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GPU Comparison
NVIDIA GeForce GT 640 vs AMD Radeon HD 8770 OEM
NVIDIA GeForce GT 640 vs AMD Radeon HD 8770 OEM
VS
NVIDIA GeForce GT 640
AMD Radeon HD 8770 OEM
We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 1024MB VRAM Radeon HD 8770 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GT 640 's Advantages
More VRAM (2GB vs 1024GB)
Lower TDP (65W vs 85W)
AMD Radeon HD 8770 OEM 's Advantages
Released 1 years and 3 months late
Larger VRAM bandwidth (96.00GB/s vs 28.51GB/s)
512 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GT 640
0.693 TFLOPS
Radeon HD 8770 OEM
+171%
1.882 TFLOPS
GeForce GT 640
VS
Radeon HD 8770 OEM
Graphics Card
Jun 2012
Release Date
Sep 2013
GeForce 600
Generation
Sea Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
-
-
-
-
-
891 MHz
Memory Clock
1500 MHz
Memory
2GB
Memory Size
1024MB
DDR3
Memory Type
GDDR5
128bit
Memory Bus
128bit
28.51GB/s
Bandwidth
96.00GB/s
Render Config
-
Compute Units
14
-
-
-
384
Shading Units
896
32
TMUs
56
16
ROPs
16
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
256 KB
-
-
-
Theoretical Performance
7.216 GPixel/s
Pixel Rate
16.80 GPixel/s
28.86 GTexel/s
Texture Rate
58.80 GTexel/s
-
-
-
692.7 GFLOPS
FP32 (float)
1.882 TFLOPS
28.86 GFLOPS
FP64 (double)
117.6 GFLOPS
Board Design
65W
TDP
85W
250 W
Suggested PSU
250 W
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
None
Power Connectors
1x 6-pin
Graphics Processor
GK107
GPU Name
Bonaire
GK107-300-A2
GPU Variant
Bonaire XT (215-0839039)
Kepler
Architecture
GCN 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.27 billion
Transistors
2.08 billion
118 mm²
Die Size
160 mm²
Graphics Features
12 (11_0)
DirectX
12 (12_0)
4.6
OpenGL
4.6
3.0
OpenCL
2.0
1.1
Vulkan
1.2
3.0
CUDA
-
5.1
Shader Model
6.3
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