Questions tagged [memory]

RAM (random access memory), either RAM hardware or software and operating system use of RAM.

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How would I go about the write port of a set-associative cache memory? [closed]

Let's consider a four-way set-associative cache, just like this one: [ figure 5.18 from Computer Organization and Design (David A. Patterson and John L. Hennessy), section 5.4. As you can see this ...
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Brand new Laptop With a few different problems

Not even sure where to start; Computer specs: Screen Size: 15.6 inches Max Screen Resolution: 1920 x 1080 pixels Processor: 3.8 GHz Intel Core i7 RAM: 16 GB Hard Drive: 256 GB Flash Memory ...
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How is ROM able to access the CPU without an interface? [duplicate]

Most memory controllers are built into the microprocessor, only for RAM. Therefor if the chip used to decode physical addresses and send them to the right component is only connected to RAM, how does ...
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20 views

Black screen after new RAM installed

I used the online crucial tool to pick correct RAM for my computer, and when it arrived I installed it but I get a blank screen, no beeps and no light on my power button, fans are running. Any ideas, ...
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Trying to understand random access write versus sequential access writes

Say I create the text file on my Linux (or Windows) system, put some content and saved it. Will OS write it as random access writes (RW) or sequential access writes (SW). I understand the concept of ...
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Do Windows memory optimizers actually work (on Windows 10)? [duplicate]

Note: this is not an opinion based question, and I do not want any opinion based answers. Microsoft have had long enough by now to optimize Windows, build in garbage collectors, etc Does anyone know ...
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1answer
62 views

Resuscitating motherboard

I have a strange problem going on. I received a not working PC to fix and I'm trying to revive it. I'm close to trash away everything but before to do that I wonder if somebody can give me some hints. ...
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Why does HTOP show bigger usage than defined in cgroup 'memory.limit_in_bytes' parameter?

I have defined the memory limit parameter in self-created cgroup test-group: $ cat /sys/fs/cgroup/memory/test-group/memory.limit_in_bytes 15998976 After it, I'm executing the Python builtin ...
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Blue Screen of Death Chrome 2019? two screens

I am getting a BSOD with Windows 10 while using Youtube on Chrome on one screen and playing highly resource-demanding videogames on the other. Yesterday I think got a System Service Exception Today I ...
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Using cache-as-ram techniques to test memory without crashing the system?

I'm working with some x86 CPU's with ECC RAM. We have some memory testing code that can test the memory and check the relevant Machine Check registers for corrected ECC errors. Using the ECC ...
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Do 32 bit applications take advantage of >4GB of memory? [duplicate]

As a general rule, does an application written and assembled on a machine which handles 32bit wide instructions, see any benefit from memory addresses after the first 4GB? Suppose a 32bit application ...
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3answers
902 views

H310M PRO-VDH PLUS MOTHERBOARD AND i5-9400F won't turn on

I built a PC with the following parts: MSI H310M PRO-VDH PLUS i5 LGA1151 i5-9400F 2.9 GHz 8GB Kingston DDR4 2400MHz CL15 HyperX Fury Satellite Pro-460 - 400w there's no video after assembly. ...
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Enormously large in-use dentry cache

We have an EC2 instance that has a very large (50+GB) dentry cache and most of it is in use (99%). "drop_cache" commands (sysctl -w vm.drop_caches=2 or sysctl -w vm.drop_caches=3) don't help much, ...
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290 views

Extreamly high memory usage in windows 10, and no clue as to why

Hello and thanks for your attention. The problem: For approximately one week my work computer's memory usage has spiked to very high level, to the point that it has almost became impossible for me ...
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Windows 7 won't sleep after high RAM usage

Windows 7 won't sleep after high or max RAM usage Steps that lead to problem: Use RAM heavy program(s) (in my case: Blender 2.8, Chrome) that maxes out my RAM Let the RAM usage drop back to normal ...
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Yocto meta-toolchain-qt5 qtwidget raspberry pi zero compile Error

I got following error while i compile yocto bitbake meta-toolchain-qt5, the error related with qtwebkit. My target machine is raspberry pi zero armv6 hf. Here my host PC: OS Linux Ubuntu 16.04, CPU ...
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Free Space Not showing up [duplicate]

When I select all files and folders in C together and check on properties the size shown is much less than the size occupied on drive on homepage. Why is this ? Is there anyway to recover that lost ...
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109 views

PC not starting with ram installed - it is stuck in a turn-on, turn-off loop

-CPU installed -NO sticks of memory (RAM) -NO hard disks / storage devices -NO peripheral cards on (PCI-E/PCI/AGP/etc) Literally just CPU and motherboard connected to the PSU Turns on, runs fine/...
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844 views

Can ReadyBoost be enabled on a machine with an SSD in Windows 10?

