Radeon RX 7900 XT vs Radeon R9 285X
We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7900 XT and 3GB VRAM Radeon R9 285X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 7900 XT Advantages
Boost Clock2394MHz
More VRAM (20GB vs 3GB)
Larger VRAM bandwidth (800.0GB/s vs 264.0GB/s)
3328 additional rendering cores
Radeon R9 285X Advantages
Lower TDP (200W vs 300W)
Score
Benchmark
FP32 (float)
Radeon RX 7900 XT
+1154%
51480
Radeon R9 285X
4104
Graphics Card
Nov 2022
Release Date
Unknown
Navi III
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
1387 MHz
Base Clock
-
2394 MHz
Boost Clock
-
2500 MHz
Memory Clock
1375 MHz
Memory
20GB
Memory Size
3GB
GDDR6
Memory Type
GDDR5
320bit
Memory Bus
384bit
800.0GB/s
Bandwidth
264.0GB/s
Render Config
84
Compute Units
32
5376
Shading Units
2048
336
TMUs
128
192
ROPs
32
84
RT Cores
-
256 KB per Array
L1 Cache
16 KB (per CU)
6 MB
L2 Cache
768 KB
80 MB
L3 Cache
-
Theoretical Performance
459.6 GPixel/s
Pixel Rate
32.06 GPixel/s
804.4 GTexel/s
Texture Rate
128.3 GTexel/s
103.0 TFLOPS
FP16 (half)
-
51.48 TFLOPS
FP32 (float)
4.104 TFLOPS
1.609 TFLOPS
FP64 (double)
-
Board Design
300W
TDP
200W
700 W
Suggested PSU
550 W
1x HDMI 2.1a
2x DisplayPort 2.1
1x USB Type-C
2x DisplayPort 2.1
1x USB Type-C
Outputs
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
1x HDMI 1.4a
1x DisplayPort 1.2
2x 8-pin
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Processor
Navi 31
GPU Name
Tonga
Navi 31 XT
(215-145000156)
(215-145000156)
GPU Variant
Tonga XT
(215-0851313)
(215-0851313)
RDNA 3.0
Architecture
GCN 3.0
TSMC
Foundry
TSMC
5 nm
Process Size
28 nm
57.7 billion
Transistors
5 billion
529 mm²
Die Size
366 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (12_0)
4.6
OpenGL
4.6
2.2
OpenCL
2.0
1.3
Vulkan
1.2
6.7
Shader Model
6.3
