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redtuesday

499 karma · joined April 5, 2013

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redtuesday··on AMD's Future in Servers: New 7000-Series CPUs Launched and EPYC Analysis
I would not be surprised if there will be no 14 core part. None of the Zen based CPU's so far have a uneven CCX configuration but 14 cores would require that.
redtuesday··on AMD's Future in Servers: New 7000-Series CPUs Launched and EPYC Analysis
It will not support LRDIMM and RDIMM, which means you can get "only" 256 GByte of memory [0] although the CPU would support 1 TByte.

[0] https://www.reddit.com/r/Amd/comments/6icdyo/amd_threadrippe...

redtuesday··on Nvidia Announces PCIe Tesla V100
With the incredible die size of Volta, and the cost associated with it, I wonder if the rumors are true that AMDs next gen GPU codenamed Navi is using the same strategy as their Zen CPUs (Ryzen, Threadripper, Epyc) - multiple smaller dies connected for better yields and lower cost.

Would something like that be even possible with GPUs? I know the Exascale paper from AMD mentions GPU chiplets which sound like this.

redtuesday··on AMD EPYC 7000 CPUs: 32 cores, 64 threads, 8 memory channels, 128 PCIe lanes
Kind of, but not as good/detailed [0]

[0] http://products.amd.com/de-de

redtuesday··on Scala Native 0.3.0 released – including new garbage collector (Immix) and more
The presentation slides about the new gc can be found here: https://github.com/densh/talks/raw/ebb8f1f4b54bdc6d1a55b962d...
redtuesday··on AMD EPYC 7000 CPUs: 32 cores, 64 threads, 8 memory channels, 128 PCIe lanes
Then you are probably aware that it has not mattered because of Intels shady tactics. [0][1][2][3] etc.

[0] https://www.wired.com/2009/12/ftc-sues-intel-for-anti-compet...

[1] http://www.silicon.co.uk/workspace/dell-pays-65million-to-se...

[2] http://techreport.com/news/8547/does-intel-compiler-cripple-...

[3] http://www.agner.org/optimize/blog/read.php?i=49#49

redtuesday··on Pinterest Raises $150M at 2015 Share Price
Yeah, I always search with -site:pinterest.* (text so the star after the dot is not parsed).
redtuesday··on Apple Teases Upcoming Space Gray iMac Pro, "the most powerful Mac ever"
What is misleading about that? I merely stated that they are the same chip at the start, but Intel deactivates features on the extreme series to segregate the market (nothing wrong with that).

Also see my edit of my original post where I mistakenly misread "line" as "chip" as stated.

> They bin things for a reason.

Yes, of course, so that the extreme series doesn't cut into the margins of the server market. If you could run RAID 5 and 10 without hardware dongles and ECC on the extreme series some smaller companies would probably prefer the i9 18 core for 2000$ to the 3000-4000$ 18 core Xeons. Again, this is fine, but Xeons and extreme series start of as the same chip. That's all I wanted to say on top of my correction of my original post.

redtuesday··on Apple Teases Upcoming Space Gray iMac Pro, "the most powerful Mac ever"
They're the same chip, but one of them has ‎artificially deactivated features and is a different line, yes. Misread the line part as chip.
redtuesday··on Apple Teases Upcoming Space Gray iMac Pro, "the most powerful Mac ever"
No, they are not. All extreme edition CPU's from Intel are cut down Xeons with deactivated features (like ECC support), and the need to buy hardware dongles to make RAID 5 and RAID 10 work.

EDIT: read the children posts. I mistakenly read "chip" instead of "line". Of course Xeons are a different line compared to Intels extreme line. The above about the extreme series CPU's being cut down Xeons is still true but in this context wrong and irrelevant.

redtuesday··on Apple Teases Upcoming Space Gray iMac Pro, "the most powerful Mac ever"
Yeah, probably the biggest reason. Maybe this will change when Thunderbolt will be royalty-free next year. AMD has the advantage of being the only company on this planet which can combine a high performance x86 CPU and high performance GPU.
redtuesday··on Rewrite Linux Kernel in Rust?
But you wrote "Rust has no backward compatibility" who cares what libraries/projects do?
redtuesday··on Possible RFID chip found on Intel's new i9 CPU after removing heatspreader
The relevant part:

> There appears to be an RFID chip in the corner of the Intel i9-7900X that we looked at, which would lead us to believe that the chip is capable of storing user information. Der8auer’s theory is that this could be used to store user overclock data, e.g. maximum stable OC. Such a chip could also be used for RMA processes, theoretically.

redtuesday··on WebAssembly: Mozilla Won
Yeah, wondering the same. Is there an advantage to type it into the address bar? Maybe a faster key combination or something?
redtuesday··on RISC-V Pros and Cons
From what I have read [0] the j-core people have that on the roadmap for 2019+.

Seeing that Sunway TaihuLight still uses DDR3 I wonder how much power they could save by going with DDR4 and it's lower voltage.

It's cool to see so many older ISAs coming back.

[0] http://j-core.org/roadmap.html

redtuesday··on RISC-V Pros and Cons
I don't know as I don't have enough knowledge about the matter. I'm asking because on Wikipedia and in videos about jcore (which uses SuperH) it is touted as a nice ISA:

> High code density compared to other 32-bit RISC ISAs such as ARM or MIPS[8] important for cache and memory bandwidth performance.

redtuesday··on RISC-V Pros and Cons
Could a chip based on the SuperH ISA (off which the patents expire) [0] like JCore compete with RISC-V if similar effort would be put into it?

