Is SLI worth it?

Page 2 - Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech.

LTC8K6

Lifer
Mar 10, 2004
28,520
1,575
126
I have no problem with going SLI if you have the money and want the latest and the greatest right now. There is no question that you will have the fastest rig on the block.

I think it is a real risk to bet that you will be able to buy a second card 6 months or a year later and be up to speed with the latest. There is the possibility that you will just end up behind the curve again and have to buy 2 new cards or even a new mobo to keep up. 6 months will probably work out, but a year is getting questionable to me.

There is also the added complexity, heat, and power requirements that go along with running 2 high end video cards and a mobo that supports them.

Personally, I have the money and if SLI turns out to be reliable and stable after it has been available for long enough to make good judgements about it, I will not hesitate to get a board and 2 video cards.
 

SonicIce

Diamond Member
Apr 12, 2004
4,771
0
76
Sure, a single 6800 Ultra can do 1600x1200 4xAA/8xAF in FarCry at reasonable framerates. But did we all forget about HDR? You would need two 6800 Ultras to keep up when HDR is on. Who knows what other games in the future will utilize HDR...
 

HappyNic

Senior member
Oct 14, 2001
641
0
0
Originally posted by: Dolly
Can I ask something, does playing in 16x12 instead od 1024x768 or exen 12x10 with AA and AF make SUCH a big difference ??? WITH AA and AF enabled?

I mean is it so crap at 1024 that you need so spend atm 1000$ ( rougly of course ) to run the game at 16x12?

The next step to start buying 22"+ screend to up the resolution that a game can run :)

I thing its more future proof to get the sli tech now and the second card later rather than a need for todays game.

As I say unless 1024x768 with 4x8 looks crap to you peeps :)


it really depends on your display,, on a monitor of 17in the 1024x768 is good enough, and on a 19 mon the other 1152x864 is good enough. For CRT monitors all these resolutions will give you a pretty good and sharp display for gaming.
But if you have a LCD then you will need to use their native resolution to give you that sharp look. example: on my 20in Dell LCD DVI it's native resolution is 1600x1200, so if i play game at this resolution it'll give me the sharpest picture on this LCD. If I using a smaller resolution i'll get a not as sharp picture. I can fix that problem by using D-SUB (analog) input instead of DVI,, but then I will get black borders on all sides. The smaller the resolution the bigger the black border.

Lot of people have LCDs right now so the 1280x1024 is the more common rez for gamming now. It's not that 1024x768 is not good, it's just that if you have a LCD of 17in and above you'll want to use the higher resolution. :)






 

unipidity

Member
Mar 15, 2004
163
0
0
Id be worried about card compatibility. If Nvidia were to say that the 6600 series would be supported and available in retail for 2 years, then okay. However, I would be worried that by then I would not be able to find an indentical card... which is largely down to manufacturers.
 

Avalon

Diamond Member
Jul 16, 2001
7,571
178
106
I understand those who buy SLI for maximum performance (two 6800GTs or 6800Us), but I do not understand how going the SLI route is economical vs. buying a single high end card.

1) An SLI board will cost $50 more than a non-SLI board (take the Asus SLI expecting to be $180, while something like an MSI K8N Neo Platinum is only $130).

2) Let's assume you want to go dual 6600GT to be economical, and still have the power of a 6800GT when you finally get a 2nd card. You buy one today for $200. Your total is $250 at the moment.

3) A year later, you buy the same 6600GT for $150. Only thing is, the card may be a different revision and you are having compatibility issues trying to run in SLI. Or, the newest card has a different bios, so you'll have to flash your older card. But, you've solved that, and now you're up and running. Your total is $400.

4) A year after that, you decide you need more oomph. You buy the next gen card (7600GT) for $200. Your 6600GTs will either have to go into another rig, or you'll have to sell them. Neither can be used in your rig any longer. You sell them for $100 each. You've essentially gotten your new midrange 7600GT for free.

5) A year after that, you fire up SLI again and purchase another 7600GT for $150. Possible need to upgrade the old card's bios.

Repeat.

