Radeon HD 6990 vs Radeon R9 280
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 3GB VRAM Radeon R9 280 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon R9 280 's Advantages
Released 3 years late
Boost Clock933MHz
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (240.0GB/s vs 160.0GB/s)
256 additional rendering cores
Lower TDP (200W vs 375W)
Score
Benchmark
FP32 (float)
Radeon HD 6990
2550
Radeon R9 280
+31%
3344
Graphics Card
Mar 2011
Release Date
Mar 2014
Northern Islands
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
827 MHz
-
Boost Clock
933 MHz
1250 MHz
Memory Clock
1250 MHz
Memory
2GB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
384bit
160.0GB/s
Bandwidth
240.0GB/s
Render Config
24
Compute Units
28
1536
Shading Units
1792
96
TMUs
112
32
ROPs
32
8 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
768 KB
Theoretical Performance
26.56 GPixel/s
Pixel Rate
29.86 GPixel/s
79.68 GTexel/s
Texture Rate
104.5 GTexel/s
2.550 TFLOPS
FP32 (float)
3.344 TFLOPS
637.4 GFLOPS
FP64 (double)
836.0 GFLOPS
Board Design
375W
TDP
200W
750 W
Suggested PSU
550 W
1x DVI
4x mini-DisplayPort 1.2
Outputs
1x DVI
2x HDMI 1.4a
1x DisplayPort 1.2
2x 8-pin
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Processor
Antilles
GPU Name
Tahiti
Antilles XT
(215-0807027)
GPU Variant
Tahiti PRO3
(215-0821330)
TeraScale 3
Architecture
GCN 1.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
2.64 billion
Transistors
4.313 billion
389 mm²
Die Size
352 mm²
Graphics Features
11.2 (11_0)
DirectX
12 (11_1)
4.4
OpenGL
4.6
1.2
OpenCL
1.2
N/A
Vulkan
1.2
5.0
Shader Model
5.1
