AMD Radeon HD 6990 vs AMD Radeon Pro V620
GPU · Specs Compare
Graphics Card
Release Date
Mar 2011
Nov 2021
Generation
Northern Islands
Radeon Pro
Type
Desktop
Desktop
Bus Interface
PCIe 2.0 x16
PCIe 4.0 x16
Clock Speeds
Memory Clock
1250 MHz
2000 MHz
Base Clock
—
1825 MHz
Boost Clock
—
2200 MHz
Memory
Memory Size
2GB
32GB
Memory Type
GDDR5
GDDR6
Memory Bus
256bit
256bit
Bandwidth
160.0GB/s
512.0GB/s
Render Config
Compute Units
24
72
Shading Units
1536
4608
TMUs
96
288
ROPs
32
128
L1 Cache
8 KB (per CU)
128 KB per Array
L2 Cache
512 KB
4 MB
RT Cores
—
72
L3 Cache
—
128 MB
Theoretical Performance
Pixel Rate
26.56 GPixel/s
281.6 GPixel/s
Texture Rate
79.68 GTexel/s
633.6 GTexel/s
FP32 (float)
2.550 TFLOPS
20.28 TFLOPS
FP64 (double)
637.4 GFLOPS
1267 GFLOPS
FP16 (half)
—
40.55 TFLOPS
Graphics Processor
GPU Name
Antilles
Navi 21
GPU Variant
Antilles XT(215-0807027)
Navi 21 XT(215-121000177)
Architecture
TeraScale 3
RDNA 2.0
Foundry
TSMC
TSMC
Process Size
40 nm
7 nm
Transistors
2.64 billion
26.8 billion
Die Size
389 mm²
520 mm²
Board Design
TDP
375W
300W
Suggested PSU
750 W
700 W
Outputs
1x DVI4x mini-DisplayPort 1.2
No outputs
Power Connectors
2x 8-pin
2x 8-pin
Graphics Features
DirectX
11.2 (11_0)
12 Ultimate (12_2)
OpenGL
4.4
4.6
OpenCL
1.2
2.1
Vulkan
N/A
1.3
Shader Model
5.0
6.5
▲ Specs Compare
Data sourced from official specifications and benchmark tests.