Or, you bought a 6800GT right off the bat for $375. You're getting better performance right now, and a year later when there is that 6600GT setup to compare to, if you're running with any AA/AF, you're still outperforming the SLI setup a bit. You didn't have to flash your older card to a newer bios to match the newer card, because you've only got one card. You've paid the same ammount, and have a capable motherboard (non SLI) that you like. You also enjoyed better performance for the first year. When you upgrade to a 7800GT for $375, you were able to sell your 6800GT for $200. If you follow the prices of either route, you've just gone through $550 after selling back your old cards.

It's not the miracle ecnonomic way to go about upgrading like some think.
 

JackBurton

Lifer
Jul 18, 2000
15,993
14
81
Originally posted by: SonicIce
Sure, a single 6800 Ultra can do 1600x1200 4xAA/8xAF in FarCry at reasonable framerates. But did we all forget about HDR? You would need two 6800 Ultras to keep up when HDR is on. Who knows what other games in the future will utilize HDR...
Even with 2 6800Ultras I'd think full out HDR would be pretty rough to pull off. :(

 

KAM04m

Junior Member
Nov 23, 2004
10
0
0
The ONLY benefit SLI has now is running 1600x1200 w/ full AA and AF! If you look at Anandtech's review closely you will see some games even LOST fps is SLI mode! WOW $1000+ setup and your losing FPS ...Sounds pretty crazy to me. I know people are going to say that was a lower resolutions. Oh so now we have to buy a better monitor that will support this high resolution? Buy a new mobo, new PSU, new Graphics cards, and monitor to get the full benefit of SLI. Am i the only one that thinks that is crazy? SLI is a great technology but the worst value technology ever! Again I mentioned this else where so I will say it here, some games have caps on them so HIGH FPS really don't care unless you benchmark.
 

Killrose

Diamond Member
Oct 26, 1999
6,230
8
81
With the kind of numbers I'm seeing with SLI, I think a single chip "next Generation" GPU will have the capability of surpassing 2 "current" GPU's in SLI performance wise. I'm not that impressed, SLI is not much faster in several apps which show the single 6800Ultra holding its own.

Definately not for me, but a must have for the power gammer hardcore types.
 

Avalon

Diamond Member
Jul 16, 2001
7,571
178
106
Originally posted by: Killrose
With the kind of numbers I'm seeing with SLI, I think a single chip "next Generation" GPU will have the capability of surpassing 2 "current" GPU's in SLI performance wise. I'm not that impressed, SLI is not much faster in several apps which show the single 6800Ultra holding its own.

Definately not for me, but a must have for the power gammer hardcore types.

I definitely agree that this should be for power gamers. Having two 6800U cards should be a gamer's wet dream, and is what I think SLI should be used for. I'm not so sure about next gen cards surpassing this gen's SLI, though. I remember seeing ATI's specs for their next gen, and I wasn't impressed. The upcoming launch of cards in the spring may just wind up being a refresh. We shall see.
 

HappyNic

Senior member
Oct 14, 2001
641
0
0
Originally posted by: Rollo

--First you would need to invest in a SLI mobo,
I buy a new motherboard every year anyway, Ive read these will cost $150 and up. (about $10-$20 more than I usually spend, so not a factor?)

Wow, you buy a new motherboard every year? good for you, but I'm sure most can't do the same. So you're just gonna upgrad the motherboard? What about the CPU and RAM?


--If you get 2 top end card now, it would be a overkill and you'll be spending too much $$$ for something that you will not use fully.
Why wouldn't you get to use it fully? When you're playing every game at 16X12 4X8X with no slowdowns, that isn't "using it"?

So your advise is to get 2 top end cards ($900) to get a couple of more frame rates on a game they can already play?


--If you get 1 top end card now, you'll be limited to getting the same card later if you plan to take advantge of the SLI Motherboard that you purchased before hand. By doing so you are limiting yourself on videocard options. Either you get the same card you got a year ago, or you get a new Graphic card. If you are getting a new Graphic card then you just wasted you money on the SLI mobo, so your only option that Justified you purchase of this SLI mobo is to get the same card you got a year ago.
Errr, this is sort of the point? That you can by another of the same card later when they're cheaper rather than selling your old card at a huge loss?

what I gave here is a example of your choices after you got a SLI mobo and 1 videocard and is thinking of getting the 2nd card to complete your SLI or a newer Videocard.



