Nvidia SLI HB Bridge Doubles GTX 1080 Transfer Rate For Better SLI Scaling Performance

Written by Jon Sutton on Wed, May 11, 2016 4:30 PM

It was easily overlooked in the glitz and glamour of brand new graphics cards being revealed, but Nvidia has also taken the time to detail its other latest technology - the GeForce GTX SLI HB Bridge. In a nutshell it’s a new connector for pairing up multiple graphics cards in a SLI configuration, the difference being its HB (high bandwidth) denomination.

Nvidia reckons the SLI HB bridge doubles the maximum theoretical transfer bandwidth in comparison to current generation Maxwell architecture when in SLI. This obviously helps in the speed at which the two graphics cards can communicate and share data with one another, in theory leading to smoother frame times and better SLI scaling.

The downside is that this particular Nvidia branded bridge is only going to be available for its GeForce GTX 1080 graphics cards at the moment. No dice on the 1070s at the moment, but a standard SLI bridge will still suffice. I’d guess from Nvidia’s viewpoint they’re thinking if you want more power than a 1070 then you’re probably going to opt for a GTX 1080 anyway.

From the looks of things Nvidia is only going to support dual-card solutions for the time being, although between now and the GTX 1080's launch on May 27th there's every chance we could see more. 

Any GD'ers tempted to opt for a SLI set-up this time around with Pascal? 

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12:40 May-12-2016

It's called: creating a need.

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10:55 May-12-2016

I guess size does matter after all

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11:27 May-12-2016
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05:37 May-12-2016

I have major doubts for this. SLI bridge currently does 1GB/s so an "HB" would be 2GB/s? Anyone hoping this will be a huge breakthrough in SLI better not hold their breath. If transfer rates were the problem then nvidia should have been usi

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02:42 May-12-2016

I wonder if the lower bandwidth of the standard SLI bridge was the reason why we still haven't seen Split Screen Render SLI being used in new game releases yet? Perhaps this new HB SLI Bridge (or NV-Link 0.5) is what they have been waiting for.

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22:40 May-11-2016

This info was in my inbox the same evening the GTX 1080 got revealed. Wasn't overlooked :)

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02:50 May-12-2016

Yeah I caught that info the first day as well. It almost sounds like it is about half the bandwidth of their NV-Link connection that is supposed to be used on their flagship professional card. To me it sounds like the consumer cards probably won't need as much bandwidth so they will get a cut down version of NV-Link as a SLI bridge.

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22:02 May-12-2016

Which confirms my speculations from way back that consumer cards will still rock PCIe :)

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22:06 May-12-2016

Yeah, I`ve been saying that all the time as well.


NV-link would be a bad idea. Everyone would need a new mobo (which would only support NV-link cards, so you`re locked up with AMD i guess?).

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20:27 May-11-2016

Its funny I never really thought of the SLI bridge being a bottleneck in some places until they announced this!

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20:02 May-11-2016

That is until AMD releases something that improves 3xgpu crossfire that blows this away, then I promise Nvidia will create something for 2-3 gpu sli.

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22:15 May-11-2016

AMD is already on another level xD. the 290(X) and 390(X) and the fury cards crossfire without a bridge, straight through the motherboard :D

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06:58 May-12-2016

It is like buying a flip phone when everyone is using a holo lens xD... It is cool... But it is stupid

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10:33 May-12-2016

See, we're there already:)

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20:21 May-12-2016

So. You take away bandwidth from PCI to use for crossfire. K. I dont mind having that extra bandwidth by using the SLI card

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23:36 May-12-2016

I wont pretend I know how that specific technology works but I am pretty sure they have implemented it in a way that doesnt impair performance... AMD cards used to have crossfire bridges. They wouldnt change that if it was for the worse.

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06:07 May-13-2016

Lucas is right, AMD stated when the bridgeless CF was released with the r9 200 gpus is that after a lot of tests, there is NO difference between Crossfire bridges and Crossfire through the motherboard in terms of bandwidth.

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19:50 May-11-2016

2Fancy4Me


haha , really nice looking sli, and... correct me if I am wrong, you can't use normal SLI bridge you need to buy special bridge with gtx1080?


Money grab or just new technology, or maybe both?

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18:51 May-11-2016

That's some sexy looking bridge

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18:17 May-11-2016

Maybe getting a second 1080 later, but 1 at release.

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18:18 May-11-2016

Yeah I'm thinking the same :)

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17:08 May-11-2016

its about time sli got better

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17:02 May-11-2016

its possible to get a SLI HB for me any time ?

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17:06 May-11-2016

Unless you have a 1080 at this point it's useless.

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17:08 May-11-2016

ohh i see.it is on Nvidia plan to get this and for gtx 9xx series ?

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17:07 May-11-2016

nah I dont think so. I am guessing the GPU has to be manufactured specifically for that bridge in order to work.

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16:54 May-11-2016

Right now it really does seem that Nvidia are trying hard to be the Jeremy Clarkson of the computing world; POWER!!!

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17:04 May-11-2016

They are trying to be AMD, basically.

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18:19 May-11-2016

How?

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19:47 May-11-2016

And amd is trying to be nvidia, what a strange times.

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21:56 May-11-2016

well AMD has always had more raw power than Nvidia, more flops(floating point calculations per second) and more bandwidth and just in general more raw power than Nvidia and AMD has Crossfire through the motherboard, while Nvidia still uses bridges, so Nvidia is boosting the SLI performance with stronger bridges.

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06:54 May-12-2016

That's not entirely correct, nVidia always tend to have higher memory speed, more Render output units and much higher cache. AMD might have more memory, higher bandwidth and bus, but that does not equal to more raw power alone. Besides both AMD and nVidia are designet completely differently so you can't just compare some of the aspects and conclude that AND has more raw power.

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