Dell's Quad SLI: 2006's White Elephant?
January 7, 2006 11:45 AM
comment(s) - last by
Yesterday Dell announced its quad 7800GTX SLI motherboard, but is such a monstrosity something to really value, or is it the ultimate White Elephant?
When Michael Dell and Jen-Hsun Huang stood up in front of
and announced the Dell XPS 600 Renegade, a product manager for a major motherboard manufacturer began to laugh hysterically. Dual 7800GTX video cards are nothing new -- I was shown several prototypes back in October. Putting two of those cards in an SLI configuration is something that has been feasible for several months, but only on beta or severely hacked drivers. NVIDIA's partnership with Dell means they will now need to provide quad SLI support inside the core Detonator drivers, or release specific drivers for these systems. The first option leaves the possibility for some interesting driver hacks, the second option might not be practical depending on the actual volume of these systems.
But pragmatically looking at the performance of such a system, what can we really expect? Many modern games only receive a 40% performance boost by putting
7800GT cards into dual SLI mode
at modest resolutions, like 2048x1536. Dual 7800GTX cards receive only about a 33% performance boost in the same benchmarks, but out of the gate a single 7800GTX out performs two 7800GT cards in SLI.
Diminishing returns is already apparent with only two high performance 7800GTX cards, and there are similar results elsewhere for 7800GTX 512MB cards. Although there is no claim anywhere that this new XPS Renegade will be a mainstream system, hopefully we see more innovative and efficient (maybe even quiet) systems from the world's largest PC manufacturer, rather than another dirty hack to grab headlines... Fortunately Dell just released their 3007FPW to calm our tensions.
This article is over a month old, voting and posting comments is disabled
RE: Not quite "diminishing returns"...
1/8/2006 1:32:35 AM
Like I said, diminishing returns has nothing to do with cost. Diminishing returns, in itself, means that your benefit keeps lessening as you add additional units of input (in this case video cards) and at some point it will either reach 0 or you will have a disutility.
An example of this could be as follows:
You start with a single video card which gives you X performance. You add a second one and you get 1.8x performance. You add an extra pair (so you have 4) and you get 3x performance.
This implies that the marginal utility from adding the second card is .8x and the marginal utility for each of the third and fourth cards is .6x. From this you could deduct, with reasonable certainty, that the returns will continue to diminish until they reach zero and you start getting disutility as you add more and more cards. This is diminishing returns.
Regardless, system performance WILL experience diminishing returns because returns ALWAYS diminish in PCs because at the same time you are increasing the number of consumers (in this case video cards) you are splitting the rest of the resources between them. What I meant to point out is that the video subsystem is not at fault here for weak performance increase when going SLI with higher-end card, it's the CPU (and maybe memory subsystem) that will make performance drop. Some applications, in fact, will experience close to no performance diminishment.
RE: Not quite "diminishing returns"...
1/8/2006 7:09:23 AM
It depends on what you are considering for your "Units of input". You are looking at it as the number of video processors you are adding to the system, while I was looking at it as the amount of money I was tossing into it.
And I agree, the video subsystem is extremely powerful, and there probably is a very good use for it, but for 99% of the people out there, they won't be running that one application that scales that well over 4 video cores without being severely bottlenecked by the CPU, etc. Perhaps if it was in a Dual-processor system with 2 hyperthread enabled dual core P4's, and running some of the newer games that actually can use more than one core you'd see some difference. Maybe.
"Spreading the rumors, it's very easy because the people who write about Apple want that story, and you can claim its credible because you spoke to someone at Apple." -- Investment guru Jim Cramer
Michael Dell's CES Keynote
January 6, 2006, 5:19 PM
Rosewill Releases 3 New Powerline Networking Adapters
May 21, 2013, 4:29 PM
German Researchers Test 40 Gbps Wireless Broadband
May 21, 2013, 11:01 AM
Qualcomm, Samsung Push AMD to Fourth Place in Processor Market
May 21, 2013, 7:50 AM
Supermicro Looks to Shake Up Server Market
May 20, 2013, 9:00 PM
HiPerGator Supercomputer is Florida's Most Powerful Supercomputer
May 17, 2013, 7:08 AM
5/7/2013 Daily Hardware Reviews
May 7, 2013, 12:02 PM
Most Popular Articles
High School Student Creates Storage Device that Can Charge in 20 Seconds
May 20, 2013, 6:51 AM
Google Announces "Pure" Galaxy Nexus S4 for $649, Android Updates
May 15, 2013, 1:42 PM
Seawater Cooling Saves Data Center Big Bucks, Energy, Despite Jellyfish Issues
May 17, 2013, 3:23 PM
U.S. Federal Traffic Board Wants to Make Drunk Driving Threshold Far Harsher
May 15, 2013, 11:32 AM
Newegg Legal Chief: "We don't Feed the Trolls"; Defeats Bell Lab Shell Comp.
May 17, 2013, 10:11 AM
Latest Blog Posts
Quick Note: Sony "Teases" PS4 Ahead of Xbox Reveal in New Video
May 20, 2013, 12:33 PM
Nokia Introduces Instagram-Like App of Its Own to Help Lumia Sales
May 20, 2013, 7:10 AM
Parents of Pre-Teen Drivers Commonly Practice Distracted Driving Says Study
May 9, 2013, 7:16 AM
Apple's iOS 7 Running Into Internal Delays Due to Massive Overhaul
May 1, 2013, 4:26 PM
Elon Musk Willing to Spend More Money on Widening of 405 Freeway
Apr 26, 2013, 7:28 PM
More Blog Posts
Copyright 2013 DailyTech LLC. -
Terms, Conditions & Privacy Information