[SOLVED] Difference between these 2 corsair ram models

[RoyalTwice]

I need to buy a new ram set for my pc and checking my motherboard QVL I found the ram I wanted to buy is not on the list.

The ram that isn't listed is CMK32GX4M2E3200C16 , however the following model is compatible CMK32GX4M2B3200C16 . Since the only difference is 1 letter I would like to know what that means, will it make the ram incompatible? The 2nd model I mentioned is hard to find at my local retailers that's why I'm asking

 

[Lutfij]

Make and model of your motherboard? QVL's are a method of telling the consumer that XYZ ram kit was tested at their lab prior to the launch of the motherboard. In essence any ram kit out there, so long as it conforms to the slots on the motherboard and your platform supports it, will work with your motherboard. If QVL's went to encompass all ram kits out there, the board wouldn't see the light of day(release).

https://www.corsair.com/us/en/Categ...EANCE-LPX/p/CMK32GX4M2B3200C16#tab-tech-specs

VENGEANCE® LPX 32GB (2 x 16GB) DDR4 DRAM 3200MHz C16 Memory Kit - Black

VENGEANCE LPX memory is designed for high-performance overclocking. The heatspreader is made of pure aluminum for faster heat dissipation, and the eight-layer PCB helps manage heat and provides superior overclocking headroom.

www.corsair.com

while maintain the same frequency and voltages, the timings on one is relaxed...the one with 16-18-18-18-38. The other one is tighter but if you look at the compatibility list, the one missing AMD boards is very likely the kit that was launched prior to the Ryzen platform.

You sure you don't have access to G.Skill ram kits?

 

[RoyalTwice]

Make and model of your motherboard? QVL's are a method of telling the consumer that XYZ ram kit was tested at their lab prior to the launch of the motherboard. In essence any ram kit out there, so long as it conforms to the slots on the motherboard and your platform supports it, will work with your motherboard. If QVL's went to encompass all ram kits out there, the board wouldn't see the light of day(release).

https://www.corsair.com/us/en/Categ...EANCE-LPX/p/CMK32GX4M2B3200C16#tab-tech-specs

VENGEANCE® LPX 32GB (2 x 16GB) DDR4 DRAM 3200MHz C16 Memory Kit - Black

VENGEANCE LPX memory is designed for high-performance overclocking. The heatspreader is made of pure aluminum for faster heat dissipation, and the eight-layer PCB helps manage heat and provides superior overclocking headroom.

www.corsair.com

while maintain the same frequency and voltages, the timings on one is relaxed...the one with 16-18-18-18-38. The other one is tighter but if you look at the compatibility list, the one missing AMD boards is very likely the kit that was launched prior to the Ryzen platform.

You sure you don't have access to G.Skill ram kits?

my board is ASUS ROG STRIX Z370-E, I used GSKILL in the past, actually the ram I'm replacing is F4-3600C16D-16GTZR, in the QVL only the version without the R at the end is compatible and I'm guessing it has to do with intel/amd difference since the product description says it's optimized for AMD. The problem I've had with this ram is my pc will only boot correctly when placed onto the A1 and A2 sockets but the manual recommends using A2 and B2 for x2 setups so this time I'm trying corsair to avoid headaches

 

[mamasan2000]

3200 Mhz C16 is pretty much any IC under the sun. Could be the worst of the worst, could be mediocre ships. The best chips are Samsung B-die and those do 3200 Mhz @ 14-14-14. I would stay out of that bracket, personally.
I have never owned an Intel-system but...
A couple of things I would try with existing memory. Enable XMP, raise DRAM voltage to 1.37-1.40 volts. 3600 Mhz might work, I don't know what the 8000-series supports. If 3600 Mhz doesn't work, keep XMP enabled but try 3400 Mhz or even 3200 Mhz. RAM in A2 + B2 should also work.
https://forums.tomshardware.com/threads/8700k-with-ddr4-3600-vccio-vccsa-safe-values.3215281/ VCCIO 1.15V~1.30, VCCSA 1.20V~1.35V.
Go for the lowest values first. 1.15v and 1.2v.
On Asus motherboards I always set CPU and SOC in DIGI-VRM to LLC 3 and 120% current capability. SOC is System On Chip, this is your memory controller or IMC, Integrated Memory Controller. I'm always overclocking CPU so that is why CPU settings are what they are.
LLC on AMD side has 5 values, 1 to 5. 1 is the lowest, the least effective. 5 is for LN2 overclocking, so is probably 4 too. LLC 2-3 is the sweetspot for air/watercooler.

If you are after capacity...I would still go for 3600 Mhz RAM. Just to avoid generic RAM IC chips. If it doesn't work at 3600 Mhz, I would try 3200 Mhz with tighter timings. That would mean if you got 3600 Mhz @ 16-18-18, tighten it to 3200 Mhz @ 14-16-16. Performance should be about the same.

Is this your mobo? https://rog.asus.com/motherboards/rog-strix/rog-strix-z370-e-gaming-model/ It says 4000 Mhz support.