Description

The LAN sleeper... Walk into a LAN party and people say, "What are you going to do with that, put on a powerpoint presentation?" Little do they know...

Dell Optiplex 790 Small Form Factor Custom Dell power supply – 275W from an old Dell 745 SFF.

Processor Specifications: Core i7-2600

Clock Speed: 3.4 GHz

Memory Specifications: 8Gb DDR3. 12/5/15 Upgraded to 16Gb DDR3 1600.

Video Cards: 2 ea Sapphire HD7750 in CrossFireX.

128Gb SSD boot drive. 4Tb storage drive.

BluRay Drive

The build...

Remove the existing 240w troublesome power supply and replace with 275w larger style. The screw pattern was the same, but the wires were not. I had to lengthen them to reach the MB power supply header. I didn't splice them together, I resoldered each bundle individually. The case fit was tight, I had to remove the some of the back and mod the bottom PS case floor locks.

The video cards were too close together to use the stock heatsink and fans. I found some old X1300 heatsinks and machined off the areas that interfered with installation.

Cooling is provided by a double 50mm fan from the old Pentium III days and I added a small 50mm fan to assist in keeping the cards cool. I added a potentiometer to both the front and CPU fans for better control of the case temps.

It does get a little loud when running a game or benchmark, but it is ultraportable and fun to keep up with rigs three to four times its size. It's about a tenth of the size of a Cooler Master Haf X case...but about the same weight...just kidding.

The good... Core I7 2600 Quad, 8 threads. Boots in 10 to 15 seconds. Runs most games in "High" settings. Very portable, at 14lbs...throw it in a backpack.

The bad... No overclock...thanks Dell! Must mod the cover to utilize the video card fan cooling. No Wifi. No sound card, but stock stereo for headphones.

The Ugly...Its a Dell 790!

Not a build for the average everyday person, but a good experience none the less.

Part Reviews

CPU

Core I7...Need I say more.

Video Card

Fastest low profile, single slot card in the US.

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Comments

  • 51 months ago
  • 6 points

Laughs at PC Wait... it has an i7 and 2 GPU's?

Walks away in shame... Haha, awesome PC! +1

  • 51 months ago
  • 1 point

a real sleeper gaming PC

  • 51 months ago
  • 1 point

a real sleeper gaming PC

  • 51 months ago
  • 2 points

My school uses this pc for students. Yay everyone stick a core i7 and crossfire in it so we can run ie !

  • 51 months ago
  • 1 point

Looks kinda funny doesn't it?

  • 51 months ago
  • 2 points

Nah it looks boring. But, when they see you chewing up fallout 4 1080p 60fps, the look on your friends face WILL be funny. :)

  • 51 months ago
  • 1 point

hahaha this is awsome!

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  • 51 months ago
  • 1 point

Good job retrofitting the cards into that older case. We use the same pc's at work. It got me thinking what if I get myself one of those... I could be playing all day and the boos wouldn't even know haha. Sadly in real life it doesn't work that way. Anyway Good job on your build

  • 51 months ago
  • 1 point

Jammed packed full of goodness!

  • 51 months ago
  • 1 point

How can a 275 watt Power supply power an i7 and two 7750s!?!?! 1+ I'm impressed!

  • 51 months ago
  • 1 point

Max wattage for a 7750 is 50w. He is not even cutting it close.

  • 51 months ago
  • 1 point

Oh... That explains it. Oops.

  • 51 months ago
  • 3 points

It makes excellent toast in the morning, just butter it up and set on the the cover!

  • 51 months ago
  • 1 point

it nice to see picture of how it runs in 3Dmark Firestrike at 1080P or Unigine Heaven and Games like Crysis 3

  • 51 months ago
  • 1 point

Very nice build! +1 Any chance to see some temps reading and / or benchmarks?

  • 51 months ago
  • 1 point

you got my clicking on the build with such a title! Nice work, superb sleeper.

I'm sure it was worth it but I'm curious to know how much time in all the mods? how much money?

do the 50mm make a nice buzzing at full speed, I don't remember the P3-era being a silent one ;)

edit: funny, I cleaned some HD2400 last night and the had the SAME heatsink. I got bored after cleaning 3 cards and left the 7 others in the box. IF they work good for your 7750, then they'll be perfectly fine for the HD2400 (inside old HP DC SFF)

  • 51 months ago
  • 1 point

I've plugged the twin fans into the primary 7750 fan connector and the small 50mm side fan into the linked 7750 fan connector. Nice and quiet until you start up a game.

  • 51 months ago
  • 1 point

I absolutely love builds like this.

  • 51 months ago
  • 1 point

Always nice seeing someone revive an old build. Interesting custom cooling solution for the GPU's. I would not really consider it a con that you don't have a sound card, there is not really a reason to have one now of days. WiFi can be solved with a dongle. Very nice build.

  • 40 months ago
  • 1 point

I couldn't tell the difference until I started reading...impressive stealth sleeper!

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  • 51 months ago
  • 1 point

lol.. that was funny!

  • 51 months ago
  • 1 point

Nice!

  • 51 months ago
  • 2 points

With all the cables and peripheral it does get pretty heavy...good point!