So instead of getting a SLI mobo and then a top end card, you could just get a top end card, and when the time comes to upgrade, you can get the new top end card and just resell your old one.
Of course, you'll have to live with much lower performance than the guys who bought SLI, and knowing that you're usually a guy who tries to have the best or close to it, but now you're just in the middle of the pack with average performance. Every benchmark you look at from now on will have your $400 - $500 card in the middle of the chart.

When the time comes to upgrade could be 1 year, 2 year or even 3. I didn't say WHEN that person is going to upgrade..,, you upgrade when you NEED to. I got my ATI 8500 ($200) when they released, can play all the game that I WANT to play, and just a week ago I upgraded to a ATI 9800 pro (Used $100) which can play all the games that's CURRENTLY OUT. I normally would not pay more that $300 for a videocard, most wouldn't too, why do you think they call $200 mark Main Stream. Oh my old 8500 can still play Half-Life2 very well.



You also have the options of moving to SLI mobo if it gained more support by this time, and you'll know exactly how 2 sli card will preform on the newer current games.
More support? Who cares? Motherboard makers are working feverishly to put out boards like this as we speak. We know how it works with FarCry, Doom3, and Half Life2, which are going to be the most heavily licensed engines in the next couple years?

more support is alway better, improvement on SLI hardware will happen. That will mean another new motherboard you'll have to get.,


A Good example is Direct X.
If you do SLI now you are limited to DX9 and i'm sure the new card will be going to DX10 or 11.
nVidia cards are DX9 SM3. The games that support this will start coming out over the next year. Even though DX9 has been out two years there are less than 10 games that really use it. Do you honestly think you can tell us, and not have us laugh really hard, that DX10 and 11 will be a factor in the next year and a half? How often do you think people with $600-$1000 to spend on video cards upgrade video cards? (hint: they are not keeping them 5 years)

I'm talking about what newer Directx would the new videocard support. If they can support higher would it not be better?


So this can really decrease your preformance, if the game you want to play is base on the new DX. Just check out how bad the FX5900 did on DX9 over DX8 on half-life 2.
LOL- this proves my point. HL2 came out a year and a half after the FX5900. I don't know about you, but if you honestly keep any computer hardware 2 years, you're using antiques.

, But most of the other videocard around the same price range as the FX5900 when it was released seems to do just fine with DX9 Even some lower cost one still do better. Example: If you were to get the FX5900 at the time and do SLI, you'll still be slower than a $200 card, 6600GT. How much does the fx5900 cost?


What i'm waiting for is a Videocard that's similar to a motherboard, so that we can just exchange the GPU and RAM. ;)
You'll wait a long time for that, do you think the only components on a video card that change are the core and RAM?!?!?
just like a motherboard their are other stuffs too, but the 2 main ones are CORE and RAM. Why is it not possible? Besides this is what I would like to see in the future, is it wrong to tell people this?



Nothing in your post makes any sense at all, you should really research this stuff better before giving advice on it.
What I gave are advices for the average joe. What you gave is no advice at all.
All you said was, you should get a SLI motherboard along with 2 top end card right now.. (~$1000) so you will be at the top of the list in benchmarks. Of course you'll need new CPUs and newer ram ( ~$500) too. You don't have to worry about support or compabilty of softwares/games that's 1 and a half years aways because you would of upgraded to all new videocard, motherboard, cpu and ram already..



It would work if everyone is as Rich as you, :)

 

nitromullet

Diamond Member
Jan 7, 2004
9,031
36
91
Originally posted by: SonicIce
Sure, a single 6800 Ultra can do 1600x1200 4xAA/8xAF in FarCry at reasonable framerates. But did we all forget about HDR? You would need two 6800 Ultras to keep up when HDR is on. Who knows what other games in the future will utilize HDR...

