How long until these are shoved in PDAs? They seem to be not too far off the adjusted price of the 64meg MMC specified as a special order in my SL45 over seven years ago. and could fill or shift its content in well under a second.
From Inq -
SAMSUNG HAS released a new generation of solid state disks that uses native SATA-IIinterface for fastest possible transfer speed.
These new drives come in 1.8 and 2.5-inch formats, and feature 960 Mbps sequential read and 800 Mbps sequential write speed respectively, corresponding to speeds of 120MB/s and 100MB/s.
Using the latest generation of NAND chips, Samsung almost doubled the speed of its current line-up, which we got a chance to review last weekend (separate article coming right up).
1.8-inch model weighs only 40g, while the power consumption of both is rated at just 0.7W..
This is the very first SSD that not just rivals, but surpasses conventional HDD's in speed, and in the case of 1.8-inch subnotebook market - matches capacity as well.
http://www.theinquirer.net/gb/inquirer/news/2007/11/05/samsung-launches-ultra-fast-ssd
I have been using my Archos 101 tablet for a few months now, I quite like it, and have tried a few of the different android builds available to download. I am keen to try and upgrade the ram, as 256MB is not alot. This is the progress I have made so far, I hope that maybe other people can add to it. First step is to find a suitable ram module that has the same pinouts, and specs, but with larger capacity. The ram module is marked "OVA18 D9LBZ". Using Microns FBGA decoder We find that the full part number of the ram module is "MT46H64M32LFMA-6 IT:A". If we go to microns list of available low power DDR modules we can see that there are available a 512MB and a 1GB version. (note that they are listed in megabits, not megabytes, so the original 256 megabyte module is a "2gb" size, 512MB is "4gb" and 1GB is "8gb")
I am in the UK, and havent yet found a uk supplier, but I found the 1GB module available in the US for about 50 US dollars.
I dont know what the max ram limit of the cpu is, I have read somewhere that the OMAP3630 cpu can support max 1GB, but cant remember where.
Im my mind there are two further problems once the chip has been bought:
1. physically removing the old ram module and fitting the new one. my plan is to setup a spring with one end glued/fixed somehow to the top of the old ram module, and then put the mainboard in the oven, and once the solder melts the spring will pull the ram chip off. Or it might pull the ram chip and the cpu at the same time. Then put tiny bits of solder on all the pins of the new ram module, align it ontop of the cpu, maybe under slight pressure, and put it back in the oven and hope that all of the solder joints connect properly. Quite a few of the pins are not used, so we can get away with 1 or 2 pins not connected. One concern I have is that in the spec sheet alot of the pins are labelled NC for not connected, but several have DNU which I take to mean "do not use". If these end up connected aswell then will this work or not. Another idea is instead of soldering the new chip on, we could polish the pins on the cpu really smooth and also polish the pins on the ram chip, and build a clip/holder type device, it might be possible to run the system with the ram chip just held under pressure on the cpu. We would need to stop the chip moving sideways also.
2. There may be a firmware issue with the new ram module, the system may not recognize the ram chip at all, or only address 256MB of it, because that is what its expecting to be there. I have seen a tutorial on upgrading the ram on an xbox and this is the problem they had, the new ram runs fine but only the original amount that was installed can be used without significant software changes. Hopefully archos have not made it too difficult for us.
These are my thoughts so far, I hope we can make some progress, or at least work out why it cant be done before destroying any hardware. I have links to the FBGA decoder, microns list of lp ddr chips, and the supplier of the 1GB chip, but as this is my first post I am not allowed to post links yet! PM me and I will send you the links.
Hi! Scholbert is good in this staff ask him . Bye
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To be able to support bigger memory both memory controller of OMAP and pcb itself MUST have additional address lines. I almost sure that OMAP has at least 512MB support but not sure if Archos did preparation for bigger memory chip on board.
Also replacing of memory BGA chip not so simple and may cost more than new tablet
I am hoping that the larger memory chips still use the same interface, and therefore the same pin layout as the 256MB chip, as the link for the datasheet for 512MB and 1GB modules is the same as for the 256MB chip. So I dont think any additional data lines are needed.
