Before determining how much RAM you should purchase, it will be helpful to know how much RAM you already have installed in your computer. You can quickly check your installed RAM, regardless of what operating system you are using.  Windows - Press ⊞ Win+Pause to open your System Properties window. Your installed RAM will be listed in the System section. Mac - Click the Apple menu and select "About This Mac". Your installed RAM will be displayed in the Memory entry. There are several factors that will dictate how much RAM your system can support, including your operating system and motherboard limits:  If you are using Windows, a 32-bit version can support up to 4 GB, while a 64-bit version can support up to 128 GB. You can check what version of Windows you have by pressing ⊞ Win+Pause and looking for the "System type" entry. Even if your computer supports up to 128 GB, there's a good chance that your motherboard doesn't support that much. You'll need to check the documentation for your motherboard or run an online system scanner (Crucial.com has a good one) to see how much memory your motherboard supports. Mac users will need to check their documentation to see how much their computer support as it varies significantly from model to model. If you don't have the documentation anymore, you can look up the specs of your model on the Apple support site. See this guide for more details on determining the maximum amount of RAM your computer supports. RAM has gone through several revisions over the years. The standard these days is DDR4 RAM, but if you are upgrading an older computer, you may need DDR3, DDR2 or even DDR. If this is the case, you will likely want to consider upgrading the entire computer, as older types of RAM are getting increasingly expensive. You can determine what type your computer uses by referring to the documentation or running a tool like CPU-Z, a freeware utility that analyzes your system. RAM comes in a variety of different speeds. If there are multiple speeds installed, your entire system will clock down to the lowest speed present. This can actually hurt your performance, even if you are adding RAM.  The clock speed of RAM is measured in megahertz (MHz). Motherboards typically support a range of clock speeds. If you use CPU-Z to check your memory clock speed, you will need to multiply the displayed MHz value by two, since CPU-Z doesn't display the memory multiplier. All installed RAM should be the same speed for the best performance. Nearly all RAM should be installed in pairs. The total value of each module should be within the limits of your motherboard. For example, if you are installing 16 GB of RAM, you'll need to install either two 8 GB modules or four 4 GB modules. If your motherboard has an 16 GB limit, it likely won't support a single 16 GB memory module.  RAM often comes packaged in pairs to make purchasing easier. Many computers will work with only one RAM module, but this is bad practice and you will have worse performance. You should only do this if necessary. Most desktop computers use DIMM RAM, while most laptops use SO-DIMM, which is smaller. The notable exception is many iMacs, which also use SO-DIMM. Other than form-factor, most of the other specifications discussed in this section apply to both desktop and laptop memory.
चेक करें की आपके कंप्यूटर पर इस समय कितना RAM इन्स्टाल किया हुआ है: चेक करें की आपका कंप्यूटर और ऑपरेटिंग सिस्टम कितनी RAM को सपोर्ट कर सकता है: चेक करें की आपका मदरबोर्ड किस RAM फ़ारमैट को सपोर्ट करता है: क्लॉक स्पीड पता करें: RAM मौड्युल्स को जोड़े से खरीदें: डेस्कटॉप और लैपटाप मेमोरी के बीच के फर्क को पहचानें: