Home GPU Comparison ATI Radeon HD 4770 vs AMD Radeon HD 7950

ATI Radeon HD 4770 vs AMD Radeon HD 7950

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4770 and 3GB VRAM Radeon HD 7950 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4770 's Advantages
Lower TDP (80W vs 200W)
AMD Radeon HD 7950 's Advantages
Released 2 years and 9 months late
More VRAM (3GB vs 512GB)
Larger VRAM bandwidth (240.0GB/s vs 51.20GB/s)
1152 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon HD 4770
0.96 TFLOPS
Radeon HD 7950 +198%
2.867 TFLOPS
VS

Graphics Card

Apr 2009
Release Date
Jan 2012
Radeon R700
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
-
-
-
-
-
800 MHz
Memory Clock
1250 MHz

Memory

512MB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
128bit
Memory Bus
384bit
51.20GB/s
Bandwidth
240.0GB/s

Render Config

8
Compute Units
28
-
-
-
640
Shading Units
1792
32
TMUs
112
16
ROPs
32
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
128 KB
L2 Cache
768 KB
-
-
-

Theoretical Performance

12.00 GPixel/s
Pixel Rate
25.60 GPixel/s
24.00 GTexel/s
Texture Rate
89.60 GTexel/s
-
-
-
960.0 GFLOPS
FP32 (float)
2.867 TFLOPS
192.0 GFLOPS
FP64 (double)
716.8 GFLOPS

Board Design

80W
TDP
200W
250 W
Suggested PSU
550 W
2x DVI 1x S-Video
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
1x 6-pin
Power Connectors
2x 6-pin

Graphics Processor

RV740
GPU Name
Tahiti
RV740 XT (215-0727019)
GPU Variant
Tahiti PRO (215-0821056)
TeraScale
Architecture
GCN 1.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
0.826 billion
Transistors
4.313 billion
137 mm²
Die Size
352 mm²

Graphics Features

10.1 (10_1)
DirectX
12 (11_1)
3.3
OpenGL
4.6
1.1
OpenCL
1.2
N/A
Vulkan
1.2
-
-
-
4.1
Shader Model
5.1

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