Personal computing discussed

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by bhtooefr
Fri Aug 24, 2018 7:14 am
Forum: Processors
Topic: "Foreshadow" speculative execution attacks outlined
Replies: 53
Views: 1760

Re: "Foreshadow" speculative execution attacks outlined

Worth noting that the license that got applied to this microcode is one that Intel has used elsewhere: The license from the microcode: https://paste.ubuntu.com/p/z2F3Cj6R8Q/ The license from an Intel MIPI camera driver from 2017: https://github.com/Intel-5xx-Camera/intel-camera-adaptation/blob/maste...
by bhtooefr
Thu Jan 18, 2018 6:43 am
Forum: Graphics
Topic: Video card prices
Replies: 343
Views: 32473

Re: Video card prices

Yeah, HDMI can't do dual-link DVI, 1920x1200 is the max for single-link DVI.

DisplayPort could, with an active adapter, go to dual-link DVI, but...
by bhtooefr
Wed Jan 03, 2018 7:49 am
Forum: Processors
Topic: Intel Processor bug incoming?
Replies: 236
Views: 22864

Re: Intel Processor bug incoming?

Shift that a bit - Haswell/Broadwell and Skylake/Kaby Lake/Coffee Lake should have moderate impact. Westmere should have similar (higher) impact to Ivy (and Sandy) Bridge, because it has PCID. Nehalem and earlier should have very high impact, not having PCID. Also, I've seen a claim (but it was on H...
by bhtooefr
Wed Jan 03, 2018 6:15 am
Forum: Processors
Topic: Intel Processor bug incoming?
Replies: 236
Views: 22864

Re: Intel Processor bug incoming?

In the sense that it's being used here, "speculative execution" really means "branch prediction". (Nowadays it's often used to mean "execute both sides of the branch", but it used to just mean branch prediction 20 years ago, and I don't think anyone's actually doing it ...
by bhtooefr
Tue Jun 13, 2017 6:04 am
Forum: General Hardware
Topic: A crazy idea?
Replies: 42
Views: 2394

Re: A crazy idea?

And they don't have their own silicon any more, they're just using AMD silicon.
by bhtooefr
Mon Jun 12, 2017 10:40 pm
Forum: General Hardware
Topic: A crazy idea?
Replies: 42
Views: 2394

Re: A crazy idea?

On 366s, it usually required some more voltage - 2.1-2.2 V usually, stock being 2.0, as Mendocino didn't like going much over 500. My pair of 366s crashed quite quickly at 550 @ 2.0 V. Tonight's project was going to be cranking it up to 550, but the motherboard had other plans. Now, 300As or 333s, o...
by bhtooefr
Mon Jun 12, 2017 10:27 pm
Forum: General Hardware
Topic: A crazy idea?
Replies: 42
Views: 2394

Re: A crazy idea?

Surprisingly snappy for how slow they are (they're 366s), and that was with the Chromatic Mpact2, which was using VgaSave.

Although, I need to try for Win7 once I get the board resurrected.
by bhtooefr
Mon Jun 12, 2017 10:01 pm
Forum: General Hardware
Topic: A crazy idea?
Replies: 42
Views: 2394

Re: A crazy idea?

Or just use polymers whenever possible, too... Which, I need to pull the Abit BP6 out of my "new" build, because, as it turns out... original Jackcon caps. There was one that looked like it miiiiiiight have been slightly bulged a week ago before I did the build. It stopped POSTing today (b...
by bhtooefr
Sun Jun 11, 2017 3:44 pm
Forum: Processors
Topic: VME Broken on AMD Ryzen
Replies: 28
Views: 4167

Re: VME Broken on AMD Ryzen

And AGESA 1.0.0.6 includes a microcode update to patch this issue, apparently: http://www.os2museum.com/wp/vme-fixed-on-amd-ryzen/
by bhtooefr
Thu Jun 01, 2017 9:25 pm
Forum: The Back Porch
Topic: EPA vs. FCA (Here we go again!)
Replies: 24
Views: 1725

Re: EPA vs. FCA (Here we go again!)

Turbines are expensive to make and have high heat & fuel consumption compared to a reciprocating engine, not so? From Wikipedia https://en.wikipedia.org/wiki/Engine_efficiency#Internal_combustion_engines Gasoline car engine 25-50% Diesel car ~45% Turbine 46% simple cycle and 61% combined cycle ...
by bhtooefr
Thu Jun 01, 2017 10:32 am
Forum: The Back Porch
Topic: EPA vs. FCA (Here we go again!)
Replies: 24
Views: 1725

Re: EPA vs. FCA (Here we go again!)

