gtx 780 sli?

[johnmhigh]

hi,

 

So i have a windforce gtx 780 OC 3GB and im looking to get another for SLI. ive never havd a dual card set up before and there is a few things im not sure about, i dont plan on it but if i get say a refrance 780 that has lower clock speeds will both cards run at the lower speeds? if i overclock them both does the overclock have to be the same on both cards?

 

Also as i understand it if i get another card i will still only have 3GB Vram is this right?

 

Lastly, how will two 780's handle 4K as ive seen alot of new system specs for games that recommend 4GB of Vram, so even if i have two will they struggle because of the lower memory?

 

my full PC specs are

 

I7 4790K non OC for now

8GB Corsair vengance 2133mhz

MSI gaming 5 MOBO

silverstone 1000W PSU

Coolermaster HAF 932 case

Windows 7 ultimate 64 bit

 

Thanks alot in advance guys.

 

 

[SeanBond]

It won't handle 4k well. Nothing is really suited for it right now unless you are getting 3 980's even 3 780's is meh because 4gb of vram is kinda what you need. Overclocks are luck of the draw but I suspect that you can safely have them set at 1150mhz. You should safely be able to play non demanding titles however. Talking like skyrim territory. And yes you will still have only 3gb of vram available. 

[Tost TheGrenade]

Rule if SLI. both must be same core (ex.gtx 780+gtx 780) both must have same amount of VRAM. (different memory speed is acceptable Both core is independent in clockspeed. yes 4K is better be running in 4GB because more pixel need to be rendered. but for now 3GB is ready for 4K but not for long.and yes u only get 3GB of GDDR5 even in two,three way SLI. because each core need their own Memory to work.

[Rorgash]

yea, clock is independant of each other actually, or so it seems looking at my monitoring of my 2 780´s in SLI

[johnmhigh]

ok thanks that helps alot, so if i get another windforce card thats not factory overclocked, i think its only like 50mhz off core and mem i should be fine. ive got a ok overclock on the card i have now, +120 on core and +850 on mem, even if i get a second card and it doest overclock well i shoud still keep the overclock on the first card?

 

thanks

[othertomperson]

Nothing is really suited for it right now

 

I really don't think this is true anymore. Two 970s together cost about what a 780 ti used to and handle 4K without AA beautifully, giving mostly 60fps but dropping down to about 45 fps only on occasion. If that's a problem to you, I'm sure dropping down from Ultra/Ultimate will give you a pretty solid 60 fps.

 

EDIT: Just to point out, I haven't gotten around to overclocking yet. Also driver version 344.16 doesn't seem to agree with Windows 7. A few people on Nvidia's forums have written similar stories to what I'm experiencing so. Yeah. Teething problems abound.

[SeanBond]

I really don't think this is true anymore. Two 970s together cost about what a 780 ti used to and handle 4K without AA beautifully, giving mostly 60fps but dropping down to about 45 fps only on occasion. If that's a problem to you, I'm sure dropping down from Ultra/Ultimate will give you a pretty solid 60 fps.

 

EDIT: Just to point out, I haven't gotten around to overclocking yet. Also driver version 344.16 doesn't seem to agree with Windows 7. A few people on Nvidia's forums have written similar stories to what I'm experiencing so. Yeah. Teething problems abound.

I take it back, if you have that new 4k gsync monitor than two 980s would actually be pretty good.

[othertomperson]

I take it back, if you have that new 4k gsync monitor than two 980s would actually be pretty good.

 

That would be fantastic. In Linus's video about 4K Gsync he said that 42 fps was actually enough for him to be fooled into thinking it was 60fps by its smoothness.

 

I wonder if anyone else who has used GSync agrees with this because I saw The Hobbit at 48fps and was distracted at times by strobing that wasn't completely eliminated. Still, not requiring 60fps constantly to appear smooth would drastically reduce the graphics horsepower required.

[SeanBond]

That would be fantastic. In Linus's video about 4K Gsync he said that 42 fps was actually enough for him to be fooled into thinking it was 60fps by its smoothness.

 

I wonder if anyone else who has used GSync agrees with this because I saw The Hobbit at 48fps and was distracted at times by strobing that wasn't completely eliminated. Still, not requiring 60fps constantly to appear smooth would drastically reduce the graphics horsepower required.

