Ryzen 9 7900X vs Ryzen 9 7945HX

Gaming speed, cores and clocks

The Ryzen 9 7900X and the Ryzen 9 7945HX are within a few percent of each other for gaming. In a game, you will not see the difference.

The Ryzen 9 7900X has 12 cores and 24 threads, and the Ryzen 9 7945HX has 16 cores and 32 threads. The extra cores of the Ryzen 9 7945HX help with video editing, streaming while you play and heavy multitasking more than with the game itself. Boost clocks are 5.6 GHz and 5.4 GHz.

Platform, power and price

The Ryzen 9 7900X uses the AM5 socket and the Ryzen 9 7945HX uses BGA, so they need different motherboards, and often different memory. When you compare prices, count the board as well as the chip.

Rated power is 170 W for the first and 55 W for the second. That difference changes the cooler you need, and it shows up in heat and noise.

We do not have launch prices for both chips, so we cannot compare value.

Which graphics cards each one can feed, and which to buy

At 1080p the Ryzen 9 7900X can feed a card up to the GeForce RTX 4080 Super before it holds the card back by more than 10 percent. The Ryzen 9 7945HX reaches the GeForce RTX 4080 Super. Both chips are in the same range for graphics card pairing.

Choose the Ryzen 9 7900X if you want the faster gaming chip. Choose the Ryzen 9 7945HX if you would rather spend the difference on a graphics card, which does more for frame rates in most games.