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Aug 262017

No. The title is just click-bait (which won’t accomplish much).

AMD Ryzen was interesting because it restored AMD’s competitiveness as compared to Intel for the non-enthusiast processor for desktops and laptops. Whereas AMD’s Epyc was interesting because it restored AMD’s competitiveness in the data centre. Both are good things because Intel has been rather slow at improving their processor over the last few years – enough that people are taking a serious look at a non-compatible architecture (the ARM which is found in your smartphone) in the data centre.

Threadripper itself is of interest to a relatively small number of people – those after a workstation-class processor to handle highly threaded workloads. A market that was previous catered to by the Xeon processor, so although Threadripper looks expensive, it is in fact pretty cheap in comparison to Xeon processors. So ‘scientific’ workstations should become cheaper.

And the significant advantage they have with I/O (64 PCIe lanes as opposed to a maximum of 44 for the X299 platform would be useful for certain jobs. Such as medium-sized storage servers with lots of NVMe caching, or graphics-heavy display servers (room sized virtual reality?).

But for gamers? Not so much. Almost no games use lots of threads (although it would be useful to change this), so the main use the extra power of Threadripper will only get used by other things that gamers do. Perhaps game streaming and/or using the unused power to run virtualised storage servers.

Jan 072007

I recently replaced an elderly SGI Octane2 workstation which had 2 CPUs (400MHz MIPS-based), 1.5Gbytes of memory, and 3 elderly SCSI disks with a nice new Sun Ultra40 … 2 AMD Opteron 248s, 2Gbytes memory, and 2 mirrored SATA drives. It is interesting to compare the difference between an old-fashioned workstation originally designed in the middle to late 1990s with a 21st century PC. Not that I’m going to produce hard numbers from useful benchmarks … that is just too much work, and in some ways it is the feel of the differences that are important.

Of course this is not really a fair comparison. Whilst the SGI Octane is now very elderly and due to SGI managerial incompetence has not kept pace with PC performance as it should have done, it is after all a machine that originally cost 10-20 times the cost of the PC I am comparing it to. In car terms, I’m comparing a 20-year old Mercedes with a new and cheap Ford. I should point out that much of the software I am using is very much the same on both machines … the Enlightenment window manager, Sylpheed Claws as the mail client, Firefox as the browser, LyX as the word processor, and a text terminal for much of the remainder.

The PC is considerably quicker than the SGI of course. The graphic user interface is a good deal snappier, and most of the applications offer very welcome improvements in performance. With the exception of GIMP however, none of this performance increase is really essential; my old SGI ran pretty much everything my PC does, fast enough to get the job done. GIMP performance is the reason I upgraded, and here the difference is quite dramatic … filters that previous required patience now run almost instantly; when you are repeatedly trying things out in GIMP on quite large images this performance increase makes some things feasible that simply were not before.

There is one area where the SGI does offer some advantage over the PC; something I was expecting. The PCs disks are overall somewhat faster the the disks in the SGI (and of course I don’t have to pay to mirror my disks!), but the SGI tends to work more smoothly under high load. I’ve noticed before with the ‘low end’ on disks in PCs, that if you start to drive your disks very hard, the computer will sometimes stutter. Essentially the SGI was slower, but smoother under high disk load than the PC.

If was not for the need to run GIMP extensively (and the appeal of more standard add-on hardware like USB hard disks), there is no reason why I could not continue with the SGI. The tendency we have in the computing arena of replacing computers every few years is not a healthy one.

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