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Some RAM drives when used with 32-bit operating systems (particularly 32-bit Microsoft Windows) on computers with IBM PC architecture allow memory above the 4 GB point in the memory map, if present, to be used; this memory is unmanaged and not normally accessible. [2] Software using unmanaged memory can cause stability problems.
The 5750 had one shader engine disabled (of 10), so had 720 stream processors, while the 5770 had all ten enabled. Additionally, the 5750 ran at 700 MHz and a lower voltage, while the 5770 used more power, but ran at 850 MHz. Both cards were normally found with 1 GB of GDDR5 memory, but 512 MB variants did exist, performance suffering somewhat.
A10 (Cobra), 50–77 MHz, 1995, single chip processor for Series i; A25/30 (Muskie), 125–154 MHz, 1996, multi chip, 4 way SMP for Series i; RS64 (Apache), 64-bit, 125 MHz, 1997 for large scale SMP systems Series i and Series p
Chip series Microarchitecture Fab Supported APIs AMD support Year introduced Introduced with Rendering Computing / ROCm Vulkan [15] OpenGL [16] Direct3D HSA OpenCL; Wonder
DDR and DDR2 memory is usually installed in single- or dual-channel configuration. DDR3 memory is installed in single-, dual-, tri-, and quad-channel configurations. Bit rates of multi-channel configurations are the product of the module bit-rate (given below) and the number of channels.
The highest-rated DDR2 modules in 2009 operate at 533 MHz (1066 MT/s), compared to the highest-rated DDR modules operating at 200 MHz (400 MT/s). At the same time, the CAS latency of 11.2 ns = 6 / (bus clock rate) for the best PC2-8500 modules is comparable to that of 10 ns = 4 / (bus clock rate) for the best PC-3200 modules.
Both versions of the memory buffer chip connect to the processor using version 2.0 of the Intel Scalable Memory Interconnect (SMI) interface, while supporting lockstep memory layouts for improved reliability. Up to four memory buffer chips can be connected to a processor, with up to six DIMM slots supported per each memory buffer chip. [45] [46]
ThinkStation is a brand of professional workstations from Lenovo announced in November 2007 and then released in January 2008. They are designed to be used for high-end computing and computer-aided design (CAD) tasks and primarily compete with other enterprise workstation lines, such as Dell's Precision, HP's Z line, Acer's Veriton K series, and Apple's Mac Pro line.