AMD Radeon RX 6900 XTX vs AMD Radeon HD 7990
GPU Specs Compare
Graphics Card
Release Date
Unknown
Apr 2013
Generation
Navi II
Southern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
2075 MHz
950 MHz
Boost Clock
2435 MHz
1000 MHz
Memory Clock
2250 MHz
1500 MHz
Memory
Memory Size
16GB
3GB
Memory Type
GDDR6
GDDR5
Memory Bus
256bit
384bit
Bandwidth
576.0GB/s
288.0GB/s
Render Config
Compute Units
80
32
Shading Units
5120
2048
TMUs
320
128
ROPs
128
32
RT Cores
80
-
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
4 MB
768 KB
L3 Cache
128 MB
-
Theoretical Performance
Pixel Rate
311.7 GPixel/s
32.00 GPixel/s
Texture Rate
779.2 GTexel/s
128.0 GTexel/s
FP16 (half)
49.87 TFLOPS
-
FP32 (float)
24.93 TFLOPS
4.096 TFLOPS
FP64 (double)
1.558 TFLOPS
1024 GFLOPS
Graphics Processor
GPU Name
Navi 21
Malta
GPU Variant
Navi 21 XTXH(215-121000247)
Malta XT(215-0849026)
Architecture
RDNA 2.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
7 nm
28 nm
Transistors
26.8 billion
4.313 billion
Die Size
520 mm²
365 mm²
Board Design
TDP
330W
375W
Suggested PSU
700 W
750 W
Outputs
1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C
1x DVI4x mini-DisplayPort 1.2
Power Connectors
2x 8-pin
2x 8-pin
Graphics Features
DirectX
12 Ultimate (12_2)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.1
1.2
Vulkan
1.3
1.2
Shader Model
6.5
5.1