is this $470 Built good?.
Dual channel is better than single channel, and Dual Rank is better than Single Rank (unless you're going for overclocking)
4 GB sticks are always Single Rank because they don't make those tiny memory chips on the stick in small enough capacity to make a Dual Rank stick that's only 4 GB
They make 4 gbps ( 512 MB) , 8 gbps (1 GB) and 16 gbps (2 GB) chips, and each stick needs a multiple of 8 chips to work, so you make a 4 GB stick with 8 x 512 MB chips.
Probably 70% or so of 8 GB sticks are Dual Rank , and pretty much all 16 GB sticks are Dual Rank
Dual Rank doesn't have as much benefit as Dual Channel, let's just say that in some applications or games you may get 5-10% performance bonus if you use Dual Rank sticks instead of Single Rank sticks. You don't have to stress about it.
Dual channel doubles the bandwidth between the processor (and therefore the integrated graphics) and the memory, so it's always good to have Dual Channel if you use integrated graphics. BUT you have to remember that you can always ADD more memory sticks, so if your budget is very tight now but can find a bit more money to buy a second stick later (in a month or two, at next paycheck), it may make more sense to buy just one stick now and allocate a larger percent of your budget to a part you are unlikely to change so easily, like your motherboard, or your SSD.
You can use the computer with just one stick, and when you have the money you can buy the 2nd stick and simply plug it in and you have Dual channel mode and double the memory amount.
Yes, 3600 Mhz memory sticks would be better if you use integrated graphics, but the performance difference between 3200 Mhz and 3600 Mhz is not that big ... think of it like having 35 fps with 3200 Mhz sticks and 37 fps with 3600 Mhz ... you'll get a couple extra fps. Up to you if the price difference makes it worth it.
Dual channel vs Single channel will be a bigger hit ... like 35 fps with dual channel versus 25 fps for Single channel but again, it's temporary, the moment you install the second stick your fps goes up.
With SSD, you will definitely notice a difference between a 120-128 GB SSD and a 250 GB one.
A 120 GB SSD will barely be enough for the operating system and maybe some small game but a 250 GB SSD will offer more space ..
Also it's recommended and a good idea to always have at least around 10% of the capacity free, otherwise a SSD will work slower and degrade faster than normal.. so with a 120 GB SSD, you're looking at 40-50 GB just for Windows, around 10-15 GB free space ... you'll be left with around 40-50 GB available for programs and games, too little.
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