DDR3 1600 CAS 7 vs DDR3 2133 CAS 9

ronnysoto

Honorable
Mar 5, 2012
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0
10,510
Hi guys, I'm thinking of buying 4 x 4GB DDR3 kit and I would like you opinion on which one to get. Should I go for a DDR3 1600 CAS 7 or 2133 CAS 9? The PC will be used for gaming and running VMs.

G.SKILL Ripjaws Z Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) - CAS 7

or

G.SKILL Ripjaws Z Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) - CAS 9

Thanks!
 
Welcome to Tom's Forum! :)

Assuming X79/SB-E G.SKILL Ripjaws Z Series DDR3-1600 CAS 7 or maybe CAS 8. Yeah, I know CAS 8 is slower, but I too know it's more stable. On P67/Z68 then defiantly as slower CAS, DDR3-1600 CAS 8 or 9. The gaming won't be affected by 1600 vs 2133, but running VM's requires stability.

Q - Are 32GB in the 'plan'?

Q - What CPU & MOBO?

If Z68/P67 then you might want to consider 4x8GB, but it depends on the load and sizes allotted per VM.
 

ronnysoto

Honorable
Mar 5, 2012
2
0
10,510
Hi Jaquith,

Thanks for the quick reply. Those two kits cost about the same so I'm not sure what's best, bandwidth vs latency?

32GB of RAM is not the plan at the moment.

CPU = Intel i7 2700K
Mobo = GIGABYTE GA-Z68X-UD3H-B3 LGA 1155 Intel Z68

One quick note, the VMs are just for my own studying/testing :)

Thanks again!
 
The G.SKILL Ripjaws Z Series are XMP tuned for the LGA 2011, don't use 1.65v on SB/LGA 1155, and you might want to see this article -> http://www.bit-tech.net/hardware/memory/2011/01/11/the-best-memory-for-sandy-bridge/1

I would save the money and choose one of these kits - http://www.newegg.com/Product/Productcompare.aspx?Submit=ENE&N=100007611%20600006073&IsNodeId=1&page=3&bop=And&CompareItemList=147%7C20-231-478%5E20-231-478-TS%2C20-231-429%5E20-231-429-TS%2C20-233-143%5E20-233-143-TS%2C20-231-442%5E20-231-442-TS%2C20-145-347%5E20-145-347-TS

On the LGA 1155, anything >DDR3-1600 CAS 9 won't do too much and IMO use the savings for a better GPU or SSD. However, if you plan to OC any of the SB 'K' then yes there is some benefits but only when the OC is >4.0GHz~4.5GHz+. Furhter, if you can get the i7-2600K for less then get that instead; both are unlocked and the i7-2700K for a $1 more is a ripoff.

The GA-Z68X-UD3H-B3 is not a good OC'ing MOBO, and with Gigabyte look at the UD5 or UD7 series if available. Otherwise, I recommend either the ASUS ASUS P8Z68-V PRO/GEN3 or ASUS P8Z68-V/GEN3 or EVGA FTW series - http://www.newegg.com/Product/Productcompare.aspx?Submit=ENE&N=100007627%20600093976&IsNodeId=1&bop=And&CompareItemList=280%7C13-131-790%5E13-131-790-TS%2C13-131-792%5E13-131-792-TS%2C13-188-098%5E13-188-098-TS In general, LGA 1155 with 12 Phases to the CPU yields the lowest stable vCore for overclocking.

If OC the SB K >4.2GHz then look at the following, keeping the DRAM voltage 1.50v~1.60v - http://www.newegg.com/Product/Productcompare.aspx?Submit=ENE&N=100007611%2050008476%20600006073&IsNodeId=1&bop=And&CompareItemList=147%7C20-231-473%5E20-231-473-TS%2C20-231-456%5E20-231-456-TS%2C20-233-248%5E20-233-248-TS%2C20-233-256%5E20-233-256-TS%2C20-231-539%5E20-231-539-TS