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NVIDIA HB SLI Bridge: A Technical Review by Der8auer

Kaapstad said:
Which games have given 10% improvement @4K.

I may have some of them and could test later.
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The division for one. Pc world got a 25% boost on that. I also notice they got 15% on Rainbow 6 and this guy only got 7%.

Still, if for the odd game you can get 7 to 25% gain for a $40 item when people are spending £1200 on a pair of cards which is only giving them 23% gain over their old cards then you would be daft not to spend that $40.

Although I do admit nobody has shown any difference between the HB and the old LED one yet.

The pc world guy might have done something stupid with testing the division (cant think what) but if you get 25% more fps with the hb bridge in the game which is the most demanding of the current games, then I doubt that will end up being the only game affected.
 
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Greebo said:
Good review but ruined by not testing some of the games which have shown over a 10% gain at 4k.
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Feel free to send the games to me haha :D

I don't own more recent games actually.

edit: there is really no chance you can gain 25 % in FPS by adjusting the lenght of some traces by few mm. Honestly no way. If you get 25% difference, there is something wrong
 
der8auer said:
Feel free to send the games to me haha :D

I don't own more recent games actually.

edit: there is really no chance you can gain 25 % in FPS by adjusting the lenght of some traces by few mm. Honestly no way. If you get 25% difference, there is something wrong
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Which is why it looks odd in the pcworld review and I want to see somebody else get the same results.

Surely it's possible with 60% more bandwidth with the hb bridge? That with certain games it really does limit the sli scaling?

This is the review btw

http://www.pcworld.com/article/3087...ayoff-in-buying-nvidias-40-sli-hb-bridge.html

Another review here with lots more games. Some zero gain others like the division, fallout 4 and witcher 3 all gaining up to 30%

http://www.hardwareunboxed.com/nvidias-hb-sli-bridge-surprising-gains-gtx-1080-sli-testing-inside/

It seems the games that get massive gains are the ones with poor sli scaling with normal bridges. It would seem that the only reason sli scaling is so poor is the lack of bandwidth of the sli bridge and hence why you can get 30% gains

So probably worth the $40 for those games alone. No point spending 1200 or even worse two titans at 2200 and then restricting your framerates by 30% in some of the top games.

And I suspect they won't be the last games where you will see these kind of differences.
 
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der8auer said:
Feel free to send the games to me haha :D

I don't own more recent games actually.

edit: there is really no chance you can gain 25 % in FPS by adjusting the lenght of some traces by few mm. Honestly no way. If you get 25% difference, there is something wrong
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Love it. :D
 
These results are all well and good, but he's completely neglected frametimes. It would be nice to know how much of an impact this has on the SLI sync limit (visible through RTSS Overlay)

On my two OC'd 980Ti's, the sync limit would regularly hit 1, and with it came noticeable frametime variance.
 
frametime is vastly improved with the hb bridge, smooth as butter. Microstutter disappears.

I suspect even 980ti suffered due to lack of good bridges.
 
der8auer said:
edit: there is really no chance you can gain 25 % in FPS by adjusting the lenght of some traces by few mm. Honestly no way. If you get 25% difference, there is something wrong
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Depends how it actually works - which I don't know so might be completely irrelevant here - but with high frequency electronics a few mm can be enough to push you outside of your noise margin, etc. and reduce the effective speed.
 
Rroff said:
Depends how it actually works - which I don't know so might be completely irrelevant here - but with high frequency electronics a few mm can be enough to push you outside of your noise margin, etc. and reduce the effective speed.
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Surely its all to do with the max bandwidth? The hb cards offer 60% more bandwidth. That is making 30% difference in some games, namely any game previously which showed poor sli scaling of less than 50%

So should be pretty easy to spot the games where the HB bridge will make the biggest improvements.
 
I dunno enough about it - there may be some component (of the equation) there in which the performance of individual traces is of more impact than the total bandwidth by width of the link or something.
 
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RichardH754 said:
Can't really tell any difference with the Nvidia HB one that I use, to 2 normal floppy bridges!
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Only in games where sli normally scales poorly like the division or the witcher.

Most games are zero difference.

Plus you arent even running at 4k you numpty! :P
 
~20% boost in Firestrike Time Spy

~30% boost in The Division, ~30% boost in Witcher 3

Big boost in some other games too... but not everything, like that review suggests.

But the ones that's don't have much of a total FPS boost, get a very nice improvement in micro-stutter.
 
to confirm, these only work on the 1070/1080 and txp?

I am struggling to find the normal SLI bridges in 60mm, but found one of these and wanted to know.

Cheers
 
-Gamble- said:
to confirm, these only work on the 1070/1080 and txp?

I am struggling to find the normal SLI bridges in 60mm, but found one of these and wanted to know.

Cheers
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You can use these on other NVidia SLI setups but there is no extra benefit over the normal bridges.
 
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