Is Pc3 The Same As Ddr3

[Karlyn Hemmerling]

DDR3stands for Double Data Rate type three but does not imply a specific frequency or bus rate. The PC3-xxxx designates the particular RAM's speed rating and means that the memory certified as able to run at that bus speed. So DDR3 RAM PC3-1333 runs at 1333 MHz while the PC3-1066 runs at 1066 MHz.

Apple doesn't provide any information about their installed RAM other than it's DDR2 or DDR3 with a specified bus speed rating. Presumably the CAS, Column Address Strobe - a measure of latency, is not needed. I assume that means the memory Apple uses will have the same overall specs as what you would purchase in a third-party market.

After browsing for suitable alternatives, I narrowed it down to this and this as my possible options. I am concerned that the first one is DDR3 with PC3L while the second one is DDR3L with PC3. This has gotten me confused.

Upon googling up these terms I found that:"PC3 or DDR3 is the operated at 1.50v whereas PC3L or DDR3L is the Low Voltage memory module that operates at 1.35V." This makes it look like the two terms mean the same thing. But then in the description of the two items, they do not match and this has got me confused.

What i knew is that ddr3 is 1.5 and ddr3L is 1.35 but can work with 1.5 system.With this If your laptop originally has a ddr3L, DDR3 might not work since we can say that the system is working with a 1.35v for memory and with this, you might have a problem with ddr3 sinceddr3 is rated at 1.5 volts.

On the other hand, if your laptop has an original RAM of ddr3, DDR3L will work because of the capability of ddr3l to work with 1.35 and 1.5v which explains a laptop that has an original of ddr3 before and switched to ddr3L.hope this help.....

I have an ASUS A55VD-NS51 laptop with 6GB of RAM and I've been wanting to upgrade the memory for a while. I've finally decided to go through with it, but I am unsure as to whether to buy DDR3 SDRAM or DDR3 SODIMM for it. There is no indication of which kind of RAM it uses, and frankly, I'm not really sure if there is a difference or not, but I would love some insight!

Suggestion: Since, you already have 6GB (4GB+2GB) of memory, you need to replace the 2GB with a new 4GB for max upgrade, the extra ram should be exactly the same as the original for maximum upgrade performance

And last but not least: check how many SoDIMMs are already in the laptop and how many you can use. There is nothing more frustrating than buying new memory and discovering that the memory slot is already in use with an equal sized module. :)

According to ASUS, the A55VD has 2 x SO-DIMM slots. You'll want to purchase DDR3 1600 Mhz SoDIMMs. The laptop supports up to 8 GB of RAM, total. If you have 6 GB right now, you probably have one 4 GB and one 2 GB stick and may be able to just pick up one 4 GB stick to go up to 8 GB total.

The clock, address and command signals must still be routed with the length matching requirements listed in the DDR3 Design Requirements for KeyStone devices. That document states that the length of all address and command signals from the SOC to the memory device should be within +/-20mil of clock trace length. The app note states that it's better practice to keep the address and command traces between the length of the clock to 20mil less than that length.

The length matching between the DQSP/N, DQM and the DQ lines is the tighter +/-10mil. Although the same principle applies, the tighter length matching should compensate a longer DQSP/N length. As long as all the signals are within the +/-10mil, you should be fine.

Each of the eleven signals within a byte lane must be length matched but the lengths from one byte lane to the next do not have to match. For example, the DQS0P/N, DQ0-7 and DQM0 of the C6657 EVM are length matched to around 1264mil while the DQS2P/N, DQ16-23 and DQM2 are length matched to 1173mil. The leveling process will compensate for the length of each byte lane.

But the routing and length matching of the address lines have raised a question. What about the length of the via barrel ? I have address lines in layer L3, L5. L8 and L10. Layer L1 to L3 distance 0.183mm and Layer L1 to L10 distance 1.178mm. This result in a difference in travel length of approx 2mm -> 14 pS

The number of address and command lines make it impossible to route them on the same layer. Fortunately, these signals are actually transitioning at half the speed of the data lanes so there is additional slack available in the timing. The trace length matching numbers provided recognize that the signals will be routed on different layers and that the via barrel lengths will be different. Matching the trace length without including the via barrels should be sufficient. Remember that you are matching the trace length from the the SOC to the memory individually for each memory device. The stubs between the fly-by trace and the ball of the memory should be kept as short as possible as well.

The thing is: "the guy" at the repair shop said the ram was probably the cause, because using a low-voltage ram on the system originally designed to use DDR3 ram caused the system to have "extra energy running around" and it fried the logic board.

Shorting is a thing, but yeah, good idea to investigate idomatic explanations like "extra energy running around." The only time I putt DDRL ram into a my DDR machine (this same Macbook), my computer simply wouldn't boot up until I put the old RAM back in.

