Radeon RX 7900 XT vs Radeon HD 4870 Mac Edition
We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7900 XT and 512MB VRAM Radeon HD 4870 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 7900 XT 's Advantages
Released 13 years and 10 months late
Boost Clock2394MHz
More VRAM (20GB vs 512GB)
Larger VRAM bandwidth (800.0GB/s vs 108.8GB/s)
4576 additional rendering cores
Radeon HD 4870 Mac Edition 's Advantages
Lower TDP (150W vs 300W)
Score
Benchmark
FP32 (float)
Radeon RX 7900 XT
+4190%
51480
Radeon HD 4870 Mac Edition
1200
Graphics Card
Nov 2022
Release Date
Jan 2009
Navi III
Generation
Radeon R700
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
850 MHz
Memory
20GB
Memory Size
512MB
GDDR6
Memory Type
GDDR5
320bit
Memory Bus
256bit
800.0GB/s
Bandwidth
108.8GB/s
Render Config
84
Compute Units
10
5376
Shading Units
800
336
TMUs
40
192
ROPs
16
84
RT Cores
-
256 KB per Array
L1 Cache
16 KB (per CU)
6 MB
L2 Cache
256 KB
80 MB
L3 Cache
-
Theoretical Performance
459.6 GPixel/s
Pixel Rate
12.00 GPixel/s
804.4 GTexel/s
Texture Rate
30.00 GTexel/s
103.0 TFLOPS
FP16 (half)
-
51.48 TFLOPS
FP32 (float)
1200 GFLOPS
1.609 TFLOPS
FP64 (double)
240.0 GFLOPS
Board Design
300W
TDP
150W
700 W
Suggested PSU
450 W
1x HDMI 2.1a
2x DisplayPort 2.1
1x USB Type-C
Outputs
1x DVI
1x mini-DisplayPort 1.0
2x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
Navi 31
GPU Name
RV770
Navi 31 XT
(215-145000156)
GPU Variant
RV770 XT Mac
(215-0669080)
RDNA 3.0
Architecture
TeraScale
TSMC
Foundry
TSMC
5 nm
Process Size
55 nm
57.7 billion
Transistors
0.956 billion
529 mm²
Die Size
256 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3
2.2
OpenCL
1.1
1.3
Vulkan
N/A
6.7
Shader Model
4.1