[0] https://en.wikipedia.org/wiki/SuperH

redtuesday··on All AMD ThreadRipper CPU's will have 64 PCIe Lanes
> I think given all the other Zen CPUs support it i think that is a given.

Yes, Ryzen can use ECC if the motherboard maker supports it, but ECC support is not validated. [0]

[0] https://www.reddit.com/r/Amd/comments/5x4hxu/we_are_amd_crea...

redtuesday··on Trump 'poised to quit Paris climate deal'
As a non american I would have agreed if Sanders would have won against Shillary and then Trump.
redtuesday··on All AMD ThreadRipper CPU's will have 64 PCIe Lanes
No, there was also no word on official/validated ECC support, only that Threadripper will launch this summer. But people hope for something between 999$ (since it is two Ryzen R7) and 1499$ for the 16 core CPU. 999$ would be awesome, but 1499$ sounds much more realistic, maybe even more, since it has a much larger socket, high end platform bonus etc.
redtuesday··on All AMD ThreadRipper CPU's will have 64 PCIe Lanes
Maybe even better bins if the rumors are true, which put the 1998 X at 3.5 ghz for 16 cores (and boost on single core to 3.9 ghz).

But I believe it only when I see it. Especially since the rumors said Threadripper will only have 44 PCIe lanes like Intel, which as we now know was false (and was weird previously because Naples has 128 PCIe lanes).

redtuesday··on All AMD ThreadRipper CPU's will have 64 PCIe Lanes
But Threadripper compares to Intels i9 series. Xeons competition is Naples/Epyc, which has 128 PCIe lanes in a single socket.
redtuesday··on All AMD ThreadRipper CPU's will have 64 PCIe Lanes
Intel lowered their prices with the release of the 18 core for 2000$. Before AMD became competitive again you had to pay 1700$ for only 10 cores or go for a 3000$ or 4000$ 18 core Xeon.

EDIT - of course there are also Xeons between 10 and 18 cores, but it should show that you had to pay much more to get 18 cores, or only slightly less for much less cores.

redtuesday··on All AMD ThreadRipper CPU's will have 64 PCIe Lanes
They should do the same for software companies that produce software for the governments, with the requirement to open source the software.
redtuesday··on All AMD ThreadRipper CPU's will have 64 PCIe Lanes
Intel X99 mainboards (socket 2011-3) ranged from 200-600 us dollars. AMDs offerings typically go for less than Intels, but Threadripper has an gigantic 4094 pin LGA socket, so I guess this will negate the typical AMD price advantage regarding motherboards and we will see prices in the 200-600 us dollar range as well.

EDIT - and since Threadripper will have 20 more PCIe lanes compared to Intels i9 series, motherboard makers will hopefully take advantage of this to offer more IO, which probably also increases the price.

redtuesday··on All AMD ThreadRipper CPU's will have 64 PCIe Lanes
Yeah, depending on the configuration it would maybe even be enough for 7 GPU's with 8x PCIe 3.0 (60 of the 64 are feeding PCIe and M.2 slots, 4 go to the chipset). Seems like it will be a nice CPU to use for machine learning.

Other sites also report that it will support 2 TByte of RAM like the single socket Naples/Epyc, but LRDIMM and official/validated ECC support was not mentioned in the stream.

redtuesday··on Intel Announces Skylake-X: Bringing 18-Core HCC Silicon to Consumers
Nice, 64 PCIe 3.0 lanes for all Threadripper SKUs. That would be enough for 7 GPU's with 8x PCIe 3.0 (60 of the 64 are feeding PCIe and M.2 slots, 4 go to the chipset). Seems like it will be a nice CPU to use for machine learning.

Other sites also report that it will support 2 TByte of RAM like the single socket Naples/Epyc, but LRDIMM and official/validated ECC support was not mentioned in the stream.

redtuesday··on Intel Announces Skylake-X: Bringing 18-Core HCC Silicon to Consumers
It seems Skylake X will not be soldered [0] unlike previous HEDT CPU's from Intel. AMD even solders their normal consumer CPU Ryzen. How much will Intel save with this? 2 to 4 dollars per CPU?

I'm also curious what that means for the thermals. Intels 4 core parts have much better thermals when delided to change the bad TIM.

[0] https://www.overclock3d.net/news/cpu_mainboard/intel_s_skyla...

redtuesday··on Intel Announces Skylake-X: Bringing 18-Core HCC Silicon to Consumers
Probably, but more likely because of AMD's HEDT (high end dedktop) platform called Threadripper which will have up to 16 cores (32 Threads).

Before AMD announced Threadripper Intel had only a 12 core chip on the roadmap for the x299 platform, and charged around 1700$ for their 10 core chip. Now they will be charging 2000$ for 18 cores.

Competition is such a nice thing. Glad that AMD is back in the CPU game. Can only be good for us customers.

redtuesday··on GNU Guix and GuixSD 0.13.0 released
Ah, good to know. Just tried sbt (build tool for scala) with Nix (have no experience with Guix, but like that everything is in the same language) and it indeed creates .ivy and .sbt caches in the home directory. Everything else goes into the store like it should.
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