AtenRa
Lifer
- Feb 2, 2009
- 13,554
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Both VEGA 2 and RDNA 1 have
1. They use the HD Libraries
2. The design is giving priority to density vs higher clocks. But if you want higher density it is better to use the HD Libraries than using the HP Libraries. So we go to number 1 again.
So when we have two designs at 7nm HP process (VEGA 20 and NAVI 10) with density at 40Mt/mm2 that can reach 1800/1900MHz and then a chip (A100) with density of 65Mt/mm2 that only reach 1400MHz , we can understand there are fundamental differences either in the process or in the design. In this situation most of the data points to the process.
But even if it is the design of A100 that makes the density difference and not the Libraries, making it a low speed high density design, its is only logical that if they would port GA102 that can reach 1800-1900MHz, it would not have the same high density as A100 on the same process with the same Libraries but much lower and closer to VEGA 20 and NAVI 10 in order to keep the high speeds.
I dont have a direct article to link but there are two possibilities for the much higher A100 density over VEGA 20 and NAVI 10.I'm curious to read about that. Do you have a link to where A100 is said to use a high density library at TSMC?
1. They use the HD Libraries
2. The design is giving priority to density vs higher clocks. But if you want higher density it is better to use the HD Libraries than using the HP Libraries. So we go to number 1 again.
So when we have two designs at 7nm HP process (VEGA 20 and NAVI 10) with density at 40Mt/mm2 that can reach 1800/1900MHz and then a chip (A100) with density of 65Mt/mm2 that only reach 1400MHz , we can understand there are fundamental differences either in the process or in the design. In this situation most of the data points to the process.
But even if it is the design of A100 that makes the density difference and not the Libraries, making it a low speed high density design, its is only logical that if they would port GA102 that can reach 1800-1900MHz, it would not have the same high density as A100 on the same process with the same Libraries but much lower and closer to VEGA 20 and NAVI 10 in order to keep the high speeds.