RAM Patriot 4GB DDR3 1600MHz CL11 Signature Line (8x512) with Cooler:DDR3 memory module by Patriot with a capacity of 4 GB is designed for modern computers. It is designed for an operating frequency of 1600 MHz, at which it easily handles the CL11 timing. The nominal operating voltage is 1.5 V. Signature Line model series ensures top-notch compatibility and performance. This model is also fitted with a cooler. Each module is thoroughly tested by the manufacturer and so it comes with an extra guarantee.