Questions tagged [ddr]

Double Data Rate (DDR) RAM is a type of DRAM (dynamic random-access memory) used in computers.

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117 views

If you run fast RAM at a slower clock speed, will the latency timings improve?

I am buying a motherboard and CPU that support DDR4 2400 memory. For approximately the same cost, I can buy either of the following two types of memory: DDR4 2400 memory with timings of 16-16-16-39. ...
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237 views

Does motherboard or processor or both decide the ram generation/type and frequency?

As far as I know, the type and frequency of the memory supported by a computer depend on both the motherboard and the CPU plugged into the motherboard. But I have seen this page of Intel HM370 chipset ...
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232 views

Can I add to my laptop a DDR3L RAM of 1.35v if I already have a DDR3 RAM of 1.5v configured to run at 1.35v? [duplicate]

I have an MSI GP60 2QF Leopard Pro laptop that has a 4th generation Intel core processor (i5-4210H) and an 8GB Kingston DDR3 SDRAM PC3L-12800S 1600MHz RAM Memory (couldn't find a better nor original ...
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DDR4 SODIMM Compatability (Are there different SODIMM variations?)

I am looking to get an 8GB DDR4 SODIMM module to upgrade my laptop's RAM. I looked it up on Crucial and the recommended module was this: https://www.crucial.com/memory/ddr4/ct8g4sfs8266/ct13500791 As ...
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645 views

Can I use a Dual Rank Memory with my Single Rank Memory?

I have a laptop with SAMSUNG 8GB DDR4 2400MHz single Ranked RAM and I buy another SAMSUNG 16GB DDR4 2400MHz dual ranked RAM I want to know if they will work fine or I will have any compatibility ...
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Does it matter CL9 or CL11 when selecting DDR3?

I have an Asus motherboard, H97-E, with G.SKILL's 2X4GB DDR3-1600 CL-9. I wish to expand to 16GB, but find this excat type, is quite scarce nowadays. BUT a DDR3-1600, CL-11 can be found in stores ...
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1answer
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Why 2 1600MHz Makes 1333MHz & How to fix it?

I have 4GB DDR3 1600MHz Ram in my laptop(Dell Vostro). I bought another 4GB DDR3 1600MHz Ram and put it to my laptop. Now my laptop shows 8GB Ram as expected. But it show 1333MHz. Why is that? How to ...
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Is this RAM overclocking?

I have 2 DDR4 sticks (2x16 GB) running with a 3700X Ryzen CPU with an MSI B450M Mortar Max motherboard: one 2x16 GB Crucial rated at XMP 3200 MHz CL16 18-18-36-72 at 1,35V one 2x16 GB rated at XMP ...
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619 views

Intel CPU memory type meaning

I'm reading Intel CPU's spec, the memory type it lists a single frequency, like for i7-8809G, it says Memory Types: DDR4-2400, the confusing is does this mean only 2400 memory modules are supported, ...
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How to find compatible RAM for second laptop DIMM slot

I bought a laptop that has 2 DIMM slots, it shipped with a 16 GB stick in one of these slots, but I want to upgrade it and get another 16 GB stick without sacrificing my existing one. I did a little ...
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Check DDR clock frequency of my embedded device

How can I check the DDR clock frequency of my embedded device. The base OS is linux running kernel 4.4, but do not have tools like lshw, dmidecode .. Wondering if is there any way to get clock ...
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Can you combine DDR3 and DDR4?

I have a computer with two sticks of DDR4 RAM, and someone just gave me some old RAM that's DDR3. Can I use both in the same computer?
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997 views

What is diifrerent between memory module 1Rx16 with 1Rx8?

I have a DDR4 memory module with this specs that exists on my laptop: 4GB 1Rx16 PC4 - 2400T - SC0 - 11 I want to upgrade my memory module and I find a DDR4 memory with this specs: 8GB 1Rx8 PC4 - ...
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106 views

Why do we need PHY Interface between DDR Controller and DRAM Memory?

Is it required to have PHY in all the systems, if not what happens ? if PHY is removed can we still pull the data from DRAM memory using the DDR controller ? if yes, then why do we need to have PHY ...
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Screen stays black after memory upgrade?

I have 4GB memory from my HP Folio 13 1020us, labelled: 4GB 2Rx8 PC3-12800S-11-11-F3 I want to use it to replace the memory in my ACER E1-510. It's current memory is labelled: 2GB 1Rx8 PC3L-...
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Is 200 MHz DRAM Frequency (by speccy) the max frequency my ram is able to work at?

Is it possible that my settings are wrong? (single channel 6 Gb (as much as possible)) I've researched and found that everything as it should be. Am I wrong? Memory slots Total memory slots 4 ...
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1answer
724 views

Why is the DRAM Frequency of an Asus ROG STRIX B-350F motherboard so low?

