AMD Radeon HD 6990M vs NVIDIA GeForce GTX 680 Mac Edition
GPU Specs Compare
Graphics Card
Release Date
Jul 2011
Apr 2013
Generation
Vancouver
GeForce 600
Type
Mobile
Desktop
Bus Interface
MXM-B (3.0)
PCIe 2.0 x16
Clock Speeds
Memory Clock
900 MHz
1502 MHz
Base Clock
-
1006 MHz
Boost Clock
-
1058 MHz
Memory
Memory Size
2GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
115.2GB/s
192.3GB/s
Render Config
Compute Units
14
-
Shading Units
1120
1536
TMUs
56
128
ROPs
32
32
L1 Cache
8 KB (per CU)
16 KB (per SMX)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
22.88 GPixel/s
33.86 GPixel/s
Texture Rate
40.04 GTexel/s
135.4 GTexel/s
FP32 (float)
1.602 TFLOPS
3.250 TFLOPS
FP64 (double)
-
135.4 GFLOPS
Graphics Processor
GPU Name
Blackcomb
GK104
GPU Variant
Blackcomb XTX(216-0811030)
GK104-400-A2
Architecture
TeraScale 2
Kepler
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
1.7 billion
3.54 billion
Die Size
212 mm²
294 mm²
Board Design
TDP
100W
195W
Outputs
No outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
None
2x 6-pin
Suggested PSU
-
450 W
Graphics Features
DirectX
11.2 (11_0)
12 (11_0)
OpenGL
4.4
4.6
OpenCL
1.2
3.0
Vulkan
N/A
1.1
Shader Model
5.0
5.1
CUDA
-
3.0