Originally posted by M@GOid
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AMD EPYC 7003 "Milan" Linux Benchmarks - Superb Performance
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Originally posted by torsionbar28 View PostSGI dumped MIPS for it.
Originally posted by torsionbar28 View PostSun ported Solaris to Itanium, but it took them so long, by the time it was ready, the writing was on the wall and they wisely never released it.
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Originally posted by torsionbar28 View PostHonestly I'm more looking forward to what the storage technology will be for PCIe5 boards, at least on the client side. The M.2 connector does not carry enough electrical power to meet the PCIe5 spec...
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Originally posted by Jumbotron View Postword is from inside AMD that early engineering samples of the Zen 4 based Genoa are generating 29% higher IPC and 40% higher aggregate performance uplift over Milan at the SAME core count and the SAME clock speed of Milan.
I say: keep your expectations low, and you won't be disappointed. Also, you'll write better code, because you're not expecting ever-faster hardware to bail you out.
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Originally posted by M@GOid View PostBenchmarks aside, Intel can still count on "settled-in-their-ways" system admins to continue to sell their stuff. Paraphrasing IBM, "nobody was fired for buying Intel".
If things comes to worse, they can still lower their prices, just like AMD had to do on the Bulldozer era. It must have be anything but fun to be a Intel sales rep nowadays. A couple years ago, they could simply tell their clients this is the price, because we said so. Now they had to actually open their mouths and try convince some people not to change to AMD.
That said, i suspect the inarguable killer argument will be massively converged infrastructure. Despite the scary name, its simpler, cheaper & ~seamlessly expandable. its sorta the same magic that has won amd a succession of exaserver contracts, & much of it comes down to the quality & speed of the inter host connections. Its the new black, & intel is out classed by a big factor.
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Originally posted by Jumbotron View Post
Simple deduction from previous cpu architectural history, both Intel and AMD, open source reporting and Lisa Su herself intimating that Zen 4 would be so refined over Zen 2 & 3 as to be considered a new arch.
So..let's explore. Intel was famous until 14nm for their "Tick Tock" architecture advancement. The "Tick" was actually the die shrink and process enhancement of the previous "Tock" architecture change. Once Intel hit the 10nm brick wall they introduced an extended "Tock" enhancenent to existing architectures as the "Tick" die shrink broke down. And even these "Tock" enhancements became running jokes at Intel.
Along comes AMD who was stuck at 28nm for years with a completely worn out and moribund "Dozer/Driver" arch. So they implemented a MASSIVE clean sheet "Tock" architecture redesign with Zen. Zen+ is their "Tick". Zen 2 is another "Tock". Not a completely new clean sheet redesign from Zen or Zen+. But enough to be considered "new" microarch. Zen 3 COULD be considered either a "Tick" as it is a die shrink to 7nm. Or it COULD be considered an enhanced "Tock" of Zen 2 as Zen 3 did unify Zen 2 CCXs and L3 cache amongst other arch tweaks. Zen 3 also has a tweaked Infinity Fabric interconnect now improved enough to be called Infinity Architecture. But there still is no complete connection to everything, CPUs, GPUs, DSPs, FPGAs, NPUs, etc with full DMA and full cache coherency. And Zen 3 and Zen 2 and Zen+ and Zen and even Bristol Ridge, the last of the Dozer/Driver CPU's are still on AM4 sockets with DDR-4 memory and PCI 4.
Not Zen 4. First of all, Zen 4 needs a new socket as it will need DDR-5 and PCI 5. Second, Zen 4 will be connected to the full blown Infinity Architecture 3.0 with full DMA and Cache Coherency to all parts. Every CCX (and I suspect the CCX is going away) all Cache nodes, AI subprocessers, up to eight RDNA 3 and/or CDNA 3 GPUs per cabinet and more will independently communicate with zero memory copy. HSA will finally arrive nearly 15 years late.
In addition, word is from inside AMD that early engineering samples of the Zen 4 based Genoa are generating 29% higher IPC and 40% higher aggregate performance uplift over Milan at the SAME core count and the SAME clock speed of Milan. You don't get that from simply moving down from 7nm to 5nm. You don't get that simply from moving from DDR-4 to DDR-5. You don't get that from simply tweaking CCXs and cache.
You get that from a new architecture. A for real "Tock". Not a "Tick" shrink. Not a fake Intel like "Tock" enhancement that's so small it can't really be considered a new arch.
Viewed in it's entirety, Zen 4 will be a new architecture on a new platform.
Intel and AMD cores are rarely "new"; they just optimize it... Intel tick-tok prioritized architecture optimizations one time and then die shrink the other time. Intel "core" could qualify so could AMD Zen and RDNA. The rest is more or less optimization.
DDR5, pci5, infinity fabric, is "just" I/O. You could essentially get the same Zen3 cores on a smaller node. Don't get me wrong, porting Zen3 cores to 5nm could get you really good cores with reduced silicon area, up to 50% power savings, 25% faster or a combination thereof...Last edited by mppix; 16 March 2021, 05:00 PM.
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Originally posted by torsionbar28 View PostHonestly I'm more looking forward to what the storage technology will be for PCIe5 boards, at least on the client side. The M.2 connector does not carry enough electrical power to meet the PCIe5 spec...
... and if usb-c or PoE+ is any indication, we can do a lot of things for higher power + better power management over popular connectors...
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Originally posted by mppix View PostSays who?
Originally posted by mppix View Post... and if usb-c or PoE+ is any indication, we can do a lot of things for higher power + better power management over popular connectors...
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Originally posted by Jumbotron View PostZen 3 COULD be considered either a "Tick" as it is a die shrink to 7nm. Or it COULD be considered an enhanced "Tock" of Zen 2 as Zen 3 did unify Zen 2 CCXs and L3 cache amongst other arch tweaks.Test signature
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