Home GPU Comparison AMD Radeon RX 6900 XTX vs AMD Radeon HD 6870 1600SP Edition

AMD Radeon RX 6900 XTX vs AMD Radeon HD 6870 1600SP Edition

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XTX and 1024MB VRAM Radeon HD 6870 1600SP Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6900 XTX 's Advantages
Boost Clock2435MHz
More VRAM (16GB vs 1024GB)
Larger VRAM bandwidth (576.0GB/s vs 134.4GB/s)
3520 additional rendering cores
AMD Radeon HD 6870 1600SP Edition 's Advantages
Lower TDP (175W vs 330W)

Score

Benchmark

FP32 (float)
Radeon RX 6900 XTX +816%
24.93 TFLOPS
Radeon HD 6870 1600SP Edition
2.72 TFLOPS
VS

Graphics Card

Unknown
Release Date
Jan 2013
Navi II
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

2075 MHz
Base Clock
-
2435 MHz
Boost Clock
-
2250 MHz
Memory Clock
1050 MHz

Memory

16GB
Memory Size
1024MB
GDDR6
Memory Type
GDDR5
256bit
Memory Bus
256bit
576.0GB/s
Bandwidth
134.4GB/s

Render Config

80
Compute Units
20
-
-
-
5120
Shading Units
1600
320
TMUs
80
128
ROPs
32
-
-
-
80
RT Cores
-
128 KB per Array
L1 Cache
8 KB (per CU)
4 MB
L2 Cache
512 KB
128 MB
L3 Cache
-

Theoretical Performance

311.7 GPixel/s
Pixel Rate
27.20 GPixel/s
779.2 GTexel/s
Texture Rate
68.00 GTexel/s
49.87 TFLOPS
FP16 (half)
-
24.93 TFLOPS
FP32 (float)
2.720 TFLOPS
1.558 TFLOPS
FP64 (double)
544.0 GFLOPS

Board Design

330W
TDP
175W
700 W
Suggested PSU
450 W
1x HDMI 2.1 2x DisplayPort 1.4a 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 21
GPU Name
Cypress
Navi 21 XTXH (215-121000247)
GPU Variant
Cypress XT (215-0735033)
RDNA 2.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
7 nm
Process Size
40 nm
26.8 billion
Transistors
2.154 billion
520 mm²
Die Size
334 mm²

Graphics Features

12 Ultimate (12_2)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
2.1
OpenCL
1.2
1.3
Vulkan
N/A
-
-
-
6.5
Shader Model
5.0

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