DDR4 vs DDR3

sharonyue · February 5, 2015, 04:29

Hi guys,

Im totally newbie on hardware. but Im wondering is DDR4 rather better than DDR3? DDR4 is fairly expensive than DDR3 now, it is worth the money on it?

If we consider the almost same performance CPU, like 4820k and 5820k.

I want to buy a PC for CFD simulations. If DDR4 is not worth the money I will buy it now. If DDR4 is rather better, maybe I should hold to next year until the price of DDR4 jumps...

Best,

wyldckat · February 7, 2015, 05:29

Greetings sharonyue,

There's a saying... although I don't recall the exact wording, but it goes something like this: "Only those who can afford to lose, are able to afford to win."

This to say that according to what I've briefly found after a bit of Googling, is that the current benefits for DDR4 are mostly on the power-saving side. The performance increase in comparison versus DDR3 at the same clock speed isn't always significant.
On the other hand, there is an increase in memory bandwidth indicated in the latest v3 Xeon processors, which seems to be related to either the use of DDR4 or the ability to handle higher frequencies.

Either way, regarding memory performance, you can draw some ideas from here: http://www.cfd-online.com/Forums/har...tml#post366672 post #17

Best regards,
Bruno

fchan · February 9, 2015, 10:38

There was an interesting article on AnandTech on DDR3 vs DDR4:
http://anandtech.com/show/8959/ddr4-...-and-crucial/8

February 7, 2015, 05:29		#2
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,975 Blog Entries: 45 Rep Power: 128	Greetings sharonyue, There's a saying... although I don't recall the exact wording, but it goes something like this: "Only those who can afford to lose, are able to afford to win." This to say that according to what I've briefly found after a bit of Googling, is that the current benefits for DDR4 are mostly on the power-saving side. The performance increase in comparison versus DDR3 at the same clock speed isn't always significant. On the other hand, there is an increase in memory bandwidth indicated in the latest v3 Xeon processors, which seems to be related to either the use of DDR4 or the ability to handle higher frequencies. Either way, regarding memory performance, you can draw some ideas from here: http://www.cfd-online.com/Forums/har...tml#post366672 post #17 Best regards, Bruno sharonyue and HyperNova like this. Last edited by wyldckat; February 7, 2015 at 08:10. Reason: fixed typo

February 9, 2015, 10:38		#3
fchan New Member Frederik Join Date: Apr 2010 Posts: 18 Rep Power: 16	There was an interesting article on AnandTech on DDR3 vs DDR4: http://anandtech.com/show/8959/ddr4-...-and-crucial/8 wyldckat and sharonyue like this.

February 5, 2015, 04:29	DDR4 vs DDR3	#1
sharonyue Senior Member Dongyue Li Join Date: Jun 2012 Location: Beijing, China Posts: 839 Rep Power: 17	Hi guys, Im totally newbie on hardware. but Im wondering is DDR4 rather better than DDR3? DDR4 is fairly expensive than DDR3 now, it is worth the money on it? If we consider the almost same performance CPU, like 4820k and 5820k. I want to buy a PC for CFD simulations. If DDR4 is not worth the money I will buy it now. If DDR4 is rather better, maybe I should hold to next year until the price of DDR4 jumps... Best,