Radeon HD 6990 vs Radeon HD 6930
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 1024MB VRAM Radeon HD 6930 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon HD 6990 's Advantages
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (160.0GB/s vs 153.6GB/s)
256 additional rendering cores
Radeon HD 6930 's Advantages
Released 9 months late
Lower TDP (186W vs 375W)
Score
Benchmark
FP32 (float)
Radeon HD 6990
+32%
2550
Radeon HD 6930
1920
Graphics Card
Mar 2011
Release Date
Dec 2011
Northern Islands
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
1250 MHz
Memory Clock
1200 MHz
Memory
2GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
160.0GB/s
Bandwidth
153.6GB/s
Render Config
24
Compute Units
20
1536
Shading Units
1280
96
TMUs
80
32
ROPs
32
8 KB (per CU)
L1 Cache
8 KB (per CU)
512 KB
L2 Cache
512 KB
Theoretical Performance
26.56 GPixel/s
Pixel Rate
24.00 GPixel/s
79.68 GTexel/s
Texture Rate
60.00 GTexel/s
2.550 TFLOPS
FP32 (float)
1.920 TFLOPS
637.4 GFLOPS
FP64 (double)
480.0 GFLOPS
Board Design
375W
TDP
186W
750 W
Suggested PSU
450 W
1x DVI
4x mini-DisplayPort 1.2
Outputs
2x DVI
1x HDMI 1.4a
2x mini-DisplayPort 1.2
2x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
Antilles
GPU Name
Cayman
Antilles XT
(215-0807027)
GPU Variant
Cayman CE
(215-0807105)
TeraScale 3
Architecture
TeraScale 3
TSMC
Foundry
TSMC
40 nm
Process Size
40 nm
2.64 billion
Transistors
2.64 billion
389 mm²
Die Size
389 mm²
Graphics Features
11.2 (11_0)
DirectX
11.2 (11_0)
4.4
OpenGL
4.4
1.2
OpenCL
1.2
N/A
Vulkan
N/A
5.0
Shader Model
5.0
