PC World - USA (2019-08)

(Antfer) #1
62 PCWorld AUGUST 2019

REVIEWS AMD RADEON RX 5700 AND 5700 XT


replacing in AMD’s product stack. (Radeon
boss Scott Herkelman confirmed that Vega
will be disappearing in The Full Nerd
interview at go.pcworld.com/sctt.)
While that table (see page 61 and above)
provides a helpful overview, note that you
cannot simply compare the number of
compute units and stream processors
between the Vega GPUs and the “Navi”
GPUs in the Radeon RX 5700 series.
Compared to AMD’s long-lasting GCN

architecture (which Vega is based on), the
new RDNA architecture introduces several
radical changes to the underlying GPU
design, unleashing significant hardware-level
overhauls to everything from the cache to the
graphics engine to the compute units
themselves. These new graphics cards
perform tasks differently from their
predecessors at a fundamental level.
We’re not going to get into the weeds of
redesigned cache hierarchies and SIMD

GPU RADEON RX
5700 XT

RADEON RX
5700

RADEON RX
VEGA^64

RADEON RX
VEGA^56
Peak SP
Performance

Up to 9.75
TFLOPS

Up to 7.95
TFLOPS

Up to 12.7 TFLOPS Up to 10.5
TFLOPS
Peak Half
Precision
Performance

Up to 19.5
TFLOPS

Up to 15.9
TFLOPS

Up to 25.3 TFLOPS Up to 21 TFLOPS

Peak Texture Fill-
Rate

Up to 304.8 GT/s Up to 248.4 GT/s Up to 395.8 GT/s Up to 330 GT/s

ROPs 64 64 64 64
Peak Pixel Fill-
Rate

Up to 121.9 GP/s Up to 110.4 GP/s Up to 98.9 GP/s Up to 94 GP/s

Memory 8GB GDDR6 8GB GDDR6 8GB HBM 8GB HBM
Memory
Bandwidth

448 GB/s 448 GB/s 483.8 GB/s 410 GB/s

Memory
Interface

256-bit 256-bit 2,048-bit 2,048-bit

Board Power 225 Watts 185 Watts 295 Watts 210 Watts

AMD RADEON RX 5700 XT/RX 5700/
RX VEGA^64 /R X VEGA^56 SPECS CONTINUED
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