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AnthonyK
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support for upgrading a dc7800 sff with a QC 8400

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Hi

 

I purchased my HP DC7800 desktop from a broker who got a stock of HP desktops obtain from a bankruptcy back in '09. Now I got myself a copy of Vista Business x64 and 4 Gigabyte of DDR2 ram from OC Z - (

OCZ Geheugen Platinum DDR2,1066-4GB KIT 1066MHz,Lat 5-5-5-18,2x2GB )

It runs like a charm but with an E6750 Core 2 Duo (Conroe) CPU I would like to come into contact with anyone who replaced their stock CPU in a DC 7800 or DC 7900 with an Quad Core E 8300, E8400  model. I am do a bit more video editing lately and run some legacy programs under Oracle VirtualBox for x64 with guest OS - NT5/NT5.1 (Win 2000 and XP Pro x32).

Regards

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Hanspuppa
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Hello AnthonyK, While I don't have, or know anyone that owns one of these systems, the specifications for your system does show that it supports the E8300 @ 2.83 ghz, and the E8400 @3.00 ghz, and the E8500@ 3.16 ghz. These are all running at the 1333 ghz speed.

 

Here  is a link to the specifications and processor support for this system.

 

You should be aware that this system shipped with a 365 watt power supply, so it may be necessary to upgrade the power supply, depending on the power consumption of the CPU you choose.

 

Hope this helps.

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AnthonyK
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While that sure does .. your response raises the question how would I upgrade my 365 watt power supply (transformer) that came with the Small Form Factor

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Hanspuppa
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Hello AnthonyK, I did a little more research and found this interesting information.

 

It seems the E6750, the E8300 and the E8400 processors both have a base thermal TDP of 65 watts.

 

This means they are built on the same process core, with just different speeds.

 

Intel seems to have been able to reduce the thermal wattage of these processors with the 45nm die.

 

Your current E6750 has an idle current draw of 123 watts total system power draw and a stressed current draw of 163 watts.

 

The E8300 has an idle current draw of 128 watts total system power draw and a stressed current of 158 watts.

 

The E8400 has an idle current draw of 131 watts total system power draw and a stressed current draw of 158 watts.

 

These are well within the limits of your current processor.

 

I don't believe an upgraded power supply would be required. These processors, since they would be running at higher speeds, may create a little more heat, but if you clean the system throughly when you change the CPU, you should be fine.

 

Sometimes, a BIOS update is required when the processor is upgraded. Here  is the link where the BIOS can be found if your system requires one. You can check the BIOS first and see if there is a newer version available.

 

Just some thoughts.

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Big_Dave
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Look at the HP m9200t specificaitions.  It has all of the processors that you might consider and it only has a 350 watt PSU.

HP ENVY 6055, HP Deskjet 1112
HP Envy 17", i7-8550u,16GB, 512GB NVMe, 4K screen, Windows 10 x64
Custom PC - Z390, i7-9700K, 32GB, dual 512 GB NVMe, dual 512 SSDs, 4K screen, OC'd to 5 Ghz, NVIDIA 2080TI 11GB
AnthonyK
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Hi Dave

 

I think I know why you prompted me this link, but I do not feel that this consumer Desktop is what I want/need. I guess I have been spoiled with the build quality of my used DC 7800 SFF. I will not settle for anything less.
Perhaps I am wrong here but the consumer desktops like the Essential series are not up to standard buildwise compared to the Advanced and Elite Desktop series like my 2 yr old DC7800.

 

I scoff at the Pavilion series which I feel are HP unworthy and build like plastic you got from a Korean Hifi stereo set in the Eighties of the last century.

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AnthonyK
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I thought I would give people an update on my planned upgrade from a E6750 to a Quad Core L775 processor.

I had the chance to buy a Q9450 which would fit nicely into my DC7800 as the specs here would suggest, however I came too late. The seller had sold the Q9450 for around 135 Euros just the other day. Now he still has an Q9400, which still would be a major improvement from my E6750. However this one does not seem to be supported by my DC7800 mainboard or am I wrong here?

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Paul_Tikkanen
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Hi:

 

Please see page 9 of the document provided at the link below for a listing of supported processors in a dc7800.

 

http://h18004.www1.hp.com/products/quickspecs/12744_div/12744_div.PDF

 

You are correct in your conclusion that the Q9400 is not a supported processor.

 

Note:

 

C2Q processors are not supported in the USDT

 

Paul

AnthonyK
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Best for 2011 Paul and others who may view this thread.

 

Paul, I am fully aware of the limits within a USDT, but mine is the bigger sister/brother, the DC7800 SFF not the baby DC7800 thinclient.

 

A shame though, not to be able to use another Quad Core L 775 processor like the Q9400 which seems to be the actual successor to the  Q9300 which by the way IS supported by the mainboard. At least officially.

 

I am trying to get my hands on a QC that has at least 6 mb of L2 Cache memory, 8 - 12 mb pref. - The Q6700 has that 8 mb. I need more processing power than my current E6750 can offer with a full load of a Oracle VM VirtualBox - Windows XP Pro environment running as a guest OS on top of a Windows Vista x64 Business host OS which will have to deal with video editing, large Excel documents 300 mb large and a load for the IIS / webdevelopment on a Railo 3.1 server.

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Paul_Tikkanen
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Happy New Year to you too.

 

I'm sorry for the note about the USDT. I know you have the SFF, but I do that because others read these posts and I'd hate for someone who has a USDT to jump to conclusions and buy a C2Q and be very disappointed.

 

I buy used processors on eBay. I have never been disappointed.

 

Here is a listing for a Q9300 new in the Intel box for $145.00 ($108 euros). I know you don't live in the USA because you mentioned Euros, but this guy ships worldwide and has 100% positive feedback. You may also want to check eBay where you live. They have the Q9550's but they are $100+ more than this one.

 

http://cgi.ebay.com/Intel-Core-2-Quad-Q9300-2-5-GHz-NEW-BOX-SLAWE-/130469268252?pt=CPUs&hash=item1e6...

 

Paul

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