Can I use graphics cards on DQ77KB?

[idata]

There is a PCI-E 3.0 x4 slot on DQ77KB. I think it is possible to use graphics cards on the board by using PCI-E x4 to PCI-E x16 cable. But I've heard that DQ77KB can only afford 25W power on the PCI-E slot. Is it true? Can I still use a graphics card on it?

[idata · Accepted solution]

Hello,

To answer your question, yes is true. The motherboard is designed to provide up to 25 W to the PCI Express x4 slot. Please check the Technical Product Specification page# 77 posted at the following website:

http://downloadmirror.intel.com/21339/eng/dq77kb_TechProdSpec04.pdf http://downloadmirror.intel.com/21339/eng/dq77kb_TechProdSpec04.pdf

You can use a graphics card as long as it does not exceed the 25 watts.

[idata]

I'm running a Sapphire 7750 LP (TDP 55W) on my DQ77KB (with a i7-3770S) and it seems to work fine. I play Skyrim, Mass Effect 3, Crisis 2, etc on it and I don't have problems. Although if gaming was your primary purpose I would look into a different board with a x16 PCIe slot as well as a flex PSU (assuming you have an its case) that will supply 400W so you can use a better card than my 7750.

[idata]

I finally run a Yeston r7770 1GHz 2048M (TDP 80W) on my board. I choose three 12V pin (system fan, LED panel, sata power) and three ground pin to construct a 6-pin external power supply for my graphic card. Also running well .

Anyway, thanks a lot~

[idata]

I'm impressed

[idata]

How's that GPU running for you? I'm thinking about a new project, but the PCIe slot need to provide 75W to the GPU. Even though your GPU has a 6-pin connector, default behavior would be to draw 75W from the slot before it ever uses the 6-pin. Is it running well for you without crashes, driver issues, etc.?

[Ravikumar_B_Intel]

Hi,

It should be fine with connecting power cable to GPU.

[idata]

Scott, where is your info for "default behaviour" of drawing from the PCIe port first? From all the bitcoin sites I've been reading, it simply draws current from any attached port with the least current resistance.

Even then, you could re-route the voltage lines on the PCIe port to a 12v line connected to a seperate PSU, like the original poster. I believe it's A2, A3, B1, B2 and B3 for the 12v lines.

Also, https://bitcointalk.org/index.php?topic=76121.0 https://bitcointalk.org/index.php?topic=76121.0

[idata]

Currently powering my GTX 660 with a 12V power brick to the 6-pin power. I have a down step regulator that ill test in the next few weeks and if it works, ill be able to just use my one 330W 19.5V power brick for bone the MoBo and GPU.

http://www.overclock.net/t/1363969/liquid-cooled-nes-pc/20 Liquid Cooled NES-PC

[idata]

VERY nice Scott!

My project isn't too far off from yours in size, I can't wait to get started!

[idata]

Hi Scott. Please tell me how you put your card in the x4 slot, if you use something for an additional power supply ?