3 ms·
Two CPUs max out at 80 lanes iirc.
by deepnotderp 10y ago
Two CPUs max out at 80 lanes iirc.
- jacquesm 10y agoThat's correct, two Xeon 2600's do 40 lanes each and that's the maximum you can get right now. Which is why boards that are dual CPU usually require both CPUs to be installed to have all PCIe slots available because the PCIe interface is now embedded in the CPU rather than in the chipset.
- frozenport 10y agoYou can get 4 CPUs easy, and even 8 CPUs
- jacquesm 10y ago40 lanes / CPU is the maximum afaik.
- deepnotderp 10y agoYup, 2x40. It also depends on what you plan to do with the gpu. For example, models that do most of the work on the gpu and rarely ingest data from the host, such as large and slow models, will run just fine. On the other hand, attempting to parallelize training across GPUs and nodes is a chore...
- frozenport 10y agoYeah, but he was wrong on CPU counts
- lowglow 10y agoWhenever there is any AI/ML stuff on HN I immediately CTRL+F for your handle. Good reads + insights every time. Cheers.
- AlphaSite 10y agoAMDs. Apples should hit 128 lanes for a dual socket (as I understand it each socket has 128 lanes, but 64 are reserved for cross cpu traffic, leaving 128 for general usage).