The Opteron 6276: a closer lookby Johan De Gelas on February 9, 2012 6:00 AM EST
Since AMD sent us a 1U Supermicro server, we had to resort to testing with our 1U servers again. That is why we went back to the ASUS RS700 for the Xeon server.
Supermicro A+ server 1022G-URG (1U Chassis)
2x AMD Opteron Interlagos 6276 (2.3GHz, 8 cores per CPU, 16 integer clusters)
2x AMD Opteron Interlagos 6220 (3.0GHz, 4 cores per CPU, 8 integer clusters)
2x AMD Opteron Magny-Cours 6174 (2.2GHz, 12 cores per CPU)
|RAM||64GB (8x8GB) DDR3-1600 Samsung M393B1K70DH0-CK0|
|Chipset||AMD Chipset SR5670 + SP5100|
|BIOS version||v2.81 (10/28/2011)|
|PSU||SuperMicro PWS-704P-1R 750Watt|
The AMD CPUS have four memory channels per CPU. The new Interlagos Bulldozer CPU supports DDR3-1600 and thus our dual-CPU configuration uses eight DIMMs for maximum bandwidth and performance. We ran with one DIMM per channel.
Asus RS700-E6/RS4 1U Server
|CPU||2x Intel Xeon X5650 (2.66GHz, 6 cores/12 threads)|
|RAM||48GB (12x4GB) Kingston DDR3-1333 FB372D3D4P13C9ED1|
|BIOS version||1102 (08/25/2011)|
|PSU||770W Delta Electronics DPS-770AB|
To speed up testing, we ran the Intel Xeon and AMD Opteron system in parallel. As we didn't have more than eight 8GB DIMMs, we used our 4GB DDR3-1333 DIMMs for the Xeon server. The Xeon system only ends up with 48GB, but this is no disadvantage as our benchmark with the highest memory footprint (Nieuws.be/SQL Server 5 tiles) uses no more than 30GB of RAM.
We measured the difference between 12x4GB and 8x8GB of RAM and recalculated the power consumption for our power measurements (note that the differences were very small). There is no practical alternative as our Xeon has three memory channels and cannot be optimally configured with the same amount of RAM as our Opteron system (which has four channels).
We chose the Xeons based on AMD's positioning. The Xeon X5649 is priced at the same level as the Opteron 6276 but we didn't have the X5649 in the labs. As we suggested in our previous article, the Opteron 6276 should reach the performance of the X5650 to be attractive, so we tested with the X5650.
Common Storage System
Both servers used intel 710 SSDs for storing the database.
All Windows testing was done on Windows 2008 R2 SP1. The Linux tests are done on Ubuntu 11.10 Linux kernel 3.0.0-14 SMP x86_64.
Both servers were fed by a standard European 230V (16 Amps max.) powerline. The room temperature was monitored and kept at 23°C by our Airwell CRACs. We used the Racktivity ES1008 Energy Switch PDU to measure power. Using a PDU for accurate power measurements might seem pretty insane, but this is not your average PDU. Measurement circuits of most PDUs assume that the incoming AC is a perfect sine wave but it never is. However, the Rackitivity PDU measures true RMS current and voltage at a very high sample rate: up to 20,000 measurements per second for the complete PDU.