According to Taiwan’s “Electronic Times†report, both NVIDIA and AMD will use TSMC's 28nm process to build two next-generation GPU core Kepler and South Island, but industry sources said that most graphics card manufacturers are conservative on the new GPU Some manufacturers have indicated that they need to look at market sales to make further decisions. Although TSMC announced that the number of 28nm process flow chip samples has exceeded 40nm more than twice the same period, the yield rate is also higher. However, video card makers are still worried that TSMC will repeat its 40nm process yield tragedy, making the company's gross profit margin much lower than expected.
At present, some high-end discrete graphics cards are already in weak demand, while the low-end entry-level graphics cards have received Intel's CPU compression with AMD's integrated graphics core. The industry believes that the demand for discrete graphics cards will further weaken.
TSMC has already announced the official mass production of the 28nm process. It is expected that the next generation of NVIDIA/AMD graphics cards will be officially released in the first quarter of next year.
Control impedance PCB
Many customers asked us what information we need for impedence control PCB.Here,there are two types for PCB manufacturer,a is single impedance ,just one trace ,two holes .and b is differential impedance,it always go with 1 pair (two trace with same width and space). For single impedance,you just tell us the trace width one which layer and what value you require .For differential impedance,trace width/space,layers and value. Our experience engineers will calculate following your instruction with Polar software.We may change trace width/space or stackup ,but please do not worry, if any changes,we will send you to approve before proceeding. Generally,the tolerance is 10%,and more accurate is 8% .All impedance boards ,we will test here and report.
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