Super User Stack Exchange
Super User Stack Exchange

Questions tagged [ddr]

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

Double Data Rate (DDR) RAM is a type of DRAM (dynamic random-access memory) used in computers. It uses double pumping to transfer data on the rising and falling edges of the clock signal. It replaced single data rate (SDR) RAM and can transfer data twice as fast.

Related Tags

  • for questions related to DDR2 memory

  • for questions related to DDR3 memory

  • for questions related to memory in general

97 questions
27
votes
4 answers

Can I use two types of DDR3 in the same motherboard?

I have a DDR3 RAM of 1333MHz of 4GB on my motherboard (Asus H61M). I have another stick of RAM DDR3 1600 MHz of 4GB. Can I use this in the other slot along with the original to reach a combined 8GB? The manual of my motherboard says the…
alansiqueira27
  • 431
  • 1
  • 5
  • 7
24
votes
6 answers

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 (24 GB in total). It seems to work normally. I ran…
Павле
  • 339
  • 2
  • 6
21
votes
4 answers

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 near by. Is it possible to combine CL-9, and CL-11 on…
guyd
  • 340
  • 1
  • 3
  • 10
19
votes
3 answers

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?
tsall98
  • 301
  • 1
  • 2
  • 5
13
votes
1 answer

What does + in the memory type of DDR4 RAM mean?

Some mainboard producers add a + to the specification of supported memory types (e.g. for ASRock X99 Extreme 3 supports DDR4-3000+). Does DDR4-3000+ somehow differ from DDR4-3000? The wikipedia article on DDR-SDRAM doesn't contain the sign+ or…
Kalle Richter
  • 2,212
  • 5
  • 40
  • 60
13
votes
3 answers

Can you tell DDR and DDR2 apart visually?

I'm getting a few old computers to take apart for parts soon. Most of them are definitely using DDR2 RAM, but there is the possibility that one or two of them are using DDR RAM. Since these are quite old, the manuals have since been lost. Is it…
Macha
  • 5,282
  • 16
  • 63
  • 92
8
votes
2 answers

Determine maximum RAM speed

I want to buy new RAM for my laptop and wondering if my motherboard supports DDR3-1600. This is the output of dmidecode -t 17: # dmidecode 2.11 SMBIOS 2.6 present. Handle 0x002D, DMI type 17, 28 bytes Memory Device Array Handle: 0x002C …
user1291235
  • 395
  • 2
  • 5
  • 10
5
votes
3 answers

dmidecode --type memory showing wrong DDR type?

A few weeks ago I decided to upgrade my laptop memory. In order to determine which type I need I used the following command on my Linux box (Ubuntu 10.04, not inside VM): sudo dmidecode --type memory And the output was: # dmidecode 2.9 SMBIOS 2.5…
leden
  • 746
  • 1
  • 8
  • 11
4
votes
1 answer

Adding new DIMM slot in laptop by soldering

I have laptop Acer Aspire One 722. Specification says that it has 2 DIMM slots, but when I opened it, I found it has only one, and there is a place for second one. I'm just interested, could I add second one DIMM slot? Can I just solder a new one…
atomAltera
  • 1,119
  • 1
  • 11
  • 15
4
votes
3 answers

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 configure it myself, but I never got the forth memory…
Kalle Richter
  • 2,212
  • 5
  • 40
  • 60
3
votes
2 answers

Dual channel vs DDR ram

I understand that DDR ram is basically sending the data on the falling and rising ends of the clock wave, but what is Dual Channel Memory. Google is just saying that it doubles the speed.
agz
  • 8,088
  • 21
  • 70
  • 112
3
votes
3 answers

Is there any way to increase the amount of DIMM slots in a motherboard?

I have a computer with 2GB of RAM, and will eventually change the whole motherboard, but for now I only need more memory. The problem is that the motherboard is DDR2 and only has two DIMM slots, used by two DDR2 1GB sticks. Is there any way to use…
Zequez
  • 1,602
  • 4
  • 22
  • 24
3
votes
1 answer

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 single-rank RAM and my new one is dual-ranked RAM.…
sibinpthomas
  • 31
  • 1
  • 1
  • 2
2
votes
1 answer

Do Ram specs besides DDRx matter?

I'm looking to install some extra DDR1 RAM into a computer, but while looking online for some, I see all these extra specs, like "Assorted Models PC3200 400 MHz DDR1 Desktop RAM". Do any of those other numbers matter? I've searched online, but I can…
Nathan
  • 133
  • 2
2
votes
1 answer

Combining multiple DIMMs in one memory channel

Every electronics engeneer knows that connecting more chips on the same line increases its capasistence and, thus, degrades the frequency. So, memory speed must be dependent on the number of chips in the channel. How in this case the DDR memory…
Val
  • 1
  • 7
  • 20
  • 39
1
2 3 4 5 6 7