NVIDIA GeForce RTX 3080 Ti 20 GB vs AMD Radeon HD 6990
GPU · Specs Compare
Graphics Card
Release Date
Jun 2025
Mar 2011
Generation
Navi IV
Northern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 5.0 x16
PCIe 2.0 x16
Clock Speeds
Base Clock
1700 MHz
—
Boost Clock
3130 MHz
—
Memory Clock
2518 MHz
1250 MHz
Memory
Memory Size
8GB
2GB
Memory Type
GDDR6
GDDR5
Memory Bus
128bit
256bit
Bandwidth
322.3GB/s
160.0GB/s
Render Config
SM Count
80
—
Compute Units
32
24
Shading Units
2048
1536
TMUs
128
96
ROPs
64
32
Tensor Cores
320
—
RT Cores
32
—
L1 Cache
128 KB (per SM)
8 KB (per CU)
L2 Cache
4 MB
512 KB
L3 Cache
32 MB
—
Theoretical Performance
Pixel Rate
200.3 GPixel/s
26.56 GPixel/s
Texture Rate
400.6 GTexel/s
79.68 GTexel/s
FP16 (half)
51.28 TFLOPS
—
FP32 (float)
25.64 TFLOPS
2.550 TFLOPS
FP64 (double)
801.3 GFLOPS
637.4 GFLOPS
Graphics Processor
GPU Name
Navi 44
Antilles
GPU Variant
Navi 44 XT(215-176400102)
Antilles XT(215-0807027)
Architecture
RDNA 4.0
TeraScale 3
Foundry
TSMC
TSMC
Process Size
4 nm
40 nm
Transistors
29.7 billion
2.64 billion
Die Size
199 mm²
389 mm²
Board Design
TDP
150W
375W
Suggested PSU
450 W
750 W
Outputs
1x HDMI 2.1b2x DisplayPort 2.1a
1x DVI4x mini-DisplayPort 1.2
Power Connectors
1x 8-pin
2x 8-pin
Graphics Features
DirectX
12 Ultimate (12_2)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
2.2
1.2
Vulkan
1.3
N/A
CUDA
8.6
—
Shader Model
6.8
5.0
Benchmark
Blender
5,956
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.