DDR5 blows

A

ashmelev75

[H]ard|Gawd
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Nov 29, 2007
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Had 32GB G.Skill DDR5-6000 CL30 kit for about a year in my 7600x, been playing with AI stuff, realized I could use more memory. Got 64GB G.Skill kit, same DDR5-6000 CL30 (lil worse other timings, but could not get it to run at EXPO-6000 speed. Tried this and that, single stick runs fine at 6000, both fail memory training.
After 2 hours of "training" and 6 hours of total time wasted I've just returned the new kit. Very sad day.
 
In short 6000MTS is overclocking on Ryzen 7000 and a crapshoot on anything over 2x32GB sticks.

Ryzen 7000 officially lists DDR5 support as:
Max Memory Speed
2x1R
DDR5-5200

Of course 6000 is the advertised 'sweet spot' but its still considered overclocking. The best results are seen on two sticks of memory. Most 64GB kits are 2x2R of 32GB modules which is basically trying to run 4 sticks of 16GB at 6000 and the IMC does not like it. You would probably have to live with setting XMP and or tweaking things as well as manually going for 5600 or 5200 on a 64GB kit.

I have read that the 48GB kits can be found in 2x1R modules (Teamgroup has a 7200 48GB kit is like 2x1R most likely) and they 'may' get you to 6000 or 6200 CL30ish on AM5.

But to your point yes it can be frustrating. DDR4 systems boot way faster and are pretty easy by comparison.

What kit have you decided to try next?
 
Two of these gave me 64GB@6000MHz (2 slots)

product: F5-6000J3040G32G
vendor: G Skill Intl
physical id: 3
serial: 00000000
slot: DIMM 1
size: 32GiB
width: 64 bits
clock: 505MHz (2.0ns)
 
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With the 64GB called a kit and the: single stick runs fine at 6000, both fail memory training.

Sound like a 2x32GB kit, if we are to be fair with DDR5 something like that was not uncommon with DDR-4, I ran my 3200 kit at 3000 on a 2600x
 
ashmelev75 said:
Had 32GB G.Skill DDR5-6000 CL30 kit for about a year in my 7600x, been playing with AI stuff, realized I could use more memory. Got 64GB G.Skill kit, same DDR5-6000 CL30 (lil worse other timings, but could not get it to run at EXPO-6000 speed. Tried this and that, single stick runs fine at 6000, both fail memory training.
After 2 hours of "training" and 6 hours of total time wasted I've just returned the new kit. Very sad day.
Click to expand...
The lesson here is research prior to buying. The forum is at your disposal 24/7.

If you had posted here prior to returning the 2x32gb kit you would have been able to at least gotten those running stable with help.

Occupying all four dimms (assuming that's what you meant when you said "kit") with a 2x16gb kit along with a 2x32gb kit...well, you found out how that generally goes with AM4. Should've kept the 2x32s and sold the 2x16s.
 
LukeTbk said:
With the 64GB called a kit and the: single stick runs fine at 6000, both fail memory training.

Sound like a 2x32GB kit, if we are to be fair with DDR5 something like that was not uncommon with DDR-4, I ran my 3200 kit at 3000 on a 2600x
Click to expand...
Sounds like and it is are different things. While I agree, it was worth asking for clarity.

Ddr4 did alright with 4 sticks most of the time if Intel and less so with AMD. Ddr5 at least from what I’ve experienced doesn’t like higher clocked ram in 4 sticks or tight timings.
 
You replaced the existing kit for 2 DIMMs? Or you added it giving you 4 DIMMs total?

What vSOC voltages did you try? vSOC voltage IMHO is one of the most important things when it comes to running RAM, and silicon lottery comes into play and some CPUs need more or less than others to stabilize things. FWIW I'm running 2 x 32GB DDR5 6000 (Silicon Power SP064GXLWU60AFDG) with no issues. Pretty sure I run my vSOC lower than "Auto" values too, maybe around 1.185V or so if I can remember off the top of my head.
 
drutman said:
What I liked about the X99 platform, quad channel runs fine.
Click to expand...
Oh god, when I got my x99 setup I was shocked at how long it took to boot. "This can't be right!" Then found out I could switch off RAM training and sub 10 second boots were back baby. How anyone thinks having that switched on default is a good idea I don't know. "Oh yes we've given you Gen5 storage but please enjoy the 3+ minute boot times!"

I switch it off on all machines. Never had an issue.
 
LukeTbk said:
With the 64GB called a kit and the: single stick runs fine at 6000, both fail memory training.

Sound like a 2x32GB kit, if we are to be fair with DDR5 something like that was not uncommon with DDR-4, I ran my 3200 kit at 3000 on a 2600x
Click to expand...
I remember in the early days of DDR4, running anything over 3000 was dicey, even buy 2016 3200 was good going. Stuff takes time to mature.
 
Don't expect fast speeds with 4 sticks of ddr5 on any platform.

Hell intel only promises ddr5-4400 if the board has four slots.

CAM looks like the future.
 
Sorry all for not being 100% super clear. I simply tried to replace 2x16Gb sticks with 2x32GB sticks.

TheHig What AMD officially lists as supported is more like "any garbage stick with x configuration can will run at y speed". For now I'll live with 32GB which is fine for anything other than my whimsical project.

THUMPer I did try 2x32GB, I did not try the crazy idea of running both kits at the same time.

Mega6 F5-6000J3040G32GX2-TZ5NR is what I tried.

hititnquitit Not sure what else to research here. It was an excellent Hynix kit with EXPO profile, yeah it was not in QVL for the motherboard, but most memory modules are not anyway. And of course I only tried just the new kit. Not 4 modules at the same time.

Dopamin3 With 2x16GB kit SoC voltage was set to 1.25v, with 2x32GB kit EXPO profile set SoC to 1.3v
 
The new ryzen chips are rumored to do 8000mt, and the new Intel chips are rumored to hit 10,000mt. The older platforms are pretty much maxed out at 2 dimms 6000 for amd and 2 dimms 8000 for intel.
 
Yeah, not looking forward to replace 7600x just yet. Maybe when 9xxx X3D comes out.
 
For my new rig around Xmas I'm getiing 2x16GB lowest latency 6000 with a 870E board. Then I can see how the land lies a year later when DDR5 has it's inevitable price crash like they all do. I can see what's best to get then.
 
Try bumping it up to CL34, or set the EXPO timings and manually change the speed to 5600. 6000 CL30 with dual rank sticks can be hard on Ryzen.
 
Dreamerbydesign said:
Sounds like and it is are different things. While I agree, it was worth asking for clarity.

Ddr4 did alright with 4 sticks most of the time if Intel and less so with AMD. Ddr5 at least from what I’ve experienced doesn’t like higher clocked ram in 4 sticks or tight timings.
Click to expand...

When it was in development there were warnings from people working on developing it that they weren't shore if 2 dimms/channel would be possible at all. They made it work, but with a bigger performance hit than with prior generations. Assuming it doesn't end up impossible to maintain the needed signaling in a DIMM socket entirely forcing a CAMM like solution on the desktop my guess is DDR6 will be 1 dimm/channel only.
 
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