Intel Core i5-2500k 3.3 ghz
MSI P67A-GD65 Socket 1155
G.Skill 16gb (4x4gb) DDR3 1600
Sentey GSP850-SM PSU
Sentey BX1-4284 v2.1 Case
XFX Radeon HD 5770 1gb
OCZ Solid 2 Solid State Drive 60gb
1.0T (x2) SATA 3.5″ drive
2.0T (x1) SATA 3.5” drive
Asus Wireless nic
The flat modular cables worked without too much difficulty. The cable routing job in the case I used wasn’t the cleanest, but I had plenty of room left on the mandatory cables to support a full tower case. Sentey included thumbscrews for the PSU which is something I haven’t had before, but it was a bit easier to mount the PSU into the case with them.
Using a Kill-a-Watt meter I measured system draw under idle and load conditions. The most important thing I learned since rebuilding this system is that I wasn’t drawing anywhere near the load I thought I was. The Sandy Bridge build seems to be idling a lot lower than I remember my old system at. To get a full load reading I ran OCCT’s power supply testing tool which loads both the CPU and GPU. I was able to get the draw a little higher by running MaxCPU and a GPU benchmark at the same time. Either way the full load was coming in at only 295w which means that I can’t currently come anywhere near straining this PSU. I am not even hitting the 50% mark which is usually the “most efficient” range for PSU utilization.
Using a digital multimeter, I took voltage readings at the back of the connector under idle and load conditions. The +12V and +5V rails had a very small variation, but only 0.01V for both. The +3.3V saw no measurable change between load and idle.
Remember this is an 80Plus compliant power supply. This means it meets the criteria for Gold rating of 87/90/87% minimum efficiency at 20/50/100% load as certified by 80Plus.org testing. According to the test which was conducted in late 2009, the GSP850-SM scored 88.70% / 90.97% / 88.74% with an average efficiency rating of 89.47%.
Unfortunately these are the only tests we are capable of conducting at this time. We do not have access to expensive power supply testing equipment nor would we expect most of our readers to understand the detailed findings that such equipment outputs. If you are an electrical engineer or a hardcore PSU enthusiast, I would suggest you check out some other more detailed reviews on this unit or any other before making a purchasing decision.
Let’s wrap up this review with some thoughts and conclusions on the next page.