NVIDIA GeForce 845M 4SM vs NVIDIA GeForce GTX 870M Full Specs
512 Shaders 863MHz | 1,344 Shaders 941MHz |
2GB DDR316GB/s | 3GB GDDR5120GB/s |
·· 883.7 GFLOPS | ·· 2.53 TFLOPS |
Form Factor Soldered | Form Factor Soldered |
TDP 45W | TDP 110W |
GeForce 845M 4SM883.7 GFLOPSFP32
GeForce GTX 870M2.53 TFLOPSFP32Clock Speed ·· | Clock Speed ·· |
Peak OPS 883.7 GFLOPSFP32 | Peak OPS 2.53 TFLOPSFP32 |
FP32 883.7 GFLOPS | FP32 2.53 TFLOPS |
FP64 27.62 GFLOPS | FP64 105.4 GFLOPS |
Pixel Rate 13.8 GPixel/s | Pixel Rate 22.6 GPixel/s |
Texture Rate 27.6 GTexel/s | Texture Rate 105.4 GTexel/s |
Shaders 512 Shaders | Shaders 1,344 Shaders |
TMUs 32 TMUs | TMUs 112 TMUs |
ROPs 16 ROPs | ROPs 24 ROPs |
SMs 4 SMs | SMs 7 SMs |
Boost Clock 863MHz | Boost Clock 941MHz |
L2 Cache 2MB shared | L2 Cache 512KB shared |
2GB DDR3 | 3GB GDDR5 |
Memory Bus 64-bit | Memory Bus 192-bit |
Memory Speed 2GT/s | Memory Speed 5GT/s |
Memory Bandwidth 16GB/s | Memory Bandwidth 120GB/s |
ECC No | ECC No |
TDP 45W | TDP 110W |
Multi-Monitor 2 | Multi-Monitor 3 |
Encoder Model NVENC 2 | Encoder Model NVENC 1 |
Decoder Model NVDEC 1 | Decoder Model NVDEC 1 |
Form Factor Soldered | Form Factor Soldered |
Manufacturer | Manufacturer |
Chip Designer | Chip Designer |
Architecture | Architecture |
Family | Family |
Branding  | Branding  |
Codename NV117 | Codename NVE4 |
Chip Variant GM107-220-A2 | Chip Variant GK104-200-KD-A2 |
Market Segment Laptop | Market Segment Laptop |
Release Date Aug 16, 2015 | Release Date Mar 12, 2014 |
Foundry TSMC | Foundry TSMC |
Fabrication Node 28nm | Fabrication Node 28nm |
Die Size 148mm² | Die Size 294mm² |
Transistor Count 1.9 Billion | Transistor Count 3.5 Billion |
Transistor Density 12.64 MTr/mm² | Transistor Density 12.04 MTr/mm² |
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Laptops - | Laptops |