Radeon RX 7900 XT vs Radeon HD 6870
We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7900 XT and 1024MB VRAM Radeon HD 6870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 7900 XT 's Advantages
Released 12 years and 1 months late
Boost Clock2394MHz
More VRAM (20GB vs 1024GB)
Larger VRAM bandwidth (800.0GB/s vs 134.4GB/s)
4256 additional rendering cores
Radeon HD 6870 's Advantages
Lower TDP (151W vs 300W)
Score
Benchmark
FP32 (float)
Radeon RX 7900 XT
+2453%
51480
Radeon HD 6870
2016
Graphics Card
Nov 2022
Release Date
Oct 2010
Navi III
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
1387 MHz
Base Clock
-
2394 MHz
Boost Clock
-
2500 MHz
Memory Clock
1050 MHz
Memory
20GB
Memory Size
1024MB
GDDR6
Memory Type
GDDR5
320bit
Memory Bus
256bit
800.0GB/s
Bandwidth
134.4GB/s
Render Config
84
Compute Units
14
5376
Shading Units
1120
336
TMUs
56
192
ROPs
32
84
RT Cores
-
256 KB per Array
L1 Cache
8 KB (per CU)
6 MB
L2 Cache
512 KB
80 MB
L3 Cache
-
Theoretical Performance
459.6 GPixel/s
Pixel Rate
28.80 GPixel/s
804.4 GTexel/s
Texture Rate
50.40 GTexel/s
103.0 TFLOPS
FP16 (half)
-
51.48 TFLOPS
FP32 (float)
2.016 TFLOPS
1.609 TFLOPS
FP64 (double)
-
Board Design
300W
TDP
151W
700 W
Suggested PSU
450 W
1x HDMI 2.1a
2x DisplayPort 2.1
1x USB Type-C
Outputs
2x DVI
1x HDMI 1.3a
2x mini-DisplayPort 1.1
2x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
Navi 31
GPU Name
Barts
Navi 31 XT
(215-145000156)
GPU Variant
Barts XT
(215-0798000)
RDNA 3.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
5 nm
Process Size
40 nm
57.7 billion
Transistors
1.7 billion
529 mm²
Die Size
255 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
2.2
OpenCL
1.2
1.3
Vulkan
N/A
6.7
Shader Model
5.0
