211–220 of 238 posts
Earlier quoted context omitted.
The SO-DIMM pinouts are different enough that this is not true either.
What can I say? I have two, identical TS140s sitting in the next room. One is running G.Skill non-ECC and the other is running Kingston ECC modules.
Earlier quoted context omitted.
Just interested: What's your use case for ECC? Do you intend to run a server on it and aim for highest stability?
I'm putting money on something to do with ZFS. Turns out bit flips are significantly more common than had been thought in the past, which makes a error-correcting file system somewhat risky to use with normal non-ecc ram.
And that's for embedded microcontrollers and RAM that aren't nearly pushing it to extremely small processes.
Let me just quote IEC 61508, where "FIT" means 10e-9 h:
Causes of soft errors are: (1) Alpha particles from package decay, (2)
Neutrons, (3) external EMI noise, (4) Internal cross-talk. External EMI noise is covered by other requirements of
this international standard.
A soft error occurs when a radiation event causes enough of a charge disturbance to reverse or flip the data state
of a low energized semiconductor memory cell, register, latch, or flip-flop. The error is called “soft” because the
circuit itself is not permanently damaged by the radiation. Soft-errors are classified in Single Bit Upsets (SBU) or
Single Event Upsets (SEU) and Multi-Bit Upsets (MBU).
The soft error rate has been reported (see a) and i) below) to be in a range of 700 Fit/MBit to 1 200 Fit/MBit for
(embedded) memories. This is a reference value to be compared with data coming from the silicon process with
which the device is implemented. Until recently SBU were considered to be dominant, but the latest forecast (see
a) below) reports a growing percentage of MBU of the overall soft-error rate (SER) for technologies from 65 nm
down.
The following literature and sources give details about soft-errors:
a) Altitude SEE Test European Platform (ASTEP) and First Results in CMOS 130 nm SRAM. J-L. Autran,
P. Roche, C. Sudre et al. Nuclear Science, IEEE Transactions on Volume 54, Issue 4, Aug. 2007
Page(s):1002 - 1009
b) Radiation-Induced Soft Errors in Advanced Semiconductor Technologies, Robert C. Baumann, Fellow,
IEEE, IEEE TRANSACTIONS ON DEVICE AND MATERIALS RELIABILITY, VOL. 5, NO. 3, SEPTEMBER 2005
c) Soft errors' impact on system reliability, Ritesh Mastipuram and Edwin C Wee,
Cypress Semiconductor, 2004
d) Trends And Challenges In VLSI Circuit Reliability, C. Costantinescu, Intel, 2003, IEEE Computer Society
e) Basic mechanisms and modeling of single-event upset in digital microelectronics, P. E. Dodd and L. W.
Massengill, IEEE Trans. Nucl. Sci., vol. 50, no. 3, pp. 583–602, Jun. 2003.
f) Destructive single-event effects in semiconductor devices and ICs, F. W. Sexton, IEEE Trans. Nucl. Sci.,
vol. 50, no. 3, pp. 603–621, Jun. 2003.
g) Coming Challenges in Microarchitecture and Architecture, Ronen, Mendelson, Proceedings of the IEEE,
Volume 89, Issue 3, Mar 2001 Page(s):325 – 340
h) Scaling and Technology Issues for Soft Error Rates, A Johnston, 4th Annual Research Conference on
Reliability Stanford University, October 2000
i) International Technology Roadmap for Semiconductors (ITRS), several papers.Earlier quoted context omitted.
But if you use ZFS, chances are you will want to have lots of disk space and lots of disks, too. If so, why buy a small box?
Because you are paranoid and also have a small apartment. I have a mini-itx home server build with 16 gb of ram and 4 WD 3tb RED drives. It doesn't run ZFS because I don't have ECC ram in it, but it's the smallest computer I could buy that would fit the hard disks I already owned. If I were starting from scratch I'd probably use 2.5" drives instead, and if I wasn't working for a non-profit, I'd probably use SSDs now…
See also the Intel NUC thing: http://www.intel.com/content/www/us/en/nuc/nuc-kit-nuc6i7kyk... What really astonishes me though is how you can have these really nice machines and Apple doesn't bother to update the Mac mini. Seriously, an Apple version of this would be a nice desktop.
Earlier quoted context omitted.
> an Apple version of this would be a nice desktop. It would compete with the IMac then, and with their notebooks too. Maybe Apple should charge enough of a premium for the mini to justify that loss.
>> It would compete with the IMac then, and with their notebooks too. Companies that try to avoid competing with themselves often fail quickly and spectacularly (after this approach appearing to work well for an extended time).
No audio output as far as I can tell, and after I plug in my USB keyboard and mouse I'll be out of ports.
It looks nice, but beyond looks I don't really get the appeal. If you want and/or need the power, and you're already planning to have 3-6 monitors on your desk, why not go for a slightly larger box that can hold reasonable cooling solutions that don't sound like a jet taking off when the PC is under the slightest load? IME, HP is terrible about considering the noise of their designs. Our current work laptops are HP 1…
One upside is that this will fit in your carry-on luggage. Cheaper than a beefy laptop, but I'm not sure portability buys you much if you'd need to think about mouse/keyboard/monitor too.
Maybe people just want more physical room?
See also the Intel NUC thing: http://www.intel.com/content/www/us/en/nuc/nuc-kit-nuc6i7kyk... What really astonishes me though is how you can have these really nice machines and Apple doesn't bother to update the Mac mini. Seriously, an Apple version of this would be a nice desktop.
Absolutely - my main computer is an iMac, which will soon be replaced by another iMac (5K), however as someone who builds and upgrades a gaming rig as well, I always look with envy towards the very affordable world of PCs. I'd love to be able to slap macOS on custom build computers for a fraction of the price that is attached to Apple hardware.
Earlier quoted context omitted.
I also have the Skullcanyon, as a laptop replacement machine. None of my previous personal computers have had ECC RAM, but none have had more than 16GB either. What is your use case that benefits from error-correction, if you please?
The #1 consumer use case that would benefit from error-correction would be not having remote exploits due to https://en.wikipedia.org/wiki/Row_hammer
Earlier quoted context omitted.
I also have the Skullcanyon, as a laptop replacement machine. None of my previous personal computers have had ECC RAM, but none have had more than 16GB either. What is your use case that benefits from error-correction, if you please?
The #1 consumer use case that would benefit from error-correction would be not having remote exploits due to https://en.wikipedia.org/wiki/Row_hammer