G.SKILL launches Extreme Low Latency DDR4-4000 CL15 32GB Memory Kits
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OnnA
This one is very good for Zen 2 😛
3800MHz CL13-14-14-13?
Sylencer
Will defo grab one of the royal kits.
Fediuld
Yep more likely achievable, and ~20% better latency than 3800C16. Which means ~50ns latency.
user1
I wonder if these are using the newer samsung 8gb d-die, if i recall they have 3600mhz bins for those.
nizzen
50ns is not possible.
I'm getting ~61ns with 3900x and 3800c14 1:1 in Aida 64 memory benchmark.
asder
Ryzen == latency :P 😳
Mufflore
This is more like it.
Its been same old for so long, you can buy low CAS ram with low clocks and clock it high with high CAS, or just buy it like that for silly money.
Now there is high speed low CAS, wooo.
Prices will hopefully change all round now and clock this new ram even higher!
Anyone know what brought this around, a newer type of B die or better perhaps?
user1
it could be a high bin of 8Gb b-die , mainly the very high voltage of 1.5v tells its probably nothing particularly new, seems they took some of their 4600-4800 cl 18 kits and clocked them down to 4000 cl 15, which makes sense, since there is very little point in running such high frequencies at the current time on intel and amd.
squalles
but 1.5v can´t cause problems on imc?
user1
1.5v is the dimm voltage, the voltage that touches the cpu will be much lower(<1v typically).
Mufflore
Thanks for that, I missed it is 1.5V. Like you said is probably a high bin.
Oh well, same old.
rl66
frequency Vs latency?
Always chose latency, in this case you have both (despite there is no 64gb kit)
nizzen
frequency means higher bandwidth and lower latency. So high frequency tweaked for low latency is the best 🙂
Atleast for dualchannel setups that lacking bandwidth.
Dazz
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.
user1
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
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 😀
