Double Data Rate 3 (DDR3) is a type of DRAM (dynamic random-access memory) used in computers

learn more… | top users | synonyms

5
votes
1answer
20k views

If a motherboard doesn't explicitly support a RAM frequency, is still compatible?

For example, my Asrock P67 Extreme4 says this: Supports DDR3 2133(OC)/1866(OC)/1600/1333/1066 non-ECC, un-buffered memory Is RAM clocked at 2400 MHz compatible? Will the performance be downgraded ...
25
votes
3answers
88k views

CPU-Z says my PC3-10600 1333MHz RAM is actually PC3-10700 667MHz. Do I have 1333 or 667 MHz RAM?

CPU-Z says this: DDR3 4096 MBytes PC3-10700 (667 MHz) I am supposed to have PC3-10600 1333MHz. What am I not understanding? Or, is my RAM only half of what the label and seller claims it to be?
8
votes
2answers
20k views

Is a DDR3 MB compatible with DDR2 RAM?

If a motherboard's specifications say it supports DDR3 SDRAM sticks, would I be correct to assume it is also compatible with DDR2 RAM? Am I wrong, or does it depend on the motherboard?
5
votes
5answers
1k views

3GB of RAM showing up as 2GB

Last year I built a Core i7 920 system based on the ASUS P6T Deluxe motherboard. I have 3x1GB of DDR3 (triple-channel configuration), but only 2GB is being reported by: Windows XP, CPU-Z, the BIOS. Is ...
1
vote
1answer
948 views

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 ...
22
votes
4answers
5k views

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? ...
12
votes
3answers
12k views

How to check if two memory modules are being used with dual channel?

I have two 1333 DDR3 memory modules with different brands. I wonder if they can be used in a dual channel setup. How can I check that?
4
votes
5answers
12k views

Memory upgrade to 8GB on unibody MacBook

I bought the 13" unibody MacBook one month prior to it's upgrade to become the new improved 13" unibody MacBook Pro (with unopenable battery compartment, extra 3 hours of battery life, more color ...
3
votes
3answers
2k views

Would I see benefit if my RAM is faster than my processor's FSB?

I always thought processor's FSB was the limit of how fast the RAM could be. However, while configuring a Lenovo laptop, I see options for RAM that's faster than the CPU's FSB CPU = Intel® Core™ i5-...
2
votes
1answer
2k views

Different RAM voltage

on my PC I have 2 kingston RAMs. The only difference is that one runs at 1,35V, the other at 1,5. As you can see frequency, latency and others doesn't change. My motherboard is an Asus K30AD_M31AD-...
2
votes
4answers
1k views

Is DDR3 worth it? [closed]

I'm looking at some of the gaming PC's on NCIX.com and the ones that support DDR3 are at least about $400 more than the most expensive DDR2 PC's(when other factors are ignored). Is it worth upgrading ...
4
votes
4answers
3k views

Why can I only use 3.47GB of my 8GB of RAM on my Windows 7 64-bit machine?

I had 4GB of RAM and just installed another 4GB. When I go to my computer's properties I see it recognizes all 8GB but I'm still only able to use 3.47GB. My motherboard is an Asus P7H55-M which is ...
3
votes
2answers
724 views

6 x 2048 faster than 3 x 4096 DDR3 triple channel memory modules?

Considering same timings, brand and technology triple channel RAM memory modules would: 6 x 2048 MB modules be faster than 3 x 4096 MB modules ?
2
votes
1answer
1k views

Should we expect DDR3L RAM to work on the Intel first-gen Core i3 platform?

I have a 4 GiB DDR3 RAM, a 4 GiB DDR3L RAM, and a laptop with an Arrandale-based Intel Core i3 CPU and an Intel HM55 chipset. The DDR3 RAM works fine on both Linux (Ubuntu 12.04 64-bit) and Windows (...
1
vote
2answers
760 views

What kind of RAM is compatible with my system? [closed]

I want to upgrade my RAM but am not sure if I should/can get DDR2 or DDR3. Sound like a stupid question, but CPU-Z is showing the following: At the top, it is saying that it’s DDR3 RAM, but I have ...
1
vote
1answer
2k views

Do DDR3 modules come in sizes greater than 2GB?

The standard answer to how much RAM i can install in my Acer Aspire One D255 is "2 gigs" and the standard reason given is "because it only has one RAM slot". Does this mean DDR3 RAM modules only go up ...
1
vote
1answer
3k views

What happens if I install slower RAM than specified compatible with the motherboard?

Specifically, will there be any instability or other problems if I install DDR3 1066MHz (PC3-8500) RAM with a motherboard rated to be compatible with DDR3 1600MHz (PC3-12800) & DDR3 1866MHz (PC3-...
0
votes
1answer
355 views

Semi-Hybrid Triple Channel DDR3

I have 3 x Corsair 2GB DDR3 1600MHz, and I want to expand it with 3 more DIMMs. Obviously to keep my triple-channel, I'd be best to buy an identical 3 DIMMs kit as I have now, because triple-channel ...
0
votes
2answers
10k views

How to find out RAM speed

I was in a shop today and wanted to know the speed of the installed DDR3 RAM. The assistant went to Task Manager > Performance and under the memory tab it said 800MHz. He said this means it's 1333MHz. ...
0
votes
1answer
431 views

Can I install DDR3 1333 RAM into a motherboard that supports DDR3 2200?

Can I install DDR3 1333 MHz RAM into a motherboard that supports DDR3 2200 RAM? I think it should be acceptable, but don't want to risk the investment I've already made on the motherboard For ...
0
votes
2answers
208 views

Does the amount of RAM have an impact on performance?

Can anyone tell me how much difference there would be between a 3 GB DDR3 RAM and a 2 GB DDR3 RAM, performance wise. And can we, based on performance, compare to any DDR2 RAM's
0
votes
1answer
2k views

Do these memtest86 results indicate a defective memory module?

I just ran memtest86 and I received these results (the picture is from the 4th test of the second pass): Obviously something really bad is happening. I guess that red row should not be there. Also ...
0
votes
1answer
3k views

How to check if RAM works in dual-channel mode

A friend of mine arranged three RAM modules of 2GB next to each other on a motherboard that supports dual-channel mode, but is not sure whether it's working. Cpu-z shows only a gray area in the memory ...
0
votes
1answer
137 views

Mixing different RAM voltages and speeds

I have 8 GB of Kingston's DDR3 1333 MHz 1.5 V memory installed in my PC. Can I mix it with Kingston's DDR3 1600 MHz 1.65 V memory? I have an Asus P8P67 Rev. 3.0 motherboard, am I able to overvoltage ...
-1
votes
2answers
430 views

can i merge 4gb of ram at 1333mhz with 4gb of ram at 1600mhz

hi im running 2x2gb of DDR3 ram at 1600mhz for a total of 4gb of ram i am wanting to know if it will be a good idea to install 2x2gb of DDR3 ram at 1333mhz will it just slow down my system or will the ...