For the unfortunate folks coming here after the fact looking for answers, DDR3L is dual-voltage compatible. It'll run safely at 1.5v or 1.35v if you're on a newer system that supports the lower voltage. I've got 16GB of DDR3L memory in a Lenovo IdeaPad Y500(third gen, i7 3630qm) and it's running fine. CPU-Z reports it as 1.5v.

I just asked a slightly related question. My system came with the exact same memory and when my new RAM arrived (2 x 8) from Ifixit, I noticed that it was DDR3L and no matter what I did, my system would not boot. I suspect this is the issue - or the RAM sticks suffered from water damage?

@rjones - The older 2009 & 2010 had issues as the standard what not tight enough with the width of the SO-DIMM's some where just too thick! Unless you got some real odd SO-DIMM's the newer DDR3 based systems were much better. Even still people love forcing things which I can tell you will kill the slots! In addition a good bang on the cover in the 15" models right where the slots are could damage them too.

I would say that, it seems your laptop may not support an 8GB module. Or, your laptop may not support asynchronous RAM configurations, (e.g., 4GB & 8GB or, 2GB & 4GB RAM module combinations.) What model/make is your device?

The systems limits listed are not always correct as these where what Apple tested during the development of the system. As Apple did stick with the DDR3 & DDR4 standards larger SO-DIMM's that came out later in time often still work.

There is nothing that can go wrong by using DDR3L instead of DDR3 standard RAM. The DDR3L RAM is "built-in" backward compatible with the standard DDR3 voltage profile as well. It is simply ABLE to operate at a lower voltage than the standard DDR3 RAM does.

Dan, apparently, knows what he's talking about here. I would only add that Over Clockable (AKA: O.C. or XMP) profile RAM may NOT be compatible with older laptops or desktops designed to useDDR3-8500 (1066 MHz) as, the lowest backward compatible frequency for the O.C.'d RAM is most likely going to be 1333 MHz or 1600 MHz, which are not supported by those older DDR3 standard capable devices.

I upgraded my old laptops ddr3 to a 8gb ddr3L stick but I'm getting blue death screen with a bad pool header.what could be the possible reason and any solution for it?.my total capacity is 16gb also I have tried another ddr3L 8gb stick.

Yes, DDR3 and PC3 RAM are the same. DDR3 stands for Double Data Rate 3, which is a type of computer memory technology. PC3, on the other hand, refers to the third generation of memory modules compatible with personal computers. Both terms are used interchangeably to describe the same type of RAM.

DDR3 and PC3 RAM are essentially the same thing. The term "DDR3" stands for "Double Data Rate 3," while "PC3" refers to the third generation of memory modules for personal computers. Both terms are used interchangeably to describe the same type of RAM.

DDR3 and PC3 RAM are widely used in older computer systems and have been succeeded by newer generations such as DDR4 and PC4. DDR3/PC3 RAM offers a number of advantages over its predecessors, including faster data transfer rates, lower power consumption, and increased memory capacity. However, it is important to note that DDR3 and PC3 RAM are not compatible with each other, as they have different pin configurations and voltage requirements.

When it comes to compatibility considerations, it is crucial to ensure that your computer's motherboard supports DDR3/PC3 RAM. Most modern motherboards are not compatible with DDR3/PC3 RAM, as they are designed to work with newer generations. Therefore, if you are planning to upgrade your system's RAM, it is essential to check the specifications of your motherboard and determine the type of RAM it supports.

In conclusion, DDR3 and PC3 RAM are essentially the same thing and are used interchangeably to describe the third generation of memory modules for personal computers. Although DDR3/PC3 RAM offers several advantages over its predecessors, it is important to consider compatibility with your motherboard before upgrading your system's RAM.

DDR3 and PC3 RAM are not exactly the same, but they are closely related. DDR3 stands for Double Data Rate 3, while PC3 stands for Personal Computer 3. Both terms refer to the type of RAM used in computers, but there are some differences between them.

DDR3 is a type of synchronous dynamic random-access memory (SDRAM) that is commonly used in computers. It is an improved version of its predecessor, DDR2, offering faster data transfer rates and higher bandwidth. DDR3 RAM modules have 240 pins and operate at voltages ranging from 1.5V to 1.65V.

On the other hand, PC3 is a classification system used to categorize DDR3 RAM modules based on their specifications. It is a part of the JEDEC (Joint Electron Device Engineering Council) standard, which sets the guidelines for the design and manufacture of memory modules. PC3 RAM modules are classified into different categories, such as PC3-8500, PC3-10600, PC3-12800, etc., based on their maximum data transfer rates.

In summary, DDR3 refers to the type of RAM, while PC3 is a classification system for DDR3 RAM modules. DDR3 RAM is backward compatible with DDR2 RAM slots, but it is not compatible with DDR4 RAM slots, which are the latest standard in computer memory.

It is important to note that as technology advances, newer and faster RAM standards, such as DDR4 and DDR5, are becoming more prevalent in the market. DDR3 and PC3 RAM are still widely used, but they are gradually being replaced by newer generations of RAM for better performance and efficiency.

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