AMD Radeon HD 6990M vs AMD Radeon HD 7850
GPU · Specs Compare
Graphics Card
Release Date
Jul 2011
Mar 2012
Generation
Vancouver
Southern Islands
Type
Mobile
Desktop
Bus Interface
MXM-B (3.0)
PCIe 3.0 x16
Clock Speeds
Memory Clock
900 MHz
1200 MHz
Memory
Memory Size
2GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
115.2GB/s
153.6GB/s
Render Config
Compute Units
14
16
Shading Units
1120
1024
TMUs
56
64
ROPs
32
32
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
22.88 GPixel/s
27.52 GPixel/s
Texture Rate
40.04 GTexel/s
55.04 GTexel/s
FP32 (float)
1.602 TFLOPS
1.761 TFLOPS
FP64 (double)
—
110.1 GFLOPS
Graphics Processor
GPU Name
Blackcomb
Pitcairn
GPU Variant
Blackcomb XTX(216-0811030)
Pitcairn PRO(215-0828062)
Architecture
TeraScale 2
GCN 1.0
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
1.7 billion
2.8 billion
Die Size
212 mm²
212 mm²
Board Design
TDP
100W
130W
Outputs
No outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
None
1x 6-pin
Suggested PSU
—
300 W
Graphics Features
DirectX
11.2 (11_0)
12 (11_1)
OpenGL
4.4
4.6
OpenCL
1.2
1.2
Vulkan
N/A
1.2
Shader Model
5.0
5.1
Benchmark
3DMark Time Spy
—
1,334
3DMark Time Spy Extreme
—
325
▲ Specs Compare
Data sourced from official specifications and benchmark tests.