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GPU Comparison
AMD Radeon R9 285 vs ATI Radeon HD 4855
AMD Radeon R9 285 vs ATI Radeon HD 4855
VS
AMD Radeon R9 285
ATI Radeon HD 4855
We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 285 and 512MB VRAM Radeon HD 4855 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 285 's Advantages
Released 4 years and 8 months late
Larger VRAM bandwidth (176.0GB/s vs 115.2GB/s)
1152 additional rendering cores
ATI Radeon HD 4855 's Advantages
Lower TDP (110W vs 190W)
Score
Benchmark
FP32 (float)
Radeon R9 285
+347%
3.29 TFLOPS
Radeon HD 4855
0.736 TFLOPS
Radeon R9 285
VS
Radeon HD 4855
Graphics Card
Sep 2014
Release Date
Jan 2010
Volcanic Islands
Generation
Radeon R700
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1375 MHz
Memory Clock
900 MHz
Memory
2GB
Memory Size
512MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
176.0GB/s
Bandwidth
115.2GB/s
Render Config
-
SM Count
-
28
Compute Units
8
1792
Shading Units
640
112
TMUs
32
32
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
256 KB
Theoretical Performance
29.38 GPixel/s
Pixel Rate
9.200 GPixel/s
102.8 GTexel/s
Texture Rate
18.40 GTexel/s
3.290 TFLOPS
FP16 (half)
-
3.290 TFLOPS
FP32 (float)
736.0 GFLOPS
205.6 GFLOPS
FP64 (double)
147.2 GFLOPS
Graphics Processor
Tonga
GPU Name
RV770
Tonga PRO (215-0851128)
GPU Variant
RV770 PRO (215-0669065)
GCN 3.0
Architecture
TeraScale
TSMC
Foundry
TSMC
28 nm
Process Size
55 nm
5 billion
Transistors
0.956 billion
366 mm²
Die Size
256 mm²
Board Design
190W
TDP
110W
450 W
Suggested PSU
300 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.3a 1x VGA
2x 6-pin
Power Connectors
1x 6-pin
Graphics Features
12 (12_0)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3
2.1
OpenCL
1.1
1.2.170
Vulkan
N/A
-
CUDA
-
6.5
Shader Model
4.1
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