Would two GTX 1080 G1 Gaming GPUs be safe to SLI?

[chaosrelay]

Would two GTX 1080 G1 Gaming GPUs be safe to SLI?

I just recently bought a GTX 1080 and I was wondering if I'll be able to SLI it any time soon, but I was quite worried, since the card usually runs at 65-70 degrees celsius/centigrade while gaming. Can someone tell me if it's safe? Any kind of help will be appreciated.

 

[greens]

I mean, safe? Yeah its safe...

as long as you're below 90c you're fine.

Whats the rest of your rig like? Might not be able to push two 1080s.

 

[chaosrelay]

I mean, safe? Yeah its safe...

as long as you're below 90c you're fine.

Whats the rest of your rig like? Might not be able to push two 1080s.

But doesn't SLI usually result in both of the cards being hotter than usual?

Also, the rest of my rig is:
Intel i7-6700k
16 GB RAM
850W PSU
Not enough TB of space
Also the case is an NZXT Phantom 530.

 

[ikaz]

The normally a case of air flow through your system so they probably run a little (or alot) hotter depending on where the hot is routed too.

 

[chaosrelay]

The normally a case of air flow through your system so they probably run a little (or alot) hotter depending on where the hot is routed too.

So pretty much, if I space out my 1080s (IF it's possible, I don't really know, the SLI bridges seem a bit too short for that) and remove a drive cage that's blocking the front radiator, I'll be fine?

 

[greens]

You can only push two GTX 1080s if you don't use any other PCIe based devices, which you're not. So you're good there. the 6700k only has 16 workable PCIe lanes, and 8x is as low as you can go for a 1080, so two will work fine in your system.

Temperature won't really increase all that much. Cramped airflow could cause some rise in overall temperature, but really think about it, the TDP of the card cooler is the same, and as long as you are evacuating air from your case, there is no reason to believe that the temperatures would increase much at all. Certainly not by any amount to be concerned about.

 

[BadBoyGreek]

If you want to SLI two 1080's, you need Nvidia's new SLI HB bridge to get the maximum performance from them. The new bridges come in 3 different lengths from Nvidia and one of them will most definitely fit your spacing needs.

 

[n0ns3ns3]

Doing SLI of 1080 is safe but pointless and stupidly wasteful in 99.9%

 

[nebun]

I mean, safe? Yeah its safe...

as long as you're below 90c you're fine.

Whats the rest of your rig like? Might not be able to push two 1080s.

But doesn't SLI usually result in both of the cards being hotter than usual?

Also, the rest of my rig is:
Intel i7-6700k
16 GB RAM
850W PSU
Not enough TB of space
Also the case is an NZXT Phantom 530.

nope it does not, actually one card will be a little cooler because it will only run at half speed, especially if you don't have two x16 speed PCIE slots available....does your motherboard suppoert x16 on at least two PCIE slots?

 

[chaosrelay]

I mean, safe? Yeah its safe...

as long as you're below 90c you're fine.

Whats the rest of your rig like? Might not be able to push two 1080s.

But doesn't SLI usually result in both of the cards being hotter than usual?

Also, the rest of my rig is:
Intel i7-6700k
16 GB RAM
850W PSU
Not enough TB of space
Also the case is an NZXT Phantom 530.

nope it does not, actually one card will be a little cooler because it will only run at half speed, especially if you don't have two x16 speed PCIE slots available....does your motherboard suppoert x16 on at least two PCIE slots?

I'm honestly not certain how to check, so I'll just tell you what it is.
It's an Asus Z170-A.

 

[nebun]

I mean, safe? Yeah its safe...

as long as you're below 90c you're fine.

Whats the rest of your rig like? Might not be able to push two 1080s.

But doesn't SLI usually result in both of the cards being hotter than usual?

Also, the rest of my rig is:
Intel i7-6700k
16 GB RAM
850W PSU
Not enough TB of space
Also the case is an NZXT Phantom 530.

nope it does not, actually one card will be a little cooler because it will only run at half speed, especially if you don't have two x16 speed PCIE slots available....does your motherboard suppoert x16 on at least two PCIE slots?

I'm honestly not certain how to check, so I'll just tell you what it is.
It's an Asus Z170-A.

ok if you SLI two cards both will run at half speed, they will both run at 8x not 16x

 

[chaosrelay]

I mean, safe? Yeah its safe...

as long as you're below 90c you're fine.