Exactly, I can't play video games and call it a good experience when the frame rate keeps dipping, I either A. Don't use vsync at all and get awful tearing. B. Use in game vsync and get awful stutter when it dips below 60 or C Use lovely old adaptive vsync and not get nearly as much stutter during dips and when it comes back up past 60fps it take 2 or 3 seconds for adaptive vsync to kick back on at which point I am getting bad tearing because that usually means its just above 60fps. There worst place for tearing. C is definitely the lesser of evils but as soon as I can get my hands on a gsync ultrawide monitor than does not have a 200 dollar premium and closer to what linus said,$50 I will definitely buy into it in a heartbeat. 

[othertomperson]

Exactly, I can't play video games and call it a good experience when the frame rate keeps dipping, I either A. Don't use vsync at all and get awful tearing. B. Use in game vsync and get awful stutter when it dips below 60 or C Use lovely old adaptive vsync and not get nearly as much stutter during dips and when it comes back up past 60fps it take 2 or 3 seconds for adaptive vsync to kick back on at which point I am getting bad tearing because that usually means its just above 60fps. There worst place for tearing. C is definitely the lesser of evils but as soon as I can get my hands on a gsync ultrawide monitor than does not have a 200 dollar premium and closer to what linus said,$50 I will definitely buy into it in a heartbeat. 

 

I personally find tearing a lot more distracting than temporary framerate dips, so I tend to just go for v-sync, but that's totally just me. I was interested in the 21:9 monitors until I noticed I could have gotten two 4K monitors for the price of the *non-curved* one.

[SeanBond]

I personally find tearing a lot more distracting than temporary framerate dips, so I tend to just go for v-sync, but that's totally just me. I was interested in the 21:9 monitors until I noticed I could have gotten two 4K monitors for the price of the *non-curved* one.

You know there is actually a few monitors to choose from now right? I got mine for lg for 300. lol. 

[othertomperson]

You know there is actually a few monitors to choose from now right? I got mine for lg for 300. lol. 

 

I should clarify, I didn't want another 1080p monitor. I was after 3440x1440 and I couldn't find one that was anywhere near the value of a 4K.

[SeanBond]

I personally find tearing a lot more distracting than temporary framerate dips, so I tend to just go for v-sync, but that's totally just me. I was interested in the 21:9 monitors until I noticed I could have gotten two 4K monitors for the price of the *non-curved* one.

The cheap ones are 2560x1080p,

http://www.bestbuy.com/site/aoc-29-ips-led-hd-219-ultrawide-monitor-black/8822139.p;jsessionid=19B8750670F9CCD53C403822A7DDA1F2.bbolsp-app02-112?id=1218906369172&skuId=8822139&st=aoc%20ultrawide&cp=1&lp=1

 

http://www.bestbuy.com/site/lg-25-ips-led-hd-219-ultrawide-monitor/4120013.p?id=1219096319838&skuId=4120013&st=lg%20ultrawide&cp=1&lp=2

[SeanBond]

I should clarify, I didn't want another 1080p monitor. I was after 3440x1440 and I couldn't find one that was anywhere near the value of a 4K.

yeah, that one dropped to 800 which is actually what I would have gotten over 4k any day. But I don't have the graphics power to drive it and I didn't think it would be worth it to drop 1300 between another card and that monitor

[techenthused73]

I am also thinking about 780 sli as I currently have one 780.  Current prices for used 780 are just under 300 at Ebay and I expect even lower in a month.

 

My wonder is how long 3 GB of Vram will be sufficient. (I realize this question starts flame wars). Reason being that going sli would keep me from having to upgrade sooner (waiting 3 years to upgrade).  I have 1.6 years of use on my current 780.

 

Of course going to 780 sli I'd be looking at a 2560x1440p at 144 hz probably with G-sync.

[Tost TheGrenade]

I dunno man , but NVIDIA has a report that a normal life span for a Graphic Card would be 3 years , i think your GTX 780 could go more 2 years . If you are playing in 2K , i would say 3GB of VRAM is definitely enough for another like 2 years or so , 3 GB is overkill for 2K

[johnmhigh]

I didn't even know u could buy just 2k screens! atm I have a 24" benq 1080, if I got a 2k screen would I notice the diffrance a lot or just a bit? And could I run it on a single 780 or would that be asking too much of the card?

[Tost TheGrenade]

780 should handle latest title at 2K with no problem , but juz for 2 year , cuz the game's graphic is getting higher and higher  and yes you can buy 2K monitor ,