adding further matched pairs of DDR3, same timings higher capacity

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Steamy Wee

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Jun 23, 2015
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Everyone says BAD idea....It Won't work.
But no one will be specific about the consequences.

WHAT won't work?
Will my MoBo explode?
Will any memory at all be detected and work?
WHAT WILL HAPPEN WHEN I BOOT UP AFTER ADDING?:bounce:
 
Solution
AdviserKulikov


Should be fine, the only situation I could think of would be if you decided to use DDR2 and...
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AdviserKulikov

AdviserKulikov

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Jan 13, 2015
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Mismatched capacity sticks CAN work together, they just have a lower rate of pairing successfully. Memory controllers used to be much more picky, so the combination of older motherboard and different stick behaviors could see problems. Now memory upgrades are very common and motherboard manufacturers recognize that users like the value of being able to keep their old RAM and only buying half as much new RAM.

If it doesn't work, just take out the old sticks. Worst case scenario it doesn't like the old pair working with the new one at all, best case it works fine and there's no need for the controller to limit either pair's performance.

Your motherboard will not explode.
 
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Steamy Wee

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Jun 23, 2015
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4,510

Thanks for giving me a clear and lucid answer, much appreciated.
On that basis I will try adding the extra memory, I'm happy enough to end up with just 4GB which would be a 100% incerase and more than adequate for my needs, I just wanted not to waste the original 2GB if at all possible.:)
These are details of my MoBo , existing and proposed additional RAM.
...just in case you can see any obvious problem or offer any further advice.
Thanks again.
Asus P5Q3 Deluxe WIFI-AP iP45 Socket 775 Motherboard
Corsair 2Gb PC3-10666 TwinX (2 x 1GB)
Corsair TW3X4G1333C9A XMS3 4GB (2x2GB) DDR3 1333 Mhz CL9 Performance Desktop Memory Kit
Just noticed, Dropbox seems to be somewhat lacking in it's ability to correctly display PDF's, the red gobbldygook at the bottom of the last link should read:-
This is the additional RAM I was considering,
I think it's the closest available to the existing. (visually!)
 
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AdviserKulikov

AdviserKulikov

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Jan 13, 2015
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Should be fine, the only situation I could think of would be if you decided to use DDR2 and DDR3 on the same board (some boards had slots for both) in which case it is impossible to run both at the same time.
 
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Solution
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Steamy Wee

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Jun 23, 2015
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4,510


Just noticed that on the data for my existing RAM, it says:-
"•Tested together at 1333MHz, Vdimm = 1.70V, at latency settings of 9-9-9-24"
One point seven volts? :??:

 
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