Samsung rolls out GDDR4 memory
GDDR4 memory is rolling off Samsung's production lines, and the company
its first volume shipments
of the new memory type, The Register
reports. Samsung's GDDR4 is clocked at a whopping "effective" speed of
2.4 GHz, yielding a total 9.6 GB/s of bandwidth per memory chip. In
contrast, GDDR3 memory found in NVIDIA and ATI's top-of-the-line
graphics cards runs between 1.55 GHz and 1.7 GHz and offers less than 7 GB/s of bandwidth per chip.
Assuming a 256-bit memory bus, Samsung's new GDDR4 could
provide a maximum of 76.8 GB/s of memory bandwidth for a single
card—considerably more than the 49.6-54.4 GB/s available to today's
According to some reports, ATI plans to
use GDDR4 memory in a shipping graphics card as early as this fall. An
R580+ graphics chip will reportedly show up in a GDDR4-powered successor
to the Radeon X1900 XTX, which The Inquirer claims will be
dubbed Radeon X1950 XTX.