Radeon HD 6990 vs GeForce GTX 780 Ti Engineering Sample
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 3GB VRAM GeForce GTX 780 Ti Engineering Sample to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce GTX 780 Ti Engineering Sample 's Advantages
Boost Clock928MHz
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (336.6GB/s vs 160.0GB/s)
1344 additional rendering cores
Lower TDP (250W vs 375W)
Score
Benchmark
FP32 (float)
Radeon HD 6990
2550
GeForce GTX 780 Ti Engineering Sample
+109%
5345
Graphics Card
Mar 2011
Release Date
Unknown
Northern Islands
Generation
GeForce 700
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
875 MHz
-
Boost Clock
928 MHz
1250 MHz
Memory Clock
1753 MHz
Memory
2GB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
384bit
160.0GB/s
Bandwidth
336.6GB/s
Render Config
24
Compute Units
-
1536
Shading Units
2880
96
TMUs
240
32
ROPs
48
8 KB (per CU)
L1 Cache
16 KB (per SMX)
512 KB
L2 Cache
1536 KB
Theoretical Performance
26.56 GPixel/s
Pixel Rate
55.68 GPixel/s
79.68 GTexel/s
Texture Rate
222.7 GTexel/s
2.550 TFLOPS
FP32 (float)
5.345 TFLOPS
637.4 GFLOPS
FP64 (double)
222.7 GFLOPS
Board Design
375W
TDP
250W
750 W
Suggested PSU
600 W
1x DVI
4x mini-DisplayPort 1.2
Outputs
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
2x 8-pin
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Processor
Antilles
GPU Name
GK180
Antilles XT
(215-0807027)
GPU Variant
GK180-425-A1
TeraScale 3
Architecture
Kepler
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
2.64 billion
Transistors
7.08 billion
389 mm²
Die Size
561 mm²
Graphics Features
11.2 (11_0)
DirectX
12 (11_0)
4.4
OpenGL
4.6
1.2
OpenCL
3.0
N/A
Vulkan
1.2.175
-
CUDA
3.5
5.0
Shader Model
5.1