GTX Titan on 500W?

rbryant73

Distinguished
Apr 19, 2015
27
0
18,530
Hello,

I recently put together the following gaming system:

-Core i5 4460
-Gigabyte GA-Z97X-UD5H motherboard
-Crucial Ballistix Tactical 2x4GB
-Samsung EVO 850 500GB SSD
-WD 500GB HD (SATA 3)
-Corsair CX 500W PSU (80+ Bronze)

I was planning to buy a GTX 970 down the road, getting by on integrated graphics until then. I checked PCPartPicker and all the components looked to play nice together (including the video card), with a wattage breakdown of 321. But a few days after I built the rig, an acquaintance mentioned he had a GTX Titan he could part with. I'm 99% sure it's this model:

http://tinyurl.com/nxfqlpe

Anyway he gave it to me in exchange for some work I did for him, so the price was as right as you get. My concern is, Newegg specifies "600 watt or greater power supply with a minimum of 42 amps on the +12 volt rail." My PSU specifies +12V@38A.

This guy is an IT pro and longtime system builder, he knows a lot more about this stuff than I do, and the machine he pulled the card out of had this 600W PSU:

http://tinyurl.com/mfqx528

...which shows two +12V rails @35A. He said he thought I'd be fine with my PSU. And when I added the Titan to my parts list at PCPartPicker, the build still looked compatible. So after some deliberation, I installed the card in my system, with my 500W PSU, and fired it up, and it seems to work fine. In fact, Far Cry 4 screams.

Is this too good to last? I'm loving the frame rates I've seen in my short test sessions, but what should I be watching out for--temperature spikes, smell of burning components, popping sounds? Do I need to monitor electrical activity and look for any worrying trends?

Or am I okay, because the power requirement is conservative? (Obviously I'm hoping for this outcome.)

I'm a little nervous and, as may be evident, I don't know much about volts and wattage.

Thanks for reading,

Rich
 
Solution
You may be able to get away with it, but personally i wouldn't use it for too long with that power supply, and would consider upgrading it before too long.. EVGA even recommends a minimum of 600 watts on your power supply for that card. If you do in fact consider upgrading, i recommend getting a power supply from Tier 1 or 2. http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html

**I myself have a grudge against the Corsair CX/CXM series power supplies after i had one take out half of my system.**

SkylerJacobs

Reputable
Jan 26, 2015
685
0
5,360
You may be able to get away with it, but personally i wouldn't use it for too long with that power supply, and would consider upgrading it before too long.. EVGA even recommends a minimum of 600 watts on your power supply for that card. If you do in fact consider upgrading, i recommend getting a power supply from Tier 1 or 2. http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html

**I myself have a grudge against the Corsair CX/CXM series power supplies after i had one take out half of my system.**
 
Solution

Eximo

Titan
Ambassador
The ratings from Nvidia are estimated total system power consumption for the average computer. Actually values, especially with an Intel system are much less.

84W processor, worst case 247W Titan, rest of the system.

CX500 is rated at a grand total of 456W on the 12v rail, so you have about 125W to spare for the rest of it. Now that is 100% full load on both GPU and CPU which is not likely to ever happen.

I wouldn't trust that quality of power supply long term, but you should be right in the realm of the 60-80% load a power supply is most efficient at during gaming.