Upon inserting many flash drives and selecting 'ReadyBoost' under Properties, I am greeted by the message, "This device cannot be used for ReadyBoost. ReadyBoost is not enabled because this computer ...
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32 views

move Free Space Between two devices ubuntu

i have in the computer two disks/devices one of the disk is full , but it only have 250 GB the other device have plenty of free space more then 1 tb i want to move memory between the devices , i tried ...
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Why is a traditional RAMDisk faster than a GPU RAMDisk?

I tried out the GPURamDrive software by prsyahmi on GitHub and I created a 5 GB RAM Drive using my nVidia RTX 2060's GDDR6 RAM. I also later created a 4 GB RAM Drive using AMD's Radeon RamDisk ...
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GTAV PC Settings

So, something's probably wrong with the GTAV settings. the little bar at the top of the graphics settings says im only using 2500 mb of my 8000, yet my average fps offline is like 40 and online is 30, ...
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1answer
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Oracle VirtualBox Manager settings change after doing “vagrant up”

I changed memory and processor settings in Oracle VirtualBox Manager but when I do vagrant up to activate my environment, the settings change back to default. I made sure to power off the virtual box ...
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After instaling new DDR 3 4 GB ram bios shows the ram but loading windows stucks at the boot logo

This is my first questiin on this site. I will try to explain it clear as possible. I got a SK Hynix DDR3 4GB 1Rx8 ram. (PC3 - 12800U - 11) Model number - HMT451U6BFR8C - PB N0 AA Proccessor - ...
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Why do we need PHY Interface between DDR Controller and DRAM Memory?

Is it required to have PHY in all the systems, if not what happens ? if PHY is removed can we still pull the data from DRAM memory using the DDR controller ? if yes, then why do we need to have PHY ...
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RAM not detected duble boot Windows 10 and Ubuntu 18.04

I have an Asus X456U with dual boot, Windows 10 and Ubuntu 18.04. One day I removed the RAM installed in order to check it. Since then, whenever I turn off my notebook for more than 30 minutes and ...
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30 views

Removable memory module sometimes doesn't show in Windows but does in CPU-Z

I have an Asus Zenbook Pro UX501VW laptop which is having a weird problem with memory. The laptop has 8GB soldered to the motherboard, and another 8GB removable SODIMM. This worked fine for years up ...
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50 views

Computer is steady on high memory usage not showing what takes up the memory

Windows 10 here, I have 8GB on my machine. Clearly, task manager thinks otherwise (about 1600MB acounts for 70%. that's wrong). When looking at computer's properties, i do see 8GB. Where do I find ...
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1answer
282 views

Asus TUF FX504GD has 4 memory slots instead of 2

I have purchased an ASUS FX504GD and based on task amnager and cpu-z there are 4 slots available. I also own a HP and over there it shows clearly 2 slots available. On their official site says 2 slots ...
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How much different shape from two RAM at different speed?

I was looking two rams both are identical specification except "speed". For example, I saw Samsung 1066mhz and Samsung 1333mhz look like totally identical except stickers. I couldn't find any tiny ...
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What Instructions does a CPU give to DMA?

I understood on a very high level that CPU instructs DMA to fetch data from Hard Disk and load it in RAM. Even though I am a .Net Developer and I don't need any of this in my daily job but still I ...
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Custom built PC no video and no beep

I have this built PC since 2014, but i didn't use it at all since 2017 because I've moved to another city and couldn't bring it with me. Lately I've been trying to power it up to no avail, it powers ...
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241 views

Very high memory usage on Windows 10 but programs don't add up

I generally get a memory usage >80% but when I check the Task Manager, none of the programs add up to that usage. The laptop (Dell XPS 13 9360) frequently has to resort to my SSD with a large number ...
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Frame rate problems

