Sapphire Radeon RX 590 Nitro+ Special Edition 8 GB Review 89

Sapphire Radeon RX 590 Nitro+ Special Edition 8 GB Review

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AMD today announced its Radeon RX 590 graphics card. This is an unexpected product launch given the current competitive environment, and nobody expected something new from AMD until 2019. The Radeon RX 590 is designed for the vast majority of PC gamers who still play at Full HD (1080p) resolution and is priced under $300. With a number of AAA game launches lined up for the holiday, AMD is going after the crowd that's either upgrading or gifting a graphics card for gameplay at 1080p with all details maxed out in every game. Rival NVIDIA hasn't managed to address this segment with its RTX "Turing" architecture yet, and there is a big price-performance gap between its "Pascal" GeForce GTX 1060 and $360 GTX 1070, which AMD is targeting with the RX 590.

The Radeon RX 590 packs none of the exotic HBM tech from its RX Vega siblings and uses existing GDDR5 memory, which has AMD and its partners enjoy more headroom in which to adjust prices. It is based on the "Polaris 30" silicon, which is essentially a "Polaris 10" die built on the latest 12 nm FinFET node at GlobalFoundries, yielding significant energy-efficiency dividends AMD is cashing in on to increase clock speeds by 15 percent. The engine clock has been dialed up to 1545 MHz, compared to the 1340 MHz of the RX 580.

Unlike the RX 580, the new RX 590 only comes with 8 GB of video memory (no 4 GB variant), and the card's memory setup is unchanged: 8 Gbps GDDR5 over a 256-bit wide memory interface, which yields 256 GB/s of bandwidth. The "Polaris 30" silicon features the same core-configuration as its predecessors, with 2,304 stream processors spread across 36 compute units, 144 TMUs, and 32 ROPs. There's still no ray-tracing machinery to rival RTX, or other new features.

In this review, we're taking a look at the Sapphire Radeon RX 590 NITRO+ Special Edition. Thanks to the pin-compatibility between Polaris 30 and its older siblings, Sapphire is reusing the PCB and cooler design from its RX 580 NITRO+ Special Edition. The card draws power from an 8-pin and a 6-pin PCIe power connector. There's also a factory-overclock on tap, which has the card running at 1560 MHz out of the box. Memory is overclocked to 8.40 Gbps. The card offers dual BIOS, and while the main BIOS packs the advertised speeds, a second "Silent" BIOS runs it at lower clock speeds, which triggers the existing fan-curve less, resulting in a generally quieter card.

Radeon RX 590 Market Segment Analysis
RX 470$165 204832932 MHz1216 MHz1650 MHzEllesmere5700M4 GB, GDDR5, 256-bit
RX 570$150 2048321168 MHz1244 MHz1750 MHzEllesmere5700M4 GB, GDDR5, 256-bit
GTX 970$235 1664561051 MHz1178 MHz1750 MHzGM2045200M4 GB, GDDR5, 256-bit
RX 480$230 2304321120 MHz1266 MHz2000 MHzEllesmere5700M8 GB, GDDR5, 256-bit
RX 580$200 2304321257 MHz1340 MHz2000 MHzEllesmere5700M8 GB, GDDR5, 256-bit
RX 590$2802304321469 MHz1545 MHz2000 MHzPolaris 305700M8 GB, GDDR5, 256-bit
Sapphire RX
590 Nitro+
$2802304321469 MHz1560 MHz2000 MHzPolaris 305700M8 GB, GDDR5, 256-bit
GTX 1060 3 GB$200 1152481506 MHz1708 MHz2002 MHzGP1064400M3 GB, GDDR5, 192-bit
GTX 1060$230 1280481506 MHz1708 MHz2002 MHzGP1064400M6 GB, GDDR5, 192-bit
GTX 980 Ti$390 2816961000 MHz1075 MHz1750 MHzGM2008000M6 GB, GDDR5, 384-bit
R9 Fury X$380 4096641050 MHzN/A500 MHzFiji8900M4 GB, HBM, 4096-bit
GTX 1070$360 1920641506 MHz1683 MHz2002 MHzGP1047200M8 GB, GDDR5, 256-bit
RX Vega 56$350 3584641156 MHz1471 MHz800 MHzVega 1012500M8 GB, HBM2, 2048-bit
GTX 1070 Ti$3802432641607 MHz1683 MHz2000 MHzGP1047200M8 GB, GDDR5, 256-bit
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