If you thought the DDR4-3000 kit was excessive, meet Corsair's Vengeance LPX DDR4-4000

Subject: Memory | February 1, 2016 - 05:38 PM |
Tagged: ddr4-4000, corsair, Corsair Vengeance LPX

That is no typo, the 8GB Corsair Vengeance LPX kit which Hardware Canucks just reviewed is indeed 4000MHz effective at timings of 19-23-23-45.  The small size of the dual channel kit helps keep the MSRP to $225, affordable for what it is and not removing the purchase of a second kit from the realms of possibility.  However the question of performance remains, does a DDR4-4000 kit provide noticeable performance improvements or is it simply good for bragging rights for those few with a motherboard that can support it?  The results vary, especially when looking at memory timings and CPU overclocks compatible with the memory frequency however it was also clear that this memory could probably go faster ... if you had components that were capable of reaching those frequencies.

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"The Corsair Vengeance LPX DDR4-4000 is one of the fastest, highest performance memory kits around but with a capacity of just 8GB, will it be enough for today's applications? "

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February 1, 2016 | 06:06 PM - Posted by willmore

The only thing excessive about it was the price. More faster memory is a good thing. More expensive memory, not so much.

February 1, 2016 | 06:17 PM - Posted by Clench (not verified)

You comment and grammatically and conceptually incorrect.

February 1, 2016 | 06:40 PM - Posted by Anonymous (not verified)

You might want to check your own grammar before commenting on someone else bro.

February 1, 2016 | 06:16 PM - Posted by Clench (not verified)

But doesn't than mean 45ms latency? Isn't that about 50% higher than most RAM. How will that affect performance when talking about consumer end use, which, for this, will probably be 1080 60FPS streaming of something like Fallout 4 on Ultra.

February 1, 2016 | 06:26 PM - Posted by Jeremy Hellstrom

Check out the comments in this one for a good way to do the math.

http://www.pcper.com/news/Memory/Driving-your-RAM-36GHz#comments

If you are playing 1080p @ 60Hz refresh, you don't need this RAM.

February 2, 2016 | 09:31 AM - Posted by YTech

Further details about the RAM timing can be found here :
http://www.hardwaresecrets.com/understanding-ram-timings/

February 1, 2016 | 09:34 PM - Posted by willmore

Using the timings from the wikipedia page for the JEDEC DDR4 standard and the timings of this memory, I whipped up this table: (well, I had a nice table, but the code tag compressed whitespace which messed up the formatting. Then I tried the pre tag and it didn't preserve indenting. Then I tried it as a simple html table and that just seemed to get stripped out. I give up PCPER)

DDR4-1600 @ 11 cycles is 6.875 ns

DDR4-1866 @ 13 cycles is 6.964 ns

DDR4-2133 @ 15 cycles is 7.031 ns

DDR4-4000 @ 19 cycles is 4.75 ns 23 cycles is 5.75 ns

So, no, it's lower latency.

February 2, 2016 | 03:16 AM - Posted by Tim Verry
willmore's memory latency table
Memory Speed (MHz) # of cycles Latency
DDR4-1600 11 6.875 ns
DDR4-1866 13 6.964 ns
DDR4-2133 15 7.031 ns
DDR4-4000 19 4.75 ns
DDR4-4000 23 5.75 ns

 

Do you have an option under the text input box to choose the input format? I think you have to select Full HTML for tables to work, let's see if this does it...

February 2, 2016 | 08:25 AM - Posted by willmore

I don't have that. I have a short description of formatting options, then a link to the page with more descriptions, then the Mollom privacy policy, and finally the submit button.

Maybe it's a staff thing? Thanks for formatting it so nicely! If I could dump HTML in here, that would be great. I could just export the original spreadsheet as HTML and paste it in!

February 2, 2016 | 02:53 PM - Posted by Tim Verry

Ah, yeah it might be a security thing so that commentors can't put in code. Sorry about that!

February 2, 2016 | 03:42 PM - Posted by Jeremy Hellstrom

Ya, it is just another way we are special ;)

February 2, 2016 | 03:47 PM - Posted by willmore

In the future, I'll just email my html to you guys. :) Or you could mark me as trusted. ;)

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