Radeon RX 6600 XT vs Radeon HD 2900 XT
We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 512MB VRAM Radeon HD 2900 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6600 XT 's Advantages
Released 14 years and 2 months late
Boost Clock2589MHz
More VRAM (8GB vs 512GB)
Larger VRAM bandwidth (256.0GB/s vs 106.0GB/s)
1728 additional rendering cores
Lower TDP (160W vs 215W)
Score
Benchmark
FP32 (float)
Radeon RX 6600 XT
+2126%
10600
Radeon HD 2900 XT
476
Graphics Card
Jul 2021
Release Date
May 2007
Navi II
Generation
Radeon R600
Desktop
Type
Desktop
PCIe 4.0 x8
Bus Interface
PCIe 1.0 x16
Clock Speeds
1968 MHz
Base Clock
-
2589 MHz
Boost Clock
-
2000 MHz
Memory Clock
828 MHz
Memory
8GB
Memory Size
512MB
GDDR6
Memory Type
GDDR3
128bit
Memory Bus
512bit
256.0GB/s
Bandwidth
106.0GB/s
Render Config
32
Compute Units
4
2048
Shading Units
320
128
TMUs
16
64
ROPs
16
32
RT Cores
-
128 KB per Array
L1 Cache
-
2 MB
L2 Cache
256 KB
32 MB
L3 Cache
-
Theoretical Performance
165.7 GPixel/s
Pixel Rate
11.89 GPixel/s
331.4 GTexel/s
Texture Rate
11.89 GTexel/s
21.21 TFLOPS
FP16 (half)
-
10.60 TFLOPS
FP32 (float)
475.5 GFLOPS
662.8 GFLOPS
FP64 (double)
-
Board Design
160W
TDP
215W
450 W
Suggested PSU
550 W
1x HDMI 2.1
3x DisplayPort 1.4a
Outputs
2x DVI
1x S-Video
1x 8-pin
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Processor
Navi 23
GPU Name
R600
Navi 23 XT
(215-130000006)
GPU Variant
R600 XT
(215RGMDKA13FG)
RDNA 2.0
Architecture
TeraScale
TSMC
Foundry
TSMC
7 nm
Process Size
80 nm
11.06 billion
Transistors
0.72 billion
237 mm²
Die Size
420 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
10.0 (10_0)
4.6
OpenGL
3.3 (full)
4.0 (partial)
2.1
OpenCL
N/A
1.3
Vulkan
N/A
6.7
Shader Model
4.0
