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G.SKILL launches Extreme Low Latency DDR4-4000 CL15 32GB Memory Kits
G.SKILL is releasing an extreme low-latency, high-speed DDR4 memory kit at DDR4-4000 CL15-16-16-36 in a 32 GB (8 GB x4) capacity configuration under the classic Trident Z and the RGB-enabled Trident Z Royal memory series.
Once again, these extraordinary memory kits are manufactured using high-performance Samsung B-die ICs to achieve the world's lowest latency of CL15 at DDR4-4000. At G.SKILL, we are always searching for the ultimate memory kit, tuned not only for speed, but also for efficiency. This means pushing for lower latency timings. Previously, the best CAS latency that memory kits at the DDR4-4000 level could achieve was at CL17. This is surpassed by the new DDR4-4000 CL15-16-16-36 32 GB (8 GB x4) memory kit running under 1.5 V, shown validated on the MSI MEG Z390 ACE motherboard and Intel Core i7-9700K processor in the screenshot below.
Exceptional Bandwidth Performance on AMD X570
A lower CAS latency typically means a bump in bandwidth performance, and this is no different on the latest AMD Ryzen platform. Normally, AMD Ryzen 9 3900X processor bandwidth with popular DDR4-3200 CL14 kit would fall around 50 GB/s for memory read bandwidth in AIDA64. With the new ultra-efficient DDR4-4000 CL15 memory kit, the memory read bandwidth breaks 61 GB/s in AIDA64 with a few additional tweaks, along with over 58 GB/s in memory write and 65 GB/s in memory copy bandwidth speed, as demonstrated in the following screenshot with the MSI X570 Unify motherboard and the AMD Ryzen 9 3900X processor.
Availability & XMP 2.0 Support
This extreme low latency performance memory specification will support Intel XMP 2.0 for easy overclocking and will be available via G.SKILL worldwide distribution partners in Q4 2019.
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user1
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Senior Member
Posts: 2074
Joined: 2016-01-29
#5722452 Posted on: 10/21/2019 03:42 AM
You can calculate the equivalent rated frequency/Mt/s for a given true latency and cas
(1000/(8.75ns/cas))*2=(megatransfers/rated mhz ) so in this case for cl 14 its 3200mt/s , cl 17 its 3886mt/s and for cl19 its 4343mt/s it ect
if you want a memory kit with latency equivalent to say a 3200 cas 14 kit at a higher frequency, this can be useful for avoiding not so great kits, like 4000 cl19 .
You can calculate the equivalent rated frequency/Mt/s for a given true latency and cas
(1000/(8.75ns/cas))*2=(megatransfers/rated mhz ) so in this case for cl 14 its 3200mt/s , cl 17 its 3886mt/s and for cl19 its 4343mt/s it ect
if you want a memory kit with latency equivalent to say a 3200 cas 14 kit at a higher frequency, this can be useful for avoiding not so great kits, like 4000 cl19 .
nizzen
Senior Member
Posts: 2087
Joined: 2005-08-05
Senior Member
Posts: 2087
Joined: 2005-08-05
#5722551 Posted on: 10/21/2019 12:28 PM
You can calculate the equivalent rated frequency/Mt/s for a given true latency and cas
(1000/(8.75ns/cas))*2=(megatransfers/rated mhz ) so in this case for cl 14 its 3200mt/s , cl 17 its 3886mt/s and for cl19 its 4343mt/s it ect
if you want a memory kit with latency equivalent to say a 3200 cas 14 kit at a higher frequency, this can be useful for avoiding not so great kits, like 4000 cl19 .
What we do is overclocking b-die memory. Tweaking 2. and 3. Timings too.
3200c14 and 3600c15 is often the best bins, and overclocks like crazy
You can calculate the equivalent rated frequency/Mt/s for a given true latency and cas
(1000/(8.75ns/cas))*2=(megatransfers/rated mhz ) so in this case for cl 14 its 3200mt/s , cl 17 its 3886mt/s and for cl19 its 4343mt/s it ect
if you want a memory kit with latency equivalent to say a 3200 cas 14 kit at a higher frequency, this can be useful for avoiding not so great kits, like 4000 cl19 .
What we do is overclocking b-die memory. Tweaking 2. and 3. Timings too.
3200c14 and 3600c15 is often the best bins, and overclocks like crazy
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Senior Member
Posts: 986
Joined: 2001-08-12
frequency means higher bandwidth and lower latency. So high frequency tweaked for low latency is the best
Atleast for dualchannel setups that lacking bandwidth.
Depends on what you do really, games are incredibly latency dependant compared to that of other applications, while true increasing the speed of the memory does reduce latency but it's very very small with the biggest performance coming from increased bandwidth which games do not normally care about but how quick it can fetch data and this is where CAS timing play a far bigger role.
In games 3200CL14 is faster than 3800 CL18, now with Ryzen 3000 quad ranked is faster than single and dual ranked which is not sometime we see with dual channel setups but performance is increased when going to 4 DIMM slots filed assuming the memory used is single ranked i.e Samsung B dies are normally single ranked. But high capacity memory can be dual ranked on a single stick, 16GB DIMMs will most likely be dual ranked to begin with.