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corsac
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- Jul 17, 2023
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Hi!
My name is corsac and I try to build a little render farm with 3080Ti's for 3D rendering on C4D + Octane but I have some troubles.
I suppose it's gonna be hard to solve this just with the basic infos I have but let's hope..
I decided to make a setup with 4x 3080Ti (Founder Edition) to make a little render farm using Cinema4D and Octane.
All GPUs are recognized by my motherboard, displayed in my devices manager / in GPU-Z and all updated drivers are installed. There is no SLI config.
Here is my specs :
- Motherboard : Gigabyte X299X AORUS MASTER (2 x PCI Express x16 slots, running at x16 and 2 x PCI Express x16 slots, running at x8)
- CPU : intel Core i9 10920X 3.50 Ghz
- GPUs : 4x 3080Ti FE
- RAM : 64Gb CORSAIR DDR4
- 1500W be quiet! Dark Power Pro 12 Modular 80+ Titan
- Windows 10 + Nvidia Drivers 536.40
Once I run the tests with OctaneBenchmarks (with RTX Enable), with all 4 GPUs activated I get a score of 1510.65.
4x 3080Ti is suppose to be a 2580 score if I look at the OctaneBench® 2020.1.5 Results. So it's almost half the score... A friend of mine with only one 4090 gets the same score as my four 3080Ti.
Based on that I tried several other tests by deactivating other GPUs one by one. I get :
- 3 GPUs activated (GPU 1, 2 and 3) : 769.89
- 2 GPUs activated (GPU 1 and 2) : 814.10
- 1 GPU activated (GPU 1 only) : 604.95
I precise that it is really when I have 3 or 2 or only 1 card activated! Not one at a time...
So that's where it gets weird: I get a better score when I only have 2 GPUs running rather than 3... And also almost get the same score when I only have one of them versus 3... So it feels like 1 (or multiple of these cards) was messing up something.
BUT I decided to try every card indivually and here is the score I get for each of them.
- GPU 1 : 604.95
- GPU 2 : 506.81
- GPU 3 : 544.79
- GPU 4 : 640.48
So the scores for each card are ok compared to single card results on the OctaneBench® 2020.1.5 Results (the average is 640 for the 3080Ti). Each card individual card seems to work okay...
Here are screenshots and CSV files of the tests.
The PCIE Slots on the motherboard are set at their respective max bandwith : PCIE x16 and PCIE x8. Here is how it look in the BIOS.
Don't know if that could be the issue.. The fact that not all PCIE are running at x16..?
If any of you have an idea of what is going on, it could be a huge help! Because I don't get why I have correct scores for single cards but nothing logic when running all of them.
Thanks a lot,
corsac
My name is corsac and I try to build a little render farm with 3080Ti's for 3D rendering on C4D + Octane but I have some troubles.
I suppose it's gonna be hard to solve this just with the basic infos I have but let's hope..
I decided to make a setup with 4x 3080Ti (Founder Edition) to make a little render farm using Cinema4D and Octane.
All GPUs are recognized by my motherboard, displayed in my devices manager / in GPU-Z and all updated drivers are installed. There is no SLI config.
Here is my specs :
- Motherboard : Gigabyte X299X AORUS MASTER (2 x PCI Express x16 slots, running at x16 and 2 x PCI Express x16 slots, running at x8)
- CPU : intel Core i9 10920X 3.50 Ghz
- GPUs : 4x 3080Ti FE
- RAM : 64Gb CORSAIR DDR4
- 1500W be quiet! Dark Power Pro 12 Modular 80+ Titan
- Windows 10 + Nvidia Drivers 536.40
Once I run the tests with OctaneBenchmarks (with RTX Enable), with all 4 GPUs activated I get a score of 1510.65.
4x 3080Ti is suppose to be a 2580 score if I look at the OctaneBench® 2020.1.5 Results. So it's almost half the score... A friend of mine with only one 4090 gets the same score as my four 3080Ti.
Based on that I tried several other tests by deactivating other GPUs one by one. I get :
- 3 GPUs activated (GPU 1, 2 and 3) : 769.89
- 2 GPUs activated (GPU 1 and 2) : 814.10
- 1 GPU activated (GPU 1 only) : 604.95
I precise that it is really when I have 3 or 2 or only 1 card activated! Not one at a time...
So that's where it gets weird: I get a better score when I only have 2 GPUs running rather than 3... And also almost get the same score when I only have one of them versus 3... So it feels like 1 (or multiple of these cards) was messing up something.
BUT I decided to try every card indivually and here is the score I get for each of them.
- GPU 1 : 604.95
- GPU 2 : 506.81
- GPU 3 : 544.79
- GPU 4 : 640.48
So the scores for each card are ok compared to single card results on the OctaneBench® 2020.1.5 Results (the average is 640 for the 3080Ti). Each card individual card seems to work okay...
Here are screenshots and CSV files of the tests.
The PCIE Slots on the motherboard are set at their respective max bandwith : PCIE x16 and PCIE x8. Here is how it look in the BIOS.
Don't know if that could be the issue.. The fact that not all PCIE are running at x16..?
If any of you have an idea of what is going on, it could be a huge help! Because I don't get why I have correct scores for single cards but nothing logic when running all of them.
Thanks a lot,
corsac