Question DDR5 ram kits for AMD 7800x3d cl28-5600mhz or cl30-6000mhz? (G.Skill Trident Z5 Neo AMD EXPO)

[stoned34FR]

Hello
I am building my new pc in AM5
CPU: 7800x3d
MOBO: ASUS ROG STRIX B650E-E

But I really don't know what will be better between cl28- 5600mhz(2x16gb) or cl30- 6000mhz (2x16gb) for gaming

I just saw Buildzoid's video and the tuned 5600-CL28 fared a bit better overall but on non x3d cpu, (link of the video

View: https://www.youtube.com/watch?v=MOatIQuQo3s
)
but knowing that I am an amateur and that I do not want to manually customize the rams, and my cpu is the 7800x3d
If would only like to use the expo mode and not manually custom the rams which rams will be the best for gaming?
the link of the kits :
cl28: https://www.amazon.de/-/en/gp/product/B0BFC5WDJ6
cl30: https://www.amazon.de/-/en/gp/product/B0BFCV7JZ8

(knowing that I can have the 2 kits for exactly the same price so the price does not matter)


thank you in advance for your help because I'm really stuck

 

[Lutfij]

Welcome to the forums, newcomer!

You might want to avoid Asus motherboard's due to the BIOS issue and how they pump more power than necessary to the chip. If you're going for higher frequency ram kits, look at a tight latency as opposed to a higher latency number.

Out of those two kits, I'd pick the DDR5-6000MHz ram kit and see if you can get the latency a little lower but you will need to go through a process of trial and error(tinkering). Outside of that either kits will work fine for AM5.

 

[stoned34FR]

Welcome to the forums, newcomer!

You might want to avoid Asus motherboard's due to the BIOS issue and how they pump more power than necessary to the chip. If you're going for higher frequency ram kits, look at a tight latency as opposed to a higher latency number.

Out of those two kits, I'd pick the DDR5-6000MHz ram kit and see if you can get the latency a little lower but you will need to go through a process of trial and error(tinkering). Outside of that either kits will work fine for AM5.

thank you very much for your quick response

But I thought it did not come only from asus and that there had been an update of the bios?
And therefore the best choice of ram for a 7800x3d would be cl30 in 6000 mhz rather than cl28 in5600mhz?

and if not that it will be the best ram kit with EXPO profile for the 7800x3d below 200euro/usd?

 

[CeltPC]

thank you very much for your quick response

But I thought it did not come only from asus and that there had been an update of the bios?
And therefore the best choice of ram for a 7800x3d would be cl30 in 6000 mhz rather than cl28 in5600mhz?

and if not that it will be the best ram kit with EXPO profile for the 7800x3d below 200euro/usd?

I think you are on the right track. In my recent build I went with those G.Skill F5-6000J3038F16GX2-TZ5N sticks and they have worked fine. With the recent price drops, they are a steal IMOP. I am running them with the "EXPO Tweaked" setting with no hiccups at all, including memory tests.

And you are also correct that the issues of late with some Ryzen 7000 series CPU's has not been exclusive to Asus. They have been quite speedy in working with AMD to get fixes out. For a person such as yourself who does not want to do a lot of manual tweaking, setting EXPO, and then the Asus AI Overclock option is very easy and tunes your rig to perform at an excellent level in both single and multi-threaded workloads..

 

[IDProG]

Hello
I am building my new pc in AM5
CPU: 7800x3d
MOBO: ASUS ROG STRIX B650E-E

But I really don't know what will be better between cl28- 5600mhz(2x16gb) or cl30- 6000mhz (2x16gb) for gaming

I just saw Buildzoid's video and the tuned 5600-CL28 fared a bit better overall but on non x3d cpu, (link of the video

View: https://www.youtube.com/watch?v=MOatIQuQo3s
)
but knowing that I am an amateur and that I do not want to manually customize the rams, and my cpu is the 7800x3d
If would only like to use the expo mode and not manually custom the rams which rams will be the best for gaming?
the link of the kits :
cl28: https://www.amazon.de/-/en/gp/product/B0BFC5WDJ6
cl30: https://www.amazon.de/-/en/gp/product/B0BFCV7JZ8

(knowing that I can have the 2 kits for exactly the same price so the price does not matter)


thank you in advance for your help because I'm really stuck

The first RAM sticks are most likely Samsung and not SK Hynix.
The second RAM sticks are most likely SK Hynix.
IMO, choose the second one.

