Radeon RX 470
The Polaris 10 GPU in the Radeon RX 470 was not "cut" that much compared to the GPU configuration in the RX 480. Of the 36 Compute Units, four were disabled, which led to a decrease in the number of stream processors (shader ALUs, in the terminology AMD) and texture overlay units by 11%. At the same time, the GPU kept its back-end intact, including 32 ROPs and a 256-bit memory bus.
Of the two clock speeds that AMD indicates for its video cards - Base Clock (the frequency below which the GPU does not drop under typical load) and Boost Clock (limiting frequency) - the latter in the RX 470 has changed slightly (1206 MHz versus 1266 MHz for RX 480), but the first one was lowered immediately by 194 MHz.
But in general, such a large “fork” between the lower and upper values only reflects the tighter TDP limits of the video card compared to the Radeon RX 480 (120 and 150 W): in principle, the GPU in the RX 470 should work at significantly lower frequencies, but if the power reserve allows, jumps to higher values are acceptable.
Radeon RX 470 Specifications
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Chip
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Frequencies
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Memory
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Interface and TDP
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The RX 470 also lowered the effective frequency of the RAM - from 7/8 GHz, typical for the RX 480, to 6.6 GHz. Note that GDDR5 SDRAM chips with a bandwidth of 6.6 Gb / s per pin are not produced, and manufacturers solder chips designed for an effective frequency of 7 GHz, which can be easily restored by overclocking. The standard amount of RAM for the RX 470 is 4 GB, but double the amount is not unusual for graphics cards introduced by AMD partners.