Ask the HIS manufacturer. There is nothing wrong with it, XFX helps their customers with graphic card BIOS problems.
Can look at the thread here:http://www.overclock.net/t/906385/6950-bios-flash-void-xfx-warranty
Also here is the Warranty information:
"What is covered by the Warranty?
The product warranties that maintain and repair faulty HIS graphic cards within its warranty period.
What is NOT covered by the Warranty?
This Limited Warranty will not apply if a claim is made arising from any unacceptable use or care of the Product, including (without limitation) physically damaged, graphics card is burnt out, misuse, abuse, negligence, acts of God, unauthorized modification or repair, unauthorized commercial use and any operation of the Product outside HIS recommended parameters. This Limited Warranty is also invalid if any serial number or date stamp on the Product has been altered, obliterated or removed. Cosmetic damage and normal wear and tear are not covered.
This Limited Warranty is only valid in the country where originally purchased. If products were shipped internationally by an authorized reseller, country of original purchase is the shipping point of the reseller. This Limited Warranty applies only to the original purchaser and is non-transferable.
HIS is not responsible for any loss, damage or shipping charges incurred to our RMA Center. Additionally, HIS reserves the right to inspect and verify the defects of the product(s) that are returned. Replacement or refund of purchased product is not included in the warranty."
Warranty Service: http://www.hisdigital.com/us/support-71.shtml
The one to note is unauthorized modification. But it's always better to ask HIS.