The original post: /r/overclocking by /u/Smooth_Cranberry460 on 2024-12-20 00:57:28.
Disclaimer:
I am not experienced at overclocking. I started learning about 4 weeks ago. I am not trying to flex numbers or prove anything. This post is simply a breadcrumb trail I am leaving to help others who may wish to try something similar.
Hardware:
CPU: Ryzen 9 7950X3D
RAM: Corsair Dominator Titanium: 32GBx4 CL30 6000Mhz 1.4V DDR5
Set 1- SKU - CMP64GX5M2B6000Z30 32GBx2
Set 2- SKU - CMP64GX5M2B6000Z30 32GBx2
Motherboard: MSI PRO X870-P WIFI
BIOS Version: 7E47v1A25 (Yes I know a new one just came out)
GPU: ASUS TUF RX 7900 XTX 24GB OC
AIO: Corsair H170i 420mm
Thermal Compound: Artic MX-6
PSU: Corsair HX1500i
SSD 1: Crucial 705 2TB With Heatsink
SSD 2: Predator GM7000 4TB Aftermarket Heatsink
Case Corsair 7000D
7 Corsair 140mm Elite Fans.
Timings:
Latency Results With Above Timings:
Stability Test 1: Cyberpunk 2077 Settings Auto Optimized by AMD Adrenalin
^Temperatures provided, 1 hour run. No crashes, game files validated afterwords. No file failures
Stability Test 2: Stalker 2: Shadow of Chernobyl
Temperatures provided
Stability Test 3: Escape From Tarkov, Map: Streets of Tarkov
Settings in Full:
Main Timing Configuration:
tCL = 30T
tRCD = 36T
tRP = 36T
tRAS = 35T
tRC = 84T
tWR = 54T
tRFC1 = 520T
tRFC2 = 405T
tRFCSB = 320T
tREFI = 65535
Sub Timing Configuration:
tRTP = 16T
tRRDL = 14T
tRRDS = 6T
tFAW = 24T
tWTRL = 20T
tWTRS = 7T
Turn Around Timing Configuration:
tRDRDSCL = 7T
tRDRDSC = 1T
tRDRDSD = 9T
tRDRDDD = 11T
tWRWRSCL = 8T
tWRWRSC = 1T
tWRWRSD = 9T
tWRWRDD = 11T
tWRRD = 6T
tRDWR = 16T
Other Settings
Power Down Enabled
Gear Down Mode Auto
Processor CS Drive Impedance auto
Processor CK Drive Impedance auto
Processor CA Drive Impedance 30 Ohms
Processor DQ Drive Impedance 40 Ohms
Processor ODT Drive Impedance 48 Ohms
DRAM DQ Drive Impedance 34 Ohms
DRAM ODT Impedance RTT_NOM_WR = RZQ/4 (60)
DRAM ODT Impedance RTT_NOM_RD = RZQ/4 (60)
DRAM ODT Impedance RTT_WR = RZQ/2 (120)
DRAM ODT Impedance RTT_PARK = RZQ/5 (48)
DRAM ODT Impedance DQS_RTT_PARK = RZQ/5 (48)
DRAM Voltage = 1.4V
Dram Speed Set = 6000MT/s
Memory Contex Restore Disabled
PBO Enabled
High Efficiency Mode Enabled
X3D Mode Enabled
UCLK DVI MODE: UCLK = MEMCLK
FCLK = 2000 MHz
Booze: Everclear 151 Proof (you can mix it with orange juice (electric screwdriver) for the first 2 shots then go straight to the bottle after it kicks in. This is what will help you through the process)
Thoughts:
Its a long story how I ended up here. I’m going to save that for the comment section. All of the settings above are useless for my build except for the drive impedances. That is what made this thing boot past 4600MHz. Booting at 128GB was as simple as slapping the sticks in and letting the system train the ram. Defaulted to 3600MHz and with a slight voltage increase I could get it to 4600MHz but without the drive impedance values NOTHING else works. You must have those. I got the idea from another website (overclock.net), on there was a post from a guy in Tiwan who was pushing 60ns latency on a 7900X (i think that was his CPU) with 128GB of ram. The drive impedance values were the key for him as well. His values were slightly lower for the processor DQ, ODT, and DRAM DQ drive values. I raise mine up a bit because more impedance means less current, less heat, less likely to damage something. I don’t know what the engineers rated this system for concerning those drive impedances so if I can get away with higher values and run stable, I shall do it.
Concerning Stability:
“Ermmm, excuse me. You didn’t stress test this in y-cruncher or memtest5? Wow, kinda cringe bro” To these comments, I am a gamer and nothing more. If it can play my silly games, then it is stable enough for me. Period.
Concerning PBO:
I have a very small understanding on what PBO is exactly or how to use it aside from just turning it on. If anyone here has in-depth knowledge on how to use PBO to SAFELY get some extra performance, I’d love to hear it! Shoot a comment below.
Concerning the results:
Temps look okay, I guess? It idles at 46C-44C and 70C sustained while gaming. Max temp is 89C for this CPU so I think that is close to ideal. Share your thoughts. My read values in my Aida64 screenshot are odd. The guy in Tiwan was pushing 80,000 MB/s on his read. I glanced somewhere that this read value on my end is possibly due to the nature of my CPU. If anyone has some in depth knowledge on the X3D’s read values leave a comment.