Ddr3 Slot Compatible With Ddr4

So, for example, if you have DDR3 RAM and want to upgrade DDR4 RAM, it’s unlikely you will be able to in your current motherboard because different notch locations as mentioned above prevent correct installation. Of course, you can decide to opt for a new motherboard that’s compatible with. Dec 19, 2014 SO-DIMM DDR3 has 204 pins while SO-DIMM DDR4 has 260 pins. DDR3 memory modules are not compatible with DDR4 slots and DDR4 modules are not compatible with DDR3 slots. The notch in the DDR3 and DDR4 is placed at different places so that they will not be mistakenly fixed to wrongs slots.

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DDR4 is not backwards compatible with DDR3. It will be physically impossible to fit DDR3 RAM in a DDR4 slot and vice versa. As you can see the DDR4 slot is slightly wider than the DDR3 slot and the notches on the two slots do not align.

by btarunrDiscuss (25 Comments)
The transition between DDR2 and DDR3 system memory types was slower than the one between DDR and DDR2. DDR3 made its mainstream debut with Intel's X38 and P35 Express platforms, at a time when the memory controller was still within the domain of a motherboard chipset, at least in Intel's case. The P35 supported both DDR2 and DDR3 memory types, and motherboard manufacturers made high-end products based on each of the two memory types, with some even supporting both.
Higher module prices posed a real, and higher latencies, posed a less real set of drawbacks to the initial adoption of DDR3. Those, coupled with the limited system bus bandwidth, to take advantage of DDR3. DDR3 only really took off with Nehalem, Intel's first processor with an integrated memory controller (IMC). An IMC, again in Intel's case, meant that the CPU came with memory I/O pins, and could only support one memory type - DDR3. Since then, DDR3 proliferated to the mainstream. Will the story repeat itself during the transition between DDR3 and the new DDR4 memory introduced alongside Intel's Core i7 'Haswell-E' HEDT platform? Not exactly.Intel wants to make real sure that the swelling inventories of DDR3 memory modules are sufficiently digested by the market (sold out), before imposing DDR4 onto the mainstream. Hence the memory made its grand client entrance with Core i7 'Haswell-E,' a family of processors that starts at $390, going all the way up to $1000. The target audience of these chips won't mind spending the extra dime on cutting-edge technologies, including memory. 'Haswell-E' features a 256-bit wide DDR4 IMC, which at JEDEC standard speeds of DDR4-2133 MHz, can bathe the processor's 6-8 cores in 68 GB/s of memory bandwidth, right off the bat. DDR4 brings energy efficiency to the table. DDR4-2133 MHz modules ship with rated voltage as low as 1.2V, compared to the 1.8V DDR3 debuted with, before dropping to 1.65V on Nehalem, and 1.5V on SandyBridge. These drops in module voltages were made possible with DRAM manufacturers shrinking their fab process nodes.
Intel's bright idea about transitioning between DDR3 and DDR4 for mainstream client platforms is not hugely different from how its P35 Express chipset dealt with the issue. It plans to come up with a new memory module form-factor, called UniDIMM. It's a DIMM that can hold both DDR3-class and DDR4-class DRAM chips, designed for Intel's upcoming Core 'Skylake' processors. 'Skylake' will feature an IMC that supports both DDR3 and DDR4. With UniDIMM at their disposal, system manufacturers can source UniDIMM modules with DDR3 DRAM chips (which will be cheap, until DDR3 inventories begin drying up), and offer upgrade potential to UniDIMMs with DDR4 chips (which will get progressively cheaper). Future notebooks that ship with DDR4-UniDIMM memory will still support older DDR3-UniDIMM.
Capiche? No? UniDIMM is a standardized module design, with its key cutout notch at a certain point. Measuring 69.6 mm x 20 mm, it's as wide, but shorter than an SO-DIMM. There will be two kinds of UniDIMMs, DDR3 UniDIMM and DDR4 UniDIMM, both having 260 pins, the same key position (but one that's different from DDR3 SO-DIMM), and hence work on a platform that supports both standards, 'Skylake,' in this case. The module will be designed to support both standard- and LP- DDR3 and DDR4 DRAM chips.
DDR3/LPDDR3 UniDIMMs will ship with frequencies of 1866 MHz (DDR) as standard. DDR4/LPDDR4 ones will start at 2666 MHz (Skylake's standard DDR4 memory clock speed, double that of DDR3-1333, which was Lynnfield's standard). There will be higher-tier standardized clocks, such as 2133 MHz for DDR3/LPDDR3, and 2933 MHz for DDR4/LPDDR4. Since UniDIMM is more of Intel's pet-project than that of JEDEC, it gets to announce which memory module makers have expressed interest in it - Kingston and Micron (makers of Crucial) have expressed commitment to it.
'Skylake' Core processors come out in 2015. That's going to be when DDR4 enters mainstream client platforms.

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25 Commentson How Intel Plans to Transition Between DDR3 and DDR4 for the Mainstream

#1
So they plan on doing a AMD, where the IMC will support both, to please the retailers that still have a crap ton of DDR3, and the performance benefits of DDR4 are not there yet.
Their ideas on UniDIMM seems a bit retarded though, 1866 for DDR3 as default? Seems like a good way to get stuck with platform specific hardware much like RAMbus. How about giving us a riser card that fits a DDR4 slot that adapts to DDR3, or a board with both slots but only two of each? But that might be too simple, sounds like a dick move to force people who adopt to stay with their proprietary hardware or pay the price.

