DIY eGPU experiences

[noric]

Hello everyone!
I'm thinking of doing an eGPU for my notebook.
I'm looking for a PSU, possibly micro-ATX, that supports a 2x6pin graphic card, so I need up to 225W on the 12V rail(s). I was wondering if this PSU would be good: Techsolo TPS-400.
I'm doubtful about the output distribution on the two 12V rails of this PSU; according to the datasheet the output is:
3,3V : 16A | 5V: 10A | 12V(1) : 14A | 12V(2): 10A | -12V: 0,3A

But how do I know which connectors deliver power from which rail? If the 3 molex (I would join 2 of these in a pciexpress, and plug the other one in the PE4H) and the pciexpress are on the same rail, would it exceed the current limit?

Here's the link to the product: http://www.techsolo.net/site/product...1&&class_id=37
And here is the datasheet (in italian, the english one is broken): http://www.techsolo.net/download/ITA-TPS-400.pdf

Thanks in advance!

[kizwan]

Hi noric,

Only one rail will be use. With dual-rail ATX PSU, +12V2 is for the 4 pin connector (also known as "ATX12V" or "P4" cable) and +12V1 is for everything else. So, you will only use +12V1. According to the Techsolo TPS-400 PSU specification, +12V1@14A = 12V * 14A = 168W. So, it can only drive a GPU with power requirement lower than 168W. Don't choose a graphic card with power requirement too close to 168W. For example, if the GPU of your choice is GeForce GTX 460 (1GB), I doubt this PSU will able to supply stable peak 160W of power required to drive this card.

[snakedf]

Your Acer Aspire 5745G can use DIY eGPU. With Intel HD Graphics, you can do x1.Opt (with Optimus) setup. Please install Setup 1.x. Boot into Setup 1.x & take a screenshot of the main screen. There is instruction in the main screen on how to take a screenshot. Post the screenshot here.

i have this...

[User Retired 2]

i have this...

I see by the last command buffer in the bottom left that you've enabled the iGPU so it appears but it won't work unless it's wired to your LCD. Is the iGPU on by default after you boot? If not then you can't do a x1.Opt installation. Your port layout also doesn't indicate x2 is possible either and you probably don't have an expresscard slot. In which case I'd suggest selling your notebook for one from this list - the can do a x1.1 Optimus (and soon x1.2 Optimus) DIY eGPU installation for superior performance.

[kizwan]

TOLUD is 2.5GB & available PCI space is 512MB. You only need 256MB PCI space for eGPU. Everything are looking good.

I checked the Aspire 5745G specification & I found out it doesn't have ExpressCard. So, you'll need to use the mPCIe port which currently use by wireless card. You will need a PE4L-PM3N ver1.5 Package. If you live in US, you can get it from HIT.

@nando, I checked in Acer Support: Acer Aspire 5745G Notebook Series Specifications & it does have Intel HD Graphics. This notebook have Nvidia Optimus.

[noric]

Hi noric,

Only one rail will be use. With dual-rail ATX PSU, +12V2 is for the 4 pin connector (also known as "ATX12V" or "P4" cable)

Thanks kizwan! That's what I feared... What about buying a 2xMolex to 1xPCIexpress cable, cut the Molexes, and plug the wires into the P4? Is this smart or foolish? (no P4 to pciexpress available on ebay)

Thanks again!

[kizwan]

Not good idea. It will fried your graphic card OR PSU.

[mekanik11]

hi can someone help me from following pic to see if eGPU is possible on following pc-HP dv6-3016tx.. I requested this off from user of this laptop from another forum.. from the pic the first PCI bus had 9FA00000, which i was not sure was the right PCI bus i was reading?

[Khenglish]

hi can someone help me from following pic to see if eGPU is possible on following pc-HP dv6-3016tx.. I requested this off from user of this laptop from another forum.. from the pic the first PCI bus had 9FA00000, which i was not sure was the right PCI bus i was reading?

9FA00000 is the right number. This corresponds to a TOLUD of 2.5GB, leaving you plenty of room for an eGPU.

[mekanik11]

9FA00000 is the right number. This corresponds to a TOLUD of 2.5GB, leaving you plenty of room for an eGPU.

Thanks Khenglish...