Video Cards - Someone clear this up?

My confusion lies in the two ports on a video card, dual heads, and adding a second card non SLI.

So for having two monitors displaying games (windowed game on each screen) can someone explain what the differences in performance will be with the two options?

Would a second non SLI PCI-E card added to a system give it 2x the graphics processing power assuming it wasnt limited by ram/cpu speed?

I remember reading here about the different modes that you can setup the dual monitors within windows, perhaps thats where I'm confused.

one card:
- good performance on main monitor; if another wow on 2nd then crappy on both

two cards:
- same as above; you can connect 4 monitors and have a wow client on each but performance is bad (not playable)

SLI:
- both cards drive 1 display only; wow does not use SLI and the actual pefromance will probably go down (that's what happend in my case)

but what about 2 cards, one monitor on each. decent performance on both?

I can't testify to dual cards, however I can attest that the previous poster is making broad and over generalized statements.

System:
Athlon X2 6000 (Dual core 3000mhz processor)
2GB ram
Nvidia 7900gt
Single installation of WOW

Under Windows XP I only had an X2 4400 processor, but the rest of the hardware spec's matched. I could run 3 copies of wow seemlessly without any performance issues. I would set 2 of them to minimal settings and the main would be maxed. The second monitor does give lower performance and if you use windowed mode for the main copy of wow it will experience framerate drops if you cross the screen border onto the 2nd monitor.

This is a limitation in DirectX and the Video Driver as you will see...

Later, I enabled horizontal span, which tells your nVidia card to treat both monitors as a single wide aspect monitor - 2560x1024. This allowed me to play all three copies without a performance hit on the 2nd monitor, the problem was maximized now doesn't work because it drags it to the full 2560x1024 window and thats a pain in the ass.
http://www.botbh.com/modules/copperm...l_3boxing2.jpg

So, I used wowmaximizer:
http://www.botbh.com/modules/copperm...al_3boxmax.jpg

This gave me the performance I wanted, with the seamless interface I needed for it to work.

Another example:


http://www.botbh.com/modules/copperm...ormal_6box.jpg

This wasn't overly playable... but it was good enough to throw WSG matches during a holiday weekend, I figured out that losing fast was much more honor efficient than winning slowly... I could move individuals and interact with the world, if I knew now about Keyclone it would have been exponentially easier.

Now the interesting thing is that with dual monitors in Windows XP you lose performance on the 2nd monitor, however with the single span mode you do not. Obviously an issue with DirectX.

This was corrected in Windows Vista. I currently threebox on the system spec'd above and have perfectly smooth gameplay with max settings. I have engaged in very limited PVP since I'm on a O.o server. But I regularly run instances and AE grind in the world.

I am actually getting my 2nd video card back from an RMA next week, if no one else can answer the question before then I'll throw it in my main machine and see how it performs under Vista.

perfect, exactly what I was wondering.

let me know how the 2nd card makes things go

Quote:

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Originally Posted by Bena

one card:
- good performance on main monitor; if another wow on 2nd then crappy on both

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no chance to start WoW twice on one PC with two TFTs so I can see both toons?

damn..

*throws away his hardware-setup-plans*

ok... looks like I need 5 PCs instead of 3 :(

@zanthor
do you changed something in the maximizer .ini ?
I also use horizontal span and want to play both wow clients maximized.

Quote:

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Originally Posted by beyond-tec

Quote:

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Originally Posted by Bena

one card:
- good performance on main monitor; if another wow on 2nd then crappy on both

---

no chance to start WoW twice on one PC with two TFTs so I can see both toons?

damn..

*throws away his hardware-setup-plans*

ok... looks like I need 5 PCs instead of 3 :(

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You CAN run multiple wow instances on one pc without any problems.
I'm running 5 (1 maxmized on my main lcd and 4minimzed). The slowdowns occur when you have 1 window on main lcd and other windows on 2nd lcd. Though like the other poster said if you're running both lcds at same res and are in span mode not dual-view then the speed hit won't be so bad.

I test run 4 windows on my main 30" (1 minimized) and they were going around 20fps. Running all 5 is too much for my system (dual core fx60). Each instance windowed takes about 15-25% cpu usage; around 5% when minimized. So to run all 5 comfortable you probaly need a quad core. And as others have said running all the windows visible will impact fps as well.

Quote:

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Originally Posted by Kriwi

@zanthor
do you changed something in the maximizer .ini ?
I also use horizontal span and want to play both wow clients maximized.

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Nope, command line options :).

"F:\Program Files\WoWFrame\Maximizer.exe" -D 2 -R 1280x1024 --margin 0,512,0,640
"F:\Program Files\WoWFrame\Maximizer.exe" -D 2 -R 1280x1024 --margin 512,0,0,640

Thats my TopLeft and BottomLeft .25 scale screens for the right hand monitor on my system. I am in Vista so horizontal span is not necessary, so you would want to adjust and you wouldn't need the -D 2 commands. For the resolution use the full resolution of your horizontal span and then adjust margins appropriately.

