Sapphire Radeon RX 7900 GRE Pure Review 3

Sapphire Radeon RX 7900 GRE Pure Review

Value & Conclusion »

Overclocking

GPU-Z Screenshot for Overclocked Graphics Card

(the correct ROP count is 160, this is a bug in GPU-Z that will be fixed in next release)

Overclocking the Radeon RX 7900 GRE is very similar to the other RX 7900 Series cards.
  • To start, you have to raise the power limit to maximum, the slider ends at +15%
  • Next, max out the memory clock slider, it's rather short, topping out at 2316 MHz, definitely not high enough to use the full potential of the memory chips.
  • Now, also increase "Max Frequency" to maximum, which is at 2803 MHz, not much higher than the default of 2530 MHz, another artificial limitation
  • At this point run a first stability test and record performance.
  • Now gradually lower the maximum voltage (default is 1.05 V), until your card becomes unstable, which happened for me at 0.89 V 1.02 V, depending on the card.
  • Increasing the Min Frequency slider made no significant difference in performance. This might increase power consumption though for very little actual FPS improvement.
Maximum Overclock Comparison
Avg. GPU ClockMax. Memory ClockPerformanceMax Power Limit
ASRock RX 7900 GRE Steel Legend2802 MHz2316 MHz72.9 FPS300 W / 345 W / +15%
Sapphire RX 7900 GRE Nitro+2748 MHz2316 MHz74.8 FPS305 W / 351 W / +15%
Sapphire RX 7900 GRE Pulse2718 MHz2316 MHz74.7 FPS270 W / 311 W / +15%
Sapphire RX 7900 GRE Pure2734 MHz2316 MHz75.1 FPS275 W / 320 W / +15%
Testing notes & interpretation
  • Unless specifically noted in the text above, overclocking results listed in this section are achieved with the default settings for fan, power, voltage, etc. We choose this approach as it is the most realistic scenario for most users, while still maximizing the potential performance of the card.
  • Each GPU, including each GPU of the same make and model, will overclock slightly differently based on random production variances.
  • The data in this table shows comparable overclocks using identical conditions from previous TechPowerUp reviews.
  • The Average GPU clock frequency reported in the table is an actual measurement of the clock speeds during 3DMark Time Spy Extreme GT1. Making a "maximum overclock" comparison just based on the "rated" clocks in GPU-Z will be inaccurate—actual frequencies is what matters.

Overclocked Performance

Using these clock frequencies, we ran a quick test of 3DMark Time Spy GT1 to evaluate the gains from overclocking.

Overclocked Performance Unigine Heaven
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Dec 25th, 2024 14:36 EST change timezone

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