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K4D261638F is 128 bit synchronous data rate Dynamic RAM, fabricated with SAMSUNGs CMOS technology. Synchronous features with Data Strobe allow high performance up to 1.6GB/s/chip. I/O transactions are possible on both edges of the clock cycle. It's nominal frequency is 250 MHz.
The box.
And last but not least, Prolink's GeForce 6600 128 MB live in action.