will there be a problem with putting single 4gb ram with 8 gb?

Soselia

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Jul 12, 2014
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so i have b85m-e motherboard and single 8 GB Kingston DDR3 1600 MHz (KVR16N11/8) installed.
i want to add some more ram but can afford another 8 gb stick so if i buy 1600 MHz 4 gb kingston would i have any issues and what am i loosing?
 
Actually there IS a problem.

You will still be running in SINGLE-CHANNEL mode which causes a slight CPU-Memory bottleneck though it depends a lot on the program used and how fast your CPU is.

The best option is to either get another identical 8GB module, or do nothing.

*Be aware that there's currently no video game that will benefit from more than 8GB of System RAM. Video Editing (not simply converting) and some other demanding software can benefit. So if it's just for video games then another 4GB will likely do nothing.

However, we are back to the possible issue of losing some system performance with only one stick. There's lots of varying opinions even among those who have done lots of testing but all I can say is probably somewhere between 0% and 20% depending on the CPU and task but likely at least SOME performance loss.

(Some confusion exists because with 8GB we often see a lot of that used. Windows always tries to buffer as much as it can, within reason, into the faster System Memory in case you might use it. Mainly programs you've used already. However, if it needs the space such as a video game then it frees up the space to load the game.

Some tools still exist that "FREE" up your system memory to increase performance however they aren't a good ideas as Windows does this already quite efficiently.)
 

Soselia

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Jul 12, 2014
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i have i5 4570.
ok so i have 2 options either buy 4 gb ram of same model or do nothing. my question is : what is better for system windows 8.1 8gb single or 8+4 gb ?

i have another option of buying 8gb of different brand that will be cheaper but i don't think that's a good idea

 

Tradesman1

Legenda in Aeternum
The first thing to consider is simply the adding of DRAM - there is no guarantee anything you pop in will work with the current stick of DRAM, that's why the makers offer such a variety of sets and all the sticks in a set were tested to play nice with each other. Mixing DRAM can be and often is problematic, even another same exact package as what you have, which is why the DRAM manufacturers only guarantee by the packaged set
 

Tradesman1

Legenda in Aeternum
It's similar to CPUs - no two are exactly alike - can take a pair of 4770Ks and one might easily OC to 4.7 at a given voltage on your specific mobo and another may not go higher than 4.4, you might pull ten sticks of DRAM right off the assembly line and only fine 4 that can all play nice together at spec, so you have a 4 sticks set and the rest may end up as 1 or 2 stick sets