AMD Radeon RX 6900 XT vs AMD Radeon HD 6990
GPU · Specs Compare
Graphics Card
Release Date
Oct 2020
Mar 2011
Generation
Navi II
Northern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 2.0 x16
Clock Speeds
Base Clock
1825 MHz
—
Boost Clock
2250 MHz
—
Memory Clock
2000 MHz
1250 MHz
Memory
Memory Size
16GB
2GB
Memory Type
GDDR6
GDDR5
Memory Bus
256bit
256bit
Bandwidth
512.0GB/s
160.0GB/s
Render Config
Compute Units
80
24
Shading Units
5120
1536
TMUs
320
96
ROPs
128
32
RT Cores
80
—
L1 Cache
128 KB per Array
8 KB (per CU)
L2 Cache
4 MB
512 KB
L3 Cache
128 MB
—
Theoretical Performance
Pixel Rate
288.0 GPixel/s
26.56 GPixel/s
Texture Rate
720.0 GTexel/s
79.68 GTexel/s
FP16 (half)
46.08 TFLOPS
—
FP32 (float)
23.04 TFLOPS
2.550 TFLOPS
FP64 (double)
1440.0 GFLOPS
637.4 GFLOPS
Graphics Processor
GPU Name
Navi 21
Antilles
GPU Variant
Navi 21 XTX(215-121000167)
Antilles XT(215-0807027)
Architecture
RDNA 2.0
TeraScale 3
Foundry
TSMC
TSMC
Process Size
7 nm
40 nm
Transistors
26.8 billion
2.64 billion
Die Size
520 mm²
389 mm²
Board Design
TDP
300W
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)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
2.1
1.2
Vulkan
1.4
N/A
Shader Model
6.8
5.0
Benchmark
3DMark Time Spy
20,764
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.