https://videocardz.com/newz/asus-confirms-radeon-rx-7900-xtx-xt-tuf-gaming-clock-speeds
 
As reported last month, ASUS was the first company to unveil its custom Radeon RX 7900 GPUs. These TUF Gaming cards are based on 7900 XTX and RX 7900 XT SKUs with a custom 3.6-slot thick triple-fan design also equipped with three 8-pin power connectors. ASUS has now confirmed the clock speeds that will be applied to each of the four models that were announced. ASUS official specs list the so-called ‘default’ mode and ‘OC’ mode. The latter is the highest official spec that can be applied through ASUS software called GPU Tweak. For this reason, it should not be considered an ‘out of the box’ spec, but rather the highest validated clock speed that is officially supported and will not affect the warranty. As a reminder, Radeon RX 7900 XTX default game clock is 2300 MHz and boost clock goes up to 2500 MHz. For Radeon RX 7900 XT GPU this is 2000 MHz and 2400 MHz respectively.
 
ASUS TUF Gaming Radeon RX 7900 XTX OC Edition

• OC mode:
  • up to 2615 MHz (Boost Clock) +4.6%
  • up to 2455 MHz (Game Clock) +6.7%
• Default mode:
  • up to 2565 MHz (Boost Clock) +2.6%
  • up to 2395 MHz (Game Clock) +4.1%

ASUS TUF Gaming Radeon RX 7900 XT OC Edition 

• OC mode:
  • up to 2535 MHz (Boost Clock) +5.6%
  • up to 2175 MHz (Game Clock) +8.7%
• Default mode:
  • up to 2500 MHz (Boost Clock) +4.1%
  • up to 2130 MHz (Game Clock) +6.5%

The OC Edition of the Radeon RX 7900 XTX TUF Gaming GPU has a default clock at 2565 MHz, which represents 2.6% (boost) factory overclocking. However, in OC mode the frequency goes 4.6% above the AMD specs. Meanwhile, the RX 7900 XT TUF OC model has slightly higher overclock. By default, is ships with 2500 MHz clock, so 4.1% higher above the specs, while the OC mode applies 5.6% overclock through the software. Game clocks are even higher, but with proper cooling one is more likely to see the GPU reaching boost clock rather than game clock. Overall, these performance upgrades are similar to Radeon RX 6900 XT TUF OC Gaming GPUs, but it is worth noting that ASUS did have a higher tier TUF TOP Edition with even higher overclock.
 
The December launch is coming very soon. Looking forward to 3rd party hardware reviews.