Not having enough RAM in your PC can truly wreck your day no matter what you're trying to accomplish. If you're in the market for more RAM, you might be wondering about the differences between DDR3 and DDR4 RAM, and whether or not they really matter to you.

RAM explained

The random-access memory (RAM) in your computer is used to hold data that is frequently accessed by your processor (CPU). It can be likened to your office where you have a corkboard with a bunch of papers on it for easy, quick reference.

Why use RAM when we have hard-disk drives (HDD) and solid-state drives (SSD)? Triple fortune dragon online. Reading from and writing to a hard drive, even a solid-state drive, is much slower than reading from and writing to RAM. The connection between the CPU and the RAM, also know as the memory bus, is designed for speed, and the entire package uses a small amount of energy to do its job. Accessing a hard drive is sort of like standing up, opening a filing cabinet, and pulling out a paper — much slower than if the paper is already on a corkboard in front of you.

DDR3 and DDR4 RAM don't work together

The first noticeable difference between the two RAM-types is the physical layout of the pins on each module. DDR3 RAM uses a 240-pin connector, while DDR4 RAM uses a 288-pin connector.

Ddr3 Slot Compatible With Ddr4 Pc

Why are they different? A motherboard and CPU that work with DDR3 RAM don't work with DDR4 RAM and vice versa. The different connectors ensure no one accidentally installs the wrong type of memory. Also, take note that not all RAM works with all processors, even if it fits into the motherboard. Take time to research and make sure all parts of your PC are compatible. If you need a hand, PC Part Picker has a wonderful tool that shows you what works together and what doesn't.

You might also hear mention of DDR3L RAM. This RAM has the same pins and works with any CPU and motherboard that works with DDR3 RAM. The difference? DDR3L RAM can function at both 1.5V and 1.35V, while DDR3 RAM is stuck at 1.5V.

DDR4 RAM looks faster on paper

When studying data transfer rates of RAM, you'll see it measured in either million transfers per second (MT/s) or gigatransfers (billion) per second (GT/s). A higher transfer rate means you have more bandwidth and will thus be able to transfer more data at once. DDR4 RAM can transfer data at a rate between 2133MT/s and 4266MT/s, while DDR3 RAM can only hit transfer data rates between 800MT/s and 2133MT/s.

Another number you'll see is the clock speed, which is how fast the RAM can read and write data. The clock speed number, represented in megahertz, is the number of cycles per second the RAM can perform.

Finally, Column Access Strobe latency, also known as CL, must be taken into consideration. CL is the number of clock cycles it takes for the RAM to deliver a piece of data requested by the CPU. Even if you have blazing fast clock speeds, high latency will put a damper on your RAM party.

If we compare four types of Corsair RAM, it's evident that a higher clock speed and the higher transfer rate afforded by DDR4 RAM doesn't necessarily always make it better.

NameTypeClock speedLatencyResult
Corsair Vengeance ProDDR3L1600MHzCL99/1600MHz = 0.0056
Corsair Vengeance LPXDDR42400MHzCL1414/2400MHz = 0.0058
Corsair Dominator PlatinumDDR32400MHzCL1111/2400MHz = 0.0045
Corsair Dominator PlatinumDDR43200MHzCL1616/3200MHz = 0.0050

When shopping for RAM, always take all specifications into consideration. Which slot machines to play at sandia casino albuquerque nm. Higher numbers on the label don't necessarily mean faster performance.

DDR4 RAM uses a lower voltage

The standard voltage of DDR3 RAM sits at 1.5V, while DDR3L RAM can use both 1.35V and 1.5V. DDR4 RAM, on the other hand, uses 1.2V. While this isn't a big difference for most of us using one or two RAM modules — you're not going to see a difference on your electricity bill — server farms with thousands of RAM modules will definitely enjoy sucking less power.

DDR4 RAM costs more

When DDR4 was first released, the price gap was quite large. The gap has shrunk a lot since then, but in general, DDR4 RAM still costs more.

If we look at the prices of the Corsair Dominator Platinum RAM from the table above, it's clear that even though the DDR3 RAM performs better when considering clock speed versus latency, it is still cheaper — DDR3 costs about $115, while DDR4 costs about $130. Again, this isn't a huge difference if you're only buying one or two modules, but in instances where you need a lot of RAM, the cost can really add up.

So..which RAM do I choose?

Going with DDR3 or DDR4 RAM really depends on what other hardware you're currently using, and what hardware you plan on using in the future.

If you have an aging motherboard and a 4th- or 5th-generation Intel CPU, you'll probably be going the route of DDR3 once you figure out all the compatibility stuff. If you have a recent motherboard and, say, a 6th-generation Intel CPU, DDR4 RAM is a good investment for the future — it's hard to believe DDR4 RAM won't be used for quite some time to come.

Which RAM do you use?

What are you running in your PC build? Were you able to go with DDR4, or are you still using DDR3? Tell us in the comments section below!

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Use Ddr3 In Ddr4

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