Home GPU Comparison ATI Radeon HD 4770 vs NVIDIA GeForce GT 640 Rev. 2

ATI Radeon HD 4770 vs NVIDIA GeForce GT 640 Rev. 2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4770 and 1024MB VRAM GeForce GT 640 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4770 's Advantages
Larger VRAM bandwidth (51.20GB/s vs 40.06GB/s)
256 additional rendering cores
NVIDIA GeForce GT 640 Rev. 2 's Advantages
Released 4 years and 1 months late
More VRAM (1024GB vs 512GB)
Lower TDP (49W vs 80W)

Score

Benchmark

FP32 (float)
Radeon HD 4770 +19%
0.96 TFLOPS
GeForce GT 640 Rev. 2
0.803 TFLOPS
VS

Graphics Card

Apr 2009
Release Date
May 2013
Radeon R700
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x8

Clock Speeds

-
-
-
-
-
-
800 MHz
Memory Clock
1252 MHz

Memory

512MB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
128bit
Memory Bus
64bit
51.20GB/s
Bandwidth
40.06GB/s

Render Config

8
Compute Units
-
-
-
-
640
Shading Units
384
32
TMUs
32
16
ROPs
8
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per SMX)
128 KB
L2 Cache
512 KB
-
-
-

Theoretical Performance

12.00 GPixel/s
Pixel Rate
8.368 GPixel/s
24.00 GTexel/s
Texture Rate
33.47 GTexel/s
-
-
-
960.0 GFLOPS
FP32 (float)
803.3 GFLOPS
192.0 GFLOPS
FP64 (double)
33.47 GFLOPS

Board Design

80W
TDP
49W
250 W
Suggested PSU
200 W
2x DVI 1x S-Video
Outputs
1x DVI 1x HDMI 1.4a 1x VGA
1x 6-pin
Power Connectors
None

Graphics Processor

RV740
GPU Name
GK208
RV740 XT (215-0727019)
GPU Variant
GK208-400-A1
TeraScale
Architecture
Kepler 2.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
0.826 billion
Transistors
1.02 billion
137 mm²
Die Size
87 mm²

Graphics Features

10.1 (10_1)
DirectX
12 (11_0)
3.3
OpenGL
4.6
1.1
OpenCL
3.0
N/A
Vulkan
1.1
-
CUDA
3.5
4.1
Shader Model
5.1

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