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1600 vs 1866

post #1 of 15
Thread Starter 
Doing my first build (a super-budget) and ready to order RAM. It's an APU build, so I understand memory is important, but which is better: 8GB of 1600 DDR3 or 4GB of 1866? They're pretty much the same price. At some point, I will be adding a discreet GPU to Crossfire with the APU. Will the 1600 bottleneck it, or how does that even work? Thanks in advance for the help.
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Clever Girl
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post #2 of 15
I highly doubt an APU can saturate 8gb of 1600mhz memory bandwidth; that is a LOT of bandwidth.
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post #3 of 15
46
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post #4 of 15
I wouldn't be so worried about a bottleneck. More so if you will be doing anything that could use more then 4GB of RAM. I find these days while playing a game with utorrent running and a web browser with a couple tabs open pretty much saturates my 4GB or RAM.

8GB might be the better play in that case.
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post #5 of 15
Thread Starter 
So go with the 1866? What about crossfire with another gfx card. That matter at all? Never done it before.

Also, sorry to ask a NoOb question, but what are you using to find out your RAM saturation at a given moment?
Edited by Atreyu5050 - 12/14/11 at 7:20am
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Clever Girl
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post #6 of 15
I cant remember were I read it but I recall correctly the APU really do perform better when faster memory is used. If the 1866 is only a little higher why would u buy slower memory? Always remember higher memory can be down clocked but u have to overclock ur cpu to get higher clocks on lower speed memory.
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post #7 of 15
I don't know what APU is/means, but if the price is the same, go for the 8GB. You will not notice a big difference between 1600 vs 1866MHz. You may not see a big difference between 4GB vs 8GB, but once again: if the price is the same, go for 8GB (future proof for when you really need 8GB tongue.gif)

Be sure to take 2x 2GB and not 4x 1GB
or 2x 4GB and not 4x 2GGB

This is less stressy on the IMC
   
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post #8 of 15
Thread Starter 
@ASUSfreak An APU is a CPU with the GPU built right in (as opposed to it being discreet or integrated into the MoBo). As I understand it, higher memory speeds are important, b/c the Proccesor is doing all the work, but I don't want to run out of RAM, either. Ah, budget builds...
Clever Girl
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Clever Girl
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post #9 of 15
Quote:
Originally Posted by Atreyu5050 View Post

@ASUSfreak An APU is a CPU with the GPU built right in (as opposed to it being discreet or integrated into the MoBo). As I understand it, higher memory speeds are important, b/c the Proccesor is doing all the work, but I don't want to run out of RAM, either. Ah, budget builds...

Honestly the real world difference between 1600 and 1866 will hardly be noticeable if at all. Id go with the 8GB for sure if its the same price.
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Rig
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post #10 of 15
1866. 8 gigs. As I understand it apus love high speed ram, timings are not so important. Crossfiring with another card does work, however the returns aren't so great. I would be interested in seeing what an overclocked apu with 1866 ram did crossfired with a 6670.
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