Hi all,
Since 2.26 reduced the PMC performance on pre-Pascal GPUs and PMC didn't run on Pascal GPUs at all, we had to switch back to CUDA 6.5 for pre-Pascal GPUs and enable PMC for Pascal GPUs.
Unfortunately using CUDA 6.5 + 8.0 for Pascal GPUs, crashes the PMC kernel, forcing us to use CUDA 7.5 + 8.0 for Pascal GPUs, which means that PMC runs a little bit slower on Pascal GPUs than on the corresponding Maxwell GPU. Since we don't have the resources to investigate this problem further, there isn't much we can do here about it.
There are no other changes compared to version 2.26.
Downloads:
Windows
- 64-bit commercial version (installer)
- 64-bit commercial version (ZIP archive)
Mac OS X
- 64-bit commercial version (DMG image)
Linux
- 64-bit commercial version (ZIP archive)
Happy rendering,
Your OTOY NZ Team
OctaneRender™ Standalone 2.26.1 [current 2.xx]
- blackshore
- Posts: 117
- Joined: Wed Jul 31, 2013 6:22 pm
Alright. So I can use both 780 and 1070 in the same machine but the 1070 will be a bit slower on PMC but pathtracing is unaffected?
I can back to normal performance! Thank you! 

NOTE: I'm sorry for bad english due to mute 
i7-12700KF
2x16GB RAM@DDR4-3600
MSI PRO Z690-A DDR4
Zotac GF RTX 4090 <3
SSDs OCZ RD400 0.5TB and Crucial 2TB SATA3
HDD 1TB SATA2
LG BD-RE BH16NS40
PSU 1kW
CRT 19" Samtron 19"

i7-12700KF
2x16GB RAM@DDR4-3600
MSI PRO Z690-A DDR4
Zotac GF RTX 4090 <3

SSDs OCZ RD400 0.5TB and Crucial 2TB SATA3
HDD 1TB SATA2
LG BD-RE BH16NS40
PSU 1kW
CRT 19" Samtron 19"

- p3taoctane
- Posts: 1418
- Joined: Mon Jan 25, 2010 12:53 am
Thanks for this build
Much appreciated
Much appreciated
Windows 7 Pro_SP 1_64 bit_48 GB Ram_Intel Xeon X5660 2.80 GHZ x2_6 580GTX_1 Quadra 4800
- itsallgoode9
- Posts: 894
- Joined: Thu Apr 03, 2014 9:04 am
- Location: New York City
- Contact:
so should pathtracing be slower as well? here are my results on a scene in standalone:
standalone, 2.26.1:
1080 gpu: pathtrace @ 4.71-ish Ms/sec
780 gpu: pathtrace @ 5.56-ish (periodic bouncing up to 6.0+) Ms/sec
standalone, 2.26.0:
1080 gpu: pathtrace @ 4.71-ish Ms/sec
780 gpu: pathtrace @ 5.56-ish (periodic bouncing up to 6.0+) Ms/sec
standalone, 2.26.1:
1080 gpu: pathtrace @ 4.71-ish Ms/sec
780 gpu: pathtrace @ 5.56-ish (periodic bouncing up to 6.0+) Ms/sec
standalone, 2.26.0:
1080 gpu: pathtrace @ 4.71-ish Ms/sec
780 gpu: pathtrace @ 5.56-ish (periodic bouncing up to 6.0+) Ms/sec
Same speeds only between versions!?itsallgoode9 wrote:so should pathtracing be slower as well? here are my results on a scene in standalone:
standalone, 2.26.1:
1080 gpu: pathtrace @ 4.71-ish Ms/sec
780 gpu: pathtrace @ 5.56-ish (periodic bouncing up to 6.0+) Ms/sec
standalone, 2.26.0:
1080 gpu: pathtrace @ 4.71-ish Ms/sec
780 gpu: pathtrace @ 5.56-ish (periodic bouncing up to 6.0+) Ms/sec
NOTE: I'm sorry for bad english due to mute 
i7-12700KF
2x16GB RAM@DDR4-3600
MSI PRO Z690-A DDR4
Zotac GF RTX 4090 <3
SSDs OCZ RD400 0.5TB and Crucial 2TB SATA3
HDD 1TB SATA2
LG BD-RE BH16NS40
PSU 1kW
CRT 19" Samtron 19"

i7-12700KF
2x16GB RAM@DDR4-3600
MSI PRO Z690-A DDR4
Zotac GF RTX 4090 <3

SSDs OCZ RD400 0.5TB and Crucial 2TB SATA3
HDD 1TB SATA2
LG BD-RE BH16NS40
PSU 1kW
CRT 19" Samtron 19"

- itsallgoode9
- Posts: 894
- Joined: Thu Apr 03, 2014 9:04 am
- Location: New York City
- Contact:
nuno1980 wrote:Same speeds only between versions!?itsallgoode9 wrote:so should pathtracing be slower as well? here are my results on a scene in standalone:
standalone, 2.26.1:
1080 gpu: pathtrace @ 4.71-ish Ms/sec
780 gpu: pathtrace @ 5.56-ish (periodic bouncing up to 6.0+) Ms/sec
standalone, 2.26.0:
1080 gpu: pathtrace @ 4.71-ish Ms/sec
780 gpu: pathtrace @ 5.56-ish (periodic bouncing up to 6.0+) Ms/sec
yeah, for me, i'm only seeing 15-20% increase in speed between a non Ti 780 and a 1080 FTW. I tested the two different versions to make sure it's not a version issue. Also, I checked the time to reach a set shading level and it too is only 15-20% difference.
Figured I'd go Old School here with V2...
Could you add Adaptive Sampling to the V2 for Mega Speed, that would be cool.
Regards,
Notiusweb
Could you add Adaptive Sampling to the V2 for Mega Speed, that would be cool.
Regards,
Notiusweb
Win 10 Pro 64, Xeon E5-2687W v2 (8x 3.40GHz), G.Skill 64 GB DDR3-2400, ASRock X79 Extreme 11
Mobo: 1 Titan RTX, 1 Titan Xp
External: 6 Titan X Pascal, 2 GTX Titan X
Plugs: Enterprise
Mobo: 1 Titan RTX, 1 Titan Xp
External: 6 Titan X Pascal, 2 GTX Titan X
Plugs: Enterprise
No, there won't be any further development on v2.Notiusweb wrote:Figured I'd go Old School here with V2...
Could you add Adaptive Sampling to the V2 for Mega Speed, that would be cool.
Regards,
Notiusweb
In theory there is no difference between theory and practice. In practice there is. - Yogi Berra
Then, Brigade it is!abstrax wrote:No, there won't be any further development on v2.Notiusweb wrote:Figured I'd go Old School here with V2...
Could you add Adaptive Sampling to the V2 for Mega Speed, that would be cool.
Regards,
Notiusweb
Does a Summer 2017 release date work, thanks!

Thanks always,
Notiusweb
Win 10 Pro 64, Xeon E5-2687W v2 (8x 3.40GHz), G.Skill 64 GB DDR3-2400, ASRock X79 Extreme 11
Mobo: 1 Titan RTX, 1 Titan Xp
External: 6 Titan X Pascal, 2 GTX Titan X
Plugs: Enterprise
Mobo: 1 Titan RTX, 1 Titan Xp
External: 6 Titan X Pascal, 2 GTX Titan X
Plugs: Enterprise