Otherwise, DDR2 is obsolete.ĭDR3 was released way back in 2007. DDR2 has been well and truly superseded, but you can still buy it in limited quantities to upgrade older machines. Losing power is like wiping your desk clean of every document.ĭDR2 is the oldest kind of RAM you're likely to come across today.
The contents of your system RAM are lost as soon as you turn the power off. Unlike an office desk, however, RAM cannot act as permanent storage. Just as having a bigger desk can hold more bits of paper on it without becoming messy and unwieldy (as well as requiring more trips back to the filing cabinet to reorganize). The more RAM you have, the more things you can have quick access to at any one time.
The RAM is like an entire office workstation, while the CPU cache is like the actual working area where you actively work on a document. The hard drive is the filing cabinet in the corner.
Your system uses RAM to store working parts of the operating system temporarily and the data your applications are using actively. It acts as a middle ground between the small, super-fast cache in your CPU and the large, super-slow storage of your hard drive or solid-state drive (SSD). Read on for explanations on the different kinds of RAM, how to read RAM specifications, and exactly how RAM works. What's the difference between DDR3 and DDR4? DIMM and SO-DIMM? Is there a difference between DRR3-1600 and PC3-12800? Is RAM latency and timing important? Shopping for RAM can be confusing, though. You probably already know that more RAM is better, but maybe you're looking to install more RAM now. It's where your computer keeps track of the programs and data you're using right now. And even though DDR4 does cost a bit more than DDR3 (about $70 for 16GB DDR4-2666 compared to $60 for DDR3-1600), it's the better choice for any new PC.RAM is the short-term memory of your computer. There are a few select instances where both memory types are supported, but you end up with half as many slots (eg, two DDR3 and two DDR4, instead of four DDR4). DDR4 will come down to your choice of CPU and motherboard. Core i7-8700K meanwhile doubles again to 128GB, helped in large part by the availability of higher capacity DIMMs.īut ultimately, the question of DDR3 vs. The Core i7-4770K officially lists 32GB as the maximum supported RAM, while i7-6700K doubles that to 64GB. It's possible to get larger DDR3 memory modules, but many won't work in standard desktop motherboards. There are potentially other differences as well. DDR3 was slightly faster about half the time, and typically only a few percentage points separated the two memory types. The difference between DDR3-2133 and DDR4-2133 was negligible in a number of applications, ranging from Handbrake video conversion to half a dozen different games.
How does this translate to real-world performance? As Anandtech found in some comprehensive benchmarks comparing DDR3 and DDR4, neither was a clear performance leader.
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