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dual graphics cards and filter drivers

Forum Graphic & Displays : Graphics Cards - dual graphics cards and filter drivers

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i'm researching how to make two graphics cards work in parallel (without worrying about recombining the signal coming out of each card for right now). i'm working with windows 2000 pro, and you prolly need to know a bit about device driver development to make sense of the next paragraph.

i intend to grab all I/O control requests for display devices with a lower-level class filter driver, so before the function driver can grab it, i would be able to dole out the requests, one way or another, between the available display devices. this way i won't have to worry about mutual exclusion, sharing memory or it being illegal to reverse engineer proprietary graphics card drivers ^.^

before i sink a few sleepless nights into this project, does anyone have any useful comments on my probably futile idea?


<P ID="edit"><FONT SIZE=-1><EM>Edited by CokeRat on 11/27/04 10:52 PM.</EM></FONT></P>

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before i sink a few sleepless nights into this project, does anyone have any useful comments on my probably futile idea?



<A HREF="http://www.nvidia.com/page/sli.html" target="_new">Nvidia SLI</A>

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Reply to Ned_Flanders

of course SLI. but what consumer wouldn't want to find a cheaper way?

Reply to CokeRat

<A HREF="http://www.nvidia.com/page/sli.html" target="_new">Nvidia SLI</A>

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Reply to Ned_Flanders

A cheaper way to do what? You're not gonna do better than what nV did, period! If you want the performance offered by SLi systems, the cheapest way (by FAR) is through SLi! No matter what, you're gonna have to buy a board that supports 2 cards and the two cards. Drivers are free last I checked and you aren't gonna get the performance of two 6800Ultras with 2 6600GTs no matter what you do (other than knock resolution down to, say, 48x36).

What exactly are you trying to do that nVidia hasn't spent three years of time and money doing?

Maxtor disgraces the six letters that make Matrox.

Reply to Vapor

Its basically like this coke.

Your Benjamin Franklin, catching electricity with a kite, you want to power my house with your electricity with a kite and a key.

The United States Power Authority is offering to hook up power lines and supply me via a power plant which is safe efficent and clean.

Do I want to tie a rope to my house and have lightining strike it and risk destroying everything??? Just because a rope and a key are pretty cheap.

Or do I want the sure fire way ???




Asus p4c800 Deluxe,1 Gig Mushkin PC3200 Dual Channel Level II V2,Pentium 4 3.0 512k 800fsb HT, Thermaltake Xaser III, Thermaltake Spark 7+, Sound Blaster Audigy2 ZS Platinum Pro, eVGA GeForce 6800 GT

Reply to rx7000

Electric power is far far from clean. In fact it is one of the main reasons why tons of sulfur dioxide, nitrogen oxides, carbon dioxides and tons of very fine dust and volatile organic compounds are released daily from coal burning power plants.


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Reply to RichPLS

Hey [-peep-] its a analogy calm down. Nuclear power is very compared to coal anyway. And what about hydroelectric power it dosnt get much cleaner than that. But no your going to try to totally twist this issue and make it a environment thing.

The point of the analogy was, which I guessed you missed cause your to busy hugging the trees is that why would you wanna use some experimental application out of some guys basement when you can used a tried and true developed method that works. Espically when everything is centered around the most expensive componet in your computer (Usually, before Rich jumps all over this one cause he has nothing to do I should point out that certain processors or huge drive arrays can cost alot more than your videocard).


Im not for shooting down your ideas and I salute your dedication and vision coke, but your in a tough boat considering nvidia, and alienware both have had these technologys in the works and both have solutions, you have your work cut out for you.

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Reply to rx7000

I still don't get it...how is he trying to do something cheaper than what's available? He still has to buy the board and the two cards! It's not like there is a subscription fee or a fee on drivers.

The way I see it, either the power company gives you as much power as you want through a line they installed for $100 or you can install a line yourself (they pay for the cabling, though) to them for the same $100. But with their line, it's guaranteed to get better and better as time goes on, with your line, you're SOL until you put another new one in.

^^^^that scenario is an AT BEST scenario, too. That supposes that he'll MATCH the work of nV, so chances are (going back to the analogy), he'll only be able to power his blender for 12 minutes a week with his line.

Maxtor disgraces the six letters that make Matrox.

Reply to Vapor

i'm not looking to beat what nVidia has done; obviously, since they've done it the best so far. it's just like Vapor says - you still have to get the cards and a board, but the only option right now is the pricey top of the line models.

it's only intended to be cheaper because you won't have to drop $$ on only the most expensive cards, and you should be able to retain almost all of your current hardware. a board with an external AGP slot is $100 nowadays; you could get two Radeon 9600s at $100 a piece; running in parallel, performance almost doubles. although it will still pale in comparison to dual GeForce 6-series, it'd ideally be better than most stand-alone cards as well.

but that's not even important - this is just r&d, not marketing. thanks for the opinions.

ciao.

Reply to CokeRat

How do you plan on having two AGP cards in the first place?

Maxtor disgraces the six letters that make Matrox.

Reply to Vapor

In my experience, CokeRat, this forum isn't visited by many people who are interested in cool research projects (hence your negative response so far). If I understand right, you're wanting to manufacture your own AGP graphics card that essentially contains two AGP cards within it, and does SLI with them on the same card, thus needing only one AGP port? It sounds like a cool thing to work on if you just want a project, but what you need is a community of electrical engineers to talk to, and at least a bachelor's in EE yourself. (though most of my college classmates didn't pick up class material well enough to do that kind of thing without a Master's degree.) If you don't have a degree or equivalent study in electrical engineering, I can guarantee you don't have enough background to do it.

The only advice I can give you is unless you're planning some sort of "AGP hub" that plugs into AGP and then lets two cards plug into it, is you might run out of board space pretty fast. Graphics cards are already big, and you'll need slightly less than double the components to put two cards in one. You will run into problems with the lengths of the signal paths and maintaining signal integrity. To accomplish the project you'll need CAD software that can simulate electromagnetics in circuits, a machine capable of soldering those tiny surface-mount components in place, and something or someone capable of manufacturing the multi-layer PCB you'll need to attach components to.

Reply to grafixmonkey
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