01.What is Resizable BAR?
Traditionally, your processor (CPU) could only access small blocks (256MB) of your graphics card memory at a time. **Resizable BAR (Re-Size BAR)** breaks this limit, allowing the CPU to see and manage the entire graphics card VRAM simultaneously. In 2026, with games using 12GB or more of textures, this feature is essential to avoid stuttering and increase minimum frame rates.
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02.1. Requirements for Activation in 2026
Not every PC supports it; you need:
- GPU: NVIDIA GeForce RTX 30 Series or higher / AMD Radeon RX 6000 or higher.
- Processor: AMD Ryzen 3000 (Zen 2) or Intel 10th Generation or higher.
- BIOS: Must be in **UEFI** mode (CSM mode must be disabled).
03.2. Step-by-Step in BIOS
Motherboard Configuration:
1. Restart the PC and enter the BIOS (usually Del or F2 key).
2. Go to advanced PCI or IO settings.
3. Enable the Above 4G Decoding option.
4. Enable the Re-Size BAR Support option (may appear as Smart Access Memory on AMD boards).
5. Save and restart. Windows 11 will now have full access to the graphics card.
04.3. How to verify if it worked?
Final check in Windows:
Open the NVIDIA Control Panel, click 'System Information' in the bottom left corner. In the list of details, look for 'Resizable BAR'. If it says 'Yes', you have successfully completed the process. For AMD users, the Adrenalin software will show 'Smart Access Memory: Enabled' in the Performance tab.
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Written by a verified expert
Douglas Felipe M. Gonçalves
Expert in Windows system optimization with years of experience in hardware diagnostics, kernel tuning, and advanced technical support. Founder of Voltris and developer of the Voltris Optimizer.
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By following this guide on How to Enable Re-Size BAR to Gain FPS in PC Gaming (2026), you are equipped with the verified technical knowledge to solve this issue with confidence.
If you still have difficulties after following all steps, our expert support team is available for a personalized remote diagnosis. Every system is unique and may require a specific approach.