FAQ

Updated Oct 6, 2009

Q: Does GT3 support full size ATX motherboards?
A: Yes, GT3 is the *only* small form factor PC that supports full size ATX motherboards.

Q: Which ATX motherboards does GT3 Support?
A: GT3 supports ATX motherboards with PCI-Express x16 connector in position number 6 or position number 7.

Q: How do I determine position #6 or #7?
A: Connector 7 will be about 1/2" from the I/O panel, connector 6 will be about 1.5" from the I/O panel. See Image. Additionally, if you would like us to confirm compatibility of a motherboard you are considering, contact us at This e-mail address is being protected from spambots. You need JavaScript enabled to view it . Include the motherboard model number and we will promptly provide you with an answer on compatibility.
*GTR Recommends motherboards with solid capacitors.

Q: Which graphics cards work with GT3?
A: GT3 supports double slot graphics cards with lengths, including the power connectors, up to 9.5 inches.
Video cards supported include, but not limited to:
ATI Radeon™ HD 4850 Series and lower(GTR Recommends Sapphire Vapor-X HD 4850)
ATI Radeon™ HD 4770 Series(All cards we reviewed meet size requirements)
Nvidia GeForce GTS 250 Series (GTR Recommends XFX GTS 250)
*GTR recommends video cards that draw air in from the front of the video card, exiting out the rear. See Image

Q: Does GT3 support ATI's Radeon HD 4870 and 4890 Graphics cards?
A: With a small modification, yes. Contact us at This e-mail address is being protected from spambots. You need JavaScript enabled to view it if you are interested.

Q: Does GT3 Support ATI's Radeon HD 5000 Series graphics cards?
A: The HD 5850 model card should plug right into GT3, right out of the box. Though, this card is not available yet to confirm compatibility. Preliminary information indicates there is a really good possibility GT3 will support ATI's Radeon HD 5850 Series Card; the reference design looks like it is less than 9.5" in length(power connectors included - the power connectors come out the side of the card) and it utilizes no more than two 6-pin PCI-Express power connectors.

Q: What CPUs work with GT3?
A: AMD Phenon, AMD Phenom II, AMD Athlon , Intel Core 2 Duo, Intel Core i7, and many others. All processor models work with GT3.

Q: What CPU Heatsink/Fans work with GT3?
A: Heatsink/Fans provided with the CPU, are ideal for GT3. Alternatively, thermal solutions need to be less than 80mm in height.

Q: What memory works with GT3?
A: GT3 accommodates memory sizes up to and including 1.7” in height. This includes most memory available in the market, today. Memories modules with protruding heatsinks are not recommended.

Q: Which backpacks and/or carrying cases works with GT3?
A: Many 20" backpacks and carrying cases work with GT3. Just be sure the capacity is adequate for GT3's dimensions, 12.5" x 4.5" x 15.4". If you would like help selecting a backpack, feel free to contact us at This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Q: Is GT3's power supply adequate for the GT3 system I plan to build.
A: Yes

Q: Is GT3's Power Supply(PSU) 350 or 370 Watts?
A: GT3's PSU lable is incorrect. The output rating was mistakenly measured at 35C(95F) instead of room temperature, 25C(78 F). GT3's PSU is rated 370W at 25C.

Q: I was told I need a jigawatt power supply and GT3's is 370 Watts?
A: See GTR's Technical Whitepapers for hard data on actual power consumption and GT3's Power Supply output.