began selling Radeon branded DDR3 SDRAM to support the higher bandwidth needs of AMD's APUs. While the RAM is sold by AMD, it was manufactured by Patriot Memory and VisionTek. This was later followed by higher speeds of gaming oriented DDR3 memory in 2013. Radeon branded DDR4 SDRAM memory was released in 2015, despite no AMD CPUs or APUs supporting DDR4 at the time. AMD noted in 2017 that these products are "mostly distributed in Eastern Europe" and that it continues to be active in the business. Solid-state drives AMD announced in 2014 it would sell Radeon branded solid-state drives manufactured by OCZ with capacities up to 480 GB and using the SATA interface. Technologies CPU hardware technologies found in AMD CPU/APU and other products include: HyperTransport – a high-bandwidth, low-latency system bus used in AMD's CPU and APU products Infinity Fabric – a derivative of HyperTransport used as the communication bus in AMD's Zen microarchitecture Graphics hardware technologies found in AMD GPU products include: AMD Eyefinity – facilitates multi-monitor setup of up to 6 monitors per graphics card AMD FreeSync – display synchronization based on the VESA Adaptive Sync standard AMD TrueAudio – acceleration of audio calculations AMD XConnect – allows the use of External GPU enclosures through Thunderbolt 3 AMD CrossFire – multi-GPU technology allowing the simultaneous use of multiple GPUs Unified Video Decoder (UVD) – acceleration of video decompression (decoding) Video Coding Engine (VCE) – acceleration of video compression (encoding) Software AMD has made considerable efforts towards opening its software tools above the firmware level in the past decade. For the following mentions, software not expressely stated free can be assumed to be proprietary. Distribution AMD Radeon Software is the default channel for official software distribution from AMD. It includes both free and proprietary software components, and supports both Microsoft Windows and Linux. Software by type CPU AOCC is AMD's optimizing proprietary C/C++ compiler based on LLVM and available for Linux. AMDuProf is AMD's CPU performance and Power profiling tool suite, available for Linux and Windows. AMD has also taken an active part in developing coreboot, an open-source project aimed at replacing the proprietary BIOS firmware. This cooperation ceased in 2013, but AMD has indicated recently that it is considering releasing source code so that Ryzen can be compatible with coreboot in the future. GPU Most notable public AMD software is on the GPU side. AMD has