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Memory question
Hi,
I have a new quadcore Acer Aspire E 15 that has upgraded itself to Win10. I purchased it with 4 GB RAM installed. MS Task Manager says of the Memory, Speed: 1333 MHz, Slots used: 1 of 2, Form factor: SODIMM, Hardware reserved: 117 MB. I presume 117 MB is reserved for video. Unfortunately, Acer did not provide a RAM access port. The slots are on the MB and the laptop needs total dis-assembly to access the MB. I use Oracle VirtualBox a lot and with one VM open my total Memory In use is like now, 3.1 GB. Comments and guidance requested. What is the cost of memory? Do the benefits of Memory upgrade justify the labor and hassle of total dis-assembly? Thanks. |
#2
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Memory question
On 11/4/2015 9:40 PM, Norm X wrote:
Hi, I have a new quadcore Acer Aspire E 15 that has upgraded itself to Win10. I purchased it with 4 GB RAM installed. MS Task Manager says of the Memory, Speed: 1333 MHz, Slots used: 1 of 2, Form factor: SODIMM, Hardware reserved: 117 MB. I presume 117 MB is reserved for video. Unfortunately, Acer did not provide a RAM access port. The slots are on the MB and the laptop needs total dis-assembly to access the MB. I use Oracle VirtualBox a lot and with one VM open my total Memory In use is like now, 3.1 GB. Comments and guidance requested. What is the cost of memory? Do the benefits of Memory upgrade justify the labor and hassle of total dis-assembly? Thanks. Adding RAM doesn't look like it's too difficult if you take your time. I was nervous the first few times I opened up laptops, I was careful to make a drawing so I knew where each screw went... buying the right screwdriver set is recommended, if you decide to u/g. https://www.youtube.com/watch?v=Lfwlj6FMQ9I |
#3
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Memory question
Norm X wrote:
Hi, I have a new quadcore Acer Aspire E 15 that has upgraded itself to Win10. I purchased it with 4 GB RAM installed. MS Task Manager says of the Memory, Speed: 1333 MHz, Slots used: 1 of 2, Form factor: SODIMM, Hardware reserved: 117 MB. I presume 117 MB is reserved for video. Unfortunately, Acer did not provide a RAM access port. The slots are on the MB and the laptop needs total dis-assembly to access the MB. I use Oracle VirtualBox a lot and with one VM open my total Memory In use is like now, 3.1 GB. Comments and guidance requested. What is the cost of memory? Do the benefits of Memory upgrade justify the labor and hassle of total dis-assembly? Thanks. First check the specification of the computer. Even if there were an empty memory slot, you cannot use it if you already maxed out the total memory capacity of the mobo. I've even seen where the mobo had the foils to solder a memory connector but there wasn't a connector there. Check what the specs say is max memory for that model. You might already be at the max. You said "Acer Aspire E 15". That does not specify which model. Their http://us.acer.com/ac/en/US/content/series/aspire-e web page shows 4 models. Clicking on the More link shows 18 models. One of the models lists 12 GB for memory; however, that does not mean all their models can take that much RAM (no connector, not enough address lines). Their cheapest model (http://us.acer.com/ac/en/US/content/model/NX.MRWAA.014) says: standard memory = 4 GB, maximum memory = 8 GB. So you likely can go up to 8 GB on whatever model you have. https://www.youtube.com/watch?v=YuKmm-dmFGY That shows disassembly to replace the HDD and RAM. After taking out the umpteen screws from the backplate, you have to pry apart the tangs holding the keyboard from the backplate. Be careful. The video shows the HDD is easy to get at (once you get the keyboard out of the way): timemark 1:30. Everything after timemark 1:47 to 2:25 is getting at the memory. Note the video is sped up quite a bit at places. Note that is only *ONE* memory slot. You'll have to replace your old SO-DIMM memory module with a new and bigger one. Then you'll have to figure out what to do with the old one. Someone on Craigslist or Ebay might want it. Make sure you put in the right type of memory. The guy in the video had PC3L (lower voltage), not PC3. There are online memory vendors that provide a lookup service, like: http://www.corsair.com/en-us/memory-finder http://www.crucial.com/ http://www.tigerdirect.com/sectors/c...ory-finder.asp http://www.kingston.com/us/memory/upgrades Don't try to search on "Aspire E 15". Search on "Aspire model". If your model is ES1-512-25TP then search on "Aspire ES1-512-25TP". Crucial lists a PC3 module for that particular Aspire model. I don't know what model you have but then you can get that info and do your own online lookup. |
#4
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Memory question
