I have a Tyan S8030 board, which has pcie4, however I have no pcie4 devices, yet. Eventually I’ll be getting a nice graphics card to put in it, but beyond that there’s not really anything out there yet that gives extra performance over pcie4 when considering the extra cost in such devices. For nvme, I’d rather have the cheaper devices so I can get more in order to mirror them.
Sure, pcie4 nvme drives are technically faster in benchmarks, but you’d never actually feel a difference in normal use over pcie3. Intel has new pcie4 optane announced where pcie4 would make a difference if you need that special type of workload.
Make double sure it actually supports your chip though, there’s generally NO backwards or forwards compatibility with epyc generations.
1st and 2nd generation EPYC processors require separate BIOS images to be created and maintained. If two BIOS images were developed they could technically fit within a larger BIOS chip with some sort of switch logic to detect which branch to load during POST. However, given that the s8030 was just recently launched and the 1stgeneration AMD EPYC processors are quite old now and no longer the focus of most customers, we decided to not develop a BIOS branch capable of running the 1stgeneration EPYC 7001 parts.
Tyan Product Planning and Marketing
One note, I believe on epyc processors there’s something special/funky that goes on when you bump from 2933mhz to 3200mhz, which could potentially impact performance in a negative way. I’ll see If I can dig up the sheet I found but haven’t had the time to understand yet.
You’re not missing out. I don’t know @Log situation before his purchase (and looking over the manual of the 8030 is impressive). Going from a E5- v3 to an Epic seems massive.
Sapphire Rapids is being sampled today… gets released 2022
Better Power Consumption
Expandible and Plenty of Bandwidth!
Plopping down $8000 (4 units) in 1U is a no brainer when an upgrade to Zen 4 or 5 based system later or Intel based further down with minimal effort is not a deal breaker. If the units are meant as a stop gap with significant and measurable increases in your workflow it’s a small price to pay until true NEX GEN arrives and plot your course thereafter. Manufacturers and design team are not prioritizing PCIe 4 anyway and actively working on PCIe5 and its stability and rollout.
For throughput sensitive applications, to obtain higher IO throughput, Maximum Memory Bus Frequency can be set to the maximum allowed (3200 MT/s) provided your Memory DIMM hardware supports it. In this case, the Infinity Fabric Clock on these platforms will not be optimally synchronized with a Memory Bus Frequency of 3200 MT/s. This can a slight increase in memory access latency.
For latency sensitive applications, memory access latency can be reduced by setting the Maximum Memory Bus Frequency to 2933 MT/s or 2667 MT/s, in order to synchronize with the Infinity Fabric Clock. The appropriate Memory Bus Frequency for synchronized mode will depend on the AMD EPYC 7002 product family.
Basically because the Infinity fabric clock can only go so high, the memory speed has to be desynced from it at higher speeds, somewhat increasing latency if that matters for things you’ll notice latency issues with.