 The Fastra II 's predecessor , the Fastra I , has 4 dual @-@ GPU GeForce 9800 GX2 video cards , for a total of 8 GPUs . At that time , the ASTRA group needed a motherboard that had four PCI Express x16 slots with double @-@ spacing between each of them . The only such motherboard the ASTRA group could find at that time was the MSI K9A2 Platinum , which has four such slots . In 2009 , the Asus P6T7 WS Supercomputer motherboard , which the Fastra II uses , was released , which has seven PCI Express x16 slots . The Fastra II has six faster dual @-@ GPU GeForce GTX 295 video cards , and a single @-@ GPU GeForce GTX 275 , for a total of 13 GPUs . In the Fastra II , the GPUs mainly perform tomographic reconstruction . The technique which allows GPUs to perform general @-@ purpose tasks like this outside of gaming , instead of CPUs , is called GPGPU , general @-@ purpose computing on graphics processing units . 
 The Fastra II <a href='null_genetive' title='1'><mark>'s</mark></a>predecessor , the Fastra I , <a href='got' title='2'><mark>has</mark></a> 4 dual @-@ GPU GeForce 9800 GX2 video cards , for a total of 8 GPUs . At that time , the ASTRA group needed a motherboard <a href='null_relcl' title='3'><mark>that</mark></a>had four PCI Express x16 slots with double @-@ spacing between each of them . The only such motherboard the ASTRA group could find at that time was the MSI K9A2 Platinum , which <a href='got' title='4'><mark>has</mark></a> four such slots . In 2009 , the Asus P6T7 WS Supercomputer motherboard , which the Fastra II uses , was released , which <a href='got' title='5'><mark>has</mark></a> seven PCI Express x16 slots . The Fastra II <a href='got' title='6'><mark>has</mark></a> six faster dual @-@ GPU GeForce GTX 295 video cards , and a single @-@ GPU GeForce GTX 275 , for a total of 13 GPUs . In the Fastra II , the GPUs mainly perform tomographic reconstruction . The technique which <a href='uninflect' title='7'><mark>allows</mark></a> GPUs to perform general @-@ purpose tasks like this outside of gaming , instead of CPUs , is called GPGPU , general @-@ purpose computing on graphics processing units . 
The Fastra II  predecessor , the Fastra I , got 4 dual @-@ GPU GeForce 9800 GX2 video cards , fir a total of 8 GPUs . At that time , the ASTRA group needed a motherboard had four PCI Express x16 slots wid double @-@ spacing between each of them . The only such motherboard the ASTRA group could find at that time was the MSI K9A2 Platinum , which got 4 such slots . In 2009 , da Asus P6T7 WS Supercomputer motherboard , which the Fastra II uses , was released , which got seven PCI Express x16 slots . The Fastra II got six faster dual @-@ GPU GeForce GTX 295 video cards , and a single @-@ GPU GeForce GTX 275 , for a total of 13 GPUs . In the Fastra II , tdaGPUs mainly perform tomographic reconstruction . The technique which allow GPUs to perform general @-@ purpose tasks like dis outside of gaming , instead of CPUs , is called GPGPU , general @-@ purpose computing on graphics processing units .