PowerColor Red Devil RX Vega 64 8GB HBM2 Review: Cooling Vega Right

If you asked us to point you in the direction of a well-equipped Radeon RX Vega 64 card, and if there was more differentiation between the boards that do exist today, we could definitely recommend checking out PowerColor's Red Devil RX Vega 64 8GB HBM2. Like Sapphire's Radeon RX Vega 64 Nitro+, the PowerColor card is particularly eye-catching. And it lights up, if you're a proponent of drawing attention to flagship-class graphics hardware in a windowed case.

Unfortunately, today's market makes it almost impossible to distinguish between one Radeon RX Vega 64 or another. You may find a handful of models in stock (an improvement compared to a few weeks ago), but they still start just under $800 and reach as high as $900. While PowerColor does land toward the bottom of that range, you're still paying a $200+ premium over many GeForce GTX 1080 models. Right out of the gate, PowerColor is fighting an uphill battle against less expensive and sometimes faster competition.

Unboxing, Look, & Feel

Weighing in at 1409 grams, this card lands just below Sapphire's monstrous flagship, which proved to be a an exhibition of sorts and is no longer available. PowerColor's solution is real though, and it's a massive beast just like Asus' ROG Strix Radeon RX Vega 64 8GB OC Edition. Similar to that card, the Red Devil measures 30.2cm long. A height of 12.7cm from the motherboard slot's top edge to the top of the fan shroud also matches what you get from Asus. But a depth of 5.2cm is notably wider. Hopefully that translates to even better cooling performance.

Three 90mm fans are mounted in 92mm openings. With their special shape, a total of nine blades per fan provide powerful throughput and less turbulence, generating a bit more static pressure. This should prove complementary to the deep thermal solution.

The backplate is characterized by a printed Red Devil logo. That plate doesn't help with cooling at all; it's primarily meant to look good and give the heavy card some rigidity.

Plan for an extra 5mm of clearance (at least) behind the Red Devil RX Vega 64. This may cause problems on some motherboards, particularly if the heat sink/backplate intrude on an occupied expansion slot or large CPU cooler.

As we can see from the bottom, PowerColor employs vertically-oriented fins. At the expense of occupying a third slot with its 2.5-slot design, the company does provide a lot more surface area for cooling.

The top side shows that PowerColor stays true to itself in the Red Devil's design. In addition to a familiar dark metal cover on the red ABS shell, there is an illuminated Red Devil logo in the middle. A pair of eight-pin power connectors are position at the end of the board. They're rotated 180 degrees and recessed as well.

Apart from three 6mm heat pipes and a single 8mm pipe, the almost completely closed back of the card reveals nothing conspicuous.

The rear bracket plays host to four display outputs. A pair of HDMI 2.0 interfaces is ideal for anyone with a VR HMD, while two DisplayPort 1.4 connectors make multi-monitor configurations easy. DVI is noticeably missing.

Unfortunately, we also have to bring up an issue that affected our test results. While our press sample was sealed by the manufacturer, it became clear that this card had been used and dismantled before landing in our lab. The amount of thermal paste we found on the GPU package would have been sufficient for two or more cards, and was nearly counterproductive the way it arrived. We fixed this by cleaning the card and applying much better stuff in moderation.

We realigned the heat pads, and even repaired the partially destroyed ones with similar replacements. In turn, we were rewarded with a four to five degree lower GPU temperature and significantly cooler VRM readings. Hopefully, that gets us close to PowerColor's stock performance, fresh from the factory.

Although PowerColor's official documentation claims a 1607 MHz boost clock, GPU-Z reports 1630 MHz. That specification is mostly wishful thinking though, given the Red Devil's power limit.

In comparison to the relevant reference cards the data looks as follows:

Model Radeon RX Vega 64PowerColor Red Devil RX Vega 64
Radeon RX Vega 56
GeForce GTX 1070 Ti
GeForce GTX 1080
GPUVega 10Vega 10Vega 10GP104
GP104
Die Size
486 mm²486 mm²486 mm²314 mm²314 mm² 
Transistors12.5 billion12.5 billion12.5 billion7.2 billion7.2 billion
Base/Boost Clock Rate1274/1546 MHz1274/1630 MHz
1156/1471 MHz1607/1683 MHz1607/1733 MHz
Shaders/SIMDs4096/644096/643584/562432/19
2560/20
Texture Units/ROPS
256/64256/64
224/64152/64
160/64
Pixel Fill Rate
99 GPix/s104 GPix/s
94 GPix/s108 GPix/s114 GPix/s
Texture Fill Rate396 GT/s417 GT/s
330 GT/s244 GT/s257.1 GT/s
Memory Interface
2048-bit2048-bit2048-bit256-bit256-bit
Memory Type
HBM2HBM2HBM2GDDR5
GDDR5X
Memory Bandwidth
484 GB/s484 GB/s410 GB/s256 GB/s
320 GB/s
Memory Speed1.89 Gb/s1.89 Gb/s1.6 Gb/s8 Gb/s
10 Gb/s
Memory Size8GB
8GB
8GB
8GB
8GB
DX12 Feature Level12_1
12_1
12_112_1
12_1
PCIe Power Connectors2x 8-Pin2x 8-Pin2x 8-Pin1x 8-Pin1x 8-Pin
TDP
295W
295W
210W180W
180W

Test System & Measurement Methods

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 System
Hardware
Intel 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)
Cooling
Alphacool Eisblock XPX
5x be quiet! Silent Wings 3 PWM (Closed Case Simulation)
Thermal Grizzly Kryonaut (Used when Switching Coolers)
Case
Lian 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 Measurement
1 x Optris PI640 80 Hz Infrared Camera + PI Connect
Real-Time Infrared Monitoring and Recording

Noise Measurement
NTI 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

Specifications

GPU (Code-name)Vega 10
Shader Units4096
Base & Boost Clocks1630 MHz
Memory Size & Type8GB HBM2
Memory Clock1.89 Gb/s
Memory Bandwidth484 GB/s
Fans(3) 90mm
Ports(2) HDMI 2.0, (2) DisplayPort 1.4
Power Connectors(2) 8-pin PCIe
Dimensions (LxHxD)30.2 x 12.7 x 5.2cm
Weight1409g
Warranty2 Years

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