WEBVTT 00:00:00.320 --> 00:00:07.960 One of the most common questions I receive is, "My computer uses DDR3 RAM, 00:00:05.920 --> 00:00:14.799 but all the new graphics cards come with GDDR5 RAM. Will they work in my system?" 00:00:11.280 --> 00:00:17.119 In a word, yes. In 74 words, yes, 00:00:14.799 --> 00:00:21.760 because the type of RAM your CPU can use, your system memory, doesn't impact 00:00:19.680 --> 00:00:26.640 the type of RAM that your graphics card can use. Because the CPU or central 00:00:24.640 --> 00:00:31.519 processing unit interacts directly with its own memory and the GPU or graphics 00:00:29.519 --> 00:00:36.000 processing unit interacts directly with its own memory. Those processors work 00:00:34.079 --> 00:00:40.960 together and communicate with each other through a PCI Express slot. So the type 00:00:38.719 --> 00:00:45.920 of RAM they're each using doesn't matter. So another common question then 00:00:42.960 --> 00:00:52.000 is this. Why is video card memory so far ahead of system memory? DDDR5 has been 00:00:48.960 --> 00:00:53.600 available for years, while DDR4 is still 00:00:52.000 --> 00:00:59.440 not available, and there's basically no mention of DDR5 at all. Can't we just 00:00:56.399 --> 00:01:01.520 use GDDR for our CPUs to take advantage 00:00:59.440 --> 00:01:05.439 of all those technology improvements? Well, this answer is a little bit more 00:01:02.960 --> 00:01:10.880 complicated. Well, each new generation of GDDR or DDR aims for similar 00:01:08.720 --> 00:01:14.799 improvements over the last one. higher capacities, reduced heat output and 00:01:13.119 --> 00:01:18.640 power consumption and higher performance, particularly with respect 00:01:16.720 --> 00:01:23.280 to maximum bandwidth. That doesn't mean that these technologies are the same. A 00:01:20.799 --> 00:01:28.479 common misconception is that there is a correlation between the generational 00:01:25.119 --> 00:01:31.520 numbers in GDDR and DDR, but actually 00:01:28.479 --> 00:01:34.000 they're independent of each other. GDDR2 00:01:31.520 --> 00:01:40.360 was somewhat related to DDR2, but the newer DDDR4 and DDDR5 standards are 00:01:37.680 --> 00:01:46.720 actually much more closely related to DDR3 than to DDR4 or a future DDR5 00:01:44.240 --> 00:01:50.720 standard. Okay, so if they're not really as different as they sound and they're 00:01:48.159 --> 00:01:55.280 just variations of similar technology, why do we need two different types of 00:01:52.560 --> 00:02:02.000 memory? Well, as the old saying goes, horses for courses, my friends. I mean, 00:01:58.320 --> 00:02:04.960 oh gross. I didn't mean meal courses. I 00:02:02.000 --> 00:02:10.479 meant race courses. Yuck. That's not even a tasteful joke. Sorry. Now that 00:02:07.520 --> 00:02:15.599 we're back on track, now that's a great joke. My point stands. You want memory 00:02:12.959 --> 00:02:19.520 that's specialized for your application. The way a typical person uses a 00:02:17.360 --> 00:02:24.400 computer, we don't actually need any more bandwidth for system memory. It's 00:02:22.000 --> 00:02:29.440 much more important for everyday tasks to have very low latency access to your 00:02:27.360 --> 00:02:34.480 RAM with better granularity. While a graphics card is typically moving 00:02:31.280 --> 00:02:36.560 massive chunks of data into and out of 00:02:34.480 --> 00:02:40.959 the frame buffer that is the RAM, things like high resolution game textures or 00:02:38.879 --> 00:02:45.040 large data sets for computer simulation work. The average desktop is being 00:02:43.120 --> 00:02:49.760 bombarded with a multitude of much smaller transfers like that instant 00:02:47.360 --> 00:02:54.160 message you just received or that virus scan that's picking through all your 00:02:51.360 --> 00:02:59.720 files in the background. Normal DDR is optimized for desktop use and GDDR just 00:02:57.440 --> 00:03:04.400 wouldn't be as suitable in spite of its impressive on paper performance numbers, 00:03:02.319 --> 00:03:07.360 especially with respect to bandwidth. Speaking of impressive performance, 00:03:05.840 --> 00:03:12.000 we've got a new sponsor that we absolutely love. Shutterstock.com is the 00:03:10.000 --> 00:03:15.680 affordable way to get royalty-free stock photos, graphics, and video footage that 00:03:13.840 --> 00:03:20.480 you can use for anything from gussying up a PowerPoint presentation all the way 00:03:18.000 --> 00:03:25.280 to inclusion in a professional newscast. 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Leave a comment and let me know, did this help 00:04:27.600 --> 00:04:33.280 clarify DDR versus GDDR for you, or did 00:04:31.680 --> 00:04:36.400 you already totally understand this and now it's just a convenient little 00:04:34.880 --> 00:04:41.840 resource for you to send to people whenever they ask about it? And uh 00:04:38.400 --> 00:04:41.840 right, don't forget to subscribe either.