Norm X wrote:
Hi, I have a new quadcore Acer Aspire E 15 that has upgraded itself to Win10. I purchased it with 4 GB RAM installed. MS Task Manager says of the Memory, Speed: 1333 MHz, Slots used: 1 of 2, Form factor: SODIMM, Hardware reserved: 117 MB. I presume 117 MB is reserved for video. Unfortunately, Acer did not provide a RAM access port. The slots are on the MB and the laptop needs total dis-assembly to access the MB. I use Oracle VirtualBox a lot and with one VM open my total Memory In use is like now, 3.1 GB. Comments and guidance requested. What is the cost of memory? Do the benefits of Memory upgrade justify the labor and hassle of total dis-assembly? Thanks. On some of these things, you can use the processor entry to determine the max RAM. Looks like it is 8GB total. Some Amazon advert said this was the processor in the machine. http://ark.intel.com/products/82103/...up-to-2_58-GHz Some general rules of thumb: 1) Under memory pressure, the OS can use as little as around 350MB. 2) When "fully inflated" the OS likes 1GB of RAM, on a small system. 3) Having 1GB for OS, and 1GB for applications, is a nice minimal size for a system. Such a choice means "less swapping". Tablets are sold with 1GB total RAM (and cannot be expanded) and for those, they're always under memory pressure. A 2GB sized system is a good place to start. 4) Once you've supplied 2GB for the host OS, you can use 2GB for a guest OS. That would include Win7/Win8/Win10. So one guest OS will be very very happy in your existing setup. 5) You could use a RAM expansion if planning on simulating a bunch of computers. I do that occasionally, but not as much as I used to. For example, I simulated video streaming between two VMs, just so I wouldn't have to set up physical computers to do it. The most VMs I've had running at one time is three of them, and one was operating with a trimmed supply of RAM. And I can also comment on how much is too much RAM. The test machine has 64GB, which cost $800. I probably should have stuck with the original 16GB setup, which cost $200. I have used all of the RAM, while running Microsoft ICE, and it took an entire week of computing (and some tricks), to keep that program running. I ended up using a 128GB pagefile, to "encourage" it to finish. This is the longest I've ever waited for any program to finish. Having a lot of RAM, tends to encourage you to attempt un-scalable projects. If you run 64GB of memory, the OS will swell up and use 6GB for itself (it doesn't stop at 1GB, as in (2) above). If a program uses mapfiletoRAM, the program will use 5-10GB before enough is enough (it's not clear whether that was an address space limit or something else). And loading and unloading mounds of RAM, is not that fast. While memtest86+ benches the RAM at 17GB/sec, the typical load and unload rates are just 1GB/sec in Windows. That means it takes a minute to "swell up" when running Microsoft ICE. So large amounts of RAM aren't all that scalable. The processor in my machine, just wasn't meant to run that amount of RAM in a sprightly fashion. Between 8GB and 16GB is the sweet spot, apparently. So if I was limited to 8GB, I think I'd be quite happy. (I have 8GB on the machine I'm typing this on :-) ) I would no longer be waiting for a minute, for some runaway program to "hit the top of RAM" like on the other machine that has the 64GB. The price of RAM must have come down, as this module is dirt cheap. 4GB for $22. DDR3L type (1.35V). So the disassembly time would be the most obnoxious part of the whole project (lots of tiny screws, some with custom length so don't put them in the wrong holes and so on). http://www.newegg.com/Product/Produc...82E16820148813 You can use CPUZ to attempt to read the SPD on the existing SODIMM, and try and match it. This is the ZIP version (might be portable, not sure). http://www.cpuid.com/downloads/cpu-z/cpu-z_1.74-en.zip I can't find the Acer Aspire E15 on crucial.com or on valueram.com, so I cannot verify the memory choice there. I'd probably want to match the CAS timing number just for fun. The SPD should have several timing tables, and the current operating speed (likely DDR3L-1333 or 667MHz) should tell you which timing table to use. CPUZ would likely use the 667MHz in its displayed information. Expect the battery life to be slightly shorter when the second SODIMM is installed. I suspect the second SODIMM slot is on the second channel of the dual channel RAM interface. So when that channel is powered up, there'll be a bit more power usage (a couple watts at most). The RAM chips are large enough now, that a 4GB DIMM can be constructed with just eight chips. So the SODIMM shouldn't be too squeezed for space. Happy disassembling, Paul |
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