NVIDIA GeForce RTX 4070 vs AMD Radeon RX 7700 XT
Transient-aware PSU requirements, ATX compliance, cable safety audit, and power efficiency comparison.
| Specification | NVIDIA GeForce RTX 4070 | AMD Radeon RX 7700 XT |
|---|---|---|
| Performance Tier | High-End | Mid-Range |
| Total Board Power (TBP) | 200W | 245W |
| Transient Peak (modeled) | 341W | 371W |
| Minimum Recommended PSU | 500W | 550W |
| PCIe Connector Required | 12v-2x6 | 8pin-x2 |
| Number of Connectors | 1 | 2 |
| ATX 3.1 Required | ✓ Yes | ✗ No |
| Daisy-Chain Safe | ✗ No | ✓ Yes |
| MSRP | $499 | $369 |
| Generation | Ada Lovelace | RDNA 3 |
PSU Requirement Breakdown
NVIDIA GeForce RTX 4070
⚠ NVIDIA GeForce RTX 4070 requires an ATX 3.1 PSU with a native 12V-2x6 cable. DO NOT use adapter cables from older 8-pin connectors. If your PSU lacks a native 12V-2x6 port, you must upgrade your PSU.
AMD Radeon RX 7700 XT
Power Efficiency Verdict
NVIDIA GeForce RTX 4070 requires less PSU headroom per dollar spent. It needs 500W recommended at $499, versus 550W at $369 for the AMD Radeon RX 7700 XT.
Note: NVIDIA GeForce RTX 4070 requires an ATX 3.1 PSU with a native 12V-2x6 cable — factor in a possible PSU upgrade cost if you currently own an ATX 2.x unit.
Frequently Asked Questions
Which PSU do I need for NVIDIA GeForce RTX 4070?
NVIDIA GeForce RTX 4070 has a 200W TBP but can spike to 341W during transient loads. We recommend a minimum 500W ATX 3.1 PSU with a native 12V-2x6 connector for safe operation with headroom.
Which PSU do I need for AMD Radeon RX 7700 XT?
AMD Radeon RX 7700 XT has a 245W TBP and transient peak up to 371W. We recommend a minimum 550W ATX 3.1 PSU for stable operation.
Does NVIDIA GeForce RTX 4070 or AMD Radeon RX 7700 XT need ATX 3.1?
NVIDIA GeForce RTX 4070 requires an ATX 3.1 PSU with a native 12V-2x6 connector. Do not use adapter cables. AMD Radeon RX 7700 XT uses 8pin-x2 and does not require ATX 3.1.