There are actually benefits to AWD for fuel efficiency in hybrids and especially electrics, if it's a dual or more motor setup - better control of regenerative braking, and especially on electrics, potentially better optimized gearing for efficiency - but for straight ICE, yeah, no. Thing is, though...
by bhtooefr
Thu Jun 01, 2017 7:38 am
Forum: The Back Porch
Topic: EPA vs. FCA (Here we go again!)
Replies: 24
Views: 1725

Re: EPA vs. FCA (Here we go again!)

So, the big thing is that nitrogen oxide emissions regulations are hard for any engine that has excess air in the cylinder - heat plus the nitrogen in air plus excess oxygen equals nitrogen oxide emissions. And, NOx is a smog precursor (although in the chemistry of smog formation acts weirdly with v...
by bhtooefr
Thu Jun 01, 2017 7:12 am
Forum: SFF Station
Topic: SFF Zen 8c/16t system.
Replies: 198
Views: 20443

Re: SFF Zen 8c/16t system.

I'd really like to see Threadripper in mITX similar to one of the mITX X99 boards. It's doable but I highly doubt any of the mobo makers are seeing it as a high priority and I'd settle for mATX. Frankly my use case is niche.. compute node in a home lab at prices similar to say a bare bones *used De...
by bhtooefr
Mon May 15, 2017 8:36 am
Forum: The Back Porch
Topic: NIO EP9 is now the fastest supercar?
Replies: 21
Views: 2414

Re: NIO EP9 is now the fastest supercar?

That would help, although the highest-power system I'm aware of for this is KAIST OLEV, at 100 kW. A good supplement, but you'd still need to spend time at low speed or stopped to charge. Also, in the context of endurance racing, the crown jewel of endurance racing is the 24 Hours of Le Mans, and mu...
by bhtooefr
Mon May 15, 2017 7:34 am
Forum: The Back Porch
Topic: NIO EP9 is now the fastest supercar?
Replies: 21
Views: 2414

Re: NIO EP9 is now the fastest supercar?

Hmm, maybe they did go and make it road legal - I know when it was unveiled, it was just a track car.
by bhtooefr
Mon May 15, 2017 6:58 am
Forum: The Back Porch
Topic: NIO EP9 is now the fastest supercar?
Replies: 21
Views: 2414

Re: NIO EP9 is now the fastest supercar?

In the case of an LMP-style electric, I'd put the battery where the engine used to be, and extend forward beside the driver. (Note that every LMP1 hybrid has had the energy storage beside the driver.) So, it'll be fully forward of the rear wheels, and you could just lift a bodywork section, and pull...
by bhtooefr
Mon May 15, 2017 6:28 am
Forum: The Back Porch
Topic: NIO EP9 is now the fastest supercar?
Replies: 21
Views: 2414

Re: NIO EP9 is now the fastest supercar?

The problem with the NIO EP9 record is that it's not even a street-legal supercar. Somewhere I've seen someone pointing out that it beat the Pagani Zonda R, but if you're including street-illegal cars, that's not the car to beat . The car to beat would be the Porsche 956, which set a 6:11.13 on the ...
by bhtooefr
Sat May 13, 2017 7:28 am
Forum: Processors
Topic: VME Broken on AMD Ryzen
Replies: 28
Views: 4167

Re: VME Broken on AMD Ryzen

That's AMD's full chipset driver package, though, for all platforms. That doesn't say anything for what Ryzen supports. And, Ryzen isn't compatible with Windows 8.1 either - Microsoft made the call that 8.1 won't get Kaby Lake, Bristol Ridge, or Ryzen support, even though it's in mainstream support.
by bhtooefr
Fri May 12, 2017 5:48 pm
Forum: Processors
Topic: VME Broken on AMD Ryzen
Replies: 28
Views: 4167

Re: VME Broken on AMD Ryzen

Ryzen may be "x86 compatible" but both AMD and Intel have culled older OSes from their support list, Vista was the first OS that ditched V86 mode entirely and Ryzen is officially a Windows10-only product. Actually, XP x64 and Server 2003 x64 did that before Vista. And, 32-bit versions of ...
by bhtooefr
Fri May 12, 2017 2:51 pm
Forum: Processors
Topic: VME Broken on AMD Ryzen
Replies: 28
Views: 4167

