The new 7nm epyc would offer up to 162 pcie 4.0 lines
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Although AMD has been somewhat silent about its upcoming Zen 2-based 'Rome' EPYC server processors, that hasn't stopped speculation about its capabilities. For example, while AMD has said that a single EPYC Rome processor could deliver up to 128 PCIe lines, the company has not indicated how many lines two processors could deliver on a dual-socket server.
7nm AMD EPYC would offer up to 162 PCIe 4.0 lines
According to ServeTheHome.com , there is a clear possibility that EPYC can offer up to 162 PCIe 4.0 lines in a dual socket configuration, which is 66 lanes more than Intel's dual socket Cascade Lake Xeon servers. This outperforms even Intel's latest 56-core 112-series Platinum 9200 processors, which feature 80 PCIe lanes per dual-socket server.
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ServeTheHome made a post focusing on high-performance computing, and @RetiredEngineer on Twitter have concluded that two 7nm EPYC CPUs could support 160 PCIe 4.0 lines. Kennedy even expects there to be an additional PCIe line per CPU (meaning 129 lines on a single socket), bringing the total number of lines on a dual-socket server to 162.
Big problems for Intel
If the calculations and theories are correct, then Intel has even more serious competition than AMD has shown. Intel's latest Cascade Lake architecture, despite having up to 56 cores, will face significant challenges against 'Rome'. The new Rome processors have eight more cores, a new 7nm TSMC node, probably a lower price tag and power consumption, and perhaps significantly more PCIe lanes.
Although AMD faces an uphill battle for the server market, the advantages of EPYC 7nm hardware versus Xeon are sure to appeal to many server and data center companies.
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