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Dual CPU Upgrade

40hz
40hz asked
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Hello all.

I've been asked to upgrade our virtual server hosts to get max performance.  The servers in question are:

HP ProLiant DL365 G1

I have found HP's recommended CPU's to upgrade.

My question is about the CPU themselves.  To upgrade the servers, I would need to purchase is:

Dual Core AMD Opteron 2222 (90nm)

Frequency: 3000
Socket Type: F
Power Wattage: 95
Bus Speed: 1000
Stepping: Not Specified

AMD offers quite a variety of F socket type processors.  Is it possible for me to get a higher core processor of the same socket type?

I was taught that as long as the socket type is the same, you are pretty much free to pick what ever CPU you can afford (PC's).  Is there a different rule of thumb with servers?

On paper, will this work?  I'm considering the following:

Six Core AMD Opteron 2427 (45nm)
Frequency: 2200
Socket Type: F
Power Wattage: 75
Bus Speed:  4800
Stepping:  D0

Since this is our production VM hosts, the last thing I would want is to crash all of the VM's contained within, so I would be more than happy sticking with HP's recommended CPU's.
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Commented:
When upgrading multi-cpu server both CPUs need to be the same and need to be supported by the MB. So you can either upgrade with one same processor that you have now, or buy 2 better CPUs, but make sure they are supported by the MB (a bios update sometimes adds CPUs which were not supported before)
kevinhsiehNetwork Engineer
CERTIFIED EXPERT

Commented:
Here's a question: is your existing CPU actually busy? I ask because even on my hosts running 20+ VMs, overall CPU utilization is less than 15%.
If the server is under warranty I'd suggest going with the HP suggested processors.

If it isn't, tomaskir is correct in saying you need to have two of the same processor and they need to be supported by the motherboard.

The supported processors listed are:

AMD Opteron™ Processor 2222 (3.0 GHz, 95 Watts)
AMD Opteron™ Processor 2220 (2.8 GHz, 95 Watts)
AMD Opteron™ Processor 2218 (2.6 GHz, 95 Watts)
AMD Opteron™ Processor 2218 HE (2.6 GHz, 68 Watts)
AMD Opteron™ Processor 2216 (2.4 GHz, 95 Watts)
AMD Opteron™ Processor 2216 HE (2.4 GHz, 68 Watts)
AMD Opteron™ Processor 2214 HE (2.2 GHz, 68 Watts)
AMD Opteron™ Processor 2210 (1.8 GHz, 95 Watts)
AMD Opteron™ Processor 2210 HE (1.8 GHz, 68 Watts)

I'd steer clear of the Opteron 2427 as it's not listed. The highest they list as supposed are teh Opteron 2222 so I'd go with those.

You don't have to buy from HP, just make sure they are the right processor.

Author

Commented:
Thank you all for the reply.

@kevinhsieh:  Yes at times, I get alarmed of high CPU usage.  Especially from our Citrix VM which will be dependent on how many users are logged on and what they are using.  But on average the VM's are using 25-30% with 5 VM's per host.  I realize I have quite a bit of head room, but not nearly as much as I'd like to feel comfortable.

@tomaskir & JRassumaa:  The server is no longer under warranty.  I will go with both of your suggestions and get the highest supported processor.  

Once again thank you all for the advice and the quick reply!

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