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Many modern GPUs rely on VRAM. In contrast, a GPU that does not use VRAM, and relies instead on system RAM, is said to have a unified memory architecture, or shared graphics memory. System RAM and VRAM have been segregated due to the bandwidth requirements of GPUs, [2] [3] and to achieve lower latency, since VRAM is physically closer to the GPU ...
Dual-ported video RAM (VRAM) is a dual-ported RAM variant of dynamic RAM (DRAM), which was once commonly used to store the Framebuffer in Graphics card, . Dual-ported RAM allows the CPU to read and write data to memory as if it were a conventional DRAM chip, while adding a second port that reads out data.
Video memory was shared with the first 128 KiB of RAM. The exact size of the video memory could be reconfigured by software to meet the needs of the current program. An early hybrid system was the Commodore Amiga which could run as a shared memory system, but would load executable code preferentially into non-shared "fast RAM" if it was available.
Video RAM (VRAM) is a common form of dual-ported dynamic RAM mostly used for video memory, allowing the central processing unit (CPU) to draw the image at the same time the video hardware is reading it out to the screen. Apart from VRAM, most other types of dual-ported RAM are based on static RAM technology.
The central processing unit (CPU) consists of two x86-64 quad-core modules for a total of eight cores, [43] which are based on the Jaguar CPU architecture from AMD. [28] Each core has 32 kB L1 instruction and data caches, with one shared 2 MB L2 cache per four-core module. [44] The CPU's base clock speed is said [citation needed] to be 1.6 GHz.
Additional RAM is integrated with the GPU (including a 1 MB framebuffer) and SPU (512 KB), see below for details. Cache RAM for CPU core and CD-ROM. See the relevant sections for details. Flash RAM support through the use of memory cards, see below. BIOS stored on 512 KB ROM
Scratchpad (SPR) is extended area of memory visible to the EE CPU. This extended memory provides 16 kilobytes of fast RAM available to be used by the application. Scratchpad memory can be used to store temporary data that is waiting to be sent via DMA or for any other temporary storage that the programmer can define.
Increasing memory bandwidth, even while increasing memory latency, may improve the performance of a computer system with multiple processors and/or multiple execution threads. Higher bandwidth will also boost performance of integrated graphics processors that have no dedicated video memory but use regular RAM as VRAM.