Earlier quoted context omitted.
Duckhunt only works on a CRT with the original light gun. What are your priorities?
Not anymore: https://youtu.be/hfo004_4xwU
That is not the original light gun.
DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix
181–190 of 217 posts
Re: DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix
#182One thing I'd like to understand better about DDR5 is how well the built-in ECC is going to work to improve reliability. DDR5 comes with "chip level ECC" [1] of which the main purpose is to be able to better sell highly complicated memory chips with minor defects. But as a consequence as I understand, it will allow for the correction of single bit memory flips. With regular DDR4 or previous generations, you don't get…
I actually tried really hard to get RAM to corrupt a bit for a school project and didn't manage a single bit flip. How often have you actually heard of data corruption due to non-ECC memory? Either yourself, any degree of 'friend of a friend', or perhaps a study that looked into the matter with more success than I had. I don't mean a newspaper story because exceptional cases are reported because they're rare exceptio…
Re: DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix
#183Earlier quoted context omitted.
What I read around is that's not the enterprise ECC, it's more akin to ECC bits used in flash memory. It'll allow manufacturers to play fast and loose with memory.
I guess what I don't understand then is what big advantage "enterprise ECC" has left over this DDR5 "non-enterprise ECC". (Seriously, why is ECC "enterprise"? Everybody wins with memory error correction.) If regular DDR5 can correct single bitflips, it is on par in correction capabilities with "enterprise ECC" DDR4. Maybe this won't allow for the detection of multiple flips, and maybe won't even report single bit fli…
On SSD, we never receive each error corrected notification maybe because it causes too many errors everyday. I expect also DRAM may go such device.
Re: DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix
#184Hooray for FINALLY putting a local DC/DC converter ON THE DIMM so the motherboard can feed it with high-voltage/low-current power instead of low-voltage/high-current. The latter has become increasingly impractical (and noisy!)
Re: DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix
#185To my hardware colleagues on HN, what prevents something similar to Dennard Scaling on DRAMs? My very naive textbook knowledge is that every bit for DRAM uses up a single transistor and a capacitor, whereas a SRAM cell uses up 6 transistors. How is it then that with all the scaling so far that traditional SRAMs haven't caught up with DRAM capacities? A single DRAM chip is huge compared to the total die size of any mi…
> How is it then that with all the scaling so far that traditional SRAMs haven't caught up with DRAM capacities?
Leakage.
As FETs get smaller they leak more. CMOS Logic has dealt with this by having "dark silicon" -- yes, you get twice as many transistors as the last generation, but you can't use as many of them at the same time. You have to keep some of them turned off. But turning off SRAM means lost data, so "dark SRAM" is useless -- unlike, say a "dark vector unit" or "dark floating point unit".
DRAMs can optimize the entire process for just one job -- the 1T1C access gate -- to keep leakage at bay. Or if all else fails, just refresh more often, which hurts standby power but isn't a meaningful contributor to active-mode power.
Re: DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix
#186Earlier quoted context omitted.
It is pretty much the current greed driven technology. Company doesn't want to invest in proper FPGA technology that will allow reconfiguration of chipsets on the fly, but instead they want people to buy new chipsets every year or so and preferably make the old ones obsolete (not resellable)
AMD and Intel have released multiple DDR4 chipsets over there last 4~ years. The chipsets releases have hardly been related to RAM type support. Typically it's power or PCIe related, with Intel being the worst offender.
RAM support is on the CPU die. The chipset doesn't connect the CPU to RAM anymore and hasn't for a very long time.
Re: DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix
#187The unanswered question is, will it be cheaper? Price / GB of DRAM hasn't actually fallen much in the 10 years of progression.[1] LPDDR is still over $3/GB. UDIMM is still ~$3 /GB, which is about the same in 2010 / 2011. i.e Despite what you may heard about DRAM price collapse in 2019, the price floor of DRAM has been pretty much the same over the past 10 years. Every other silicon has gotten cheaper, NAND, ICs, just…
That chart is from https://thememoryguy.com/dram-prices-hit-historic-low/ and has some good commentary and other time scales.
Thanks, those are good charts
Re: DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix
#188Memory piggybacked on CPUs with TSVs when?
Re: DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix
#189Entirely different memory signal technology like serial transport won't adopted by DDRx memory?
Re: DDR5 Is Coming: First 64GB DDR5-4800 Modules from SK Hynix
#190Earlier quoted context omitted.
A number of Celerons 3XXX and 4XXX support ECC. They are intended for storage systems, like a NAS, or industrial electronics.
If you could point me to a The only thing that comes to mind in that category for me is the PC Engines APU2. The APU2 is a very neat piece of kit, don't get me wrong, but it being the only option is not great either.
Intel released the Xeon D series to fill this niche https://ark.intel.com/content/www/us/en/ark/products/series/...
The D-1529 can be TDP limited to 20W (at a whopping 1.3GHz), but if you goal is idle power consumption under 20w you are better off with one of the 35w TDP D-1602 since it is only a dual core and has the lowest standby consumption. The D-1518 is also a popular choice, and basically the same as the D-1529 but with a 35W tdp limit so it can turbo to 2.2GHz.
You can get a barebones motherboard (even mini-ITX is available for making small machines) for about $500 or a complete computer for a bit under $1000 ex https://www.newegg.com/supermicro-sys-e300-8d-intel-xeon-pro...
note - the xeon-d series is not socketed, so the motherboard price includes the CPU. Make sure to get board that takes full size DIMMS since there is not a lot of ECC laptop memory on the market.