GPU Comparison
RADEON
AMD Radeon HD 6850 X2
CORE STATE
Barts
VRAM
2 GB
CLOCK SPEED
—
TDP
254 W
BUS WIDTH
256 bit
ARCHITECTURE
TeraScale 2
PROCESS
40 nm
LAUNCH DATE
2011
VS
GEFORCE
GeForce GTX 980 Ti
CORE STATE
GM200
VRAM
6 GB
CLOCK SPEED
1076 MHz
TDP
250 W
BUS WIDTH
384 bit
ARCHITECTURE
Maxwell 2.0
PROCESS
28 nm
LAUNCH DATE
2015
PERFORMANCE BENCHMARKS
geekbench_opencl
3dmark_3dmark_steel_nomad_dx12
geekbench_metal
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
GTX 980 Ti
Core Specs
Shading Units
960
2,816
+193.3%
Shaders
960
2,816
+193.3%
TMUs
48
176
+266.7%
ROPs
32
96
+200.0%
Compute Units
12
—
Clocks
Base Clock
—
1000 MHz
Boost Clock
—
1076 MHz
GPU Clock
800 MHz
—
Memory Clock
1050 MHz
4.2 Gbps effective
1753 MHz
7 Gbps effective
Memory
Memory Size
2 GB
6 GB
VRAM (MB)
2,048
6,144
+200.0%
Memory Type
GDDR5
GDDR5
Memory Bus
256 bit
384 bit
Bandwidth
134.4 GB/s
336.6 GB/s
Cache
L1 Cache
8 KB (per CU)
48 KB (per SMM)
L2 Cache
512 KB
3 MB
Performance
Pixel Rate
25.60 GPixel/s
103.3 GPixel/s
Texture Rate
38.40 GTexel/s
189.4 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
6.060 TFLOPS
FP64 (TFLOPS)
—
189.4 GFLOPS (1:32)
Power
TDP
254 W
250 W
TDP (W)
254
250
-1.6%
Suggested PSU
600 W
600 W
Power Connectors
2x 8-pin
1x 6-pin + 1x 8-pin
Architecture
Architecture
TeraScale 2
Maxwell 2.0
GPU Name
Barts
GM200
Generation
Northern Islands
(HD 6800)
GeForce 900
Process Size
40 nm
28 nm
Transistors
1,700 million
8,000 million
Die Size
255 mm²
601 mm²
Foundry
TSMC
TSMC
Density
6.7M / mm²
13.3M / mm²
API Support
DirectX
11.2 (11_0)
12 (12_1)
OpenGL
4.4
4.6
Vulkan
—
1.4
OpenCL
1.2
3.0
CUDA
—
5.2
Shader Model
5.0
6.8
Physical
Slot Width
Dual-slot
Dual-slot
Length
—
267 mm
10.5 inches
Height
—
111 mm
4.4 inches
Outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
1x DVI1x HDMI 2.03x DisplayPort 1.2
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Other
Launch Price
—
649 USD
Production
End-of-life
End-of-life
Predecessor
Evergreen
GeForce 700
Successor
Southern Islands
GeForce 10