[citation][nom]jprahman[/nom]True. The supercomputer the Chinese recently build featured large numbers of GPUs. A major advantage of GPUs is the GFLOP/watt ratio they boast. Take for instance the GTX 580, it consumes about 250W and runs at 1500 GFLOPs for a ratio of 6.3 GFLOPs per watt. A Core i7-2600 OTOH uses 95W and runs at 110 GFLOPs for a ratio of 1.5 GFLOPs per watt.[/citation]
[citation][nom]Darkk[/nom]What I don't understand that CPU processing power in math is actually outdated thanks to the raw power of GPUs so would make sense to use those instead.[/citation]
jprahman, you do know that the 95W TDP is how much watts of heat a cpu and/or a gpu will release and not how much it consumes
Both the GTX 580 and the core i7's can consume more watts than there TDP's are. (not all the energy thats consumed by the hardware is lost as heat)
As for why there not doing a build of gpu's, you are right that gpu's are faster in flops but it's difficult to program for a gpu to run stuff and not all programs that need floating point calculations are that well suited for a gpu.
It also depends on energy usage and electical limitation as well. Yeah if a gpu can get stuff done faster, it could stop so it wouldn't use as much electricity..... Although how often do you here a super computer getting a break for completing a hard job? Rarely. So imagine all the cost of running that....
Now, there is one thing to re-look at of who making this supercomputer. It's IBM. So there going to be using something similar to the PS3 cell cpu they make or there servers powerXcell sever cpu that back in 2008 was already able to achive over 100 GFLOPS on eight SPEs.
Now whats different about the cpu's IBM has vs AMD/Intel? there cpu's are more like gpu's than cpu's but not fully gpu's. There like the hardware thats right in the middle of the 2. That at least according to the F@H programers that make and run the PS3 clients.
So what ever cpu be put in this, i going to have to guess that it will have higher than average cpu flops but lower than power usage than a GPU. This is if IBM makes a cpu with what the cell's have.