Questions tagged [ddr]

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

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What does (4G x 4) x 40 DRAM Composition mean?

I found two different specifications of memory modules on Samsung's official website, with the same Component Composition but different capacities. What do the three numbers in Component Composition ...
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Can I upgrade 256x8 sodimm ram with 2Rx8 one? [closed]

My old laptop has only one slot for ram. Current ram is SODIMM DDR3 4GB 1333 256x8 CL9 (see attached picture). I want to upgrade ram to 8GB but did not find DDR3 8GB 1333 256x8 CL9. There are a lot of ...
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RAM timing/frequency issues, impossible to enable XMP profile

The problem My RAM is supposed to run in XMP 2.0 at 1600MHz with the following timings CAS Latency: 16 RAS to CAS: 18 RAS precharge: 18 tRAS: 38 TRC: 56 As you can see there that's the expected ...
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DDR4 SODIMM what does the V lettering mean after the speed? E.g PC4-2666V

I'm normally familar with the lettering of RAM sticks but I'm a little stuck on what V means. For exampe I know 2400T is the T suffix at the end means it meets a specific JEDEC standard. A 2400T ...
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DDRx incompatibility [duplicate]

My question is - why I can't use ddr2 and ddr3 memory at the same time? What exactly makes them "incompatible"? Thank you.
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How to tell if a laptop is utilizing LPDDR5 Link-ECC functionality?

JEDEC introduces two kinds of ECC to LPDDR5, that's inline ECC and link ECC. [1] However, link ECC, which is used to protect data through transmitting, is optional.[2]. My question is, how could we ...
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how to read value of parameter for any ddr4 module?

Kindly someone educate me how to interpret any data data sheet for memory. I am refering to any data sheet for a ddr4 chip for example - https://www.3d-plus.com/data/doc/products/references/...
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What does the "S" suffix for RAM modules mean?

While looking for a RAM upgrade, I found two offers which apparently only differ in the "S" suffix of the type, and in the price: "32 GB RAM, 1 Modul, DDR4, 3200 MHz (PC4-25600), SO-...
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Why is DDR5 ram addresses 31-bit (and not using a potential last 32-nd bit? )

I watched this video on YouTube, and it mentions DDR5 is addressed using 31 bits. 5 bits for the bank, 16 bits for the row, and 10 bits for the column. I feel like a 32-bit address would "fit&...
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Ram tests do not match with Advertised Ram speed

I have 32 GB of Ram on a Windows 11 Machine.4 *8 GB Per My motherboard Manual : Supported Ram:4 x DIMM, Max. 128GB, DDR4 4400(O.C.)/4000(O.C.)/3866(O.C.)/3600 (O.C.)/3466(O.C.)/3200/3000/2800/2666/...
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After I upgraded to DDR4-3200 32 GB on a MAG X570 MSI, I'm getting a double beep... but everything works fine

This is a strange situation for me. I'm building a machine for my wife, and since it uses a compatible motherboard (identical except MPG instead of MAG), I'm also passing my old DDR4-2400 to her and ...
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Why does my HP EliteBook 8440p doesn't turn on with 2 new DDR3 4gb RAMs?

My HP EliteBook 8440p had 2 DDR3 RAM of 2GB each, so 4 GB total. This is my DxDiag info: The specs of these 2 RAM are: I wanted to change them to 2 4gb RAMs (so 8GB, the max supported ram for this ...
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3600MHz memory doesn't work to the spec

I'm trying to configure AMD R9 Radeon branded memory kit (model R9S432G3606U2K) to work at it's specified frequency, which is 3600. The motherboard is Asus Prime B550-Plus and, according to it's specs,...
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RAM - same RAM manufacturer, but different manufacturing date and possibly chip manufacturer - could it possibly cause problems?

This question is similar to this one Using two different brands of RAM sticks together BUT I have the same model number, RAM company is the same as well, XMP timings and XMP frequency is obviously the ...
Sir Muffington's user avatar
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Why my ASUS BIOS detects and runs Kingston DDR4 3200MHz memory as 2400MHz?

In my new computer there are 2x8Gb Kingston Fury DDR 4 (Kingston kf432c16bb1k2/16) modules. Still ASUS Prime Z590-A with Intel i5 11600-K detects it as 2400MHz. Modules installed according ASUS ...
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What is the amount of bytes read/written from a DDR1-333Mhz ram per second?

Here's what I calculated. DIMM memories have 64 bit data paths. Which means it can handle 64 bits of data per clock cycle. But since DDR1 rams are able to handle twice the data, it should be able to ...
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any validation of disparate memory speed and timings?

By going to the theory (and assuming bit time, command rate and cycle time are all part of the spec and must be true and always the same for all components claiming to be ddr4-xxx --which i would like ...
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Gigabyte Z590 Aorus Ultra BIOS does not boot with 4 x 32 GB DDR4?

I got a new PC configuration as described below (in the screenshots) with 4 x 32GB sticks. The system works fine with following memory configurations: Configuration #1 A1 - 32GB A2 - NONE B1 - NONE ...
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Is it safe to use RAM with a damaged capacitor?

While inserting a new DDR4 RAM module in the second slot of my laptop, I broke one of the capacitors (see image). To my surprise, my Windows 10 started normally indicating that new RAM is available (...
Павле's user avatar
2 votes
1 answer
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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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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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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 ...
Goel Nimi's user avatar
1 vote
4 answers
7k 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 ...
Youness Saadna's user avatar
21 votes
4 answers
32k views

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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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 ...
Damith's user avatar
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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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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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19 votes
3 answers
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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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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 ...
John Smith's user avatar
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1 answer
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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 ...
Hong's user avatar
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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 / ...
Lewis Kelsey's user avatar
4 votes
3 answers
766 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 ...
Johnsy's user avatar
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3 answers
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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 ...
Johnsy's user avatar
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1 answer
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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 ...
Bhuvan Gandhi's user avatar
1 vote
0 answers
134 views

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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2 answers
1k 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 ...
Max's user avatar
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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?
Rafid Haque's user avatar
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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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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 ...
Rich M's user avatar
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1 vote
1 answer
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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 ...
ted's user avatar
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0 votes
1 answer
140 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? ...
porton's user avatar
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1 vote
1 answer
11k 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 ...
J.E.Y's user avatar
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3 answers
4k 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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