Doesn't the I4, Pentium G, and Celeron support of ECC also depend on the motherboard chipset enabling ECC despite the memory controller being in the CPU?
can you think of a way to do those tests with less cost?
The problem with the software only test is that it does not verify the operating margin in timing, voltage, and temperature. If the motherboard supports it, then raising the memory operating frequency by say 10% and lowering the DRAM operating voltage by say 10% and *then* running the software only test like memtest86 or maybe the Prime95 stress test should work to detect marginal DRAM.
I've wondered for a long time why unregistered ECC hasn't become the default on desktops while reserving buffered DIMMs for servers.Mass production would likely erase any price advantage of non-ECC memory.
Adding the extra 8 bits per 64 bit line would always raise the price 12.5% although that could be insignificant. There are also some boot time issues because memory has to be initialized which takes time and adds complexity.
I am inclined to blame Intel as far as why ECC is not more common since they use this feature for market segmentation.
if you can get two or more bits to shift inside a 64-bit chunk, then ECC doesn't help.
Reporting on the event or halting the machine upon detection of a double bit error *is* better than missing it completely and some triple bit errors would be detected as well. If chipkill ECC was being used which is commonly available, then up to 4 bits within a nibble boundary would be detected and corrected.
AMD has their socket AM1 processors which support ECC memory and encryption but lack the built in ethernet which may not be a big loss since the processors and motherboards for them are so inexpensive.
This is actually relevant to the OP because the biggest bang for the buck in capturing wasted energy in modern electric cars like the Tesla is the inability to do full regenerative braking in the winter when the battery is too cold to receive the full charge rate. When the temperature is low regen braking in the Tesla is limited (ranging from almost nothing up to the full 60kW) based on how cold the battery is. The car actually makes strategic decisions about when to spend power to *heat* the battery because the energy put into warming the (large) battery mass will at some point be more than outweighed by the gains in regen braking recouped energy.
Since the regenerative braking cannot dump energy into the battery when it is cold, why can't it dump that power into the battery heater? Is the maximum heater power too small?
No worries. We will get there soon enough by slices:
"The Massachusetts court said the Second Amendment protections did not apply to stun guns because, among other reasons, they were “thoroughly modern” inventions that were not in common use at the time the Second Amendment was enacted in 1789."
our social and economic peers control hand guns far better, and are not cesspools of rape, murder, and robbery.
you get trained, tested, THEN you get a gun. and we will cut down on the USA's absolutely insane sky high homicide rate compared to our social and economic peers
And then you are left to explain why homicides in the US are proportionally high for all weapons including knives, fists, and rocks. Or are you suggesting that stronger gun control laws will reduce crimes involving these weapons as well?
I suspect the laser light scattered by the hood would just blind the driver anyway. One way or another, the chase would end.
The driver, passengers, and bystanders would be at risk of eye damage. People who work around unshielded hi power lasers wear eye protection to protect against reflections.
Affix one of these to a police helicopter and that will be the end of police chases. Pinpointing the hood of fleeing vehicle for take out will be trivial.
And when the driver, passengers, and bystanders have their retinas damaged from the reflections, they can take pride in ownership of the law enforcement agency responsible. Or not since law enforcement has qualified immunity but permanently blinding citizens sure looks bad in the news.
Regardless, a movie about Starship Troopers that doesn't include power armor isn't a proper re-telling of the story.
I remember that this was addressed in a making-of documentary. At the time CGI was too expensive to include both bugs and powered battle armor and there was even less of a story without bugs.
I am aware of the IEC's revision and believe it will lead to further confusion. Simply regarding bits, bytes, words, and whatnot as non-SI units with special meanings for k, M, and G would have been enough. It only got confusing with telecommunication standards requiring conversion.
If I were a vendor, even one who really wanted to be cooperative, I'd balk at that, because the chances of something like a backdoor being discovered are too high. It would be actively sabotaging my customers, and not just to the NSA.
That did not stop RSA from including NSA's compromised random number generator and making it the default selection. Maybe their alternatives included a secret court order, NSL, or being paid 10 million dollars.
Or after they fail to get a warrant or do not even bother, they ask you to come down to the station to make a statement and if you decline, arrest you for purposes of a custodial interrogation (maybe as a material witness) which is just for the reason of acquiring your DNA anyway.
This will be just another reason never to cooperate with law enforcement as if another was needed.
the DNA test was no different than lifting a fingerprint left by someone. The did not force him to take a DNA test, rather he left it behind and thus no warrant is needed.
