Radeon HD 3850 X3 vs Radeon HD 7950 Boost
We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3850 X3 and 3GB VRAM Radeon HD 7950 Boost to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon HD 3850 X3 Advantages
Lower TDP (145W vs 200W)
Radeon HD 7950 Boost Advantages
Boost Clock925MHz
More VRAM (3GB vs 512GB)
Larger VRAM bandwidth (240.0GB/s vs 54.40GB/s)
1472 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 3850 X3
428
Radeon HD 7950 Boost
+674%
3315
Graphics Card
Unknown
Release Date
Jun 2012
Radeon R600
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
850 MHz
-
Boost Clock
925 MHz
850 MHz
Memory Clock
1250 MHz
Memory
512MB
Memory Size
3GB
GDDR3
Memory Type
GDDR5
256bit
Memory Bus
384bit
54.40GB/s
Bandwidth
240.0GB/s
Render Config
4
Compute Units
28
320
Shading Units
1792
16
TMUs
112
16
ROPs
32
-
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
768 KB
Theoretical Performance
10.70 GPixel/s
Pixel Rate
29.60 GPixel/s
10.70 GTexel/s
Texture Rate
103.6 GTexel/s
428.2 GFLOPS
FP32 (float)
3.315 TFLOPS
-
FP64 (double)
828.8 GFLOPS
Board Design
145W
TDP
200W
300 W
Suggested PSU
550 W
4x DVI
Outputs
1x DVI
1x HDMI 1.4a
2x mini-DisplayPort 1.2
1x HDMI 1.4a
2x mini-DisplayPort 1.2
1x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
RV670
GPU Name
Tahiti
RV670 PRO
(215-0708003)
(215-0708003)
GPU Variant
Tahiti PRO2
(215-0821282)
(215-0821282)
TeraScale
Architecture
GCN 1.0
TSMC
Foundry
TSMC
55 nm
Process Size
28 nm
0.666 billion
Transistors
4.313 billion
192 mm²
Die Size
352 mm²
Graphics Features
10.1 (10_1)
DirectX
12 (11_1)
3.3 (full)
4.0 (partial)
4.0 (partial)
OpenGL
4.6
N/A
OpenCL
1.2
N/A
Vulkan
1.2
4.1
Shader Model
5.1
