CPU vs CPU
Ryzen 9 7900X vs Ryzen 9 9900X
The Ryzen 9 9900X wins outright: 7% faster in games and $6 cheaper for the whole platform (processor, board, 32GB of memory and a cooler if needed) today.
Key facts· updated
- The Ryzen 9 7900X scores 69.2 and the Ryzen 9 9900X scores 73.9 for 1080p gaming in the Tom's Hardware CPU hierarchy, Oct 2026 (RTX 5090, fastest chip = 100).
- The Ryzen 9 9900X is 7% faster in games than the Ryzen 9 7900X (Tom's Hardware CPU hierarchy, Oct 2026).
- The Ryzen 9 7900X costs $319 and the Ryzen 9 9900X costs $331 (PC Atlas price check, Nov 3, 2026; catalog estimates, not live store prices).
- With the cheapest compatible board and 32GB of memory, it's $923 for the Ryzen 9 7900X platform vs $917 for the Ryzen 9 9900X platform (PC Atlas price check, Nov 3, 2026; catalog estimates, not live store prices).
- Both use the AM5 socket. AM5: AMD has said it will support the socket through at least 2027, so a later Ryzen can drop into the same board.
| Spec | Ryzen 9 7900X | Ryzen 9 9900X |
|---|---|---|
| Gaming score (1080p) | 69.2 | 73.9 |
| Price today | $319Sample | $331Sample |
| Platform cost today | $923Sample | $917Sample |
| Cores | 12 | 12 |
| Gaming power (approx.) | ~230 W | ~162 W |
| Socket | AM5 | AM5 |
| Memory | DDR5 | DDR5 |
| Cooler in the box | No | No |
| Built-in graphics | Yes | Yes |
Gaming score: Tom's Hardware CPU hierarchy, “Gaming CPU Benchmarks Rankings 2026” (Oct 2026; 1080p, mix of High and Ultra settings, geometric mean of 17 games, relative to the Ryzen 7 9850X3D (= 100); NVIDIA GeForce RTX 5090 Founders Edition). Specs from maker pages (checked 2026-10-29). Platform cost = processor + cheapest compatible board + cheapest 32GB kit + cheapest cooler rated for the chip when none is in the box. Highlighted = better. Prices last checked ; Sample = PC Atlas catalog estimate, not a live store price.
Good to know
- Ryzen 9 7900X on the ASRock A620M-HDV/M.2+ (mATX): Board power limit (Build a PC shows the fix).
- Ryzen 9 9900X on the ASRock A620M-HDV/M.2+ (mATX): Board power limit, May need a BIOS update (Build a PC shows the fix).
Questions
Is the Ryzen 9 7900X better than the Ryzen 9 9900X for gaming?
The Ryzen 9 9900X wins outright: 7% faster in games and $6 cheaper for the whole platform (processor, board, 32GB of memory and a cooler if needed) today.
How much faster is the Ryzen 9 9900X in games?
7% in the Tom's Hardware CPU hierarchy (Oct 2026): a 1080p gaming score of 73.9 vs 69.2, tested with an RTX 5090 so the processor is the limit. At 1440p and 4K with a mid-range card the gap shrinks, often to nothing.
What does each one cost with a motherboard and memory?
Ryzen 9 7900X: about $923 with the ASRock A620M-HDV/M.2+ (mATX) and G.Skill Flare X5 32GB (2x16) DDR5-6000 CL30 plus the Thermalright Aqua Elite 360 V3 ARGB White. Ryzen 9 9900X: about $917 with the ASRock A620M-HDV/M.2+ (mATX) and G.Skill Flare X5 32GB (2x16) DDR5-6000 CL30 plus the Cooler Master Hyper 212 Black.
Can I upgrade the Ryzen 9 7900X or Ryzen 9 9900X later?
AM5: AMD has said it will support the socket through at least 2027, so a later Ryzen can drop into the same board.