Legit Reviews posted a review on the ECS GeForce 8800 GT 256MB Video Card
A quote from the article:
>> ECS GeForce 8800 GT 256MB Video Card Review - N8800GT-256MX
The GeForce 8800 GT 256MB card has been around since November 2007 and now, six months later some very interesting versions of this card are appearing on the market. The ECS N8800GT-256MX is one of these cards! It appears that ECS has placed 512MB of GDDR3 memory on the N8800GT-256MX, but only enabled 256MB of the graphics memory through the BIOS. Once a quick BIOS flash is performed on the card it turned into a GeForce 8800 GT 512MB graphics card for the price of a 256MB card!
>> ECS GeForce 8800 GT 256MB Video Card Review - N8800GT-256MX