Crosshair VII Hero Essential Info Thread

[gupsterg]

This post by The Stilt is useful to see what the SMU (FIT) determines as safe voltage for a Zen2 CPU under high loads.

Thanks to the features recently added in HWInfo, it is rather easy to verify what kind of voltages are safe to your CPU specimen. As said before, each and every CPU is different in terms of silicon characteristics, even if they are the same SKU with consecutive serial numbers.

First, set PPT / TDC and EDC to sufficiently high values, which are unreachable in practice. Then, make sure that the CPU is running bone stock (outside the altered PBO limits). Practically meaning that there are no fixed frequencies, voltages, voltage offsets or load-line adjustments used.

Open HWInfo, go to the "Central Processor(s)" and make sure that "CPU PBO Scalar (Reliability Reduction)" reads 1.00x. Then run the worst-case multithreaded workload of your choice (the worst-case workload of your use). While the workload is running, check HWInfo sensors for the "CPU Core Voltage (SVI2 TFN)". That value is the practical one, which the silicon fitness monitoring has allowed and is safe, without loosing any reliability. You can double check that this value wasn't affected by any of the other limits (thermal, power, current): change PBO Scalar to 2x value and repeat the test. If the observed voltage has increased from doing that, then the figure is accurate for the workload you used.

Exactly my thoughts - thanks for the extra data!

I have found while comparing my performance with others that I often beat those with 1900 FCLK anyway, indicating that some are pushing further than is beneficial..... Though of course we all want 1900 FCLK

NP .

It could well be some are pushing too hard, but dunno. I can see some swings in say CB20, for example first run of the day when system is coolest I could see ~7450 points for multi and other times later I could see ~7200. In points it may seem a large swing, in % it's more akin to run to run variance.

Any how I think Zen2 has been a real nice experience to use, looking forward to Zen3 .

I have the Crosshair Vii X-470 w/ Ryzen 7, Radeon 7. Used mostly for gaming, I was curious about the overclock presets in the bios. Most of you all are well beyond using such basic stuff, but for a newbie are they a safe way to start overclocking my system?

Dunno never used them TBH.