Home GPU Comparison AMD Radeon R9 285X vs AMD Radeon HD 6850 1440SP Edition

AMD Radeon R9 285X vs AMD Radeon HD 6850 1440SP Edition

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 285X and 1024MB VRAM Radeon HD 6850 1440SP Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 285X 's Advantages
More VRAM (3GB vs 1024GB)
Larger VRAM bandwidth (264.0GB/s vs 128.0GB/s)
608 additional rendering cores
AMD Radeon HD 6850 1440SP Edition 's Advantages
Lower TDP (151W vs 200W)

Score

Benchmark

FP32 (float)
Radeon R9 285X +96%
4.104 TFLOPS
Radeon HD 6850 1440SP Edition
2.088 TFLOPS
VS

Graphics Card

Unknown
Release Date
Aug 2012
Volcanic Islands
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

-
-
-
-
-
-
1375 MHz
Memory Clock
1000 MHz

Memory

3GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
256bit
264.0GB/s
Bandwidth
128.0GB/s

Render Config

32
Compute Units
18
-
-
-
2048
Shading Units
1440
128
TMUs
72
32
ROPs
32
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
768 KB
L2 Cache
512 KB
-
-
-

Theoretical Performance

32.06 GPixel/s
Pixel Rate
23.20 GPixel/s
128.3 GTexel/s
Texture Rate
52.20 GTexel/s
-
-
-
4.104 TFLOPS
FP32 (float)
2.088 TFLOPS
-
FP64 (double)
417.6 GFLOPS

Board Design

200W
TDP
151W
550 W
Suggested PSU
450 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x HDMI 1.3a 1x DisplayPort 1.1
1x 6-pin + 1x 8-pin
Power Connectors
2x 6-pin

Graphics Processor

Tonga
GPU Name
Cypress
Tonga XT (215-0851313)
GPU Variant
Cypress PRO (215-0735043)
GCN 3.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
5 billion
Transistors
2.154 billion
366 mm²
Die Size
334 mm²

Graphics Features

12 (12_0)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
2.0
OpenCL
1.2
1.2
Vulkan
N/A
-
-
-
6.3
Shader Model
5.0

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