SLI Performance

The final performance investigation of this review focuses exclusively on NVIDIA's nForce4 SLI Intel Edition. More specifically, it focuses on SLI performance.  The performance benefits of SLI apply just as much to Intel as they do to AMD, but to give you an idea of those performance benefits, we ran tests in Doom 3, Half Life 2 and Splinter Cell: Chaos Theory - three of the most demanding games out today. 


Doom 3 Performance

Doom 3 has always been a strong selling point for NVIDIA, and the performance impact of SLI here is extremely strong.  At 1600 x 1200, the 6800GT gains 34% from SLI, while the 6600GT gets a nice 56% increase in performance.  For Doom 3, a pair of 6600GTs are not only cheaper, but also 22% faster than a single ATI Radeon X850 XT Platinum Edition.

Doom 3 SLI Performance

Turning on 4X AA results in even larger performance gains, with the 6800GT getting anywhere from a 23% up to a 70% increase in performance.  The 6600GTs fall between 58% and 75%, all very impressive gains as you would expect from a doubling of the number of GPUs in the system.

Doom 3 SLI Performance

SATA Controller Performance Half Life 2 SLI Performance
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  • xsilver - Thursday, April 14, 2005 - link

    oh and before when you were arguing about heat --- if you didnt understand... let me translate the graph segagenesis provided
    amd 64 3500 at load = 114w
    intel 550, 3.4ghz /load = 207w

    that's close to DOUBLE power consumption with similar performance/price characteristics.
  • xsilver - Thursday, April 14, 2005 - link

    #54
    I remember reading amd's 3 year roadmap right here on AT.... maybe you missed it

    3 year roadmaps aren't very good anyways, they provide no real hard information.... what are you worried that amd isn't going to exist in 3 years???

    what AT people here are arguing is about performance... now you have jumped from heat output to spelling to performance and now to company profile... please be concise
  • Questar - Thursday, April 14, 2005 - link

    "The only defense I imagine he could possibly conjure up right now is currently in the market there is the "Nobody got fired for buying Intel" mentality where companies and such are wary of trying non-Intel products mainly because... Dell and other major manufacturers wont offer it in any quantity."

    Actually there are two reasons:

    1) Qualification costs. it can be easy to drop $150k to qualify a new platform.

    2) Product longevity. Change is very expensive to large corporations. Anything we make a commitment to buy must have a lifespan of at least 18 months from the date we qualify the product. We also must be comfortable with the companies 3 year product roadmap. So far there are no teir one vendors that have AMD product lines that meet these requirements.

  • Questar - Thursday, April 14, 2005 - link

    NVIDIA changed the spelling of their name from nVidia to NVIDIA a few years ago, have a look at NVIDIA's home page for confirmation - http://www.nvidia.com/page/companyinfo.html

    Questar: NVIDIA is the correct corporate capitalization of the company. I actually don't think I've ever seen it spelled "nVidia".

    I stand corrected. Thank you.
  • glennpratt - Thursday, April 14, 2005 - link

    I think you mean you disagree with his first statement, since his last statement was about DDR2. Personally, I assume reviews on this site are talking to me (PC enthusiast) and not businesses (except reviews which explicitly state otherwise which are few and far between here). In that context, Anand has a point.
  • KristopherKubicki - Thursday, April 14, 2005 - link

    Questar: NVIDIA is the correct corporate capitalization of the company. I actually don't think I've ever seen it spelled "nVidia".

    Kristopher
  • Motley - Thursday, April 14, 2005 - link

    Perhaps it should have been worded differently like... offered performance benefits that have only yet to be realized. But as worded, it is misleading and incorrect. Obviously, I read your site often, and I have come to expect technical correctness in what you write ;-)

    That said, I still would have to disagree with your last statement. Where companies purchase and keep PC's around for 3+ years (OMG, I wish we got rid of PC's in 3 years), the ability to purchase PCI-E when it came out knowing that we could upgrade them to iSCSI, etc in the future *IS* a very tangable benefit. At home, it's a different story, where my motherboard changes with every major change (or every other as money permits).
  • BaronVonAwesome - Thursday, April 14, 2005 - link

    You have to be leery of anyone who resorts to juvenile symantics in an argument. When Questar derided another person for using the word "worthless" to describe Intel, you had to ignore him. Obviously, "worthless" wasn't meant literally. That's one of the wonders of the English language, the way it evolves, with words taking on more subtle meanings through the gradual societal acceptance of colloquialisms and slang. Words like "worthless" also lose their qualitative and quantitative qualities through this evolution...depending on how the word is used of course. Generally, when people resort to literal symantics, they feel like they are losing the argument. Reminds me of when Bill Clinton questioned the definition of the word "is." Questar's back was against the wall, I guess.
  • glennpratt - Thursday, April 14, 2005 - link

    On another note will there be a non-SLI version of the nF4 Intel Ed.?
  • glennpratt - Thursday, April 14, 2005 - link

    Questar - This may have been said before, but I didn't read this whole thread.

    Reviews are generally filled with opinion, it's the nature of the beast. If you wanted an Intel white paper well this isn't the place for it. If you've taken a high school level english class then you should be quite capable of determining opinion from fact in common english.

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