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GPU Comparison
ATI Radeon HD 4870 vs AMD Radeon HD 7870 XT
ATI Radeon HD 4870 vs AMD Radeon HD 7870 XT
VS
ATI Radeon HD 4870
AMD Radeon HD 7870 XT
We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 and 2GB VRAM Radeon HD 7870 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
ATI Radeon HD 4870 's Advantages
Lower TDP (150W vs 185W)
AMD Radeon HD 7870 XT 's Advantages
Released 4 years and 5 months late
Boost Clock975MHz
Larger VRAM bandwidth (192.0GB/s vs 115.2GB/s)
736 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 4870
1.2 TFLOPS
Radeon HD 7870 XT
+149%
2.995 TFLOPS
Radeon HD 4870
VS
Radeon HD 7870 XT
Graphics Card
Jun 2008
Release Date
Nov 2012
Radeon R700
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
925 MHz
-
Boost Clock
975 MHz
900 MHz
Memory Clock
1500 MHz
Memory
512MB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
115.2GB/s
Bandwidth
192.0GB/s
Render Config
-
SM Count
-
10
Compute Units
24
800
Shading Units
1536
40
TMUs
96
16
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
512 KB
Theoretical Performance
12.00 GPixel/s
Pixel Rate
31.20 GPixel/s
30.00 GTexel/s
Texture Rate
93.60 GTexel/s
-
FP16 (half)
-
1200 GFLOPS
FP32 (float)
2.995 TFLOPS
240.0 GFLOPS
FP64 (double)
748.8 GFLOPS
Graphics Processor
RV770
GPU Name
Tahiti
RV770 XT (215-0669049)
GPU Variant
Tahiti LE (215-0821122)
TeraScale
Architecture
GCN 1.0
TSMC
Foundry
TSMC
55 nm
Process Size
28 nm
0.956 billion
Transistors
4.313 billion
256 mm²
Die Size
352 mm²
Board Design
150W
TDP
185W
450 W
Suggested PSU
450 W
2x DVI 1x S-Video
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
2x 6-pin
Power Connectors
2x 6-pin
Graphics Features
10.1 (10_1)
DirectX
12 (11_1)
3.3
OpenGL
4.6
1.1
OpenCL
1.2
N/A
Vulkan
1.2
-
CUDA
-
4.1
Shader Model
5.1
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