AMD's 2010/2011 Roadmap from the IT Professional’s Perspective
by Johan De Gelas on November 23, 2009 12:00 AM EST- Posted in
- IT Computing
Server CPUs in 2010
AMD’s best core in 2010 is a slightly improved revision of the current six-core Opteron “Istanbul” with the following additions:
• Finally a “real” C1E state which reduces power for each core that is idleing
• Support for DDR-3
In theory, DDR-3 1333 offers 66% higher bandwidth, but in practice the Stream benchmark does not measure more than a 25% boost in bandwidth. The latency of going off-die is about the same. That means that the performance increase in most server applications will not be tangible. Only the most bandwidth intensive HPC applications will get a boost of 10 to 20%.
Currently, AMD's six-core Opteron can match the performance of Intel’s quadcore Xeon 5500 at the same clockspeed in some important server applications: OLAP databases, virtualization and web applications. Intel’s best Xeon wins with a significant margin in OLTP, ERP and rendering. A large part of the HPC market is a lost cause: a quadcore Intel Xeon 5570 at 2.93 GHz is about twice as fast as a AMD Opteron 2389 at 2.9 GHz. The fact that we could not find any Opteron 2435 results in LS-Dyna is another indication of what to expect: the 10-20% higher performance in HPC applications will not be a large step forward.
Intel is going to increase performance by 20-30% per CPU (50% more cores), while AMD’s CPUs will see only marginal increases. So basically, Intel’s performance advantage is going to grow by 20 to 30%, except in HPC workloads where it is already running circles around the competition. Not an enviable position to be in for AMD.
Suppose that you are the strategic brain behind AMD. The competition offers better “per chip” and “per core” performance. The last thing you want to do is to offer the same kind of server platform. If a six-core Opteron (“Lisbon") goes head to head with a six-core Xeon (“westmere EP”), it will not be pretty: the Intel chip will beat the AMD chip in performance and performance/watt (remember, westmere EP is a 32 nm CPU). Despite this, AMD found some clever ways to make their server platforms interesting…
Cheaper 4-Socket Servers
“Know your enemies and know yourself”.
In which usage scenario’s are Intel’s offerings less compelling? The Nehalem-EX is a powerful platform, but it is also a completely different one than the “Westmere EP” platform. The Nehalem-EX's most important market is the 4-socket/8-socket x86 market, where about 400,000 servers are sold per year, or about 5% of the total x86 server market. It is also a pretty complex platform with two I/O hubs and 16 (!) memory buffers chips on a 4-socket board. The Nehalem EX platform does not only want to conquer the high end 4 and 8-socket x86 server market, it also wants to convince the more paranoid RISC and Itanium buyers:
Our first impression is that AMD will find it hard to win the high end database and ERP market. The quadcore Nehalem 5500 already outperforms the six-core Opteron “Istanbul” by a large margin (30-50%). The Opteron 6100 also has 50% more cores, but it is likely that a “native octalcore” will scale a bit better than a two times 6-core design. For the virtualization market, the higher amount of DIMM slots are an advantage for the Nehalem EX. At first sight, it looks like it will be pretty tough for AMD to regain market share in this part of the server market.
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