AMD Radeon HD 8970 OEM vs AMD Radeon HD 6990
GPU · Specs Compare
Graphics Card
Release Date
Jan 2013
Mar 2011
Generation
Sea Islands
Northern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 2.0 x16
Clock Speeds
Memory Clock
1375 MHz
1250 MHz
Memory
Memory Size
3GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
264.0GB/s
160.0GB/s
Render Config
Compute Units
32
24
Shading Units
2048
1536
TMUs
128
96
ROPs
32
32
L1 Cache
16 KB (per CU)
8 KB (per CU)
L2 Cache
768 KB
512 KB
Theoretical Performance
Pixel Rate
29.60 GPixel/s
26.56 GPixel/s
Texture Rate
118.4 GTexel/s
79.68 GTexel/s
FP32 (float)
3.789 TFLOPS
2.550 TFLOPS
FP64 (double)
947.2 GFLOPS
637.4 GFLOPS
Graphics Processor
GPU Name
Tahiti
Antilles
GPU Variant
Tahiti XT(215-0821060)
Antilles XT(215-0807027)
Architecture
GCN 1.0
TeraScale 3
Foundry
TSMC
TSMC
Process Size
28 nm
40 nm
Transistors
4.313 billion
2.64 billion
Die Size
352 mm²
389 mm²
Board Design
TDP
250W
375W
Suggested PSU
600 W
750 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
1x DVI4x mini-DisplayPort 1.2
Power Connectors
1x 6-pin + 1x 8-pin
2x 8-pin
Graphics Features
DirectX
12 (11_1)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
1.2
1.2
Vulkan
1.2
N/A
Shader Model
5.1
5.0
▲ Specs Compare
Data sourced from official specifications and benchmark tests.