Inno3D RTX 4090 X3 OC Review

1. Introduction2. Meet the Inno3D RTX 4090 X3 OC3. Testing Methodology4. 3DMark Time Spy Extreme5. Game Benchmarks6. Clock Speed7. GPU Temperatures8. Memory Temperatures9. Acoustics10. Noise-Normalised Temperatures11. Power Draw12. Overclocking13. Closing Thoughts14. View All Pages

I mentioned earlier in the review that it was interesting to see Inno3D include a 3x 8-pin power adapter, instead of the 4x 8-pin adapter that comes with the RTX 4090 Founders Edition. It turns out, a 4x 8-pin adapter would simply be unnecessary for the X3 OC as its power limit is locked at 450W and cannot be raised, even when using a 4x 8-pin power adapter – yes, I tried!

This has implications for overclocking, as without being able to increase the power limit, the card simply won't be able to push the clock speed as high.

We certainly found that was the case in our testing. I was able to add 195MHz to the GPU core, when I was able to add 260MHz to the Founders Edition.

The GDDR6X memory overclocked very well, however, hitting 24.2Gbps.

This overclock resulted in the X3 OC operating at 2896MHz on average. The RTX 4090 Founders could push that bit faster, however, hitting 2971MHz.

As a result, the X3 OC couldn't match the performance of the Founders Edition when overclocked. It saw gains of between 5-6% across our testing, which isn't a huge step forward – but considering the locked power limit, it's certainly better than nothing.

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