HDR mode in FarCry doesn't support AA.
 

nitromullet

Diamond Member
Jan 7, 2004
9,031
36
91
Oh my old 8500 can still play Half-Life2 very well.
Really? Got any benches? I did some benches with a GeForce2 MX 400 in Doom3 a while back:

High Quality 1280x1024 no AA/AF v-sync on, all options on:

2148 Frames Rendered in 1110.5 Seconds = 1.9 FPS

Low Quality 640x480 no AA/AF v-sync off, all options off

2148 Frames Rendered in 121.8 Seconds = 17.6 FPS

Curious to see what an old 8500 can do in HL2.
 

Acanthus

Lifer
Aug 28, 2001
19,915
2
76
ostif.org
So happynic youre trying to imply that we dont NEED sli to play the latest games?

Duh.

If you want the fastest you gotta shell out. You dont NEED an FX55 or PC4400 to play new games either.
 

HappyNic

Senior member
Oct 14, 2001
641
0
0
Originally posted by: Acanthus
So happynic youre trying to imply that we dont NEED sli to play the latest games?

Duh.

If you want the fastest you gotta shell out. You dont NEED an FX55 or PC4400 to play new games either.

Duh.
 

HappyNic

Senior member
Oct 14, 2001
641
0
0
Originally posted by: nitromullet
Oh my old 8500 can still play Half-Life2 very well.
Really? Got any benches? I did some benches with a GeForce2 MX 400 in Doom3 a while back:

High Quality 1280x1024 no AA/AF v-sync on, all options on:

2148 Frames Rendered in 1110.5 Seconds = 1.9 FPS

Low Quality 640x480 no AA/AF v-sync off, all options off

2148 Frames Rendered in 121.8 Seconds = 17.6 FPS

Curious to see what an old 8500 can do in HL2.

I will have to get back to you on that one, I didn't run any benches when I was playing it with the BBA 8500 retail but it was running at 1024x786, no AA/AF all the other stuff at high. The reflection was at reflect world. The frame rate should be over 30fps.... . I'll need to find time to reinstall the 8500 back in my system to benchmark it. Is there anyone out there that still has a 8500 running that can do that for me?

Oh my rig is a AMD xp 2400@3200+ with 1 gig of ram on a ABIt NF7-s mobo.

 

Viper96720

Diamond Member
Jul 15, 2002
4,390
0
0
They should try making dual gpu cards again nvidia or ati. I think it would be more likely for ATI to do. Since Nvidia would probably stick with SLI. I think it would be great if they got it working right. A dual X800 gpu video card.
 

dklingen

Member
Sep 24, 2004
127
0
0
Anyone planning on upgrading a GPU & CPU combination has to agree that it makes the most sense to go PCIe. That being the case it also makes the most sense to buy an SLI motherboard and at least have the "double GPU option".

I recently purchased an AGP 6800GT and ran it on my Athlon 2500XP. The performace gain was there (but marginal) and not worth the $372 I paid for the 6800GT. So, I had to consider replacing my cpu/mb to get the "real" performace gain. To me, it does not make sense (upgrade wise) to invest in a new agp setup. Ultimately, I returned the 6800GT and will buy a new cpu/sli-mb/6800GT in the future.

Does anyone actually believe the next generation of GPU's will exceed the 70% gain SLI shows now? I would be surprised.
 

KAM04m

Junior Member
Nov 23, 2004
10
0
0
Guys check this out!
The third paragraph is what I am talking about.

When buying an SLI system you should note that not all games work with this mode. Without the right SLI profile in the driver the game runs only on one card with SLI activated, and sometimes even more slowly than when SLI is deactivated. The game's age and level of 3D technology also play a large role.
-Tom's Hardware Guide

That seems like a huge blow towards SLI! If I spent just even $600 (the BARE minimum for SLI) on trying to increase performance, I would atleast want an increase in everything! I just think SLI is too expensive and still has a lot of flaws that need to be worked out. Plus todays processors aren't fast enough to handle the performance of SLI. Advice: Wait a year or more if wanting to get SLI. Of course if you are a hardcore gamer ...have at it! ;)
 

ronnn

Diamond Member
May 22, 2003
3,918
0
71
If you read anandtech, yes. If you read Tom's, no. Personally I would wait for others to take the plunge and work out driver problems. So an ultra now and maybe another later would not be a bad option. If it doesn't work out, you only lose on the price of the mother board.
 

sandorski

No Lifer
Oct 10, 1999
70,698
6,257
126
Originally posted by: KAM04m
Guys check this out!
The third paragraph is what I am talking about.