Whats the rest of your rig like? Might not be able to push two 1080s.

But doesn't SLI usually result in both of the cards being hotter than usual?

Also, the rest of my rig is:
Intel i7-6700k
16 GB RAM
850W PSU
Not enough TB of space
Also the case is an NZXT Phantom 530.

nope it does not, actually one card will be a little cooler because it will only run at half speed, especially if you don't have two x16 speed PCIE slots available....does your motherboard suppoert x16 on at least two PCIE slots?

I'm honestly not certain how to check, so I'll just tell you what it is.
It's an Asus Z170-A.

ok if you SLI two cards both will run at half speed, they will both run at 8x not 16x

So, there isn't much of a point in doing it..?

 

[ikaz]

I have yet to see any test that show 1080 using more than the X8 lanes so you are with with SLI even at X8 PCI that being said probably most games would be able to take much advantage of 1080 SLI unless your running a 4k monitor and or maybe VR not sure how good SLI drivers are with VR right now.

 

[nebun]

I have yet to see any test that show 1080 using more than the X8 lanes so you are with with SLI even at X8 PCI that being said probably most games would be able to take much advantage of 1080 SLI unless your running a 4k monitor and or maybe VR not sure how good SLI drivers are with VR right now.

why would you even want to cripple the card...it was designed to run at x16 and see most befits from it....8x is like having a sports car but can't really drive it past 45mph

 

[ikaz]

Oh do you have some links that show X8 PCI lane slowing down the performance of GTX 1080 ? I looked and couldn't find any not saying your wrong just again please show me some proof.I looked at other forums with screen shot of personal test (yeah I know not the best method) but I couldn't find one single person saying that using 1080 or 1070 in X8 instead of x16 caused any performance issue. The only test I could find was below:

http://www.gamersnexus.net/guides/2488-pci-e-3-x8-vs-x16-performance-impact-on-gpus

I did find older test of GTX 980ti and there were no difference even running them in Tri and Quad SLI as long as the slot was at least x8.

It no way is it like driving/limiting a sports car to 45mph.

 

[Supernova1138]

I have yet to see any test that show 1080 using more than the X8 lanes so you are with with SLI even at X8 PCI that being said probably most games would be able to take much advantage of 1080 SLI unless your running a 4k monitor and or maybe VR not sure how good SLI drivers are with VR right now.

why would you even want to cripple the card...it was designed to run at x16 and see most befits from it....8x is like having a sports car but can't really drive it past 45mph

x8 x8 operation for SLI has been commonplace on Intel platforms for years, the only way to get a full 16 lanes for each card would be to go AMD and hit a CPU bottleneck since they don't have an up to date CPU or PCI-E 3.0 support for that matter, or buy an enthusiast chip like the i7 5930k that has 40 PCI-E lanes. So far there hasn't been any major performance loss running cards in x8 x8 mode, maybe a 2-3% difference at most in every test I've seen regarding PCI-E bandwidth. I don't know, maybe two of the new Titan X Pascals in SLI would push the limits of an x8 x8 configuration I don't think anyone's really tried that yet. Honestly though, if you can afford to drop $2400 on GPUs for the two Titan Xes, you can probably afford dropping $800 on an enthusiast i7 with 40 PCI-E lanes and an X99 motherboard.

 

[Alexoferith]

Would two GTX 1080 G1 Gaming GPUs be safe to SLI?

I just recently bought a GTX 1080 and I was wondering if I'll be able to SLI it any time soon, but I was quite worried, since the card usually runs at 65-70 degrees celsius/centigrade while gaming. Can someone tell me if it's safe? Any kind of help will be appreciated.

Hi, I don't have a GTX 1080 but I have two GTX 980 in SLi. It sounds like that you are the same level of IT sense as I have. Unless you are playing in the highest resolution using ultimate setting, with multiple displays, you don't really need two GTX 1080 in SLi. Unless you are the same as me, got more money than sense (but I did save two years for it).

One thing about the temperature. I have noticed that with mine two cards, they are EVGA and EVGA's default profile for the fan speed was set to a speed so that the card will appear to be silent while playing game. It does increase the fan speed but at about 60 degree. I don't know which manufacturer are your card, try changing the default fan speed. I increased mine by 25% and now the temperature of the two cards average 50 degree while playing Technomancers. Only started to get a bit noisy during big fight, lots of enemies.