WEBVTT 1 00:00:00.510 --> 00:00:01.950 In this section of the course, 2 00:00:01.950 --> 00:00:04.650 we're going to cover system memory known as RAM 3 00:00:04.650 --> 00:00:06.780 or random-access memory. 4 00:00:06.780 --> 00:00:09.480 Now RAM is used to load applications and files 5 00:00:09.480 --> 00:00:12.210 into a non-persistent and fast storage area 6 00:00:12.210 --> 00:00:14.310 so that the processor can rapidly access it 7 00:00:14.310 --> 00:00:15.510 when it needs it. 8 00:00:15.510 --> 00:00:17.700 RAM is one of the cheapest and fastest ways 9 00:00:17.700 --> 00:00:20.370 to increase the performance of your computer system. 10 00:00:20.370 --> 00:00:22.230 For a typical office workstation, 11 00:00:22.230 --> 00:00:24.720 you need at least eight gigabytes of RAM installed, 12 00:00:24.720 --> 00:00:26.460 whereas for a good gaming system, 13 00:00:26.460 --> 00:00:30.210 you're going to want 16 to 32 gigabytes of RAM or more. 14 00:00:30.210 --> 00:00:32.640 So, our focus in this section of the course 15 00:00:32.640 --> 00:00:35.490 is again going to be on domain three, hardware. 16 00:00:35.490 --> 00:00:36.960 As we go through this section, 17 00:00:36.960 --> 00:00:39.030 we're going to cover objective 3.2, 18 00:00:39.030 --> 00:00:40.710 which states that given a scenario, 19 00:00:40.710 --> 00:00:42.960 you must be able to install the appropriate RAM 20 00:00:42.960 --> 00:00:44.940 or random-access memory. 21 00:00:44.940 --> 00:00:47.670 Now as we begin this section, we're going to first take a look 22 00:00:47.670 --> 00:00:50.610 at how memory is addressed inside of the computer system, 23 00:00:50.610 --> 00:00:52.890 including the difference between how addressing occurs 24 00:00:52.890 --> 00:00:56.130 in 64-bit and 32-bit processors. 25 00:00:56.130 --> 00:00:58.140 Next, we're going to discuss the different types 26 00:00:58.140 --> 00:01:03.140 of memory modules, including DDR3, DDR4, DDR5, and SODIMM. 27 00:01:03.960 --> 00:01:07.110 Then, we'll move into a discussion of multichannel memory 28 00:01:07.110 --> 00:01:09.420 including single channel, dual channel, 29 00:01:09.420 --> 00:01:12.450 triple channel, and quad channel configurations. 30 00:01:12.450 --> 00:01:14.430 After that, we're going to move into a concept 31 00:01:14.430 --> 00:01:17.790 known as error correcting code, or ECC. 32 00:01:17.790 --> 00:01:19.620 Now this is a special type of memory 33 00:01:19.620 --> 00:01:21.690 that's often used in server environments 34 00:01:21.690 --> 00:01:23.910 so the memory can identify if there's an issue 35 00:01:23.910 --> 00:01:26.190 with the data being read from, written to, 36 00:01:26.190 --> 00:01:29.160 or stored in a given ECC memory module, 37 00:01:29.160 --> 00:01:32.910 and then, it can correct it before utilizing that data. 38 00:01:32.910 --> 00:01:36.030 Then, we're going to cover the concept known as virtual memory, 39 00:01:36.030 --> 00:01:38.130 which is essentially a special type of file 40 00:01:38.130 --> 00:01:40.080 that's going to be placed on your storage device 41 00:01:40.080 --> 00:01:42.720 when you run out of physical memory on a system. 42 00:01:42.720 --> 00:01:44.100 While this does allow your computer 43 00:01:44.100 --> 00:01:45.660 to pretend it has more memory, 44 00:01:45.660 --> 00:01:47.700 it can really slow down your system 45 00:01:47.700 --> 00:01:50.040 because hard disks and solid-state devices 46 00:01:50.040 --> 00:01:54.120 are so much slower than physical RAM inside of your system. 47 00:01:54.120 --> 00:01:56.850 Finally, we're going to move into a short demonstration 48 00:01:56.850 --> 00:01:58.470 where you're going to learn how to install memory 49 00:01:58.470 --> 00:02:01.380 into a computer system properly and safely. 50 00:02:01.380 --> 00:02:03.870 So, let's get started with system memory 51 00:02:03.870 --> 00:02:05.403 in this section of the course.