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[[File:Sapphire Ultimate HD 4670 512MB - Qimonda HYB18H512321BF-10-93577.jpg|alt=|thumb|A 512-MBit [[Qimonda]] GDDR3 SDRAM package]]
[[File:SAMSUNG@QDDR3-SDRAM@256MBit@K5J55323QF-GC16 Stack-DSC01340-DSC01367 - ZS-retouched.jpg|thumb|Inside a Samsung GDDR3 256-MBit package]]
Graphics double data rate SDRAM is a type of specialized [[Double data rate|DDR]] [[Synchronous dynamic random-access memory|SDRAM]] designed to be used as the main memory of [[graphics processing unit]]s (GPUs). GDDR SDRAM is distinct from commodity types of DDR SDRAM such as DDR3, although they share some core technologies. Their primary characteristics are higher clock frequencies for both the DRAM core and I/O interface, which provides greater memory bandwidth for GPUs. As of
==={{Anchor|PSRAM}}Pseudostatic RAM===
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