GeForce GTX 470 — detailed view
Determination of temperature levels, overclocking potential and possibilities to use alternative ways of cooling of GeForce GTX 470 video cards
|Motherboard||DFI LP UT X58-T3eH8|
|Processor||Core i7 920@4400HT|
|Memory||G.SKILL Trident 6GB F3-16000CL9T-6GBTD|
|Video card||EVGA GTX 470 SuperClocked|
|Hard drives||2 x VelociRaptor WD1500HLFS RAID0 / Hitachi P7K500 500Gb|
|Case||Benchetto 101 open teststand|
|OS||Windows 7 64-bit|
Motherboard and CPU liquid cooling.
GTX 470 at work
I used 3DMark Vantage for a short card performance test since it (test) is a tool that gives an overall performance score.
17520 points — not a bad result at all. However, PhysX technology, rarely used in games, significantly effects the overall score. So we turn off PhysX in driver settings and repeat the test:
Despite the overclocking, the number of final points significantly decreased — total video card’s score has not changed reaching 14000 points, however, the number of points for the processor test has fallen from 64.679 to 27.248. Still, there is a lot of potential behind PhysX, but its hard to find a real application that uses this technology. Number of PhysX supporting software can easily be counted by the fingers of one hand. So, we now have a basic picture of performance results, but what about temperatures?
Let’s see what happened with the card during the test:
During tests the ambient temperature was 25°С, GPU temperature hit 93°С, but no worries — GPU GF100 critical temperature is 105°С. Stock cooling system fan’s ans speed increased to 3600 RPM while making a terrible hum. To tell the truth — the noise generated by the card at Load makes you feel really uncomfortable.
At Idle, card uses its power saving features by reducing clocks and voltages:
|Core Clock||Memory Clock||GPU Voltage (measure)||Temperature at 25°С|
|Desktop||50 MHz||65 MHz||0.88 V||46|
|Blu-Ray Playback||405 MHz||162 MHz||0.89 V||53|
|3D Load||625 MHz||850 MHz||1.06 V||93|
To deal with temperature and noise level issues I tried reducing GPU voltage using MSI Afterburner 1.6. After several attempts to change voltages I found that for card to work at stock (factory) clocks 0.95 V (1.0 V according to multimeter) is enough:
GPU temperature fell a bit — from maximum of 94°С to 91°С, however, fan’s speed decreased noticeably — from 3600 (78%) to 2700 (65%). Now video card runs much quieter, so this is the way to fight noise.