AMD recommends 6000MHz RAM for Ryzen 7000.

AMD Confirms DDR5-6000 RAM Is The Sweet Spot For Ryzen 7000 CPUs

Directly from the horse's mouth

www.tomshardware.com

thank you very much for your quick response

But I thought it did not come only from asus and that there had been an update of the bios?
And therefore the best choice of ram for a 7800x3d would be cl30 in 6000 mhz rather than cl28 in5600mhz?

and if not that it will be the best ram kit with EXPO profile for the 7800x3d below 200euro/usd?

Do not underestimate the issue. It is a MAJOR issue. It can lead to your CPU's permanent death, and I THINK (correct me if I'm wrong) the damage is not covered by the warranty.

If you have already bought the motherboard, make absolute sure you have the motherboard's BIOS updated before installing the CPU. Use BIOS flashback if it supports it or find someone with a Ryzen 7000 non-3D to help you update the BIOS.

 

[CeltPC]

I

The first RAM sticks are most likely Samsung and not SK Hynix.
The second RAM sticks are most likely SK Hynix.
IMO, choose the second one.

AMD recommends 6000MHz RAM for Ryzen 7000.

AMD Confirms DDR5-6000 RAM Is The Sweet Spot For Ryzen 7000 CPUs

Directly from the horse's mouth

www.tomshardware.com

Do not underestimate the issue. It is a MAJOR issue. It can lead to your CPU's permanent death, and I THINK (correct me if I'm wrong) the damage is not covered by the warranty.

If you have already bought the motherboard, make absolute sure you have the motherboard's BIOS updated before installing the CPU. Use BIOS flashback if it supports it or find someone with a Ryzen 7000 non-3D to help you update the BIOS.

I have not heard of anyone being stranded on a failed part, would you please cite an instance where the vendor or AMD did not back the customer with a return or replacement? That would be most disconcerting and something I would be very surprised to see from them.

 

[IDProG]

I have not heard of anyone being stranded on a failed part, would you please cite an instance where the vendor or AMD did not back the customer with a return or replacement? That would be most disconcerting and something I would be very surprised to see from them.

I actually found one.

Here's a quote from someone who was a victim to this:
"After speaking with ASUS, it was brought to my attention that this technically isn't warrantied with AMD due to the use of EXPO."
Source: https://wccftech.com/amd-ryzen-7-7800x3d-cpu-burns-up-kills-itself-the-asus-x670-motherboard

 

[CeltPC]

I actually found one.

Here's a quote from someone who was a victim to this:
"After speaking with ASUS, it was brought to my attention that this technically isn't warrantied with AMD due to the use of EXPO."
Source: https://wccftech.com/amd-ryzen-7-7800x3d-cpu-burns-up-kills-itself-the-asus-x670-motherboard

Sorry but they did NOT strand the customer at all! Here is what he said about it:

"AMD was quick to respond and provide a pre-paid shipping label for the RMA. I also heard from ASUS a little latter, who also offered replacements. It just came a little to late as to reduce downtime and for some stellar analysis content I had already sent them off to Steve. 🙏 Bless. No shade to ASUS though, It's only been 1 business day and this occurred end of week. Both AMD and ASUS have done a fantastic job in trying to make this right. I do feel for AMD and ASUS here as they did request that the parts be sent to them."

 

[stoned34FR]

The first RAM sticks are most likely Samsung and not SK Hynix.
The second RAM sticks are most likely SK Hynix.
IMO, choose the second one.

how do you know they are samsung or SK Hynix?

yes I intend to update the bios motherboard before even putting the processor
And i haven't bought anything yet I'm still stuck on the choice of ram


I saw tests that the x3ds are special compared to other non-x3d 7000s and were more sensitive to latency than speed so I'm still confused :s

 

[CeltPC]

how do you know they are samsung or SK Hynix?

yes I intend to update the bios motherboard before even putting the processor
And i haven't bought anything yet I'm still stuck on the choice of ram


I saw tests that the x3ds are special compared to other non-x3d 7000s and were more sensitive to latency than speed so I'm still confused :s

On the Tom'sHardware review of this Ram, they stated "Like its competition, G.Skill uses SK hynix M-die ICS for the memory kit, so there is some tweaking headroom left in memory modules."

https://www.tomshardware.com/review...0-c30-review-perfect-together-with-ryzen-7000

It should be noted that this was written back in February, and I have seen since then that SK-Hynix is moving toward A-Die chips. Either is fine and should be no problem.

