.

As we can clearly see, in the cards we tested, performance decreased at lower resolutions and increased at 2560x1600. This seemed to be the biggest example, but we saw flattened resolution scaling in most of the games we tested. This definitely could affect the competitiveness of the part depending on whether we are looking at low or high resolutions.

Some trade off was made to improve performance at ultra high resolutions at the expense of performance at lower resolutions. It could be a simple thing like creating more driver overhead (and more CPU limitation) to something much more complex. We haven't been told exactly what creates this situation though. With higher end hardware, this decision makes sense as resolutions lower than 2560x1600 tend to perform fine. 2560x1600 is more GPU limited and could benefit from a boost in most games.

Significantly different resolution scaling characteristics can be appealing to different users. An AMD card might look better at one resolution, while the NVIDIA card could come out on top with another. In general, we think these changes make sense, but it might be nicer if the driver automatically figured out what approach was best based on the hardware and resolution running (and thus didn't degrade performance at lower resolutions).

In addition to the performance changes, we see the addition of a new feature. In the past we've seen the addition of filtering techniques, optimizations, and even dynamic manipulation of geometry to the driver. Some features have stuck and some just faded away. One of the most popular additions to the driver was the ability to force Full Screen Antialiasing (FSAA) enabling smoother edges in games. This features was more important at a time when most games didn't have an in-game way to enable AA. The driver took over and implemented AA even on games that didn't offer an option to adjust it. Today the opposite is true and most games allow us to enable and adjust AA.

Now we have the ability to enable a feature, which isn't available natively in many games, that could either be loved or hated. You tell us which.

Introducing driver enabled Ambient Occlusion.

What is Ambient Occlusion you ask? Well, look into a corner or around trim or anywhere that looks concave in general. These areas will be a bit darker than the surrounding areas (depending on the depth and other factors), and NVIDIA has included a way to simulate this effect in it's 185 series driver. Here is an example of what AO can do:

Here's an example of what AO generally looks like in games:

This, as with other driver enabled features, significantly impacts performance and might not be able to run on all games or at all resolutions. Ambient Occlusion may be something some gamers like and some do not depending on the visual impact it has on a specific game or if performance remains acceptable. There are already games that make use of ambient occlusion, and some games that NVIDIA hasn't been able to implement AO on.

There are different methods to enable the rendering of an ambient occlusion effect, and NVIDIA implements a technique called Horizon Based Ambient Occlusion (HBAO for short). The advantage is that this method is likely very highly optimized to run well on NVIDIA hardware, but on the down side, developers limit the ultimate quality and technique used for AO if they leave it to NVIDIA to handle. On top of that, if a developer wants to guarantee that the feature work for everyone, they would need implement it themselves as AMD doesn't offer a parallel solution in their drivers (in spite of the fact that they are easily capable of running AO shaders).

We haven't done extensive testing with this feature yet, either looking for quality or performance. Only time will tell if this addition ends up being gimmicky or really hits home with gamers. And if more developers create games that natively support the feature we wouldn't even need the option. But it is always nice to have something new and unique to play around with, and we are happy to see NVIDIA pushing effects in games forward by all means possible even to the point of including effects like this in their driver.

In our opinion, lighting effects like this belong in engine and game code rather than the driver, but until that happens it's always great to have an alternative. We wouldn't think it a bad idea if AMD picked up on this and did it too, but whether it is more worth it to do this or spend that energy encouraging developers to adopt this and comparable techniques for more complex writing is totally up to AMD. And we wouldn't fault them either way.

Index The Cards and The Test
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  • Psyside - Thursday, April 2, 2009 - link

    Can anyone tell me about the testing metod average or maximum fps? thanks.
  • Jamahl - Thursday, April 2, 2009 - link

    some sites have the gtx275 clearly winning at all games, all resolutions.
  • helldrell666 - Thursday, April 2, 2009 - link

    You can't trust every site you check.especially since most of those sites don't post their funders names on their main page.You must've heard of Hardocp's Kyle who was fired by nvidia because he mentioned that the gtx250 is a renamed 9800gtx.
  • 7Enigma - Thursday, April 2, 2009 - link

    I think this is due to Nvidia shooting themselves in the leg with the 185 drivers. With the performance penalty at the normal resolutions, anyone testing with the 185's is going to get lower results than someone testing with the previous drivers. And I'm sure you could find 10 games that all perform better on ATI/NVIDIA. That's the problem with game selection and the only real answer is what types of games you play and what engines you think will be used heavily for the next 2 years.
  • SiliconDoc - Monday, April 6, 2009 - link

    Well the REAL ANSWER is - if you play at 2650, or even if you don't, and have been a red raging babbling lying idiot red rooster for 6 months plus pretending along with Derek that 2650x is the only thing that matters, now you have a driver for NVidia that whips the ati top dog core...
    If you're ready to reverse 6 months of red ranting and raving for 2560X ati wins it all, just keep the prior NV driver, so the red roosters screaming they now win because they suddenly are stuck at the LOWER REZ tier to claim a win, can be blasted to pieces anyway- at that resolution.
    So - NVidia now has a driver choice - the new for the high rez crown they took from the red fanboy ragers, and the prior driver which SPANKS THE RED CARD AGAIN at the lower rez.
    Make sure to collude with all the raging red roosters to keep that as hush hush as possible.
    1. spank the 790 at lower rezz with the older Nvidia driver
    2. spank the 790 at the highest rez with the new driver
    _______________________

    Don't worry if you can't understand just keep hopping around flapping those litttle wings and clucking so that red gobbler jouces around - don't worry soft PhysX can display that flabby flapper !
  • The0ne - Tuesday, April 7, 2009 - link

    Can someone ban this freaking idiot. The last few posts of his have been nothing but moronic, senseless rants. Jesus Christ, buy a gun and shoot yourself already.
  • SiliconDoc - Tuesday, April 7, 2009 - link

    Ahh, you don't like the points, so now you want death. Perhaps you should be banned, mr death wisher.
    If you don't like the DOZENS of valid points I made, TOO BAD - because you have no response - now you sound like krz1000 and his endless list of names, the looney red rooster that screeches the same thing you just did, then posts a link to youtube with a freaky slaughter video.
    If I wasn't here, the endless LIES would go unopposed, now GO BACK and respond to my points LIKE MAN, if you have anything, which no doubt, you do not.
  • helldrell666 - Thursday, April 2, 2009 - link

    According to xbitlabs, the 4890 beats the gtx285 at 1920x1200 resolution with 4x aa in Cod5, Crysis Warhead, Stalker CS, Fallout 3 and loses in Far Cry2.Here, the 4890 matches in Far Cry 2 and cod5 with some slightly lower fps than the gtx285 in Crysis warhead.

    Strange....
  • 7Enigma - Thursday, April 2, 2009 - link

    That is crazy. There is no way variations should be that huge between the 2 tests, regardless of the area they chose to test in the game. Anandtech has it as essentially a wash, while Xbit has the 4890 20% faster!?! (COD:WaW)
  • 7Enigma - Thursday, April 2, 2009 - link

    Just looked closer at the Xbitlabs review. The card they used was an OC variant that had 900MHz core instead of the stock 850MHz. In certain games that are not super graphically intensive I'm willing to bet at 1920X1200 they may still be core starved and not memory starved so a 50MHz increase may explain the discrepancy.

    I've got to admit you need to take the Xbitlabs article with a grain of salt if they are using the OC variant as the base 4890 in all of their charts....that's pretty shady...

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