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6 Stick question

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a b } Memory
November 23, 2010 2:53:15 PM

I have a Core i7 920 with currently 6GB (3X2GB) of memory. I want to move on up to 12GB, but I don't know what adding 3 more sticks will do to my latency. I remember that original DDR had horrid effects with adding a second stick to a channel. it would lose ~40% of the bandwidth due to latency increases. DDR2 wasn't too bad, and would only lose about 5-10%. How is DDR3 for dual sticks per channel? Am I that much better off to get a 3X4GB bundle and ditch the existing 3X2GB bundle?

(The extra 3X2GB bundle is $115 http://www.newegg.com/Product/Product.aspx?Item=N82E168... for the exact same memory, while an updated 3X4GB bundle is now $270 http://www.newegg.com/Product/Product.aspx?Item=N82E168... )

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a c 347 } Memory
November 23, 2010 3:25:26 PM

Those 'problems' seem more like mix-match or compatibility issues. Yes, Tri Channel performs 'better' but it will only show-up in a bench; {Ch 0 -> Ch 1 -> Ch 0 -> etc}. I don't recommend either of those sets, but I need to know the following so i can...

Please post the following:
1. MOBO
2. Current RAM ; Q - is this the 'current' RAM -> TR3X6G1600C9
3. Any OC'ing?

Q - What Apps are you running 'needing' 12GB?
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a b } Memory
November 23, 2010 4:53:14 PM

1. Asus P6T
2. current RAM is the same as the 6GB set I linked
3. OC to 3.3Ghz right now. I don't need much for WoW, and that's the most processor intensive item I run on a regular basis.

the plan is to make a 4GB ram drive where I'd put my temp files, which wipe on reboot. (Currently, the temp files are going to a SSD, which is fast, but the temp files stick around, and I'd rather be able to just wipe them all with a reboot.) Then I'd have 8GB usable memory for keeping the performance up when my backup program runs. Stupid Nero BackItUp takes a huge amount of memory when it runs, and by default it runs every 2 hours.
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a c 347 } Memory
November 23, 2010 6:39:14 PM



Windows 7 -> Nero BackItUp & Burn (as of version 1.2.17)
Nero BackItUp & Burn -> use incremental Backup option {I don't use this software}

Sure I can help you spend your $, but something is WAY WRONG with your backup software.

I would simply get a second set of TR3X6G1600C9.

Otherwise Corsair Tested - http://www.corsair.com/configurator/product_results.asp...

CORSAIR DOMINATOR 12GB (3 x 4GB) DDR3 1600 (PC3 12800) CMP12GX3M3A1600C9 http://www.newegg.com/Product/Product.aspx?Item=N82E168...


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a b } Memory
November 23, 2010 9:08:40 PM

and that won't hurt performance too much? I know command rate would increase, but does that hurt DDR3 performance?
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a c 347 } Memory
November 23, 2010 9:22:57 PM

A loss of a few billionths of a second, no doubt. I would look first at either fixing or replacing the Nero BackItUp before spending $270 to fix maybe a free solution. The Incremental makes more sense and will cause LESS Write errors.

I have 10 rigs all with 6GB of TR3X6G1600C8D and IF and when I need an upgrade I will not go the 3X4GB 'after-the-fact' -- I'm trying to help you verses greasing-up your wallet so the money will fall out.

The difference between CAS 7 and CAS 8 is 1/1,000,000,000 second the switching may be the same as going from CAS 7 -> CAS 8.

Benchmarks {Since you OC look at the OC graphs}
Comparison Module #1: Mushkin Redline 996805 6-8-6-24 1600MHz
Comparison Module #2: G.Skill Pi Series 7-8-7-24 1600MHz
Comparison Module #3: Mushkin 998687 8-9-8-24 1866MHz
Comparison Module #4: Corsair Dominator TR3X6G1600C8D 8-8-8-24 1600MHz
Comparison Module #5: Kingston HyperX T1 9-9-9-27 1600MHz
Comparison Module #6: Mushkin Blackline 998677B 7-7-7-20 1333MHz
Comparison Module #7: Patriot Viper II Sector 7 9-9-9-27 1800MHz



Stock:
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a b } Memory
November 23, 2010 9:26:14 PM

cool. I'll be putting in the order for that memory as soon as I get my next paycheck. :) 

Thanks.
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a b } Memory
November 23, 2010 9:26:31 PM

Best answer selected by dgingeri.
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a c 347 } Memory
November 23, 2010 9:42:36 PM

dgingeri said:
Best answer selected by dgingeri.

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nTHANKS! Your Best Answer pushed me to Gold! :sol: 
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a b } Memory
December 15, 2010 9:53:21 PM

After the upgrade and extensive testing and playing, this was not the best choice. I lost roughly 15% performance in WoW from this configuration, and boot time increased by 8 seconds. Everything else I run had little/no performance difference.

For WoW, don't go with a 6 DIMM config. Stick with 3 DIMMs only! Even increasing my overclocking to 3.67GHz didn't offset the difference in performance.
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