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Memory mhz vs timing which to sacrifice?

post #1 of 29
Thread Starter 
Was wondering if it would be better to get tighter timing on RAM for AM3 instead of greater mhz. Was planning on using in MSI 890FXA-GD70 with 1090T. I'm not quite certain how voltage effects RAM there is a version of the tighter timed RAM with higher voltage.

Mushkin Enhanced Blackline 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333
Newegg
with timing of 7-7-7-20 and mhz of 1333, 1.5V - 1.65V, $109.99

or

Mushkin Enhanced Blackline 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333
NewEgg
With timing 7-7-7-20 mhz 1333 and 1.7V - 1.8V, $119.99

or

Mushkin Enhanced Ridgeback 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model 996826 Newegg
With timing 6-8-6-24 and mhz of 1600 1.65V, $129.99
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post #2 of 29
Personally, I shy away from any DDR3 module that has a suggested voltage of more than 1.65v (the standard upper limit for DDR3).

Of the modules you have listed, the 996826 is the best purchase at CAS6 1600mhz (speed AND low latency). In the long run, the $20 over the DDR 1333 will be well worth it when it retains its value and the other chips don't.

And of course, all Mushkin parts are backed by a fantastic warranty service.
Edited by ChronoTrigger - 7/26/10 at 7:31am
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post #3 of 29
between the first two, i would choose the 1.5v one as you would have more voltage head room for overclocking. between the first and last one, the last one is better. higher frequency with lower timings. doesnt seem like your skimping on board or cpu, dont skimp on ram either then.
post #4 of 29
amd seems to work better with tight timings than high mhz. at least in my experience
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post #5 of 29
As far as I heard it, AMD systems prefer fast speeds, Intel setups do best with faster timings. Or I could be getting it the wrong way around?
    
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post #6 of 29
Quote:
Originally Posted by allikat View Post
As far as I heard it, AMD systems prefer fast speeds, Intel setups do best with faster timings. Or I could be getting it the wrong way around?
Other way around I'm pretty sure.
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post #7 of 29
Quote:
Originally Posted by allikat View Post
As far as I heard it, AMD systems prefer fast speeds, Intel setups do best with faster timings. Or I could be getting it the wrong way around?
I'm pretty sure this is correct - AMD chips are more bandwidth-starved than intel chips and thus respond a bit more to speed increases than latency decreases, though both will have a small effect.

But since you have a choice that wins in both categories and didn't explicitly state that it's too expensive (btw it's much cheaper than that same part used to be), you have a clear winner in choice #3.
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post #8 of 29
I have heard that timings are more important, but so is speed. aka low timings are worthless without fast speed, but also the other way around, so find some with a nice balance. There are mushkins that have CAS 6 (the first number) and 1600MHZ that i have and am happy with. (6-8-6-24 1.65v 1600MHz) Oh duh, just noticed that was your bottom choice, doy.

As for voltages, it helps the memory with the higher speeds, i talked to mushkin sean, and the specified voltage is enough to achieve the stock speeds, but higher might help with overclocking, but i noticed that my Ridgebacks get 'warm' not hot in any means, just warm, so i have no desire to push them past the stock, since they are great as far as i can tell.

If you have the money for it, go for the ridgeback since it has both, and you will benefit from that, otherwise go for the first one you listed, since it has lower volts and the same specs as the second one.
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post #9 of 29
Thread Starter 
I just located something interesting that may swing my vote...

Mushkin has announced AM3 memory Kits
http://www.pcgameshardware.com/aid,6...ory-kits/News/

Mushkin 4 GB (2 X 2GB) DDR3 1600 Mhz Blackline Frostbyte Dual Channel 7-7-6-18 AM3 Edition 996601AM3
AdvantiOnline
with timing of 7-7-6-18 mhz 1600, 1.85V - 1.95V ( high voltage ... ) $172.25

Mushkin Enhanced Blackline Frostbyte 4 GB Desktop Memory 996657
Amazon
with timing of 7-7-7-20 mhz 1600, 1.85v - 1.95V ( again high voltage ... ) $250.00

Mushkin HP 4GB (2 x 2GB) 240-Pin DDR3 1600 (PC3 12800) Dual Channel Kit Memory Model 996659AM3
AdvantiOnline
with timing 9-9-9-27 mhz 1600, 1.5V - 1.7V $145.75


The voltages seem to be a tad high though 1.65V all the way up to 1.95V

Choice three from my initial posting states that "Work with Intel LGA 1156 processors" ... A customer reviewed and stated that it doesn't work optimally on AM3 and may not run at advertised speeds. So I googled it and came up with http://forums.mushkin.com/phpbb2/vie...hp?f=3&t=17004 which confirmed that "This kit rated for use on Intel 1156, it will work on AM3, but you will not likely get rated timings. "
Edited by Midgetwithamatch - 7/26/10 at 7:59am
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post #10 of 29
I got my g skill ripjaws down to 7-7-7-20 @ 1600 from 9-9-9-24...so I believe thats just about as good as you can get

edit: theres also the possibility that I could get them lower..
 
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