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Old 03-12-2006, 12:54 PM   #1
eva2000
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Talking [info] 8800GTS SLI system power draw measured

Seems like alot of the recommended SLI power supply specs are specified for 8800GTX SLI and not many are clear for 8800GTS SLI so time for some Power-mate power draw measurements with 8800GTS SLI installed to see what really is being consumed wattage wise

AFAIK, 8800GTS SLI has same or similar power requirements as 7950GX2 video card ?

As you can see for single PCI-E spaced DFI NF4 Ultra-D, having 2x 8800GTS SLI just fits


FX-60 stock with 8800GTS SLI stock windows start up system power draw = 277.3 Watts.


System:
Power-Mate Peak power draw measurements



-----------------------------------------------------------------
@2612Mhz - 13x200HTT at 1.35v bios (1.312v)

8800GTS SLI @513/1584 stock
PC/Windows start up = 277.3W (1.286A)
Stressprime Orthos Small FFTs = 297.4W (1.314A)
3Dmark06 = 370.9W (1.629A)
PCMark05 = 322.4W (1.426A)

8800GTS SLI @650/2010
Stressprime Orthos Small FFTs = 307.1W (1.388A)
3Dmark06 = 408.9W* (1.842A) (DMM measured +12v rail min/max/average = 12.22v/12.23v/12.228v)
PCMark05 = 354.1W (1.555A)

* Seems 3Dmark06's HDR/SM3.0 HDR1 test - Canyon test draws the most system power draw in 8800GTS SLI config. While rest of time 3Dmark06 fluctuated between 340-390W system power draw.


-----------------------------------------------------------------
@3006Mhz - 9x334HTT at 1.45v bios (1.408v)

8800GTS SLI @513/1584 stock
PC/Windows start up = 308.2W (1.318A)
Windows Idle = 235.2W
Stressprime Orthos Small FFTs = 337.5W (1.514A) (DMM measured +12v rail min/max/average = 12.23v/12.23v/12.23v)
3Dmark06 = 395.7W (1.757A)
PCMark05 = 345.1W (1.529A)

8800GTS SLI @650/2010
Stressprime Orthos Small FFTs = 297.4W (1.314A)
3Dmark06 = 433.4W (1.934A)
PCMark05 = 375.8W (1.697A)

-----------------------------------------------------------------
Looks like 600W OCZ EvoStream should be able to handle 8800GTS SLI without problems. Specs for 600W OCZ EvoStream power supply



Some info to think about.

For those that are wondering in theory:
* FX-60 stock has TDP = 110W
* FX-60 @3006Mhz at 1.45v = ~147W
* Intel Core 2 Duo E6300-6700 = 65W
* Intel Core 2 Duo E6600 @3600Mhz at 1.45v = ~113W
* Intel Core 2 Extreme X6800 = 75W

A single 8800GTS has following requirements according to the box:
A 400W PCI Express-compliant system power supply with a combined 12V current rating of 26A or more (Minimum system power requirement based on a typical PC configured with an Intel Core 2 Extreme X6800 processor)
X6800 is around 75 or 6.25A so that leaves 19-20A for single 8800GTS and rest of the system components.

We know from Anandtech testing that a single 8800GTX uses approximately 10W more at idle and 20-30W more under load than a 8800GTS http://www.anandtech.com/printarticle.aspx?i=2873


.

Last edited by eva2000; 03-12-2006 at 01:25 PM.
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