Which is exactly the problem. Previously a warrant was required and in this case they could or did not get one but now they can get DNA without a warrant though an interrogation. You might be able to not touch anything and avoid leaving a fingerprint but not shedding DNA is not going to happen.
The response when this becomes common will less cooperation with law enforcement in order to avoid the DNA trap. Is that an improvement?
Slashdot Mirror
Doesn't the I4, Pentium G, and Celeron support of ECC also depend on the motherboard chipset enabling ECC despite the memory controller being in the CPU?
The problem with the software only test is that it does not verify the operating margin in timing, voltage, and temperature. If the motherboard supports it, then raising the memory operating frequency by say 10% and lowering the DRAM operating voltage by say 10% and *then* running the software only test like memtest86 or maybe the Prime95 stress test should work to detect marginal DRAM.
ECC errors do not have to halt the machine. They can just be reported.
Adding the extra 8 bits per 64 bit line would always raise the price 12.5% although that could be insignificant. There are also some boot time issues because memory has to be initialized which takes time and adds complexity.
I am inclined to blame Intel as far as why ECC is not more common since they use this feature for market segmentation.
For a while now 4 bit chipkill has been supported as well which I think takes 144,128.
It would generate a report listing the error and may or may not halt the machine depending on how that is set.
Reporting on the event or halting the machine upon detection of a double bit error *is* better than missing it completely and some triple bit errors would be detected as well. If chipkill ECC was being used which is commonly available, then up to 4 bits within a nibble boundary would be detected and corrected.
AMD has their socket AM1 processors which support ECC memory and encryption but lack the built in ethernet which may not be a big loss since the processors and motherboards for them are so inexpensive.
A laptop is competitive with a desktop right up until the time it fails because of marginal cooling. Then it becomes competitive with a brick.
Isn't this part of FCC type acceptance? That is the excuse I have heard from the laptop makers.
Since the regenerative braking cannot dump energy into the battery when it is cold, why can't it dump that power into the battery heater? Is the maximum heater power too small?
No worries. We will get there soon enough by slices:
"The Massachusetts court said the Second Amendment protections did not apply to stun guns because, among other reasons, they were “thoroughly modern” inventions that were not in common use at the time the Second Amendment was enacted in 1789."
http://www.bostonglobe.com/met...
And then you are left to explain why homicides in the US are proportionally high for all weapons including knives, fists, and rocks. Or are you suggesting that stronger gun control laws will reduce crimes involving these weapons as well?
Laws which cannot be universally enforced may be selectively enforced replacing the rule of law with the rule of men so they are still useful.
That thing which goes up.
The driver, passengers, and bystanders would be at risk of eye damage. People who work around unshielded hi power lasers wear eye protection to protect against reflections.
And when the driver, passengers, and bystanders have their retinas damaged from the reflections, they can take pride in ownership of the law enforcement agency responsible. Or not since law enforcement has qualified immunity but permanently blinding citizens sure looks bad in the news.
If the government put the company out of business then there would be no future revenue, err, I mean fines.
So Windows 8 was about enforcing tablet usage onto desktop computers and Windows 10 will do the same for phones?
I remember that this was addressed in a making-of documentary. At the time CGI was too expensive to include both bugs and powered battle armor and there was even less of a story without bugs.
I am aware of the IEC's revision and believe it will lead to further confusion. Simply regarding bits, bytes, words, and whatnot as non-SI units with special meanings for k, M, and G would have been enough. It only got confusing with telecommunication standards requiring conversion.
IEC is not JEDEC and JEDEC does not explicitly support the IEC definitions.
When they start using metric prefixes in IC part numbers and organization, then I will reconsider.
That did not stop RSA from including NSA's compromised random number generator and making it the default selection. Maybe their alternatives included a secret court order, NSL, or being paid 10 million dollars.
I agree that it would be one hell of a risk.
Or after they fail to get a warrant or do not even bother, they ask you to come down to the station to make a statement and if you decline, arrest you for purposes of a custodial interrogation (maybe as a material witness) which is just for the reason of acquiring your DNA anyway.
This will be just another reason never to cooperate with law enforcement as if another was needed.
Which is exactly the problem. Previously a warrant was required and in this case they could or did not get one but now they can get DNA without a warrant though an interrogation. You might be able to not touch anything and avoid leaving a fingerprint but not shedding DNA is not going to happen.
The response when this becomes common will less cooperation with law enforcement in order to avoid the DNA trap. Is that an improvement?