Quick Answer
A B760 board gives you zero PCIe 5.0 lanes for storage and graphics in practice: B760 itself runs PCIe 4.0, and while the CPU can provide Gen 5 lanes to the primary x16 slot on some boards, B760's chipset storage is Gen 4. For real Gen 5 storage and full lane flexibility you need a Z790 or newer platform.
Understanding B760 Lane Allocation
PCIe 5.0 availability depends on both the CPU and the chipset. The Intel CPUs that fit B760 do expose PCIe 5.0 lanes, but B760 boards typically route the primary graphics slot and storage at PCIe 4.0, and the chipset's downstream M.2 slots are Gen 4. So in everyday terms, a B760 build runs your GPU and SSDs on Gen 4, which is the deliberate cost-saving of the mainstream chipset.
This is not a limitation that hurts gaming, since current GPUs barely use even Gen 4 bandwidth and game loads are similar on Gen 4 and Gen 5 drives.
Does The Missing Gen 5 Matter?
For gaming, no. A PCIe 4.0 GPU slot does not bottleneck any current card, and Gen 4 NVMe loads games as fast as Gen 5 in practice. If you specifically need Gen 5 storage for heavy file work, step up to a Z790 or current-generation board that provides a true Gen 5 M.2 slot. Otherwise B760 with Gen 4 storage is the sensible, lower-cost choice.
FAQ
Does a B760 board give PCIe 5.0 lanes?
In practice, no usable Gen 5 for storage. B760 routes graphics and SSDs at PCIe 4.0, so your GPU and drives run Gen 4. For Gen 5 storage you need a Z790 or newer board.
Will Gen 4 graphics slow down my GPU?
No. Current GPUs barely use Gen 4 bandwidth, let alone Gen 5, so a PCIe 4.0 x16 slot on B760 does not bottleneck any modern graphics card in gaming.
When should I choose Z790 over B760 for lanes?
Only if you need a true Gen 5 M.2 slot for heavy file transfers or want more lane flexibility for multiple drives and add-in cards. For gaming, B760's Gen 4 is enough.
only game, B760's Gen 4 lanes are plenty. Choose a Z790 or newer board only when you genuinely need a Gen 5 M.2 slot for large, frequent file transfers.