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Editorial: Taking the SLI Plunge...
Date Published:
11-03-2005
Written By:
Diceman
Sponsored By:
N/A
Discuss Article:
VH Forum link
Pages: 1 2 3 4


 
 



Software:


Nvidia SLI Configuration

   As far as software installation goes, there really isn't much, but it should be done right. The first thing I did after startup was notice that the current Nvidia drivers I had installed (I believe they were Forceware 81.85) had automatically detected my dual video cards and pointed me to the Nvidia Software to Enable SLI. I went ahead and checked the two boxes and immediately started up my favorite FPS game (F.E.A.R).

   I immediately noticed a large and completely invasive bar graph on the left side of my screen covering pretty much top to bottom. I was like "$!@#!@". It then dawned on me what it must be. It must've been one of the two boxes I checked off in the SLI configuration.

   One checkbox is for "Enable SLI Multi-GPU"

   The other checkbox says "Show GPU Load Balancing" and states below it that "load balancing will be shown in DirectX and OpenGL applications"

   Yea, the "will be SHOWN" got me thinking that had to be it also. So I unchecked it and fired up F.E.A.R again and it was gone....hurray.

Test Sessions:

   However one thing I didn't mention about SLI and F.E.A.R for me just yet is the fact that for some reason I get a screen freeze while exiting the game now. It ran perfectly fine with one card, now I went to two cards and, although it'll fire up and I can play it just fine, when I go to exit back to desktop, it freezes up my computer and I have to hit the reset button! Talk about driving me crazy right off the bat.

   Since F.E.A.R was the only game I tested so far, I decided to fire up some of the other new games I have installed. Quake4 was next and guess what...it ran perfectly, including back to desktop. Hmm. That makes me scratch my head a bit.

   So I fire up DOOM3 and same thing, runs perfectly (gorgeous) and no problems at all.

   So I continue to fire up other games. UT2004 was next and ran just beautifully. Half Life 2 was next and also no problems.

  Here's some UT2004 screenshots I resized from 1680x1050 resolution down to half size so you can get a better view of them. UT2004 is still one of my favorite games. What a gorgeous game. FPS can be seen in yellow at lower right of screenshot.


UT2004

UT2004

UT2004

UT2004

   At this point It's pretty obvious it's something to do with F.E.A.R and not my system. However I decide to completely reinstall the 81.85 drivers (which I recommend anyway). It didn't help the F.E.A.R freezing situation.

   I then decided to reinstall the entire F.E.A.R game and that didn't help either. You can imagine all this trial and error and lots of hard reboots for this ONE GAME was really ticking me off now....heh.

   I decide to leave it be for now and run some other benchmarks and see what this new found graphic horsepower is doing for me.


3DMark05 Pre-SLI

3DMark05 Post-SLI

Doom3 1024 - SLI

Doom3 1280 - SLI

F.E.A.R 1152  Pre-SLI

F.E.A.R 1152 Post-SLI

F.E.A.R Settings Maxed

F.E.A.R Settings Maxed
 
 
Conclusion:
 
   As you can see with the test results SLI certainly makes a difference, especially in the 3DMark05 results. But who cares about synthetic results right? I want to see some real improvements.
 
   One thing to note about the above results is from DOOM3. This game is frame rate capped at 60fps and it's really difficult to see any improvement by looking at strictly frame rates as we would normally do in benchmarking.
 
   This was also the problem with benchmarking Quake 4. Not to mention the fact that there was no "timedemo" included in Quake 4 (THANKS ID!#@). What I can state about my experience in testing quake 4 in SLI was the fact that I was able to run 1280x1024 resolution with everything maxed out in the graphics settings including 16x filtering!! I will tell you that it brought my system down to 15-20fps though! It is currently the only game I have right now, that I know of, that is capable of bringing it to a halt. Although I will say that the graphics were stunningly crisp at those settings ;)
 
   As far as F.E.A.R goes, since it only allows up to a 1152 resolution in the settings, I can run it completely maxed out at an average frame rate of 74fps. That's very respectable for the self-proclaimed "system crusher". I really hope they release a new patch to upgrade the resolution settings up to 1680x1050 so I can enjoy my widescreen goodness like I do in HL2.
 
   So is SLI for you? That's the real question. I would have to say that for probably most of you the answer is NO.
 
   And even if money were no object, the fact of needing SLI is still in question for most. If you currently have a 6600GT or 6800GT, it may be a good choice to bump up that performance and try to save some cash without going to the new 7800 series. However look closely at the options as the 7800 series is the current benchmark and really a MUCH better card then the old 6000 series cards. It may be a better choice to drop that old card and move up the 7800GT like I did and really get a boost.
 
   Taking the SLI plunge for me has been a fairly painless situation, other than F.E.A.R busting my chops. And before you ask, of course I googled for a solution and just couldn't find a definitive solution. Since I've already beat the single player game in F.E.A.R, and don't have a ton of time to really get into the Multi-player right now, I'm just letting it sit until I find a solution. It'll come....it always does.
 
   One last mention I'd like to make: I also downloaded and played the Half life 2: Lost Coast level using the SLI configuration. Lost Coast is also a self proclaimed "System Crusher" with it's gigantic textures and HDR lighting, however I thought It performed extremely well on my system. I played it at an unforgiving 1680x1050 resolution also and have some resized screenshots to show you below.
 
   You'll notice the Frames per second at the moment of screen capture in bottom left hand corner in yellow.
 

HL2: Lost Coast

HL2: Lost Coast

HL2: Lost Coast

HL2: Lost Coast
 
 
    So again, is SLI for you? Well, if you absolutely have to have the best, then YES. It's not cheap, but nothing good ever is. It's certainly brought a new light to my gaming experience.
 
   My final remarks will be this: before you think about going SLI, you better have a good system to match it up with. Running Dual 7800GT's with a 1ghz cpu and 512mb of ram is a huge misdirection of funds. Take a look at my system specs and if you're running less CPU or RAM, you may want to consider upgrading something else with that extra video card money.
 
   I hope I shed some light on something for someone in this article. I'm having a great time with my SLI and I hope you do too!
 
   If you'd like to discuss SLI or anything else, you can do so in the new VH Forums!
 

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