Radeon RX 7900 XT vs GeForce GT 640 OEM
We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7900 XT and 2GB VRAM GeForce GT 640 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 7900 XT 's Advantages
Released 10 years and 7 months late
Boost Clock2394MHz
More VRAM (20GB vs 2GB)
Larger VRAM bandwidth (800.0GB/s vs 28.51GB/s)
4992 additional rendering cores
GeForce GT 640 OEM 's Advantages
Lower TDP (50W vs 300W)
Score
Benchmark
FP32 (float)
Radeon RX 7900 XT
+8311%
51480
GeForce GT 640 OEM
612
Graphics Card
Nov 2022
Release Date
Apr 2012
Navi III
Generation
GeForce 600
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
891 MHz
Memory
20GB
Memory Size
2GB
GDDR6
Memory Type
DDR3
320bit
Memory Bus
128bit
800.0GB/s
Bandwidth
28.51GB/s
Render Config
84
Compute Units
-
5376
Shading Units
384
336
TMUs
32
192
ROPs
16
84
RT Cores
-
256 KB per Array
L1 Cache
16 KB (per SMX)
6 MB
L2 Cache
256 KB
80 MB
L3 Cache
-
Theoretical Performance
459.6 GPixel/s
Pixel Rate
6.376 GPixel/s
804.4 GTexel/s
Texture Rate
25.50 GTexel/s
103.0 TFLOPS
FP16 (half)
-
51.48 TFLOPS
FP32 (float)
612.1 GFLOPS
1.609 TFLOPS
FP64 (double)
25.50 GFLOPS
Board Design
300W
TDP
50W
700 W
Suggested PSU
250 W
1x HDMI 2.1a
2x DisplayPort 2.1
1x USB Type-C
Outputs
1x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
2x 8-pin
Power Connectors
None
Graphics Processor
Navi 31
GPU Name
GK107
Navi 31 XT
(215-145000156)
GPU Variant
GK107-320-A2
RDNA 3.0
Architecture
Kepler
TSMC
Foundry
TSMC
5 nm
Process Size
28 nm
57.7 billion
Transistors
1.27 billion
529 mm²
Die Size
118 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_0)
4.6
OpenGL
4.6
2.2
OpenCL
3.0
1.3
Vulkan
1.1
-
CUDA
3.0
6.7
Shader Model
5.1