An Asus ROG STRIX B-350F has an AMD Ryzen 7 2700 CPU. The memory is VENGEANCE® LPX 32GB (2 x 16GB) DDR4 DRAM 3000MHz C15 Memory Kit. It has only about 1000 MHz DRAM frequency: Could anyone provide a ...
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How much faster is Dual Channel than Intel's Flex Memory Mode?

How much faster is a RAM configuration of sticks 8+8+4+4 than one of 8+8+8? I'm interested in delay and speed in MB/s.
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Memory controller arbiters and memory accesses

Does anyone know what the Arbiter would look like on a DDR memory controller? I was thinking that in order to perform memory access operation reordering for optimisation it may contain a ROB / ...
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2answers
371 views

UEFI configuration for DDR4 memory on ASRock X99 Extreme3

I once over-estimated my knowledge of hardware (especially combination of motherboard and memory) and bought 4x 16GB GeIL EVO Potenza DDR4-3000 DIMM CL16 for an ASRock X99 Extreme3. I tried to ...
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Compatible DDR3 memory causes mainboard to beep 5 times

I got that old "office" PC lounging around which didn't have RAM modules. So I checked the specs and bought some new memory (2x Patriot DIMM 4 GB DDR3-1333). That's PC3 10600 or 1333 MHz DDR3 RAM. The ...
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RAM Dual Channel Confusion.

I got 4 slots of memory fitted with 4 memory sticks. Originally, I had 2 corsair xms3 4gb 2x2gb memory stick kit but 1 of the 4 sticks broke due to circumstances, which leaves me with 1 kit and a ...
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3answers
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Memory stick is showing 4GB but is actually only giving 2GB. Why?

I have a gigabyte 880 GA-ud3h rev 2.2 motherboard which I know supports up to 16 GB of ram, installed with it is a 64-bit Windows 7. On this mother board there are 4 slots for memory, on the first 3 ...
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142 views

Is there any specific requirements for RAM to upgrade laptop?

Currently, I have 4GB DDR4 RAM in my Dell Laptop. Previously I had Lenovo laptop with 4GB DDR4 RAM. Now I want to use that Lenovo's RAM in Dell Laptop. Is there any specific RAM requirements for ...
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What is the optimal RAM (DDR4) speed for a Ryzen 7 1800x CPU?

I am in the process of ordering parts to build a computer, and I am completely confused with what kind of RAM I should get. My motherboard is an MSI B350 Tomahawk Plus (pay attention to the Plus, ...
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2answers
702 views

DDR4 3400MHz RAM on 3200MHz motherboard

I'm looking to buy/assemble a new PC. I found some DDR4 3400MHz RAM with very good ratings, however, all the motherboards I can find (which are also suited for the processor I want to run, AMD Ryzen 5 ...
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302 views

will my total memory decrease if i use 2 2GB DDR2 RAM along with 2 2GB DDR3 RAM?

I have this weird mobo. Gigabyte G41M-Combo. It has 2 DDR2 RAM slots and 2 DDR3 RAM slots... I already am using 2 2GB DDR3 RAM. But what if I use those other 2 DDR2 slots to increase my total RAM?
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Intel DH77KC beeping only when adding the 3rd and 4th RAM

I built a PC using a motherboard Intel DH77KC. I have at the moment 2x 4Go HyperX-DDR3-1600 (12800) and I want to install 2x generic HP 4Go DDR3-1600 (12800). When I insert the HP memory, the computer ...
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522 views

DDR3 memory for HP

I have a HP Z600 Workstation and looking at the memory options on the HP website (https://support.hp.com/gb-en/product/hp-z600-workstation/3718663/model/3718664/document/c01709707) I'm wondering what ...
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843 views

Can a DDR3 ECC module be used in a slot without ECC?

I have tried for a while to use a DDR3 SODIMM module with ECC on the VC709. While I can get the memory that ships with it (Single Rank, 204 PIN, 64 Data Lines) to work easy enough, I cannot get a ...
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1answer
76 views

DDR3 memory modules: Should they be identical?

Is it true (or a legend) that when I insert more than one DDR3 1333MHz (or, more generally, any DDR) memory modules into a computer, the modules should be identical and of the same model and vendor? ...
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1answer
8k views

DDR4 RAM vs. DDR3 and EEC vs. Non-EEC

I am about to upgrade my DELL XPS 8900 and add 64GB memory to it, I have found that the montherboard of DELL XPS 8900 does support that kind of capacity. However I have a hard time picking up the ...
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3answers
2k views

What do letters PC-xxxx in the RAM memory naming stand for?

