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novas memorias samsung GDDR4 a 4Ghz
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Samsung Touts 4GHz Memory for Graphics Cards
Getting more speed is always nice - and Samsung is about to break the speed barrier yet again, pushing GDDR4 chips to 4GHz and beyond. At the International Solid-State Circuits Conference (ISSCC), Samsung presented its new GDDR4 memory chips that operate at about 40% higher speed than GDDR4 was initially estimated to, but use more power.
4GHz GDDR4 memory chips are only "available" in 512Mb capacities and were manufactured using 80nm process technology.
They were designed for a power supply voltage of 1.4V – 2.1V, reports PC Watch web-site.
The data rate of 4Gb/s (4 gigabit per second, or 4GHz) was achieved with devices operating at 2.0V, which is higher than Samsung’s current-generation GDDR4 chips that can function at up to 1.9V officially.
GDDR4 memory at 4.0GHz delivers bandwidth of 16GB/s and if such chips were used in today’s graphics cards that have 256-bit memory bus, this would result in peak data bandwidth of 128GB/s, two times more than the ATI Radeon X1950 XTX (the only graphics card on the market that uses GDDR4) can offer.
For tomorrow’s graphics boards that will have 512-bit memory access Samsung’s new chips would give peak memory bandwidth of 256GB/s, which is nearly three times more than 86.4GB/s that the currently highest-performance graphics card – NVIDIA GeForce 8800 GTX – has.
Are we beginning to enter the era when GPU memory will be clocked many times higher than our CPUs?
Source: X-bit Labs and PC Watch
sera que foi tambem um dos motivos do atraso da R600?
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