# Speed Factor of GPU Variants

Boost for Daz features a curated range of GPU based on cost and speed.  The GPU speed is calculated using a metric called Iteration Rate, which is essentially the number of iterations the GPU can do per second.  

In the table below, you can find the Speed Factor (the multiple) of a particular variant compared to the base (single) GPU in that family.  For example, using the table below you'll see that the speed of a A6000x3 is 2.7 times faster than the speed of a single A6000. 

These calculations use the [RayDant Benchmark file](https://www.daz3d.com/forums/discussion/341041/daz-studio-iray-rendering-hardware-benchmarking/p1#Section%205.2) (available on Daz forums) and are taken at 1800 iterations and convergence set to 95%.

<table><thead><tr><th width="247">Boost for Daz GPU Variants</th><th width="136">Iteration Rate (itr/s)</th><th width="146">Speed Factor Multple</th><th width="327">Benchmark Render Duration (sec)</th></tr></thead><tbody><tr><td>NVIDIA RTX 4000</td><td>6.143</td><td>base</td><td>293</td></tr><tr><td>NVIDIA RTX 4000 x2</td><td>11.111</td><td>1.8</td><td>162</td></tr><tr><td>NVIDIA RTX 4000 x3</td><td>16.667</td><td>2.7</td><td>108</td></tr><tr><td>NVIDIA RTX 4000 x4</td><td>19.149</td><td>3.1</td><td>94</td></tr><tr><td>NVIDIA RTX 5000</td><td>6.792</td><td>base</td><td>265</td></tr><tr><td>NVIDIA RTX 5000 x2</td><td>12.081</td><td>1.8</td><td>149</td></tr><tr><td>NVIDIA RTX 5000 x3</td><td>17.308</td><td>2.5</td><td>104</td></tr><tr><td>NVIDIA RTX A4000</td><td>10.651</td><td>base</td><td>169</td></tr><tr><td>NVIDIA RTX A4000 x2</td><td>20.455</td><td>1.9</td><td>88</td></tr><tr><td>NVIDIA RTX A4000 x3</td><td>26.087</td><td>2.4</td><td>69</td></tr><tr><td>NVIDIA RTX A4000 x4</td><td>34.615</td><td>3.3</td><td>52</td></tr><tr><td>NVIDIA Tesla V100  x1</td><td>9.626</td><td>base</td><td>187</td></tr><tr><td>NVIDIA Tesla V100  x2</td><td>15.385</td><td>1.6</td><td>117</td></tr><tr><td>NVIDIA RTX A5000</td><td>15.929</td><td>base</td><td>113</td></tr><tr><td>NVIDIA RTX A5000 x2</td><td>32.143</td><td>2.0</td><td>56</td></tr><tr><td>NVIDIA RTX A5000 x3</td><td>38.298</td><td>2.4</td><td>47</td></tr><tr><td>NVIDIA RTX A5000 x4</td><td>48.649</td><td>3.1</td><td>37</td></tr><tr><td>NVIDIA RTX A6000</td><td>17.308</td><td>base</td><td>104</td></tr><tr><td>NVIDIA RTX A6000 x2</td><td>32.727</td><td>1.9</td><td>55</td></tr><tr><td>NVIDIA RTX A6000 x3</td><td>46.154</td><td>2.7</td><td>39</td></tr><tr><td>NVIDIA RTX A40 x1</td><td>15.254</td><td>base</td><td>118</td></tr><tr><td>NVIDIA RTX A40 x2</td><td>28.125</td><td>1.8</td><td>64</td></tr><tr><td>NVIDIA RTX A40 x3</td><td>40.000</td><td>2.6</td><td>45</td></tr><tr><td>NVIDIA RTX A40 x4</td><td>54.545</td><td>3.6</td><td>33</td></tr></tbody></table>