RAM latency HELP

[Mahbub]

so i am going to purchase ram, i have two options, 

 

1) thermaltake toughram with tested latency of 19-23-23-42

2) G.Skill Ripjaws with tested latency of 18-22-22

                                 

which is better at latency? also why does the g skill has 3 sets of numbers instead of 4 like the thermaltake? whats does the extra "42" in the thermaltake latency suggest? which of these two options is better in terms of latency?

[Haro]

Just now, Mahbub said:

also why does the g skill has 3 sets of numbers instead of 4 like the thermaltake?

Thermal take is showing trac value. 

 

Just now, Mahbub said:

which of these two options is better in terms of latency?

What are they both priced at and what's the frequency of each kit?

[Mahbub]

Just now, TofuHaroto said:

Thermal take is showing trac value. 

 

What are they both priced at and what's the frequency of each kit?

both priced almost same.. thermaltake a lil more due to rgb,, and frequenxy both are 4000mhz 

 

https://mdcomputers.in/g-skill-ripjaws-v-16gb-ddr4-4000mhz-f4-4000c18d-16gvk.html

 

https://mdcomputers.in/thermaltake-memory-toughram-rgb-16gb-ddr4-4000mhz-r009d408gx2-4000c19a.html

[boggy77]

lower latency is better. go for gskill

[Haro]

10 hours ago, Mahbub said:

both priced almost same..

well they're both most likely rev e, they'll perform  similar in the real world. though considering the ripjaws is cheaper and has better timings, i would go for that.

[Mahbub]

1 minute ago, TofuHaroto said:

well they're both most likely rev e, they'll perform  similar in the real world. though considering the ripjaws is cheaper and has better timings, i would go for that.

thanks.. was thinking the same... was confused because the thermaltake had that extra number... m gonna go for gskill.. better latency is more important than rgb

 

1 minute ago, boggy77 said:

lower latency is better. go for gskill

thanks

[Mister Woof]

I already answered you low, the lower number. But okay, make another thread about it.

[butre]

12 minutes ago, Mahbub said:

both priced almost same.. thermaltake a lil more due to rgb,, and frequenxy both are 4000mhz 

 

https://mdcomputers.in/g-skill-ripjaws-v-16gb-ddr4-4000mhz-f4-4000c18d-16gvk.html

 

https://mdcomputers.in/thermaltake-memory-toughram-rgb-16gb-ddr4-4000mhz-r009d408gx2-4000c19a.html

what cpu are you running?  if it's ryzen using ddr4 4000 will screw you

[Haro]

10 hours ago, butre said:

if it's ryzen using ddr4 4000 will screw you

OP is running an 8600k.

[Mahbub]

8 minutes ago, Mister Woof said:

I already answered you low, the lower number. But okay, make another thread about it.

hey one last question.... i saw that the latency numbers are even lower on the 3200 mhz, so like which shud i go for 3200 with low latency or 4000 with higher latency?

[Mister Woof]

6 minutes ago, Mahbub said:

hey one last question.... i saw that the latency numbers are even lower on the 3200 mhz, so like which shud i go for 3200 with low latency or 4000 with higher latency?

Explains concept:

 

https://www.crucial.com/articles/about-memory/difference-between-speed-and-latency

 

I'd say the 3200 lower latency because there's no guarantee your IMC will like 4000mhz RAM anyway, and the 3200mhz is cheaper and will work.

[Mateyyy]

9 minutes ago, Mahbub said:

hey one last question.... i saw that the latency numbers are even lower on the 3200 mhz, so like which shud i go for 3200 with low latency or 4000 with higher latency?

If it's 3200 CL14 go for it, otherwise don't.

[Mahbub]

6 minutes ago, Mateyyy said:

If it's 3200 CL14 go for it, otherwise don't.

Whats cl14, i am a total noob at ram..

[Mahbub]

8 minutes ago, Mateyyy said:

If it's 3200 CL14 go for it, otherwise don't.

It says 16 20 20 38 on the 3200

[Mateyyy]

3 minutes ago, Mahbub said:

Whats cl14, i am a total noob at ram..

That's CAS latency. What you mentioned in your original post (18-22-22-etc.) are timings, specifically the primary timings of the memory. Lower/tighter timings = better, higher frequency (3200, 3600, 4000, etc.) = better. 

1 minute ago, Mahbub said:

It says 16 20 20 38 on the 3200

That's junk, either of the 4000MHz kits you mentioned is better.

[Mahbub]

Just now, Mateyyy said:

That's CAS latency. What you mentioned in your original post (18-22-22-etc.) are timings, specifically the primary timings of the memory. Lower/tighter timings = better, higher frequency (3200, 3600, 4000, etc.) = better. 

That's junk, either of the 4000MHz kits you mentioned is better.

Okk but the 4000 has even more latency.. so those also junk?

[Mateyyy]

1 minute ago, Mahbub said:

Okk but the 4000 has even more latency.. so those also junk?

No, it's got looser timings, not a higher latency. Selecting frequency and timings is a balancing act to get the best latency.

 

Speaking of latency, you can calculate the access latency of memory using either calculators online (like this one: https://notkyon.moe/ram-latency.htm) or by calculating it yourself with a simple formula.

 

For instance, just so you understand why those two 4000MHz kits are better than this 3200 kit:

3200MHz CL14 = 8.75ns latency

4000MHz CL18 = 9ns latency

4000MHz CL19 = 9.5ns latency

3200MHz CL16 = 10ns latency

The reason I said that 3200 kit was junk is that the other primary timings (20-20-38) were super loose for a 3200MHz kit, meaning it's most likely using bottom of the barrel DRAM.

[Mahbub]

1 minute ago, Mateyyy said:

No, it's got looser timings, not a higher latency. Selecting frequency and timings is a balancing act to get the best latency.

 

Speaking of latency, you can calculate the access latency of memory using either calculators online (like this one: https://notkyon.moe/ram-latency.htm) or by calculating it yourself with a simple formula.

 

For instance, just so you understand why those two 4000MHz kits are better than this 3200 kit:

3200MHz CL14 = 8.75ns latency

4000MHz CL18 = 9ns latency

4000MHz CL19 = 9.5ns latency

3200MHz CL16 = 10ns latency

The reason I said that 3200 kit was junk is that the other primary timings (20-20-38) were super loose for a 3200MHz kit, meaning it's most likely using bottom of the barrel DRAM.

well then decision taken.. m going for the 4000 mhz