The higher the number at the end, the faster the memory. So GDDR5 is the fastest of those three (and it's usually a multiplier - so GDDR5 is 5x data rate whereas DDR3 is only 3x). The G is supposed to signify designed for GPUs, but often just is added for graphics cards with no real change in design.
External risk to world-wide environment; outside the influence of a single country's government.
Glossary > Forex > marginal risk. marginal risk. The Exposure assumed by the issuer of a currency or a commodity forward or futures contract of the purchaser of the contract going into default. The issuer must take action and liquidate the contract before having to pay for any adverse movements in the currency or commodity. Browse by Subjects.