from Hacker News

The Changing Relationship Between Memory, I/O, and Network Bandwidth

by sorenbs on 8/25/23, 8:56 PM with 14 comments

• by gautamcgoel on 8/26/23, 5:17 AM

  This is interesting, but I think there are a lot of caveats. 800G Ethernet NICs are very expensive, and PCI 5.0 SSDs are much more pricey than PCI 4.0 SSDs. Also they used DDR5 4800 in their comparison instead of DDR5 6400. All of this is just to say than on a "typical" server/workstation, the relative speeds of Ethernet, RAM, and dusk might look very different than what the authors suggest.

• by vlovich123 on 8/26/23, 4:54 PM

  I was running memtest recently on my brand new 13900 with DDR5-6000 and the stock performance is 20 GB/s. Overclocking from motherboard stock setting of 4ghz to 6ghz still only meets me 25 GB/s.

  Is it the 38 GB/s for DDR5-4800 in the article hypothetical, my motherboard / CPU is a bottleneck somehow, or that memtest86 bundled with my motherboard isn’t capable of calculating bandwidth correctly for my system?