What 16GB modules work on (which) X470 motherboards, and at which frequencies and timings?
For example, the X470 Taichi’s QVL has F4-3200C14D-32GTZR listed at 2933 MHz. Would the F4-3200C14D-32GTZ (non-RGB version) be the same?
@wendell’s review of the Crosshair VII makes it appealing due to good linux support and PCIe X4 on both M.2 slots. https://www.youtube.com/watch?v=MD_XuHv-5Cs There was mention of the C7H automatically optimizing memory frequency/timings. It would be great to hear something specifically about 16GB modules.
D.O.C.P. Standard seems to give the same results. The D.O.C.P 1 through 5 “optimized” profiles change BCLK and I don’t know much about that so I avoided those for now.
I have an 1800X, Crosshair VI Hero and a 2x16 GB 3200 MHz @ CL14 TridentZ (non-RGB) kit from G.Skill, and it runs at its advertised speed (actually better, because it runs 1T instead of 2T) since the 3xxx UEFI without any manual tweaking. I just turn on DOCP, and set its default settings.
Yes, for a couple of hours. It went fine with prime95. I use my computer 24/7, I haven’t had any problems with the memory since I bought it. It either works fine, or won’t POST
Where you successful? I’ve been trying to get F4-3466C16D-16GTZSK 16-18-18-38, using two kits (4x8) running stable and not having the best luck. Running just 16GB (2x8) is stable.
All I did was select the XMP profile (CL16-18-18-38 1.35v) in the BIOS.
The following stability tests completed without issue:
36hrs of memtest
8hrs of stressapptest
One time I rebooted and found that the UEFI defaults had been loaded, but otherwise it has been running (mostly idle) without issue for the past few weeks.
dmidecode reports that the memory is actually running at 1.2v:
# dmidecode --type 17
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 3.0.0 present.
...
Handle 0x0017, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x000E
Error Information Handle: 0x0016
Total Width: 64 bits
Data Width: 64 bits
Size: 16384 MB
Form Factor: DIMM
Set: None
Locator: DIMM 1
Bank Locator: P0 CHANNEL A
Type: DDR4
Type Detail: Synchronous Unbuffered (Unregistered)
Speed: 3200 MHz
Manufacturer: Unknown
Serial Number: 00000000
Asset Tag: Not Specified
Part Number: F4-3200C16-16GVK
Rank: 2
Configured Clock Speed: 1600 MHz
Minimum Voltage: 1.2 V
Maximum Voltage: 1.2 V
Configured Voltage: 1.2 V
...
Handle 0x001C, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x000E
Error Information Handle: 0x001B
Total Width: 64 bits
Data Width: 64 bits
Size: 16384 MB
Form Factor: DIMM
Set: None
Locator: DIMM 1
Bank Locator: P0 CHANNEL B
Type: DDR4
Type Detail: Synchronous Unbuffered (Unregistered)
Speed: 3200 MHz
Manufacturer: Unknown
Serial Number: 00000000
Asset Tag: Not Specified
Part Number: F4-3200C16-16GVK
Rank: 2
Configured Clock Speed: 1600 MHz
Minimum Voltage: 1.2 V
Maximum Voltage: 1.2 V
Configured Voltage: 1.2 V
I can also report success with 2 x 16GB Crucial DDR4-2666 ECC DIMMs on the same platform (Ryzen 5 2600X + ASRock X470 Taichi). I just used the default CL19 JEDEC timings at 1.2V.
ECC is active and working as far as I can tell
# edac-util -vv
mc0: 0 Uncorrected Errors with no DIMM info
mc0: 0 Corrected Errors with no DIMM info
edac-util: No errors to report.
I have G-Skill Trident-Z non-RGB DDR4-3000 running at 2800 with 2 sticks and tweaked timings. It wasn’t on the compatibility list, but it was cheap ish. I used the ryzen memory timings calculator with “safe” timings for the chips in these DIMMS and it has been stable.
Standard default voltage.
Was also stable out of the box with just picking “2800” from the speed profiles in the BIOS (but not stable / wouldn’t boot properly with 2933), but timings were quite loose. I didn’t try messing with voltage at all (yet).
My “stability” is basically - machine is left on 24/7. I did have some unexplained reboots whilst leaving it crypto mining with GPU (not CPU), i think that’s more likely down to possible power limits on my PSU (HX850i with dual RX Vega 64 as well - on balanced profile)… but that’s something else i need to look into. Outside of mining i have seen zero issues.
Kit arrived. First time I hooked it up I chose Stilts fast 3200 mem timings from the BIOS (CHVII)… It booted and was able to run benches, but wasn’t stable and subsequently wouldn’t boot. (Common occurence?)
Results for the 3200 stilt timing before it became unbootable.
