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AMD Ryzen 3 3100 & 3300X CPU Review (Page 8)

Shannon Robb | May 7, 2020 at 8:00 am CDT - 4 mins, 15 secs time to read this page
Rating: 95%Manufacturer: AMDModel: Ryzen 3 3300X

Clocks, Overclocking, Thermals, and Power Consumption

Here we will look at the physical and functional performance metrics for the new Ryzen 3 processors. This includes out of the box clocks, thermals, power consumption, and of course overclocking.

Out of the Box Clocks


First up is a frequency plot for the Ryzen 3 3100, which shows the frequency stumbles around 3100 - 3900 during idle with my logging running with a polling rate of 1000ms. At the 25 second mark, I fired off the Time Spy stability test in 3DMark. As you can see, the CPU hangs at 3900 solid with occasional blips on single cores to 3100 between loading parts of the benchmark.

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The 3300X has a much higher clock, and as we see here, once we start the benchmark, the CPU sits at around 4341MHz and only dips during the loading scenes.

Power Consumption

For power consumption tests, we use a wall meter to test the full system draw. The reason for this is it will represent what the entire system pulls versus our meter, which shows power draw on each PSU cable. The reason for this is that measuring the power draw from the EPS cable, for example, does not take into account VRM losses and, therefore, can show a much higher power draw for the CPU or other device due to an inefficient VRM design or loading range.

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Idle power with the full system and TITAN RTX discrete GPU in place, we see the 7700K pulling the lowest. They were followed by the 3400G and the two remaining Intel entries. The 3100 jumps to 66W, while the more powerful 3300X draws an additional two watts.

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Loading up the CPU with a full FPU load, and we see a different story take shape. Now the 3100 tops the chart pulling a paltry 126W. The 3300X is up to 147W while all the other CPUs scale up from there. A notable mention here is that the 7700K, even being an older chip, still does well, pulling only 144W.

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Testing synthetic GPU stress only is an excellent way to show the overhead the CPU adds, as the GPU does not pull more power after it reaches steady state. Here we see the 3100 hold a top-three spot while the 3300X falls to the bottom 40%. This is not horrible; its simply showing the extra wattage necessary to run the rig with a full GPU load.


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Idle temps for the two new chips are 26C for the 3100, while the 3300X comes in a single degree higher at 27C. Thermal sensors at idle are always a little funny as they were made to be accurate under high temp and load, but I have found that idle can float, so take this ranking with a grain of salt.

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Loading each CPU up with a full burn-in FPU load, and we see the gaps start to widen. We waited for each platform and cooler to reach full saturation/steady-state before making any measurements. Here we see the 3100 topped out at 53.2C while the 3300X stepped up in a significant way reaching 71.5C. This was surprising enough we remounted coolers four times, and the thermal variance between mounts was about 1C at most. The 3300X runs warm, but I guess I should not be surprised based on its boost clocks.


Overclocking Ryzen has been an exercise in futility at most junctures. Typically our analysis ends with something to the tune of just use PBO as it will do the job, and you won't lose the higher single-core boost. But we always have to try.

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First on the bench for overclocking is the 3100, and much to my surprise, we were able to get a good clock at 4.4Ghz from it. This overclock was achieved with 1.295VCore (set in UEFI), This raised our nT Cinebench R20 score to 2669, which is an increase of 315 points or 12%. The 1T score rose to 508 from 449, which is an increase of 59 points or 12% once again. This is worth mentioning, as this places the 3100 at the level of the 3300X.

Now let's see what the 3300X has left in its tank.

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Another shocker here as we were able to achieve a 100% stable 4.5Ghz with our sample. We could get 4.6GHz bench stable but not able to pass all tests, so we backed off to 4.5GHz, and it was rock stable with the same 1.295VCore. More VCore, unfortunately, did not help things and caused worse stability. Now, checking out the nT score, we see it rose from 2625 to 2752, which is an increase of 127 points or 5%. This is not that surprising as this CPU had a much higher boost clock, hence less headroom.

The 1T result jumped from 504 to 523, which is an increase of 19 points or 4%.

I can say that at least with my samples, the Ryzen 3 3100 and 3300X leave a little bit on the table for those willing to tinker with overclocking the CPU. The 3100, definitely looks to have a decent amount of headroom to play with.

Last updated: May 7, 2020 at 04:01 pm CDT

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Shannon Robb


Shannon started his PC journey around the age of six in 1989. Now till present day, he has established himself in the overclocking world, spending many years pushing the limits of hardware on LN2. Shannon has worked with design and R&D on various components, including PC systems and chassis, to optimize the layout and performance for enthusiasts.

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