Mr Bill wrote:So, the system in the sig used to have an Asus Radeon 4770 and I upgraded to the XFX R7870 Double Dissipation (2GB memory GHz edition). The power draw on my UPS is typically showing around 205W load at present and jumps up to about 350W when actually playing WOW. I have been occasionally smelling a burnt smell from the PSU. Seems to me I may be pushing the limits? Maybe this card is a bit much for my PSU?
Well PSUs do degrade over time and although i didn't look up the model you have, i presume it's a few years old. If you have the budget and you smelled something coming out of the PSU, ofc an upgrade is in order. There is a slew of new PSU offerings, even Plantinum rating at ~100 bucks.
Edit, here are XFX's recommendation on the 7870 double D
External Power - 6-Pins:2
Minimum Power Supply Requirement:500 watt
XFX Recommended Power Supply:XFX 650W PSU
■500W (or greater) power supply with one 75W 6-pin PCI Express power connector recommended ◦600W power supply (or greater) with two 75W 6-pin PCI Express power connectors recommended for AMD CrossFire™ technology.
Since ur PSU might be an older model the 12V ratings might have degraded or maybe they weren't high enough to beging with (what's the combined amps on the 12V for that PSU?).