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GPU Comparison
NVIDIA GeForce GT 640 vs AMD Radeon HD 8990 OEM
NVIDIA GeForce GT 640 vs AMD Radeon HD 8990 OEM
VS
NVIDIA GeForce GT 640
AMD Radeon HD 8990 OEM
We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 3GB VRAM Radeon HD 8990 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GT 640 's Advantages
Lower TDP (65W vs 375W)
AMD Radeon HD 8990 OEM 's Advantages
Released 10 months late
Boost Clock1000MHz
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (288.0GB/s vs 28.51GB/s)
1664 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GT 640
0.693 TFLOPS
Radeon HD 8990 OEM
+491%
4.096 TFLOPS
GeForce GT 640
VS
Radeon HD 8990 OEM
Graphics Card
Jun 2012
Release Date
Apr 2013
GeForce 600
Generation
Sea Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
950 MHz
-
Boost Clock
1000 MHz
891 MHz
Memory Clock
1500 MHz
Memory
2GB
Memory Size
3GB
DDR3
Memory Type
GDDR5
128bit
Memory Bus
384bit
28.51GB/s
Bandwidth
288.0GB/s
Render Config
-
Compute Units
32
-
-
-
384
Shading Units
2048
32
TMUs
128
16
ROPs
32
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
768 KB
-
-
-
Theoretical Performance
7.216 GPixel/s
Pixel Rate
32.00 GPixel/s
28.86 GTexel/s
Texture Rate
128.0 GTexel/s
-
-
-
692.7 GFLOPS
FP32 (float)
4.096 TFLOPS
28.86 GFLOPS
FP64 (double)
1024 GFLOPS
Board Design
65W
TDP
375W
250 W
Suggested PSU
750 W
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x DVI 4x mini-DisplayPort 1.2
None
Power Connectors
2x 8-pin
Graphics Processor
GK107
GPU Name
Malta
GK107-300-A2
GPU Variant
Malta XT (215-0849026)
Kepler
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.27 billion
Transistors
4.313 billion
118 mm²
Die Size
365 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
3.0
OpenCL
1.2
1.1
Vulkan
1.2
3.0
CUDA
-
5.1
Shader Model
5.1
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