So something like:
"F:\Program Files\WoWFrame\Maximizer.exe" -R 2560x1024 --margin 0,512,1280,640
"F:\Program Files\WoWFrame\Maximizer.exe" -R 2560x1024 --margin 512,0,1280,640

That should place two 4:3 windows on the right monitor.

One catch, there is some form of relation to the available video modes of the video card and what wow will start in... Under Vista I haven't been able to make 1280x1024 show up as an option in horizontal span... of course with no performance benefit it's not necessary.

Quote:

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Originally Posted by beyond-tec

Quote:

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Originally Posted by Bena

one card:
- good performance on main monitor; if another wow on 2nd then crappy on both

---

no chance to start WoW twice on one PC with two TFTs so I can see both toons?

damn..

*throws away his hardware-setup-plans*

ok... looks like I need 5 PCs instead of 3 :(

---

Am I even posting here? Did you completely write off what I posted?

I currently run three on one box, two lcd's off a single dual head video card under vista and all three stay above 30FPS in the world.

If you want to build 3 PC's to 5 box on I'm assuming you want 2 on each PC and the main box dedicated for better performance there... that would be easily achievable with reasonably cheap hardware.

I was threeboxing yesterday on my spare video card (as I mentioned, the 7900gt is in for repairs at MSI). Running an X2 6000 with a 7600 GS I was still getting over 25fps in town and well over 30fps in the world/instances.

Keep in mind that the 7000 series cards are a generation behind, outside the mainboard/cpu my systems aren't bleeding edge, everythings been around and affordable for some time now.

Just some of my personal experience for extra input.

I currently run 1 full screen WoW on my laptop, Alienware m9700. I actually got two running yesterday but I tend to get an error when I try to run 2. Yesterday somehow the 2nd one ran but when I tried a third I got the error. Anyway, none of that matters, that's just why I only run one instance on this machine.

On a second machine I run 4 instances of WoW windowed and quartered on a single LCD. I haven't tried a 2nd monitor for that PC yet, and probably won't, those toons are relatively easy to control so all I need is a small open window to manually control them if the main dies or I lose one of them or something.

Performance on each window is really surprising. They are each getting 50 fps.

That machine has a dual core AMD at 2.6 GHz, 2GB of ram, and an 8800 gts.

Quote:

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Originally Posted by zanthor

Am I even posting here? Did you completely write off what I posted?

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sry mate, I'm only understanding 1/3 of what is written here because my english ain't that good :(

Quote:

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Originally Posted by beyond-tec

Quote:

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Originally Posted by zanthor

Am I even posting here? Did you completely write off what I posted?

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sry mate, I'm only understanding 1/3 of what is written here because my english ain't that good :(

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No problem, my German's not worth a damn!

Ich lasse z.Z. drei auf einem Kasten, zwei lcd's weg von einer einzelnen Doppelhauptvideokarte unter Vista und allem Aufenthalt drei über 30FPS in der Welt laufen.

Wenn Sie 3 PC zu Kasten 5 errichten möchten, an, das ich annehme, daß Sie 2 auf jedem PC und dem Hauptkasten, der dort für bessere Leistung... eingeweiht wird wünschen, die leicht mit recht preiswerten Kleinteilen erreichbar sein würde.

Ich threeboxing gestern auf meiner Ersatzvideokarte (wie ich erwähnte, ist das 7900gt innen für Reparaturen an MSI). Ein X2 6000 mit einem 7600 GS laufen lassend, erhielt ich noch Über25fps in der Stadt und gut im Überschuß 30fps in der Welt und in den Fällen.

Halten Sie im Verstand, daß die 7000 Reihe Karten ein Erzeugung nach sind, außerhalb des mainboard/cpu, das meine Systeme nicht Rand bluten, die everythings, die herum jetzt gewesen werden und während einiger Zeit erschwinglich.

I hope that helps, it's a combination of babelfish and what I remember from 2 years of heavy drinking in Manheim over 15 years ago ;).

@zanthor:

Thanks for translating into german.

Kriwi already explained to me what you've tried to say in your post.
Now I finally understand what you've meant.

Thanks to zanthor and Kriwi ;) because my fuse can't handle 5 PCs so I have to setup a multiboxing system on 3 PCs :)

As soon as I got the hardware I'll try that "horizontal span" thing.

is there an option for a vertical span? Because the TFTs will be
fixed on the wall in two vertical lines and the main TFT in the middle.
(I can't look by myself because I don't have the graphic card yet)

Yes, Nvidia can do horizontal and Vertical span.