AMD Radeon R9 270 1024SP vs NVIDIA GeForce GTX 660 Rev. 2

Graphics Processor

GPU model Pitcairn GK104
GPU variant Pitcairn PRO (215-0828062)
Architecture GCN 1.0 Kepler
Foundry TSMC TSMC
Manufacturing process 28 nm 28 nm
Number of transistors 2,800 million 3,540 million
Die size 212 mm² 294 mm²

Graphics Card

Release date Mar 13th, 2015 Sep 13th, 2014
Generation Volcanic Islands GeForce 600
Production End-of-life End-of-life
Interface PCIe 3.0 x16 PCIe 3.0 x16
Reviews 32 in our database 77 in our database
Predecessor Sea Islands GeForce 500
Successor Pirate Islands GeForce 700

Clocks

Base clock 900 MHz 980 MHz
Boost clock 925 MHz 1032 MHz
Memory clock 1200 MHz 4.8 Gbps effective 1502 MHz 6 Gbps effective

Memory Configuration

Memory size 2 GB 2 GB
Memory type GDDR5 GDDR5
Memory bus width 256 bit 192 bit
Bandwidth 153.6 GB/s 144.2 GB/s

Render Configuration

Shading units 1024 960
TMUs 64 80
ROPs 32 24
Compute units 16
Cache L1 16 KB (per CU) 16 KB (per SMX)
Cache L2 512 KB 384 KB
SMX count 5

Performance

Pixel rate 29.60 GPixel/s 20.64 GPixel/s
Texture rate 59.20 GTexel/s 82.56 GTexel/s
FP32 (float) performance 1.894 TFLOPS 1.981 TFLOPS
FP64 (double) performance 118.4 GFLOPS (1:16) 82.56 GFLOPS (1:24)

Dimensions & Outputs

Slot width Dual-slot Dual-slot
TDP 150 W 140 W
Suggested PSU 450 W 300 W
Outputs 2x DVI1x HDMI1x DisplayPort 2x DVI1x HDMI1x DisplayPort
Power connectors 1x 6-pin 1x 6-pin
Board number C403 P2004 SKU 11
Length 241 mm 9.5 inches

API Support & Features

DirectX 12 (11_1) 12 (11_0)
OpenGL 4.6 4.6
OpenCL 1.2 3.0
Vulkan 1.2 1.1
Shader model 5.1 5.1
CUDA 3.0

Other Features

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