AMD Rome Second Generation EPYC Review: 2x 64-core Benchmarked
by Johan De Gelas on August 7, 2019 7:00 PM ESTPCIe 4.0
As the first commerical x86 server CPU supporting PCIe 4.0, the I/O capabilities of second generation EPYC servers are top of the class. One PCIe 4.0 x16 offers up to 32 GB/s in both direction, so each socket offers up to 256 GB/s in both directions, for a full 128 PCIe 4.0 lanes per CPU.
Each CPU has 8 x16 PCIe 4.0 links available which can be split up among up to 8 devices per PCIe root, as shown above. There is also full PCIe peer-to-peer support both within a single socket and across sockets.
With the previous generation, in order to enable a dual socket configuration, 64 PCIe lanes from each CPU were used to link them together. For EPYC, AMD still allows for 64 PCIe lanes to be used, but these are PCIe 4.0 lanes now. There is also another feature that AMD has here - socket-to-socket IF link bandwidth management - which allows OEM partners to design dual-socket systems with less socket-to-socket bandwidth and more PCIe lanes if needed.
We also learned that there are in fact 129 PCIe 4.0 lanes on each CPU. On each CPU there is one extra PCIe lane for the BMC (the chip that controls the server). Considering we are living in the age of AI acceleration, the EPYC 7002 servers will be great as hosts for quite a few GPUs or TPUs. Density has never looked so fun.
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steepedrostee - Thursday, August 8, 2019 - link
if i had to guess who is more full of crapola, i would think youSmell This - Thursday, August 8, 2019 - link
Pooper Lake?
Cascade is obviously, The Mistake By The Lake
Chipzillah will certainly strike back but it reminds me of the old 'virgin' joke. "My first wife was an OB/GYN, and all she wanted to do was look at it. My second wife was a psychiatrist, and all she wanted to do was talk about it, and ...
My third wife was an Intel Fan Girl, and all she could say was, "Wait until next year!"
HA!
RSAUser - Thursday, August 8, 2019 - link
Do we finally have a contender to run Crysis on max?Tunnah - Thursday, August 8, 2019 - link
I'd normally just ignore this but this really needs proofreading, There's multiple mistakes on every page, becomes a bit difficult to follow.cerealspiller - Thursday, August 8, 2019 - link
Well, 50% of the sentences in your post have a grammatical error, so I will just try to ignore it.GreenReaper - Friday, August 9, 2019 - link
He's a reader, not a writer. ;-)Oliseo - Thursday, August 8, 2019 - link
Pot. Meet Kettle.steepedrostee - Thursday, August 8, 2019 - link
wow amd !umano - Thursday, August 8, 2019 - link
Intel people will welcome "Rome" like gladiators "Ave, Caesar, morituri te salutant"I am really happy for Amd and I really hope their sells will be a lot more than they could ever dream.
Because they become more than competitive with the most rightful strategy, just deliver an awesome product. The fact they think that they will just double their shares shows how sick the market(s) are. The epyc is faster, greener and way way cheaper.
29a - Thursday, August 8, 2019 - link
"AMD does not blow fuses on cheaper SKUs to create artificial 'value' for buying more expensive SKUs"I like this guy, more reviews from him. He's not afraid to bite the hand that feeds him.