I've been looking into this for quite a while but the only thing I can come up with is that I am missing something. I have an intel i7-3770 @3.40ghz, 16gb RAM, 250gb mechanical and 750gb SSD, a ...
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Can I use this ram (PHOTO) with this motherboard “GIGABYTE GA-F2A88XM-D3H”

Can I use this ram (PHOTO) with this motherboard GIGABYTE GA-F2A88XM-D3H? 8GB PC3-12800R (DDR3-1600Mhz, 2RX4) hynix - p/n: 647651-571
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1answer
380 views

ASUS X555LJ RAM Upgrade (8 GB -> 12 GB)

I have an ASUS X555LJ laptop with 4 GB of RAM on board and 4 GB of RAM removable, both of them DDR3L SODIMM 1600. ASUS suggested me to replace the 4 GB removable one with a bank of 8 GB after I asked ...
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Virtual Machine client slow and crashing

Admittedly I am working VirtualBox quite hard with this idea. I have a 32 Intel core (64 HT core), 128 GB workstation running CentOS 7. I am looking to run Windows in virtual machines, ideally in 16 ...
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1answer
25 views

very high ram usage in google cloud VM (linux)

I am running a virtual machine on google cloud platform with 20 cpu cores and 256gb of ram. As soon as i boot the machine, all the ram gets filled up (this always happens no matter how much ram or cpu ...
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1answer
325 views

Rstudio desktop and R desktop memory allocation

I am very new to machine learning (caret) and I am having trouble with RAM allocation in RStudio, but not R. I am trying to run a Random forest model using cross validation. After preparing my train ...
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1answer
337 views

PM2 god daemon exists (Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory)

I've updated pm2 from 2.10.1 to 3.5.1. The god daemon process gets high memory usage comparing with the old version. Also about 15 minutes after start the pm2 suddenly kills with the following error. ...
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Recover Data from an eMMC on a Device with Bad Memory

I just lost a laptop to bad RAM. I don't have anything I need to recover from it and I've already disposed of it, so for me this is just a hypothetical question. When recovering data on a device with ...
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42 views

Half of the 8GB RAM sometimes “missing”, sometimes not

I've got 8GB installed on my ASUS Windows 7 laptop. Recently, there have been times when I've noticed the computer slowing down, and when I open the task manager I see only 4GB maximum on physical ...
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Is this samsung memory ECC or not

i have question about memory name, everywhere in shops, i could find module like this: https://www.amazon.com/Samsung-1866MHzCL13-RegECC-Internal-M393B2G70DB0-CMA/dp/B00T3CJ6OW You could see in name "...
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Does ECC RAM with a Coffee Lake CPU need specific motherboard support?

I'm preparing to build a new computer, and I'd like to use ECC RAM if possible. In the past, that required a motherboard with ECC support, but these days it's unclear whether that's still true. The ...
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1answer
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Checking RAM slots on Windows-10: Discrepancy between wmic and Crucial scanner

I am trying to find RAM configuration for my Ideapad 520s (80X200EPIN). wmic shows 2 memory devices with capacity of 32GB: C:\Users\joshi>wmic memphysical get MaxCapacity, MemoryDevices ...
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92 views

Are there compatibility difference between dual-rank and single-rank memory modules?

I have a laptop with a single stick of RAM, with one slot free. Here are the specs of the existing RAM stick: SODIMM DDR4 2400, Single Rank, None-Ecc. I was thinking of the Crucial CT8G4SFS824A. ...
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1answer
65 views

Computer used to work with 16Gb of memory, now only works with 8Gb

I have a rather puzzling problem, my computer used to just work for many years but now it refuses to even pass POST. Trying to narrow down the problem, I figured out that by removing two memory ...
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30 views

What/Where should I look for in trying to rent a server for high-memory computational needs? [closed]

I am in the process of parsing machine-readable data from wiktionary into a SQL database using wikokit, but have since realized that, according to the time estimate provided by wikokit, it will take a ...
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850 views

What does 9.2R mean in the context of RAM memories?

I see engraved in memory slots values such as 1.5V and 9.2R. I understand that 1.5V refers to voltage, but what does 9.2R refer to?
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245 views

FFmpeg Decklink input buffer overrun and memory issues

I want to use FFmpeg to record two (three in the future) video sources at the same time and save them into two different files. I tried using this command ffmpeg -raw_format rgb10 -f decklink -i '...