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HP ProLiant DL360 G3 - Processor Identification


The HP ProLiant DL360 G3 server supports for up to two Intel Xeon Pentium processors with Hyper-Threading capability on NetBurst architecture.

While the HP ProLiant DL360 G3 server is capable of dual processors however comes standard with a single processor. Supported processors for this system are:
  • Intel Xeon 3.20 GHz/533FSB Processor and 2MB L3 Cache
  • Intel Xeon 3.20 GHz/533FSB Processor and 1MB L3 Cache
  • Intel Xeon 3.06 GHz/533FSB Processor and 1MB L3 Cache
  • Intel Xeon 3.06 GHz/533FSB Processor and 512KB L2 Cache
  • Intel Xeon 2.80 GHz/533FSB Processor and 1MB L3 Cache
  • Intel Xeon 2.80 GHz/533FSB Processor and 512KB L2 Cache
  • Intel Xeon 2.40 GHz/533FSB Processor and 512KB L2 Cache

The processors connect to the system controller through a 64-bit, quad-pumped 133MHz frontside bus, meaning that data is sent, or latched, four times per clock cycle. The effective clock rate is 533 MHz with a peak data transfer rate of 4.3GB/s. This is an improvement over previous designs that used a 400MHz front-side bus with a peak data rate of 3.2GB/s.

Netburst Architecture

NetBurst architecture uses these technologies to increase the performance of the Xeon processor:
  • Increased pipeline depth - A new 20-step pipeline doubles the depth so that the processor has less work to do in each step, increasing the performance, speed, and scalability of the processor significantly.
  • A rapid execution engine - Doubles the number of integer instructions executed in one clock cycle.
  • Streaming SIMD Extensions 2 (SSE2) - Improves multimedia applications, secure transactions, and visual internet applications.
  • Advanced Dynamic Execution - Improves speculative execution and branch prediction.
  • Execution trace cache - Reduced decoder latency speeds instruction throughput, improving response times.

Hyper-threading Technology

Hyper-threading makes each physical processor appear as two logical processors. To the operating system and application software it appears there are twice the number or processors than are physically present.

Operating systems that recognize logical processors can schedule tasks to the logical processors as if they were separate physical processors. The two logical processors can execute different tasks, or threads, simultaneously using shared hardware resources.

With more than one Xeon processor installed, these operating systems can schedule threads to separate logical processors on a single physical processor, as well as to separate physical processors, simultaneously.

Threads are always scheduled to logical processors on different physical processors before scheduling multiple threads to the same physical processor, as shown above. This optimization allows software threads to use different physical execution resources whenever possible.
NOTE: Hyper-Threading can be turned off in the ROM-Based Setup Utility (RBSU). This may be necessary for testing or verifying performance gains for enterprise applications.
Only operating systems with ACPI support Hyper-Threading and logical processors, because the logical processors are defined and reported to the operating system through the ACPI table in system ROM.
Supported Operating Systems
Supported Operating System
Hyper-Threading Support
Microsoft Windows NT 4.0 Server
Microsoft Windows 2000 Server and Advanced Server
Yes (Microsoft driver required)
Microsoft Windows .Net Server and Enterprise Server (Beta 3 or higher)
Yes (Microsoft driver required)
Red Hat Linux Advanced Server 2.1
SuSE Linux Enterprise Server 7
Novell Netware 5.1
Novell Netware 6
Yes (Hewlett-Packard driver required)
SCO OpenUnix 8.1
Yes (SCO driver required)
SCO OpenServer 5.07
Sun Solaris 8.1
Yes (Sun driver required)
IBM OS/2 e-Business



The cache memory on the processor chip is faster than main memory. It allows frequently accessed data to be available to the processors with less waiting. With models offering larger available cache and more levels of cache, the DL360 G3 realizes improved performance by reducing the time to fetch the data. In addition, larger processor cache reduces the average number of cache misses, further enhancing performance. A larger processor cache means the system can be used in CPU intensive environments such as databases applications that must access specific data multiple times in order to complete a calculation.

L2 cache vs L3 cache

  • The 3.06GHz, 2.8GHz, and 2.4GHz processor use 512KB of L2 cache. L2 cache is located on die, storing commonly used data closer to the processor. In addition, L2 cache is clocked at the same rate as the processor core, so as faster processors speeds are released, the L2 cache speed increases correspondingly
  • The 3.2GHz/2MB processor uses 2MB of L3 cache or 1MB of L3 cache depending on model. The 2.8GHz/1MB processor uses 1MB of L3 cache. L3 cache runs at half the processor core speed. A large L3 cache makes room for large instruction and data sets, providing a high-bandwidth path to memory, which reduces average memory latency and improves performance for mid-range and high-end server workloads. When an application's complete data set can be held in local memory, for example, the analysis will execute much faster.


Processor and PPM Socket Locations

This server can support up to two processors. Each processor has an associated processor power module (PPM) that must be present for proper operation of the server.

Figure 1: CPU/PPM Identification

PPM socket 1 (must always be populated)
Processor socket 1 (must always be populated)
Processor socket 2
PPM socket 2
NOTE: A PPM must be installed when a new processor is installed.
WARNING: To reduce the risk of personal injury from hot surfaces, allow the internal system components to cool before touching.
CAUTION: Processor socket 1 must be populated at all times. Failure to follow this process results in the system failing to boot and halting during the Power-On Self-Test (POST). This error will result in the system not functioning properly.


Legal Disclaimer: Products sold prior to the November 1, 2015 separation of Hewlett-Packard Company into Hewlett Packard Enterprise Company and HP Inc. may have older product names and model numbers that differ from current models.

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Document title: HP ProLiant DL360 G3 - Processor Identification
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