NVIDIA GeForce RTX 4070 SUPER vs AMD Radeon RX 7800 XT
Transient-aware PSU requirements, ATX compliance, cable safety audit, and power efficiency comparison.
| Specification | NVIDIA GeForce RTX 4070 SUPER | AMD Radeon RX 7800 XT |
|---|---|---|
| Performance Tier | High-End | High-End |
| Total Board Power (TBP) | 220W | 263W |
| Transient Peak (modeled) | 341W | 411W |
| Minimum Recommended PSU | 500W | 600W |
| PCIe Connector Required | 12v-2x6 | 8pin-x2 |
| Number of Connectors | 1 | 2 |
| ATX 3.1 Required | ✓ Yes | ✗ No |
| Daisy-Chain Safe | ✗ No | ✗ No |
| MSRP | $599 | $449 |
| Generation | Ada Lovelace | RDNA 3 |
PSU Requirement Breakdown
NVIDIA GeForce RTX 4070 SUPER
⚠ NVIDIA GeForce RTX 4070 SUPER 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 7800 XT
⚠ AMD Radeon RX 7800 XT requires 2 separate 8-pin PCIe power cables. DO NOT daisy-chain — each cable must run directly from the PSU to the GPU.
Power Efficiency Verdict
NVIDIA GeForce RTX 4070 SUPER requires less PSU headroom per dollar spent. It needs 500W recommended at $599, versus 600W at $449 for the AMD Radeon RX 7800 XT.
Note: NVIDIA GeForce RTX 4070 SUPER 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 SUPER?
NVIDIA GeForce RTX 4070 SUPER has a 220W 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 7800 XT?
AMD Radeon RX 7800 XT has a 263W TBP and transient peak up to 411W. We recommend a minimum 600W ATX 3.1 PSU for stable operation.
Does NVIDIA GeForce RTX 4070 SUPER or AMD Radeon RX 7800 XT need ATX 3.1?
NVIDIA GeForce RTX 4070 SUPER requires an ATX 3.1 PSU with a native 12V-2x6 connector. Do not use adapter cables. AMD Radeon RX 7800 XT uses 8pin-x2 and does not require ATX 3.1.