 

[IDProG]

how do you know they are samsung or SK Hynix?

yes I intend to update the bios motherboard before even putting the processor
And i haven't bought anything yet I'm still stuck on the choice of ram


I saw tests that the x3ds are special compared to other non-x3d 7000s and were more sensitive to latency than speed so I'm still confused :s

If a RAM stick has 6400MHz or above as an XMP/EXPO setting, it is a guaranteed SK Hynix.

If a RAM stick has 5200MHz or lower as an XMP/EXPO setting, it is a guaranteed Micron.

Other than that, there is no guarantee. You have to look at the timings of the individual stick.

 

[stoned34FR]

If a RAM stick has 6400MHz or above as an XMP/EXPO setting, it is a guaranteed SK Hynix.

If a RAM stick has 5200MHz or lower as an XMP/EXPO setting, it is a guaranteed Micron.

Other than that, there is no guarantee. You have to look at the timings of the individual stick.

so these 2 kits can be SK Hynix or samsung since they are between 5200mhz and 6400mhz is that right?

cl28:F5-5600J2834F16 GX 2-TZ5N​

CL30: F5-6000J3038F16GX2-TZ5N​

it's a bit the lottery,lol

 

[IDProG]

so these 2 kits can be SK Hynix or samsung since they are between 5200mhz and 6400mhz is that right?

cl28:F5-5600J2834F16 GX 2-TZ5N​

CL30: F5-6000J3038F16GX2-TZ5N​

it's a bit the lottery,lol

No, that's not what I mean. Each product ID DEFINITELY has one type of DIMM producer (Micron, Samsung, SK Hynix). So, if a Product ID is found to be produced by Samsung, then all RAM sticks with the exact same Product ID are produced by Samsung.

What I mean is that you cannot determine the producer of a RAM stick of speeds 5600MHz - 6200MHz just by its speed, because both Samsung and SK Hynix DIMMs can reach 5600MHz - 6200MHz.

 

[stoned34FR]

No, that's not what I mean. Each product ID DEFINITELY has one type of DIMM producer (Micron, Samsung, SK Hynix). So, if a Product ID is found to be produced by Samsung, then all RAM sticks with the exact same Product ID are produced by Samsung.

looking at the amazon comments I saw several comments which confirmed that it was indeed SK Hynix M-die for the 2 kits.


and as you can see in this test at 5:30 latency seems to matter more than frequency especially on x3d
the ddr5 5200 cl40 is not so far away as the cl30-6000mhz. even with expo mode activated
and at 6:40 the conclusion

It's annoying that there is simply no test to compare the 2 kits cl28-5600 vs cl30-6000 on the 7800x3d

 

[DocHoliday586]

Just regarding the two ram configs you provided: (CL28 5600 vs. CL30 6000)
If you dont include subtimings.. and are just using these two values. Absolute latency of these two ram configs are equal. Both achive the same cycle timing of 10ns.
CL28 5600 = 10ns
CL30 6000 = 10ns

(CAS 28 × 2000 is 56000)
(56000 ÷ 5600mhz) = 10

(CAS 30 x 2000 is 60000)
(60000 ÷ 6000mhz) = 10

Considering this.. if you go with 6000 and you manage to finesse that CAS down to 28. You'll get a faster absolute latency of 9.3 resulting in quicker cycles.

(CAS 28 x 2000 is 56000)
(56000 ÷ 6000mhz) = 9.3

But.
That is just the tip of the icebergberg...
Below that iceberg are subtimings and voltages you'll need to finesse if you go any further.

L=(T/F)*2000
L=latency,in ns
T=CL orRCD timing,in ticks
F=frequency, in MT/s

L=(T/F)*2000)*V1)/V2
V1 = XMP voltage
V2= planed voltage

(CL or RCD)
T=L*F/2000

RFC calculations:
L=T*2000/F
L=latency, in ns
T=tRFC, in ticks
F =frequency, in MT/s