Sapphire Radeon RX Vega 64 Nitro+ Review

Sapphire took its time getting a home-grown Radeon RX Vega card to market, and that's not a bad thing. While some competitors sneakily seeded production validation test boards (the ones that precede mass production), Sapphire kept to itself and made sure the Radeon RX Vega 64 Nitro+ was running well. When you think back to the issues those leaked cards demonstrated, Sapphire did well to keep its efforts quiet until the right time.


Of course, the factory making these cards got plenty of experience with AMD's reference Radeon RX Vega 64 boards. Sapphire goes even further than AMD, though, serving up its own cooler and a bespoke PCB.

The combination of custom design and aftermarket heat sink combine to create an almost-1.6kg behemoth. Wisely, Sapphire bundles a bracket to keep a sagging card from tugging on your PCI Express slow.

Measuring 31cm long, 13cm tall, and 4.2cm deep, this is technically a 2.5-slot card that ties up three slots worth of expansion on your motherboard. Additionally, a plate tacked on to the back side ties up another 0.5cm, meaning you'll need to leave room behind the Radeon RX Vega 64 Nitro+, too.

Dropping this card into your first motherboard slot may consequently result in a tight fit. You'll want to be careful with its height too, since the 13cm measurement doesn't take into account another 3cm or so for cables that stick straight out from the top.

The Sapphire logo under the backplate features RGB lighting, meaning it can be color-coordinated or switched off altogether.

Of course, Sapphire includes the requisite software for blinging its board out. As you can see, the interface is fairly straightforward.

The fan shroud is made of black plastic. There are two transparent rings around the larger fans, which sandwich a smaller one in the middle. Without power, this looks a little strange. But that changes once the card roars to life and Sapphire's RGB lighting makes its presence known. By default, you're greeted by a bright blue hue.

Up top, the card is dominated by no fewer than three eight-pin auxiliary power connectors and a back-lit Sapphire logo. Again, the standard setting is bright blue. Choosing any other color requires Sapphire's software.

Similar to AMD's reference Vega 64 cards, Sapphire implements a switch that lets you choose between two BIOS versions. The secondary build facilitates significantly lower power consumption, making the card quieter, cooler, and inevitably slower. Combined with WattMan’s three modes, which are Turbo (maximum power limit), Balanced (default), and Power Saver (minimum power limit), you have access to six different clock rate combinations. For more on this, check out our AMD Radeon Vega RX 64 8GB Review.

Looking at Sapphire's Radeon RX Vega 64 Nitro+ from the side reveals vertically-oriented heat sink fins that are bent a bit above the GPU. This guides airflow a bit, and increases the surface area for cooling. The back end is all but closed due to those vertical fins.

At the other end, a slot bracket hosts three DisplayPort 1.4-ready outputs and one HDMI 2.0 connector. There is no DVI-I connectivity, leaving more room for ventilation. Unfortunately, the way Sapphire positioned its heat sink fins, there is no real flow out the back. Instead, heated air exhausts down, toward your motherboard, and up, back into your case.

Model Sapphire RX Vega 64 Nitro+
AMD Radeon RX Vega 64
Radeon RX Vega FE
GeForce GTX 1080
GPUVega 10 XTXVega 10 XTXVega 10 XTXGP104
Die Size
486 mm²486 mm²486 mm²314 mm² 
Transistors12.5 billion12.5 billion
12.5 billion7.2 billion
Base/Boost Clock Rate
1423/1630 MHz1247/1546 MHz
1138/1382 MHz
1607/1733 MHz
Texture Units/ROPs
Pixel Fill Rate
104.3 GPix/s
98.9 GPix/s
88.4 GPix/s
114.2 GPix/s
Texture Fill Rate
417.3 GTex/s
395.8 GTex/s
353.8 GTex/s
257.1 GTex/s
Memory Interface
Memory Type
Memory Bandwidth
484 GB/s484 GB/s484 GB/s320 GB/s
Memory Speed
1.89 Gb/s1.89 Gb/s
1.89 Gb/s10 Gb/s
Memory Size
DX12 Feature Level12_112_1
PCIe Power Connectors
(3)× 8-pin(2) 8-pin(2) 8-pin(1) 8-pin

Test System and Methodology

We introduced our new test system and methodology in How We Test Graphics Cards. If you'd like more detail about our general approach, check that piece out. We've upgraded the CPU and the cooling system since then to make sure that nothing's holding back graphics cards as fast as this one.

The hardware used in our lab includes:

Test Equipment and Environment
SystemIntel Core i7-6900K @ 4.3 GHz
MSI X99S XPower Gaming Titanium
Corsair Vengeance DDR4-3200
1x 1TB Toshiba OCZ RD400 (M.2, System SSD)
2x 960GB Toshiba OCZ TR150 (Storage, Images)
be quiet Dark Power Pro 11, 850W PSU
Windows 10 Pro (All Updates)
CoolingAlphacool Eisblock XPX
5x be quiet! Silent Wings 3 PWM (Closed Case Simulation)
Thermal Grizzly Kryonaut (Used when Switching Coolers)
PC CaseLian Li PC-T70 with Extension Kit and Mods
Configurations: Open Benchtable, Closed Case
MonitorEizo EV3237-BK
Power Consumption MeasurementContact-free DC Measurement at PCIe Slot (Using a Riser Card)
Contact-free DC Measurement at External Auxiliary Power Supply Cable
Direct Voltage Measurement at Power Supply
2 x Rohde & Schwarz HMO 3054, 500 MHz Digital Multi-Channel Oscilloscope with Storage Function
4 x Rohde & Schwarz HZO50 Current Probe (1mA - 30A, 100 kHz, DC)
4 x Rohde & Schwarz HZ355 (10:1 Probes, 500 MHz)
1 x Rohde & Schwarz HMC 8012 Digital Multimeter with Storage Function
Thermal Measurement1 x Optris PI640 80 Hz Infrared Camera + PI Connect
Real-Time Infrared Monitoring and Recording
Noise MeasurementNTI Audio M2211 (with Calibration File, Low Cut at 50Hz)
Steinberg UR12 (with Phantom Power for Microphones)
Creative X7, Smaart v.7
Custom-Made Proprietary Measurement Chamber, 3.5 x 1.8 x 2.2m (L x D x H)
Perpendicular to Center of Noise Source(s), Measurement Distance of 50cm
Noise Level in dB(A) (Slow), Real-time Frequency Analyzer (RTA)
Graphical Frequency Spectrum of Noise

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