Originally Posted by CorsairBrandon
These Titan's suck! What a waste of money. Selling them both ASAP.
Do what you want to do, but the bottleneck is your CPU, not the GPUs.
Starting with 2 Titans, the CPU can't feed the GPUs fast enough. Check the power consumption of your Titans, they aren't running fully loaded with this benchmark.
They might upgrade the benchmark to get around the current 2 thread bottleneck. Until then, you are only checking the CPU speed not your graphic cards.
I have 4 Titans in one system and there the software problem of the benchmark is even bigger. I don't mind, as the workload I do is unrelated to some benchmark scores.
It is the same with 3dMark as well. If you don't have a highly overclocked CPU, the GPUs will never score well. Too bad, that these benchmark codes don't leverage all the cores on a CPU, so upgrading to 6 or 8 core CPU doesn't help for now.
With 4 Titans the score is directly proportional the the clock speed of the CPU.
BTW, most I/O benchmarks start to show wrong results as well when you test a very fast I/O system (i.e. 8, 16 or more SSDs connected) - they are up 90% off the speed you can get with appropriate software.
To cut a long story short - don't rely on benchmarks for justifying a purchase (unless you really know whats going on under the hood).