Our settings resulted in some pretty incredible clock speeds reported by Ryzen Master and HWMonitor. We started out small with a -5 offset on each core, but by the time we were done, we'd landed on a -15 offset for our four fastest cores and a -5 offset on the remaining four cores.Ĭlocking in faster than 4.6 GHz in an all-core load is pretty incredible Each offset indicates a difference of around 2 mV to 3 mV, and tweaking each core to get its best performance took the better part of a day, and then a couple hours of torture testing. Once we hit their limit, we could start adjusting other cores. We already knew that Ryzen Master identified our processor's two fastest cores as Core 0 and Core 1, so they got the biggest negative offset to push for higher speeds. AMD suggested that we might have better success hitting higher clocks if we tweaked each core individually, so that's where we started. All we did was set the Max CPU Boost Clock Override to 200 MHz and set the Precision Boost Overdrive Scalar to 10X. Then it was time to dive into the Curve Optimizer menu, which has two settings: Per Core or All Cores. We allowed AMD's firmware to handle just about everything from voltage to clock speeds. Because we're overclocking our CPU, it only made sense to use the best cooler we had available: a DeepCool Castle 280EX with a pair of Noctua NF-P14s Redux fans with a maximum speed of 1,500 RPM.īefore we begin, remember that overclocking is never a guarantee, but we wanted to see how far we could push our processor. This potent system has eight Zen 3 cores with a maximum, default boost clock of 4.7 GHz.
Zen 3 stock plus#
We're testing on a Ryzen 7 5800X purchased at retail with an ASUS TUF Gaming X570 Plus Wi-Fi, 32 GB of Corsair DDR4-3600 CL16 memory, and a GeForce RTX 3070 Founder's Edition. We've already talked about PBO 2.0 and PCO when AMD made its announcement, so you may want to read up on them before proceeding. The power budget increases are applied to Ryzen 3000 CPUs on a Core Complex level, where PBO is more fine-grained than that. AMD says PBO 2.0 has several advantage over the previous version that was part of Zen 2 CPUs, including improved single-threaded performance. This goes hand-in-hand with AMD's other power optimization tool: Precision Boost Overdrive. The distinction is pretty huge, as this is sanctioned by AMD.
Zen 3 stock windows#
The difference here is that the Power Curve Optimizer comes directly from AMD and runs at the BIOS level, rather than a third-party Windows app.
You might recall a similar approach taken by ClockTuner for Ryzen by Yuri Bubliy. Negative adjustments are pretty interesting, because if the chip can handle it, the PCO can goose the chip into running faster at a given voltage and get some more performance. The new Power Curve Optimizer, or PCO, allows us to shift all the entries on that table up or down, adding voltage (and generating more heat, something we're not really interested in today) or reducing it for each multiplier step. Ryzen processors use a table with multiplier and voltage values, which are possible clock speeds that the processor will use depending on the workload, power budget, temperature, and other factors.
Zen 3 stock series#
Many motherboard makers have included the Power Curve Optimizer which AMD announced in November in the latest BIOS updates for many of their 500 and 400 series motherboards. Recently, AMD gave tweakers the gift of a remarkably simple tool to dynamically adjust the voltage and speed matrix the processor uses to adjust itself on the fly. Clicking a single button is just not as satisfying as tweaking the knobs and switches by hand though, and we can't help but think there's still more performance locked away inside the processor.
Zen 3 stock software#
The process is simple enough, too: open a software tool, click a button, reboot, and wait. If our recent Zen 3 Ryzen review is anything to go by, one-click overclocking via Ryzen Master does add a small but measurable boost to an already-potent due of Ryzen 9 CPUs.
Meanwhile, AMD's chips have all their settings unlocked, but getting the most out of them is not quite as straight forward as it used to be. The CPUs that likely have the most headroom, those a ways down the chain in Intel's lineup, for example, have locked multipliers and offer minimal tweaking options. Setting a multiplier, even if it's higher than the base clock, might actually result in lower performance than stock speeds under certain conditions.
These days with the advent of dynamic boost speeds and optimized frequency and voltage curves, processors intelligently push themselves up close to the limit straight out of the box. Overclocking a CPU used to be a pretty simple process: change a bus speed or a multiplier, set an appropriate voltage, and voila: your Celeron 300A was running at 450 MHz, or your 600 MHz Duron was knocking on the 1 GHz barrier.
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