Archive for April, 2008


Ever Run a CPU Through the Washing Machine and Dryer?

Posted by: Linus on 29th April 2008

Yeah I didn’t think so.

Well I did. It was an accident. I was helping a friend change his CPU from an Athlon 64 6000+ (125W) to a 5000+ Black Edition (65W) because his room is so hot that the CPU is overheating, and rather than buy a new heatsink, this was his solution of choice. Whatever.

Here\'s the Athlon 64 X2 6000+ in question

So I told him “okay, I’ll take that 6000+ off your hands and give you a 5000+ Black”. I took the new CPU over to his house, put it in his machine, took the old CPU, put it in the plastic clamshell from the new CPU, and slipped it into my pocket “temporarily” until I could put it down somewhere.

**later that night**

Oh no. Linus forgot to do his laundy this weekend. Better get cracking. Chuck everything into the washer, put it in the dryer overnight, wake up and find an empty clamshell package floating around in the laundry in the dryer. At this point I realized what happened.

Anyway, to make a long story short, the pins were bent to crap, but it appeared (on the outside) to be otherwise undamaged. Electronics in general (and from now on I will assume this also applies to CPUs) are not actually harmed by being wet for a short period of time as long as they are not powered on while wet, and allowed to dry before using them.

After bending the CPU pins back to normal (or close to normal) using a metal tipped mechanical pencil (every geek should have one, just for bending pins), I tested the CPU today at work and it’s functioning. Full speed, boots into Windows, the whole deal.

pins have been bent back to normal

Please bear in mind I am not endorsing “washing machine” as a legitimate way of cleaning your CPU (cotton buds and rubbing alcohol are far more effective, take less time, less risky, etc), but it looks like all is not lost if you (like me) accidently wash a CPU.

Adding a PCIe Connector to a Power Supply

Posted by: Linus on 29th April 2008

The first thing I want to say about this post is that in 90% of cases this is NOT something that I recommend. Normally power supplies that do not have a PCIe 6-pin connector lack one for a GOOD REASON. They are not capable of supplying adequate power to a modern graphics card an they should be replaced. Here’s a short list of the criteria you should consider before doing this mod:

PSU Specs for SST-ST405 Power Supply

- Brand name power supply with a good reputation (I’m using a Silverstone Strider 400W for example)

- Adequate ratings on the 12V rail(s). (The one I’m using is rated for 14A and 15A on its two 12V rails)

- Warranty. You will be voiding it. Don’t do this to a power supply that is still under warranty

- Safety. If performed wrong, this mod could be very dangerous to your power supply, any computer you plug it into, and your health. You could be shocked, start a fire, etc. Check everything thrice.

- Cables – If you don’t have enough Molex or SATA cables as it is, you won’t be able to do this mod. Actually adding cables to the power supply is outside of the scope of this article. In the case of the 400W power supply I used, it has 3 cables each with 3 molex connectors. I decided to sacrifice one of them to be my new PCIe cable.

The new connector sitting next to the old connector

The first thing I did was clip the two molex plugs off my molex to PCIe adapter. Then I clipped the molex plug off the power supply leaving as much length as possible.

All the cables clipped off

Then all the wire ends were stripped so that they could be joined together.

Brown matches up with black

Once the wires are stripped, we have to figure out which wires to twist together. The easiest (and safest) way to do this is to use an existing adapter for the mod (which we did. We used a molex to PCIe adapter, and all we’re doing is making it permanent) so that you can match up the wire colours by simply plugging it together. In this photo you can see that black goes to brown/black, and yellow goes to uglier yellow. The red does not go anywhere so we’ll show you what to do with that later.

Everything is twisted together in threesomes....

Here you should spread everything out and check your work (obviously with nothing plugged in…). Do a quick sanity check and make sure that you’re basically recreating the conditions of the original adapter.

soldering connections together is MUCH safer long term.

It’s always best to solder wires together instead of just twisting them for a cable mod like this. We applied flux and solder to make sure that these won’t come apart. I speak from experience when I say that twisted/taped cables will eventually stop working correctly.

clipping off the red (5V) wire

covered in tape and ready to be tucked away

You want to make sure that any cables that are not supposed to connect are covered adequately. I’ve wrapped it in several layers of quality electrician’s tape, ensuring that the end is covered as well as all sides.

all of the cables are wrapped in electrician\'s tape

Here you can see the three cables that we’re still going to use are wrapped and ready to go

Putting sleeving over the modded cable

Now in order to make our mod more professional looking we’re going to use some cable sleeving, shrink wrap and zip ties to make this look as close to an original part of the power supply as possible.

The fniished product

So now you can hook up your PCIe graphics card without any unsightly adapters, and you’ve managed to turn a power supply that was only useful for low end systems (no graphics) to one that can take on a solid mid-range system again.

I’d just like to re-emphasize that it’s very important to test to make sure the power supply is good enough in the first place, so checking the amperages on the rails is a good way to do that, but another thing you can do is just use the adapter, power up the system, run some intensive stress tests, and see if the PSU works to power your graphics card. Yet another great resource is the tech support of your graphics manufacturer. You can read them the specs of the power supply and ask them if it’s enough.

Also I accept no liability if by following these instructions you bork your power supply, motherboard, any other hardware, yourself, your house, your other property, etc. This mod is performed at your own risk and is just there to offer guidance.

Category : How-To

Working on a Skulltrail System

Posted by: Linus on 28th April 2008

Just wanted to share some photos of an awesome water cooled system that I’ve had the pleasure of working on.

Skulltrail System with water blocks installed

A customer asked for a wicked crazy gaming (or whatever else you want to do, I suppose) system, so this is what I put together for him

2x Xeon 5430 Harpertown LGA771 CPUs

Intel D5400XS “Skulltrail” motherboard

4×2GB Buffalo FB-DIMM memory modules (PC2-6400)

2x Visiontek 3870 X2 video cards in Crossfire-X

Silverstone Decathlon 1200W Power Supply

4x 1TB HDD

LG DVD/BLU-RAY/HD-DVD Combo Drive

Auzentech X-fi Prelude

Fully customized water cooling system powered by Swiftech, D-TEK, Thermochill, Vadim, and Noctua with Feser One UV Black coolant

UV Cold Cathodes

Installed into the case

So I’ve made some progress on the build over the course of the day since I took that last picture, and one of the things I discovered is that you can’t use just any FB-DIMM memory in Skulltrail. I had initially thought that Mac Pro memory would work fine as long as it’s PC2-6400 (for best speed of course), but (silly me), the Mac Pro memory has HUGE heatspreaders on it, so if you’re looking for memory for your new Skulltrail system, be sure to get appropriate memory. The recommended SKUs are listed on the page for the Skulltrail board on NCIX.com

Better view of the board layout

Here’s a better view of the internals, and the loop order. The CPU on the left will have water coming directly from the pump in the bottom.

The engine room

And here’s where a Thermochill PA120.3 loaded up with Noctua fans is going to go to keep this beast cool. I may end up adding another radiator, but I’m not sure yet at this point. It’s going to depend on the temps. The customer is pretty flexible, and very patient, but as you can see, he’s going to get a VERY fine system. I’ll make sure to post some pictures of the system when it’s done with a little bit better lighting so you can see it all lit up in all its glory.

Category : Build Logs

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