AMD Stream Processor vs NVIDIA GeForce 945A

Table of Contents

Graphics Processor

GPU model R580 GM108
GPU variant R580 XTX —
Architecture R500 Maxwell
Foundry TSMC TSMC
Manufacturing process 90 nm 28 nm
Number of transistors 384 million unknown
Die size 352 mm² unknown

Graphics Card

Release date 2006 —
Generation FireStream —
Production End-of-life —
Interface PCIe 1.0 x16 —

Clocks

GPU clock 594 MHz —
Memory clock 648 MHz 1296 Mbps effective 1253 MHz 5 Gbps effective
Base clock — 1006 MHz
Boost clock — 1189 MHz

Memory Configuration

Memory size 1024 MB 1024 MB
Memory type GDDR3 GDDR5
Memory bus width 256 bit 64 bit
Bandwidth 41.47 GB/s 40.10 GB/s

Render Configuration

Pixel shaders 48 —
Vertex shaders 8 —
TMUs 16 24
ROPs 16 8
Shading units — 384
SMM count — 3
Cache L1 — 64 KB (per SMM)
Cache L2 — 1024 KB

Performance

Pixel rate 9.504 GPixel/s 9.512 GPixel/s
Vertex rate 1.188 GVertices/s —
Texture rate 9.504 GTexel/s 28.54 GTexel/s
FP32 (float) performance — 913.2 GFLOPS
FP64 (double) performance — 28.54 GFLOPS (1:32)

Dimensions & Outputs

Slot width Dual-slot MXM Module
Length 241 mm 9.5 inches —
Width 111 mm 4.4 inches —
TDP 165 W 33 W
Suggested PSU 450 W —
Outputs 2x DVI1x S-Video No outputs
Power connectors 1x 6-pin —

API Support & Features

DirectX 9.0c (9_3) 12 (11_0)
OpenGL 2.1 (full) 3.0 (partial) 4.6
OpenCL — 3.0
Vulkan — 1.1
Shader model 3.0 5.1
CUDA — 5.0

Other Features

Mobile graphics

Release date — Mar 13th, 2015
Generation — GeForce 900A
Production — End-of-life
Interface — PCIe 3.0 x8
Predecessor — GeForce 800A

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