Here's an early-morning IQ test for you folks. Which number fills in the gap in the following line? 5450, 5570, 5670, 5770...5850, 5870, 5970.
Pat yourself on the back if you guessed 5830, because that's the magic number for AMD and its horde of add-in board partners.
Still confused? The Radeon HD 5830 is the last in a long line of 5-series GPUs from AMD. Designed to slot into the space that exists between the £125 HD 5770 and £225 HD 5850, the new chip will, finally, complete a top-to-bottom DX11 graphics-card line-up.
Our experience has shown that it's fairly easy to conjecture as to how AMD will snip the GPU for a certain price bracket, but the HD 5830 is rather strange. Read on to find out if it's worth £190 of your hard-earned.