First OCTANE BENCHMARKS on GTX 970/980!!!!!!!

[smicha]

I think you are right and I hope this is a driver only issue.

[smicha]

980 @ 1480/3954 - 4Ms/sec

[acc24ex]

- again, I am going to look if the prices of 590 gtx have dropped any - I am still able to pull of everything with 1.5 gb .. sadly the gpgpu community is not strong enough - actually it is - in the bitcoin mining market - maybe octane should enable computing on bitcoin type specific cards ..

[smicha]

Exactly! If brigade can make use of radeon cards, why octane cannot?

[glimpse]

nVidia wouldn't claim that it's the most advanced CUDA card =) if that wouldn't be based on concrete performance facts.
http://devblogs.nvidia.com/parallelfora ... ver-made/- let's wait for some updates from OTOY on the code of OctaneRender =)

[smicha]

Right. Patience is virtue... Can't wait to get my 3x old new 780 6gb and join them with my titan:)

[glimpse]

hehe these 6Gigs are lovely =) - that's the best of these "old" cards that for so short period offered insane value =)
While I was looking around the net for the new "old" 780's found a good deal for stye same price of used TitanBlack
(& I do prefere stock coolers as they take all the hot air out of the case =) these partner offers are just for looks..
as in cramped scenarios they get a bit too hot =) & these OCs on air is causing headache when stability starts to fall apart =)

[smicha]

Glimpse, you are right. Some time ago I bought for my brother 2x 780 windforce and they were very close each other. The temps were so high that we decided to connect them using raisers, but then instability issues occurred. So yes - it's much better to have reference air cooling and dissipate heat outside a case. But all of these problems are gone when you water cool'em (just what I did).

What I also noticed that when you have 4x cards (e.g. titans) on air, they are operating on the lowest core clock i.e. 837mhz (due to temps reaching 80C) and the last one (that is coldest) is 10C cooler.

So water cooling gives you not only low temps around 40C but also let titans go at boost clock 1006 mhz for all of them (+20% performance) and you can safely overclock them within locked voltage (1.2V) to 1200mhz, which gives you overall performance improvement 43%!. So 4x titans on water equals approx. 5.7 titans on air.

[gordonrobb]

I need to look into water cooling if that's the case.

[glimpse]

So water cooling gives you not only low temps around 40C but also let titans go at boost clock 1006 mhz for all of them (+20% performance) and you can safely overclock them within locked voltage (1.2V) to 1200mhz, which gives you overall performance improvement 43%!. So 4x titans on water equals approx. 5.7 titans on air.

water-cooling done right is a good thing =) but honestly I've never though You can get so much out of it - 5-10% on air, 10-15% on WC, but 40+ % is an insane deal - might well be worth to drop 1K for good loop if You have four cards - and get more boost than being extra card =)))

Does that reflect on samples? I mean with CPU OC I've noticed You start getting diminishing returns with crazy OCs..