3 questions about RAM: Unmatched ram, CAS latency 9-9-2009, and please recommend one.

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unitedopinions

Honorable
Apr 19, 2013
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10,510
Hello forum mates,

I have browsed a lot for 'unmatched ram' but I don't think that my exact question is answered yet.

I am building a computer and I'm using Asus B85m-g motherboard (onboard graphics).

1) If I order 2 sticks of exactly the same RAM, which are sold as single sticks and not in pairs, will this amount to 'unmatched ram'? I was considering buying to pieces of this: http://www.flipkart.com/corsair-vengeance-ddr3-4-gb-1-x-gb-pc-ram-cmz4gx3m1a1600c9/p/itmd2rypbx4eehaf?pid=RAMD2RYPMVWCEK6E&otracker=from-search&srno=t_5&query=ram&ref=af1e8f76-35e2-473a-9937-5f01916cace2 instead of ordering this: http://www.flipkart.com/corsair-vengeance-ddr3-8-gb-2-x-4-gb-pc-ram-cmz8gx3m2a1600c9r/p/itmddca5zbuhqesh?pid=RAMDDC9YQNNXFY3H&otracker=from-search&srno=t_28&query=ram&ref=a15da0ae-b875-43f9-87f9-b487eb786df6 because the former will cost me 2990 X 2 = 5980 as compared to the latter for 7700 i.e. more than 20% difference.

2) If you see the specs of the black one it mentions cas latency 9-9-2009. I couldn't get any information about this latency anywhere, what's this?

3) Which one of the above 2 or from these will you recommend? I am trying to build a good PC, but just the same won't be gaming, so don't want any big overkill.
http://www.flipkart.com/g-skill-sniper-ddr3-8-gb-2-x-4-gb-pc-ram-f3-12800cl9d-8gbsr/p/itmd2rysgnzymxvq?pid=RAMD2RYRXMDFERF6&otracker=from-search&srno=t_13&query=ram&ref=91422d7b-d768-41df-9965-75ebb4324f7d

http://www.snapdeal.com/product/gskill-4gb-x-2-ddr3/1379199


Thank you so much for your responses in advance!
 
Solution
Tradesman1
The CL or CAS is the first number of the base timings, i.e. if timiings are 9-10-10-28 that first number, the 9 is the CL, in short, it basically tells you how long it takes the DRAM to complete an action, so the lower the better...Your freq is basically how much DRAM is used during each action, so it's not unusual to see the CLs go up as the freq increases, but if done in stairsteps like say 1600/8 to 1866/9 to 2133/10 each step of both willl provide a performance increase of course going up say from 1866/9 to 2133/9 will provide a bigger increase and on the opposite end going from 1866/8 to say 2133/10 (two steps higher in CL will basically negate the gain from the freq
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swifty_morgan

Illustrious
Feb 10, 2006
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I've purchased sticks individually for the same reason, price. never had problems doing that. you should be okay also.

for ram........... I've been buying Gskill value" type ram in most of my builds. it really doesn't make a lot of difference if it has a fancy heat shield or fancy name. get a fast processor and a fast graphics card.
 
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Tradesman1

Tradesman1

Legenda in Aeternum
Jun 5, 2013
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Yes if the sticks are from different packages it would be 'unmatched' - any time you mix sticks from different packages, there's no guarantee - even with the same exact model....sticks in a package are tested to play nice with each other. The Snipers are very good sticks, good choice ;)
 
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unitedopinions

Honorable
Apr 19, 2013
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Thanks, please can you answer the question about the CAS latency as well? I couldn't find it anywhere else.
 
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Tradesman1

Tradesman1

Legenda in Aeternum
Jun 5, 2013
67,883
40
126,960
The CL or CAS is the first number of the base timings, i.e. if timiings are 9-10-10-28 that first number, the 9 is the CL, in short, it basically tells you how long it takes the DRAM to complete an action, so the lower the better...Your freq is basically how much DRAM is used during each action, so it's not unusual to see the CLs go up as the freq increases, but if done in stairsteps like say 1600/8 to 1866/9 to 2133/10 each step of both willl provide a performance increase of course going up say from 1866/9 to 2133/9 will provide a bigger increase and on the opposite end going from 1866/8 to say 2133/10 (two steps higher in CL will basically negate the gain from the freq
 
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