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| Thunderbolt 4 http://lifein19x19.com/viewtopic.php?f=18&t=18481 |
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| Author: | RobertJasiek [ Mon Nov 22, 2021 1:35 am ] |
| Post subject: | Thunderbolt 4 |
The speed of Thunderbolt 4 is up to 40 Gb/s = 5 GB/s. Thunderbolt 4 via PCIe is up to 32 Gb/s = 4 GB/s. (b = bit, B = Byte) I wonder whether it is fast enough for eGPUs and AI programs, such as KataGo. For comparison, Code: PCIe 3.0 8x = 7,9 GB/s
PCIe 3.0 16x = PCIe 4.0 8x = 15,8 GB/s PCIe 4.0 16x = PCIe 5.0 8x = 31,5 GB/s PCIe 5.0 16x = 63,0 GB/s |
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| Author: | Ruarl [ Fri Dec 03, 2021 7:43 am ] |
| Post subject: | Re: Thunderbolt 4 |
Is the bus bandwidth a limiting factor for Go engines? You can certainly get eGPUs on Thunderbolt 3 which are capable of moving 25fps ish 4k ish video over the bus. If you had a GPU-only implementation of a Go engine it would only need to be receive the board state, and then later return the co-ordinates of its move, which is far less data. Since you're asking, I guess there's lots of CPU <-> GPU communication as the AI decides its move? How do they work? |
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