When buying an SLI system you should note that not all games work with this mode. Without the right SLI profile in the driver the game runs only on one card with SLI activated, and sometimes even more slowly than when SLI is deactivated. The game's age and level of 3D technology also play a large role.
-Tom's Hardware Guide

That seems like a huge blow towards SLI! If I spent just even $600 (the BARE minimum for SLI) on trying to increase performance, I would atleast want an increase in everything! I just think SLI is too expensive and still has a lot of flaws that need to be worked out. Plus todays processors aren't fast enough to handle the performance of SLI. Advice: Wait a year or more if wanting to get SLI. Of course if you are a hardcore gamer ...have at it! ;)

I came here after hearing about this. SLI only works for 50 games and requires a special profile made by NVidia for it to work. Even though NVidia will be creating new Profiles for various games, I think this limitation kind of takes some shine off of Nvidai's SLI implementation.
 

maevinj

Senior member
Nov 20, 2004
928
11
81
how many games do you actually play? all the games im playing right now were in the benchmark tests anandtech ran. just curious not trying to start anything

also for people saying this is only for rich people can afford an sli system . im planning on upgrading for under a 1000 dollars. im currently running xp2500+ @ 3000+ with a bfg 5700 ultra. im planning on just getting the nforce4 mobo 1 6800gt, cpu, and a new power supply. should be under 1000 bucks and just recycling my corsair xms memory and my sata hard drives and updating the rest later as needed.
maybe thats just me but i dont consider 1000 for a kick ass upgrade on computer for rich people
 

VisableAssassin

Senior member
Nov 12, 2001
767
0
0
To me since I can afford it its an attractive item...however its a toss up for me between a new vid setup or another AR-15...I think the card setup will lose :)
 

sandorski

No Lifer
Oct 10, 1999
70,698
6,257
126
Originally posted by: maevinj
how many games do you actually play? all the games im playing right now were in the benchmark tests anandtech ran. just curious not trying to start anything

also for people saying this is only for rich people can afford an sli system . im planning on upgrading for under a 1000 dollars. im currently running xp2500+ @ 3000+ with a bfg 5700 ultra. im planning on just getting the nforce4 mobo 1 6800gt, cpu, and a new power supply. should be under 1000 bucks and just recycling my corsair xms memory and my sata hard drives and updating the rest later as needed.
maybe thats just me but i dont consider 1000 for a kick ass upgrade on computer for rich people

That's a good point, but that's not entirely the issue. The problem is that you can't always be sure that the game you like or Play is going to work with SLI. Though the more popular games will have support, the need to have that support is kind of puzzling and quite unlike 3DFX's SLI which worked with any Glide game(also DirectX and OpenGL games). It also adds the element of whether Profiles would continue to be made if Nvidia abandons SLI in favour of Single Chip solutions in the future, thus leaving SLI owners without SLI capability for newer games.

 

maevinj

Senior member
Nov 20, 2004
928
11
81
Originally posted by: sandorski

That's a good point, but that's not entirely the issue. The problem is that you can't always be sure that the game you like or Play is going to work with SLI. Though the more popular games will have support, the need to have that support is kind of puzzling and quite unlike 3DFX's SLI which worked with any Glide game(also DirectX and OpenGL games). It also adds the element of whether Profiles would continue to be made if Nvidia abandons SLI in favour of Single Chip solutions in the future, thus leaving SLI owners without SLI capability for newer games.

oh i understand that completely. but look how long people have been playing the original HL and its mods. we know sli supports hl2 so i should be set till HL3 :)

and i was just saying for a 1000 bucks i figure sli should last @least a year or year and half and if not im only out 400 or so for the mobo and cpu. hopefully by the time they give up on sli, dual core procs will be out and i can upgrade to those. but your point is well taken