The new Opteron 6300: Finally Tested!

Conclusions

For those that prioritize performance/watt or performance/dollar and for the CPU enthusiasts, we've summarized our findings in a comparison table. We made four columns for easy comparison:

• In the first column, we compare the fastest Opteron with Intel's best offering. The closer the AMD Opteron can get to the E5-2660, the more price advantage can compensate for the higher power usage of the Opteron.
• In the second column, we compare the Opteron with the best performance per dollar ratio with a comparably priced Xeon.
• In the third column we measure how much progress AMD has made by replacing the Bulldozer core with the Piledriver core (higher IPC and clock).
• The fourth column gives you an idea of how much the small changes inside the Piledriver have improved the IPC.

We also group our benchmarks in different software groups and indicate the importance of this software group in the server market (we discussed this here). 100% means that both CPUs perform equally.

* estimate
** Rough estimate

After reviewing the Xeon-E5 we concluded:

"...it will be hard to recommend the current Opteron 6200. The Opteron 6200 might still have a chance as a low end virtualization server. After all, quite a few virtualization servers are bottlenecked by memory capacity and not by raw processing power. The Opteron can then leverage the fact that it can offer the same memory capacity at a lower price point. The Opteron might also have a role in the low end, price sensitive HPC market, where it still performs very well. Whether you want high performance per dollar or performance per watt, the Xeon E5-2660 is simply a home run. End of story."

To sum it up, the Xeon E5 was the best choice for most applications, as the Opteron 6200 could only leverage its price advantage in the low end virtualization and HPC market. But the lower acquisition costs were easily negated by the higher power draw and the fact that in most IT projects a few hundred dollars per server does not matter.

The new Opteron 6376 offers 5% to 11% better performance per clock, 8% lower energy consumption, 6% lower peak power draw, and an 11% lower price than the Opteron 6276. That's all good, but there is more. Keeping the G34 platform alive has a very positive effect on the OEM pricing: the Opteron servers are tangibly cheaper. The price difference is quite a bit higher than the CPU list prices suggest. You can get a 6380 based server for the price of a Xeon E5-2640 based server.

All these small steps forward make the AMD Opteron attractive again for the price conscious buyers looking for a virtualization host or an HPC crunching machine. The Opteron machines need more energy to do their job, but once again you get better performance per dollar than Intel's midrange offerings.

However, if your consulting or software costs are a lot higher than the hardware costs, the octal core Xeons offer an excellent performance/watt ratio and are by far the best performers too. In a nutshell, Intel's octal core Xeons are still unmatched, but AMD is putting some pressure on Intel's hex-core midrange offerings, and that is always good news for the customers.