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GPU Comparison
AMD Radeon RX 6900 XTX vs NVIDIA GeForce GT 645 OEM
AMD Radeon RX 6900 XTX vs NVIDIA GeForce GT 645 OEM
VS
AMD Radeon RX 6900 XTX
NVIDIA GeForce GT 645 OEM
We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XTX and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon RX 6900 XTX 's Advantages
Boost Clock2435MHz
More VRAM (16GB vs 1GB)
Larger VRAM bandwidth (576.0GB/s vs 91.87GB/s)
4832 additional rendering cores
NVIDIA GeForce GT 645 OEM 's Advantages
Lower TDP (102W vs 330W)
Score
Benchmark
FP32 (float)
Radeon RX 6900 XTX
+2688%
24.93 TFLOPS
GeForce GT 645 OEM
0.894 TFLOPS
Radeon RX 6900 XTX
VS
GeForce GT 645 OEM
Graphics Card
Unknown
Release Date
Apr 2012
Navi II
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
2075 MHz
Base Clock
-
2435 MHz
Boost Clock
-
2250 MHz
Memory Clock
957 MHz
Memory
16GB
Memory Size
1024MB
GDDR6
Memory Type
GDDR5
256bit
Memory Bus
192bit
576.0GB/s
Bandwidth
91.87GB/s
Render Config
-
SM Count
6
80
Compute Units
-
5120
Shading Units
288
320
TMUs
48
128
ROPs
24
-
Tensor Cores
-
80
RT Cores
-
128 KB per Array
L1 Cache
64 KB (per SM)
4 MB
L2 Cache
384 KB
Theoretical Performance
311.7 GPixel/s
Pixel Rate
9.312 GPixel/s
779.2 GTexel/s
Texture Rate
37.25 GTexel/s
49.87 TFLOPS
FP16 (half)
-
24.93 TFLOPS
FP32 (float)
894.0 GFLOPS
1.558 TFLOPS
FP64 (double)
74.50 GFLOPS
Graphics Processor
Navi 21
GPU Name
GF114
Navi 21 XTXH (215-121000247)
GPU Variant
-
RDNA 2.0
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
7 nm
Process Size
40 nm
26.8 billion
Transistors
1.95 billion
520 mm²
Die Size
332 mm²
Board Design
330W
TDP
102W
700 W
Suggested PSU
300 W
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
Outputs
2x DVI 1x mini-HDMI 1.3a
2x 8-pin
Power Connectors
-
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_0)
4.6
OpenGL
4.6
2.1
OpenCL
1.1
1.3
Vulkan
N/A
-
CUDA
2.1
6.5
Shader Model
5.1
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