Re: VME Broken on AMD Ryzen

Well with the massive cash-rich giants like Intel and Microsoft both refusing to support old OSes, I doubt AMD will have the resources or incentive to burden their new product with obsolete 16-bit legacy software support. I suspect the solution for 16-bit software is soon going to be emulation rath...
by bhtooefr
Fri May 12, 2017 6:09 am
Forum: Processors
Topic: VME Broken on AMD Ryzen
Replies: 28
Views: 4167

VME Broken on AMD Ryzen

http://www.os2museum.com/wp/vme-broken-on-amd-ryzen/ This would be of rather minor importance - it's only going to affect 16-bit processes running in V86 mode on a 32-bit OS (or memory manager, JemmEx for FreeDOS being the cited one) - if it weren't for the fact that XP and Server 2003 execute the v...
by bhtooefr
Thu May 11, 2017 5:00 pm
Forum: The Back Porch
Topic: Post your invention for the TR Napkin Sketch Contest thread
Replies: 32
Views: 6456

Re: Post your invention for the TR Napkin Sketch Contest thread

http://bhtooefr.org/images/TRfur-eentry.jpg So, what you're looking at here is the future of luggable computing. ~23" 4K LCD, full RGB backlit keyboard, mouse hole in the front, RGB case fan... and a gasoline filler and an exhaust pipe? Inside, it becomes more clear what's going on. The gasoli...
by bhtooefr
Fri May 05, 2017 8:55 am
Forum: SFF Station
Topic: SFF Zen 8c/16t system.
Replies: 198
Views: 20443

Re: SFF Zen 8c/16t system.

Well, and then there's the DAN A4 SFX, which is one of the smallest possible cases to take a full-size graphics card, and the case's designer actually validated a cooling solution or two for 135 watt Haswell-E parts, and it's designed to keep high-end graphics cards (if they're blower-cooled, anyway...
by bhtooefr
Fri May 05, 2017 6:57 am
Forum: SFF Station
Topic: SFF Zen 8c/16t system.
Replies: 198
Views: 20443

Re: SFF Zen 8c/16t system.

Something that will fit in a SFF case without having to buy a third party HSF. What I meant was I knew what you want but I can't imagine that many builders are concerned about SFF boxes with high end procs. There's enough demand for it that ASRock has two different Mini-ITX X99 motherboards . (One ...
by bhtooefr
Thu May 04, 2017 11:43 pm
Forum: Processors
Topic: Looks like RyZen got caught cheating on benchmarks
Replies: 64
Views: 6170

Re: Looks like RyZen got caught cheating on benchmarks

Well, they are intentionally adding delays and taking measures to ensure that those delays don't get optimized out. (As I understand, a lot of crypto code at that level ends up getting tested on every new CPU design to ensure that each code branch is actually executing at the same speed, and hand-de...
by bhtooefr
Thu May 04, 2017 8:47 pm
Forum: Processors
Topic: Looks like RyZen got caught cheating on benchmarks
Replies: 64
Views: 6170

Re: Looks like RyZen got caught cheating on benchmarks

The only downsides I can think of are: 1. Code which depends on timing loops may misbehave. In general timing loops are a bad idea anyway. Execution time of specific instruction sequences is already unpredictable enough on modern architectures (clock speeds vary widely due to power saving modes, an...
by bhtooefr
Thu May 04, 2017 6:50 pm
Forum: Processors
Topic: PC World article on RISC-V
Replies: 5
Views: 1199

Re: PC World article on RISC-V

Well, the original RISC-V IP is BSD-licensed, so I'd guess that SiFive's implementation isn't open source. However, charging a licensing fee to get access to open source - even GPL - binaries is allowed, it's just that in the GPL case, you have to provide the source code to anyone who gets the binar...
by bhtooefr
Sun Mar 26, 2017 6:40 pm
Forum: Processors
Topic: A link that will send PC enthusiasts back to 1999...
Replies: 23
Views: 4398

Re: A link that will send PC enthusiasts back to 1999...

Remember MagnaRAM?

It's funny how stuff like that makes a comeback - every major OS now has it integrated (Linux as of 3.11, OS X 10.9, and Windows NT 10.0.10586).
by bhtooefr
Tue Mar 21, 2017 5:03 pm
Forum: Storage
Topic: WD drives have Extra-sensitivity to vibration and restarts?
Replies: 25
Views: 2630

Re: WD drives have Extra-sensitivity to vibration and restarts?

Samsung releasing a clearly broken product, then dragging their feet on a fix, is one of the reasons I am (still) boycotting Samsung. Factor in the Note 7 battery fiasco, and the washing machines that fly apart if the load is unbalanced, and there seems to be a pattern of cutting corners lately. I ...