Yes im sure your right, buying a later tablet will have larger ram module as standard, but I just like to tinker with things
Wikipedia list a few phones that use the omap 3630 cpu, and therefore probably use a ram module soldered ontop as in the archos. The motorola cliq 2 has 512MB of ram, as does the palm pre 2, the nokia n9 has 1GB ram but is a fairly new phone and still expensive to buy. I am going to looking out for a damaged mobile (cracked screen etc) and hope that the ram module is intact.
PPCtech did such an upgrade for the venerable HP hx4700, for $130 including material and shipment.
You'll need rework equipment (special kind of heat gun, not that expensive ($60 is the cheapest)), in an oven you'll probably kill components that were added later on (audio jack etc) and can't stand heat.
If you have the right equipment, it's not that hard to do. You'll heat the RAM chip till you can gently pull it off. Then you'll clean the PCB of solder residue. Next you put on solder paste using a BGA screen made for the chip you want to use.
Then you put the new RAM ic in the correct position (using a microscope to align it correctly), and locally heat it using the heat gun.
Then you pray it worked, or retry (best with a new RAM chip, but they can stand quite some heat, so reusing should be possible).
Problem is that you don't know for sure it could work, thus it's unclear if the error was in the soldering or in the firmware....
Sweet project! Any updates?
I've read conflicting information about this, but I was wondering, what type of architecture does the Processor(s) in the Nexus 10 use?
Most places list it as dual-core, which I'm assuming just means 2 cores on 1 chip. Some places and people mention 2 separate CPU's (as in, 2 separate A15 cores)
Which is it? For some reason I kind of like the way 2 separate cores sounds...
It is a Samsung Exynos 5 5250, which is a dual-core A15.
Two cores, one chip.
Here's a link to the ARM Cortex-A15 Wiki page.
http://en.wikipedia.org/wiki/ARM_Cortex-A15_MPCore
Like OnePlus 5
is the 8GB version = 4GB + 4GB of RAM ? or Single 8GB ?
and 6GB version, is it 2GB + 4GB ? or single 6GB ?
the qualcomm 835 page does not tell any useful-related info to this question
neither OnePlus 5 specs page
they only show:
Memory Speed
1866MHz
Memory Type
Dual-Channel
LPDDR4x
I don't understand your question... it has 6GB or 8GB of RAM, what difference does it make if it's two 4GB chips or 8GB (or four 2GB chips), or a 2GB and 4GB or a single 6GB chip (or three 2GB chips)? If you are referring to the "dual-channel" thing, then you should look into what that technology is, but it could easily be implemented in a single chip if it was specifically designed for that. Mobiles rarely use "off the shelf" components and are chips are often specifically designed for applications as needed.
This is pretty much off topic for this area anyway, probably more appropriate to ask in the OnePlus 5 group.
Hi!
Having dug my old Google Nexus 7 2012 out of storage and found it both working and happy in terms of battery lifetime I let my mind wander towards fixing what I consider the main flaw with the device: Its 1 GB of system RAM.
Now, I have my fair share of microsoldering and idle work in BGA soldering and the like but my software hardware is far more lacking. I already know that the Nexus I have holds 4 x Hynix 2Gb HTC2G83CFR DDR3L RAM and the datasheets for it these are fortunately available, I also know that the Tegra T30L chipset supports up to 2GB of RAM. The closest I've been able to scrape together sofar are Hynix 4Gb H5TC4G43MFR but these use 78ball FBGA and 96ball FBGA, but atleast I'm on the right track in finding older chips...
This is where I run into the software knowledge lack; Simply finding fitting chips to replace the old ones and successfully soldering those on will not neccesarily just work out of the box? Depending on the kernel it might detect and make use of the new chips but it might also not.
Am I right in assuming that there will be a need for software side hacking to accomodate the upgrade?
On a sidenote I also found Daniel Sauvageau's musings on doing the exact same thing back in 2016 but there are no follow-ups to it. He does raise a concerning potential roadblock in his article on the matter:
"Find out, preferably in a non-destructive way, whether A15 is actually routed from the SoC to the DRAM BGAs. Without A15, I would need DDR3L DRAM that has 2KB pages instead of the typical 1KB ones found in all eight-bit-wide chips I have looked at. If neither are possible, then this idea is as good as dead"
Click to expand...
Click to collapse
Any thoughts, ideas or inputs are welcome!
(Yes, I am aware that this is neither particularly economical nor for the faint of heart lacking a decent way to reball BGA)