Tweaking AMD 7950x & 192GB DDR5 for Maximum Performance! (Patreon)

Hi guys,

I just upgraded old setup, and it’s been a game changer for the project. Here’s the new gear:

AMD 7950x, 16 cores

192 GB RAM running at 5200MHz

X670E Taichi Carrara, which allows for dual GPUs.

First impression? The AMD 7950x is a beast. Can you imagine compiling Unreal Engine 5 in just 30 minutes? For comparison, my old 6-core i7-3970X took about 4 hours for the same task—no joke.

That said, the 192 GB RAM was a bit tricky. Officially, the 7950x supports 4x2R sticks only at DDR5-3600, but the memory we got runs at 5200MHz. After some trial and error, I managed to tweak the BIOS settings and get it running stable at 5200MHz. I ran a full TestMem5 check, which took 4 hours and came back with no errors. I’ll continue testing to be sure everything’s rock solid, but so far, it’s looking good!

In case anyone’s in a similar situation and wants to try these tweaks, here are the DDR5 BIOS settings that worked for me:

DRAM Frequency: [Auto]->[DDR5-5200]

CAS# Latency (tCL): [Auto]->[38]

RAS# to CAS# Delay to Read (tRCDRD): [Auto]->[38]

Row Precharge Time (tRP): [Auto]->[38]

RAS# Active Time (tRAS): [Auto]->[84]

RAS# Cycle Time (tRC): [Auto]->[122]

Write Recovery Time (tWR): [Auto]->[84]

Refresh Cycle Time (tRFC1): [Auto]->[1068]

Refresh Cycle Time (tRFC2): [Auto]->[573]

Refresh Cycle Time (tRFCSb): [Auto]->[495]

TwrwrSd: [Auto]->[12]

TwrwrdDd: [Auto]->[12]

Processor CA drive strengths: [Auto]->[30.0 Ohm]

Processor DQ drive strengths: [Auto]->[34.3 ohm]

Processor ODT impedance: [Auto]->[48 ohm]

Dram DQ drive strengths: [Auto]->[34 ohm]

Dram ODT impedance RTT_NOM_WR: [Auto]->[RZQ/4 (60)]

Dram ODT impedance RTT_NOM_RD: [Auto]->[RZQ/4 (60)]

Dram ODT impedance RTT_PARK: [Auto]->[RZQ/5 (48)]

Dram ODT impedance DQS_RTT_PARK: [Auto]->[RZQ/5 (48)]

SOC/Uncore OC Voltage (VDD_SOC): [Auto]->[1.200]

VDD Misc Voltage: [Auto]->[1.100]

VDDIO Voltage (VDDIO_MEM_S3): [1.100]->[1.350]

DRAM VDD Voltage: [1.100]->[1.350]

DRAM VDDQ Voltage: [1.100]->[1.350]

Infinity Fabric Frequency: [Auto]->[2000 MHz]

Hope this helps anyone looking to push their hardware to the next level!

Cheers!