Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

7nm AMD EPYC “Rome” CPU with 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)

techquila.co.in

Post reply on HN
Print view View original

151–160 of 160 posts

Re: 7nm AMD EPYC “Rome” CPU with 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)

#151

Post by RantyDave »

ksec wrote: post #46
reitzensteinm wrote: post #9

Note that the 1P variant costs only $4,955, or under $80 per core. The consumer chips cost roughly $50/core, making this the flattest ramp I can personally remember.

That is the brilliance of Chiplet strategy. Those 74nm 7nm Die are extremely cost effective. ( For reference they are even smaller than the SoC used in iPhone ) The 14nm I/O die ( 400mm2 ) seems to be most expensive part. I wonder what cost improvement could be done in that area. And Note: That 5K CPU has 256 MB of L3 Cache. May be I could Run the OS not in RAM, but in Cache.

Coreboot has some interesting stuff around configuring the cache - it briefly runs cache-only so that would make a plausible starting point.

Re: 7nm AMD EPYC “Rome” CPU with 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)

#152

Post by dr_zoidberg »

ksec wrote: post #76
Tuna-Fish wrote: post #73

Earlier quoted context omitted.

Note regarding Note: It actually has 16*16MB cache. The L3 is split into 16MB segments per CCX, and organized as a victim cache taking lines evicted from the 4 local L2 caches. That is, a single core cannot ever write to more than 16.5MB of cache. So there's not really any way to run system out of only cache, outside the tiny examples of early boot where all CPUs do this.

Thanks. Didn't come to my mind when I was writing that. So I stand corrected. I wonder if one day we put even more cache in the I/O Die. Or even Stacked DRAM directly on top of it.

There have been a few Intel processors with "L4 cache" (meant to be used as iGPU memory, and only if unused work as L4 cache) as listed here [0]. Broadwell was the only generation to have desktop processors with the eDRAM chip sitting by the side of the processor. Now it's only on a few higher end ultrabook processors [1, 2] -- look for those listed with L4 cache.

[0] https://en.wikichip.org/wiki/intel/microarchitectures/broadw...

[1] https://en.wikipedia.org/wiki/Skylake_(microarchitecture)#Mo...

[2] https://en.wikipedia.org/wiki/Kaby_Lake#Mobile_processors

Re: 7nm AMD EPYC “Rome” CPU with 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)

#153

Post by xvf22 »

Finding mainstream vendor offerings has been a bit more difficult with AMD. We recently bought 2 E-2146G servers from Dell (preferred vendor at the org.) because anything AMD was only offered as a 2 processor server which was overkill for the application. I would have gladly purchased AMD based servers instead if they were priced closely.

Re: 7nm AMD EPYC “Rome” CPU with 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)

#154

Post by alluro2 »

Scarbutt wrote: post #96
rolleiflex wrote: post #54

Earlier quoted context omitted.

I'm actually a designer, but I stopped using Adobe a very long time ago for unrelated reasons — when they switched to the subscription model. For that reason I didn't even try to run them. I do realise that might be an untenable position for someone in Hollywood since FCPX is not a match for Premiere / After Effects at that level, however, there are plenty of other things that do the job of Photoshop and Illustrator,…

FWIW, I have found Figma to be better than Sketch.

Same here - jumped the ship a couple of days ago and thoroughly impressed so far. Plugins system is sorrowly missed at some moments, but should be arriving soon from what I understood. Everything else, including performance (I'm amazed by how fast that WebGL through WebASM works) - better.

Re: 7nm AMD EPYC “Rome” CPU with 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)

#155

Post by sitkack »

ianai wrote: post #142
sitkack wrote: post #138

Earlier quoted context omitted.

In 2 to 3 cycles it won't be in their control. We are riding the buggies right now while ICE cars are blasting right past us.

My suspicion is it matters a great deal on OS stack until Microsoft supports ARM in Server. I’m sure the bsd/Linux OSes will have a much easier time transitioning. Edit-I’m seeing some articles that make it look like arm might already be usable on Windows. There’s still legacy software issues though.

In 2 to 3 cycles the OS will disappear as a variable in the deployment target. You won't know about it, you won't care about it, it won't be a dimension you think about.

Re: 7nm AMD EPYC “Rome” CPU with 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)

#156

Post by stefanfisk »

cududa wrote: post #146
agloeregrets wrote: post #35

Earlier quoted context omitted.

In fairness, they are in a much better situation. They could swap to AMD with no real arch changes but I imagine they also would prefer their own CPUs. The fact of the matter is that these CPUs are built on the same exact process as the A12 by the same fab. I would expect, at the scale they are working, a next Apple ARM cpu could be scaled to Rome core counts and have “close” performance at hilariously lower prices.

That’s not really true. Most of MacOS is optimized for intel processors. Things like branch prediction and media encoding/ deciding are extremely different at a low level on AMD/ Intel, and Apple would need to make an enormous investment to rewrite all their perf specific components for AMD.

isn't most of that stuff already implemented for iOS?

Re: 7nm AMD EPYC “Rome” CPU with 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)

#157

Post by ianai »

sitkack wrote: post #155
ianai wrote: post #142

Earlier quoted context omitted.

My suspicion is it matters a great deal on OS stack until Microsoft supports ARM in Server. I’m sure the bsd/Linux OSes will have a much easier time transitioning. Edit-I’m seeing some articles that make it look like arm might already be usable on Windows. There’s still legacy software issues though.

In 2 to 3 cycles the OS will disappear as a variable in the deployment target. You won't know about it, you won't care about it, it won't be a dimension you think about.

Where are you getting this POV? I’m curious to hear it further fleshed out.

Re: 7nm AMD EPYC “Rome” CPU with 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)

#158

Post by rbanffy »

ianai wrote: post #157
sitkack wrote: post #155

Earlier quoted context omitted.

In 2 to 3 cycles the OS will disappear as a variable in the deployment target. You won't know about it, you won't care about it, it won't be a dimension you think about.

Where are you getting this POV? I’m curious to hear it further fleshed out.

A container doesn't really care much about what runs it, as long as the runtime provides the right endpoints.

A serverless environment cares even less.

Re: 7nm AMD EPYC “Rome” CPU with 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)

#159

Post by devbat8712 »

leemailll wrote: post #34
rolleiflex wrote: post #22

I do have an AMD Hackintosh, I don't see any reason you wouldn't be able to use these as a dev Hackintosh machine. It's gorgeously fast with my Ryzen 2700x, eats compilation time like no one's business and it's stable. And it's something around 1/4th the price of the same horsepower from native Intel Macs. I can't imagine the cost delta of a EPYC Rome Hackintosh to its Intel counterpart. It's not like I cheaped out e…

How about those adobe applications? I heard that PS, Pr, or Ai need special patch to run on amd machines

I used to have an amd hackintosh with an a10, and I used premiere pro and Photoshop all the time with no issues.

Re: 7nm AMD EPYC “Rome” CPU with 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)

#160

Post by ianai »

rbanffy wrote: post #158
ianai wrote: post #157

Earlier quoted context omitted.

Where are you getting this POV? I’m curious to hear it further fleshed out.

A container doesn't really care much about what runs it, as long as the runtime provides the right endpoints. A serverless environment cares even less.

I defer to the other replies to your position. Though I’d love to stop caring about underlying OSes.
Post reply on HN