Official Statement from Otoy towards GTX 980/970

Sat Dec 06, 2014 12:52 pm

Do you have a power draw meter to confirm 980 draws 110W under load in Octane? 6ms/s is really great improvement and I would not expect further speedup for 900 series.

Sat Dec 06, 2014 1:14 pm

smicha wrote:Do you have a power draw meter to confirm 980 draws 110W under load in Octane? 6ms/s is really great improvement and I would not expect further speedup for 900 series.

Here you go

Really quick power draw comparison.

From what I gather under similar prices for my location 980 over 780 Ti offers:

75% Speed;
50% Power;
+1Gb memory bonus.

Sat Dec 06, 2014 1:20 pm

Thank you! What does (e.g. Afterburner) shows in term of power usage %? Could you also post core and memory clock readout while rendering?

Sat Dec 06, 2014 1:40 pm

smicha wrote:Thank you! What does (e.g. Afterburner) shows in term of power usage %? Could you also post core and memory clock readout while rendering?

Why of course!

Little color-coding to help orient oneself. To be extra clear-first gpu is 980, second and third are 780Ti's.
Same benchmark scene as above. Octane 2.14. First came 980 then 780. Have fun

Sat Dec 06, 2014 4:44 pm

that looks interesting =) finally all those usage numbers start making sense, but still..let's say:

4x 780Tis would draw ~1000W of power (& probably at least 1200W PSU is needed),
4x 980s would draw ~ 600W of power (probably 750-850W PSU would be good idea),
..but the second rig would need to run longer..

so to do the same work that first rig does in 1 Hour (& uses 1KW/h), second rig is going to take 1hour & 20minutes (& use not 0.6KW/h, but 0.8KW/h in total)

so yeah, if You take to compare 780Ti it might seem to have a lower value (but it has never been a king of value),
if You take 780 (6GB) to compare..it's a different story then, as
* 780 (6gb) will still going to be faster, even if would use bit more power,
* but again gives 2GB extra in comparison to 980..

personally I still don't see Maxwell being so tempting,
but after last update it start looking better =)

Thanks for all the information! It's insane amount of data that users of this forum generate!

Sat Dec 06, 2014 5:05 pm

...and looking at 64% power draw of gtx980 (compared to 90-95 by titan) something tells me that gk210 (i we see it soon) we'll be of much better value than gk204.

Sat Dec 06, 2014 5:43 pm

smicha wrote:...and looking at 64% power draw of gtx980 (compared to 90-95 by titan) something tells me that gk210 (i we see it soon) we'll be of much better value than gk204.

Could you explain it a bit more deeper?

TBH I want to sell my 780Ti watercooled because the Ichill model was never made for heavy RAM usage, hence Octane. And I can't get it not to crash Octane with Cuda Error 700, so my situation is kinda desperate. So my plan was to sell 780 and get stocked with 980 without changing 1kW PS. Now I'm seeing your crypric post and "Whaaa?" Is low power usage a good thing? What is the "gkXXX" index? Ultimately should I buy two more 980 or sick with crashing 780?

Help appreciated.

Sat Dec 06, 2014 8:23 pm

Thanks for sharing DayDreamer, that's useful info.

Seeker

Sat Dec 06, 2014 10:04 pm

Will there be improvement to 980? Prices for 970 and 980 are pretty much linked to count of CUDA cores. So I assume they are the defining part of Card's renderspeed. 970 has about 75% cored of 980. My idea was that octane's speed will behave exactly the same. 970 will be 75% of 980's speed. Somehow it's not really the case.

Sun Dec 07, 2014 3:48 pm

Little OhMyGod what is happening update.

Got a scene. Simple ball scene with animation. Pathtrace kernel
There are two lights, you can see 'em there, and a jpg-sphere-env, everything else is Glossy.

2x 780 Ti give me 10 M/s
add 980 to that and i have 19M/s (lowest 16 M/s on ocassion)

Jawdrop!

: Balls in Mirror

There might be some hidden potential after all...