Radeon RX 6600 XT vs Radeon HD 8950 OEM
We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 3GB VRAM Radeon HD 8950 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6600 XT 's Advantages
Released 8 years and 6 months late
Boost Clock has increased by 180% (2589MHz vs 925MHz)
More VRAM (8GB vs 3GB)
Larger VRAM bandwidth (256.0GB/s vs 240.0GB/s)
256 additional rendering cores
Lower TDP (160W vs 200W)
Score
Benchmark
FP32 (float)
Radeon RX 6600 XT
+219%
10600
Radeon HD 8950 OEM
3315
Graphics Card
Jul 2021
Release Date
Jan 2013
Navi II
Generation
Sea Islands
Desktop
Type
Desktop
PCIe 4.0 x8
Bus Interface
PCIe 3.0 x16
Clock Speeds
1968 MHz
Base Clock
850 MHz
2589 MHz
Boost Clock
925 MHz
2000 MHz
Memory Clock
1250 MHz
Memory
8GB
Memory Size
3GB
GDDR6
Memory Type
GDDR5
128bit
Memory Bus
384bit
256.0GB/s
Bandwidth
240.0GB/s
Render Config
32
Compute Units
28
2048
Shading Units
1792
128
TMUs
112
64
ROPs
32
32
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
2 MB
L2 Cache
768 KB
32 MB
L3 Cache
-
Theoretical Performance
165.7 GPixel/s
Pixel Rate
29.60 GPixel/s
331.4 GTexel/s
Texture Rate
103.6 GTexel/s
21.21 TFLOPS
FP16 (half)
-
10.60 TFLOPS
FP32 (float)
3.315 TFLOPS
662.8 GFLOPS
FP64 (double)
828.8 GFLOPS
Board Design
160W
TDP
200W
450 W
Suggested PSU
550 W
1x HDMI 2.1
3x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.4a
2x mini-DisplayPort 1.2
1x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
Navi 23
GPU Name
Tahiti
Navi 23 XT
(215-130000006)
GPU Variant
Tahiti PRO
(215-0821056)
RDNA 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
7 nm
Process Size
28 nm
11.06 billion
Transistors
4.313 billion
237 mm²
Die Size
352 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.1
OpenCL
1.2
1.3
Vulkan
1.2
6.7
Shader Model
5.1