I have searched online and I did not find a single answer about this question. I know that the numbers after PC reprsent the bandwidth of the RAM memory module, but my question is what do the letters ...
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2answers
3k views

How to interpret the parameters in a DIMM datasheet?

I am trying to understand the internal layout of my DDR4 DIMM. Such as: rank number bank number row/column of the memory array within a bank According to intel customer script, the reported DIMM ...
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Is there a way to make ddr4-2134 working with ddr4-2400?

Look at screenshot: The BIOS correctly recognize all modules, but available memory is 16Gb. May the problem is spd, because A-DATA works only at 1090MHz while Crucial works at 1067Mhz: Is there a ...
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1answer
413 views

Can I go for a DDR4 RAM?

I am having Dell Inspiron 15 3542 touch. I just have a single RAM slot. Currently I have DDR3 RAM whose details are as follows: H/W path Device Class Description ================...
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DDR vs SDR with doubled frequency

Recently I've discovered that I don't see the actual difference between DDR RAM and SDR RAM with doubled frequency. How do these actually differ? It seems to me that memory bandwidth is the same, ...
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1answer
10k views

Can we mix dual-rank and single-rank DDR4 RAMs

I currently have a HyperX HX421C14FB2/8 8GB DDR4 RAM. I want to upgrade my system to have 16 GB RAM. I already have bought the HyperX HX421C14FB/8 8GB DDR4 RAM. I understand that my current RAM is a ...
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1answer
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Will different RAMs work on my IBM Thinkpad r50e?

I have an old IBM Thinkpad r50e, it has 2x256MB DDR1 RAM, which I would like to upgrade. I am going to buy a 1GB RAM, and my question is the following: Can I use one of the 256MB one with the new 1GB, ...
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1answer
544 views

What kind of RAM does a 2010 motherboard support? [duplicate]

Thanks for Zeiss Ikon' s comment. A: http://support.hp.com/us-en/document/c02014355 I have an old computer. The motherboard is made in 2010. It is missing a RAM card so I bought a DDR3 1600 RAM. But ...
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78 views

DDR2 memory compatibility

I'm planing to change memory on my old computer. I found 2 modules of this and 2 modules of this memory. Will they work together? Motherboard is Asus Striker II Formula.
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476 views

Can I use a 1600 MHz DDR3 stick on a motherboard that supports max 1333 MHz memory modules? [duplicate]

Is that possible? Would it be possible to simply run the 1600 MHz module on a slower speed (e.g. 1333 MHz)?
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DDR4 ram, how fast is too fast? [closed]

What is the point of getting 3600MHz DDR4 ram if the best Intel 2011-3 processor (6950X) has a memory spec of 2400/2133MHz and some of the best mobo's for that processor only support up to 3000MHz? ...
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2answers
488 views

Understanding how RAM and throughput work with expansion slots

I'm confused on how exactly the memory works on it. It x2 16gb sticks to make 32gb's. DDR4 2,666 so 2.6 billion cycles p/second. 2,666 x 8 gives us the 21gb throughput in the "PC4 21300" So I guess ...
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2answers
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memtest86 taking a lot of time

I'm new to using memtest; my problem is that I've been running memtest86 now for about 13hrs and its only 90% in pass 2/4 ?? It's currently showing 25 errors. My question is: Is this in some way ...
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1answer
24k views

Two RAM sticks into a four DIMM slot motherboard… which slots?

I am installing two 8GB DDR4 DIMMs into this motherboard: Gigabyte B150M-D3H-GSM There are four DIMM slots of alternating colors, labeled in the following order: DDR4_1 (gray) DDR4_3 (black) DDR4_2 ...
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1answer
181 views

Memory limitation on 6th intel CPU

Most systems with 6th gen cpu currently available (Dell X8900-3569BLK, Lenovo 700-90ED0007US) have 4 slots of DDR4 and limited to 32GB(I talked to live chat agents, checked www.crucial.com compatible ...
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1answer
68 views

DDR3 SDRAM specification understanding

What's difference between two memory modules 4GB 2Rx8 PC-10600S-09-10-D1 and 4GB 2Rx8 PC-10600S-09-10-F2. What the ending is stand for? I wonder if those modules could work together.
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Trouble with DDR3 RAM

I have a new custom built computer which is giving me some headaches due random crashes. Sometimes is just smaller problems, such as a Chrome tab closing. But there is times the whole system reboots, ...
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168 views

DDR3 1866 for Mobo that support 1600 only

i am unclear on this point if the Mobo says it support only 1333/1600, no o/C mentioned, but has XMP support will 1866 work at all? if so, will it work at 1866 or 1600? i am asking because i ...