Given the graphic on the top a chip with 8 GByte at 77mm^2 I have no idea where they're getting the "Terabyte on a chip" thing. Unless the mean a Terabyte on a 200 mm die?
Crossbar Resistive RAM stores a terabyte on a chip
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Re: Crossbar Resistive RAM stores a terabyte on a chip
#22This article makes a lot of extraordinary claims. Extraordinary claims require extraordinary evidence. In this case, that means a reputable tech reporter from a reputable publication has to say "this is the real deal" before these guys can be taken seriously. (I'm not doubting that they have any tech, it's just that they seem to be promising something with no downsides, which in most cases means a marketing team has…
"This article makes a lot of extraordinary claims. Extraordinary claims require extraordinary evidence." Does it? It just sounds like a normal memristor to me.
Memristor does not seem to be normal neither. Is there any on the market?
Re: Crossbar Resistive RAM stores a terabyte on a chip
#23Earlier quoted context omitted.
As I understand it, one of the (more interesting) characteristics of memristors is that they can do computation. They don't mention anything like that here, so I doubt it.
Memristor do no computation at all. It follows the same idea as the described RRAM. High density, low cost, persistent, low power consumption, high write/read throughput, low latency. To the exception that it could even replace RAM, not only nand devices. I don't remember of the top of my head reading performance but it was clearly closer to RAM levels.
"Another possible application of memristors is logic circuits. Memristors can be used in hybrid CMOS-memristor circuits, or as a standalone logic gate. One notable logic application is using memristors in an FPGA, as configurable switches, connecting the CMOS logic gates."
http://www.ece.rochester.edu/users/friedman/papers/ChipEx_11...
Re: Crossbar Resistive RAM stores a terabyte on a chip
#24I remember memristers were supposed to do something like this. Anyone have an idea if this is related or unrelated. http://en.wikipedia.org/wiki/Memristor
As I understand it, one of the (more interesting) characteristics of memristors is that they can do computation. They don't mention anything like that here, so I doubt it.
A memristor can do computation, but you don't have to do computation.
Like like a regular transistor can be used for computation or ram.
Re: Crossbar Resistive RAM stores a terabyte on a chip
#25Crossbar believes it can write data to its chip at 140 megabytes per second, compared to 7 megabytes a second for flash. Read performance is 17 megabytes per second, with a random read latency of 30 nanoseconds. The write performance sounds good, but the read performance seems very low. Also I don't know where they get 7 megs per second for flash. Sounds like the picked the worst performer to compare to. I'd be more…
The numbers are fairly suspicious, they don't reference the density of the flash they are benchmarking or if they are behind controllers. Flash chips are generally multiplexed and behind a smart controller that compresses and and caches data, which can greatly effect the throughput numbers.
Lots of other stuff to know -- what's the BER (bit error rate), what's the programming model (page erase, like flash)? How many simultaneous reads can you push through? Writes? Can you halt an ongoing operation or change it mid-stream?
Re: Crossbar Resistive RAM stores a terabyte on a chip
#26Given the graphic on the top a chip with 8 GByte at 77mm^2 I have no idea where they're getting the "Terabyte on a chip" thing. Unless the mean a Terabyte on a 200 mm die ?
They probably mean TB for the whole device, and each chip is smaller. This could also be a picture of an earlier model.
Re: Crossbar Resistive RAM stores a terabyte on a chip
#27> It can access that data 20 times faster than the best breed of flash memory > could also perform its storage functions at 20 times lower power > non-volatile > 10 times the endurance of NAND flash chips that it could replace If this is true, wow, but I have a hard time believing it.
They haven't mentioned the price or may be I missed it. That may be the important factor.
The price of a chip is more or less the die size. And they clearly show a smaller die than existing technology.
Re: Crossbar Resistive RAM stores a terabyte on a chip
#28Given the graphic on the top a chip with 8 GByte at 77mm^2 I have no idea where they're getting the "Terabyte on a chip" thing. Unless the mean a Terabyte on a 200 mm die ?
FTA: "The company can put a terabyte of data, or about 250 hours of high-definition movies, on a single chip that is smaller than the equivalent flash memory chip (as pictured at top)."
Re: Crossbar Resistive RAM stores a terabyte on a chip
#29Earlier quoted context omitted.
They haven't mentioned the price or may be I missed it. That may be the important factor.
The price of a chip is more or less the die size. And they clearly show a smaller die than existing technology.
Since when is the price of a chip in any way related to the size of its die?
Re: Crossbar Resistive RAM stores a terabyte on a chip
#30Earlier quoted context omitted.
The price of a chip is more or less the die size. And they clearly show a smaller die than existing technology.
Since when is the price of a chip in any way related to the size of its die?
It's always been related, but it's not the only factor. Packaging, assembly and test are the other primary components of manufacturing cost. You are correct though, that price (as opposed to cost) is going to include amortized R&D, marketing, license fees, margin etc.