Radeon RX 6950 XT vs Radeon HD 6990
We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6950 XT and 2GB VRAM Radeon HD 6990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6950 XT 's Advantages
Released 11 years and 2 months late
Boost Clock2310MHz
More VRAM (16GB vs 2GB)
Larger VRAM bandwidth (576.0GB/s vs 160.0GB/s)
3584 additional rendering cores
Lower TDP (335W vs 375W)
Score
Benchmark
FP32 (float)
Radeon RX 6950 XT
+827%
23650
Radeon HD 6990
2550
Graphics Card
May 2022
Release Date
Mar 2011
Navi II
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
1860 MHz
Base Clock
-
2310 MHz
Boost Clock
-
2250 MHz
Memory Clock
1250 MHz
Memory
16GB
Memory Size
2GB
GDDR6
Memory Type
GDDR5
256bit
Memory Bus
256bit
576.0GB/s
Bandwidth
160.0GB/s
Render Config
80
Compute Units
24
5120
Shading Units
1536
320
TMUs
96
128
ROPs
32
80
RT Cores
-
128 KB per Array
L1 Cache
8 KB (per CU)
4 MB
L2 Cache
512 KB
128 MB
L3 Cache
-
Theoretical Performance
295.7 GPixel/s
Pixel Rate
26.56 GPixel/s
739.2 GTexel/s
Texture Rate
79.68 GTexel/s
47.31 TFLOPS
FP16 (half)
-
23.65 TFLOPS
FP32 (float)
2.550 TFLOPS
1478 GFLOPS
FP64 (double)
637.4 GFLOPS
Board Design
335W
TDP
375W
700 W
Suggested PSU
750 W
1x HDMI 2.1
2x DisplayPort 1.4a
Outputs
1x DVI
4x mini-DisplayPort 1.2
2x 8-pin
Power Connectors
2x 8-pin
Graphics Processor
Navi 21
GPU Name
Antilles
Navi 21 KXTX
(215-121000289)
GPU Variant
Antilles XT
(215-0807027)
RDNA 2.0
Architecture
TeraScale 3
TSMC
Foundry
TSMC
7 nm
Process Size
40 nm
26.8 billion
Transistors
2.64 billion
520 mm²
Die Size
389 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
2.1
OpenCL
1.2
1.3
Vulkan
N/A
6.5
Shader Model
5.0
