Hardware Specifications
| Parameter | Specification |
|---|---|
| GPU Architecture | NVIDIA Pascal GP104-400-A1 — 16nm FinFET |
| PCI Device ID | 0x1B80 (GP104-400-A1) |
| SubVendor ID | 0x3842 (EVGA) / SubSystem 0x6286 (FTW) |
| CUDA Cores | 2560 |
| Base Clock | 1607 MHz (FTW: 1721 MHz factory OC) |
| Boost Clock | 1733 MHz (FTW: 1860 MHz factory OC) |
| Memory | 8 GB GDDR5X — Micron memory |
| Memory Clock | 1251 MHz (10 Gbps effective) |
| Memory Bus | 256-bit |
| Memory Bandwidth | 320 GB/s |
| TDP (stock BIOS) | 180W (FTW: 200W) |
| Power Connectors | 8+8 pin |
| Dual BIOS | Yes (software + select hardware revisions) |
| Flash Tool | nvflash 5.770+ |
| BIOS Editor | NiBiTor 6.x (Pascal P-state support) |
GDDR5X: Different from GDDR5
The GTX 1080's GDDR5X memory (Micron MT61K256M32JE-14) operates at a higher data rate than standard GDDR5 by multiplying the internal prefetch from 8n to 16n. This doubles the effective bandwidth at the same clock frequency but at the cost of higher memory controller complexity. NiBiTor does not expose GDDR5X timing strap modification in the way Polaris BIOS Editor handles GDDR5 — GDDR5X timing is substantially more complex and tightly bound to silicon validation.
Power table modification via NiBiTor's PowerPolicy tab is the primary BIOS-level modification for GTX 1080 cards. The FTW's factory 200W TDP can be pushed to 220W in NiBiTor, with the dual 8-pin delivery providing headroom. Sustained GDDR5X operation at elevated power targets runs the memory controller harder — adequate case airflow addressing the card's rear I/O region is important for sustained compute runs.
NiBiTor Power Table Walkthrough
The GTX 1080 FTW's BIOS loads cleanly in NiBiTor 6.x. Navigate to the PowerPolicy tab to see the Power policy table with Base Power (TDP), Maximum Power, and Minimum Power entries. For the FTW variant:
- Base Power: 200W (stock BIOS) — can be raised to 220W
- Maximum Power: 240W (stock) — headroom for boost algorithm
- Boost Adjustment: The FTW ships with a higher boost offset than reference — NiBiTor shows this in the Performance tab P-state table where the max GPU clock P-state entry is set above stock GTX 1080 spec
After modifying and saving, flash with nvflash targeting the primary BIOS: nvflash --protectoff modified.rom. With dual-BIOS hardware, always maintain a known-good secondary BIOS for recovery access.
nvflash Procedure for GP104
The GP104 (GTX 1080) nvflash workflow is well-established for Pascal. Refer to the nvflash reference guide for full command details. Key notes for the FTW variant:
- nvflash 5.770 or later is required for full GP104 device recognition
- Use
nvflash --listto confirm device enumeration before backup - The FTW's factory OC BIOS has protection bits set —
--protectoffis required - Backup the factory BIOS with
nvflash --save factory-backup.rombefore any modification