eva2000

After doing the initial preview tests with 128MB Gainward FX5200 PCI video card here, it's time to swap out the 128GB Gainward FX5200 PCI video card for 2x 256MB BFG 7800GTX SLI video cards with modded bios at 473(525)/1350 clock speed and redo some tests


System:

• Intel Core 2 Duo E6600 QPGE B1 Step 5 ES
• Scythe Infinity + 2x Thermaltake 120x25mm 81cfm push-pull
• Intel D975XBX Bad Axe rev304 1334 bios
• 2x 256MB BFG 7800GTX SLI @473(525)/1350 84.56 drivers
• 2x1GB Gskill PC6400PHU2 HZ Micron D9GMH 0629 batch
• 2x 320GB Seagate 7200.10 SATAII hdds
• Pioneer DVD-RW Burner
• 1.44MB FDD
• 600W OCZ EvoStream modular power supply

I measured the system total power consumption using a Power-Mate power meter http://www.power-mate.com.au/. Ran 3dmark06 and PCmark05 and recorded the peak power draw values listed below.

@2400Mhz at 1.275v bios (1.259v)
Windows Idle watts = 187.7W
Windows Orthos Load watts = 231.9W
Windows TAT Load watts = 240.8W

PCmark05 = 359.8W peak

3dmark06 = 344.1W peak
Return to Proxycon = 337.9W
Firefly Forest = 344.1W
CPU1 - Red Valley = 253.5W
CPU2 - Red Valley = 266.3W
1 - Canyon Flight (SM 3.0) = 334.1W
2 - Deep Freeze (SM 3.0) = 335.7W



@3600Mhz at 1.425v bios (1.394v)
Windows Idle watts = 218.9W
Windows Orthos Load watts = 303.7W
Windows TAT Load watts = 324.4W

PCmark05 = 401.3W peak

3dmark06 = 394.8W peak
Return to Proxycon = 386.5W
Firefly Forest = 394.8W
CPU1 - Red Valley = 290.6W
CPU2 - Red Valley = 289.6W
1 - Canyon Flight (SM 3.0) = 384.9W
2 - Deep Freeze (SM 3.0) = 384.9W

For the stressprime 'Orthos' and TAT load tests there wouldn't be as much a power draw difference between 7800GTX SLI vs FX5200 PCI since there isn't any video card load in those tests. You can see the difference in power draw when video card load comes into play with 7800GTX SLI configuration.

Now to compare all the data including FX5200 PCI test in a nice graph

eva2000

Measured the power supplies rails using Digitech QM1538 digital multimeter which has data logging function via serial port or serial to USB adaptor. I used datalogging software to record an approximate 360 second interval for idle and load tests to get a min, max and average rail measurement.

Idle
+12v idle (min/max/average): 12.22 / 12.22v / 12.22v
+5v idle (min/max/average): 5.02 / 5.0.3 / 5.02
+3.3v idle (min/max/average): 3.419 / 3.419 / 3.419

dual stressprime load
+12v load (min/max/average): 12.22 / 12.22 / 12.22
+5v load (min/max/average): 5.02 / 5.02 / 5.02
+3.3v load (min/max/average): 3.415 / 3.420 / 3.4188

TAT internal cpu load test (both cores)
+12v load (min/max/average): 12.22 / 12.22 / 12.22
+5v load (min/max/average): 5.02 / 5.02 / 5.02
+3.3v load (min/max/average): 3.418 / 3.420 / 3.4182

PCmark05 test
+12v load (min/max/average): 12.21 / 12.22v / 12.2197v
+5v load (min/max/average): 5.02 / 5.0.2 / 5.02
+3.3v load (min/max/average): 3.412 / 3.417 / 3.4162

3dmark06 test
+12v load (min/max/average): 12.21 / 12.22v / 12.2145v
+5v load (min/max/average): not tested
+3.3v load (min/max/average): no tested

Idle
+12v idle (min/max/average): 12.21 / 12.22 / 12.22
+5v idle (min/max/average): 5.02 / 5.02 / 5.02
+3.3v idle (min/max/average): 3.417 / 3.419 / 3.4179

dual stressprime load
+12v load (min/max/average): 12.21 / 12.22 / 12.2131
+5v load (min/max/average): 5.02 / 5.02 / 5.02
+3.3v load (min/max/average): 3.373 / 3.418 / 3.4145

TAT internal cpu load test (both cores)
+12v load (min/max/average): 12.21 / 12.22 / 12.212
+5v load (min/max/average): 5.02 / 5.02 / 5.02
+3.3v load (min/max/average): 3.415 / 3.418 / 3.4152

PCmark05 test
+12v load (min/max/average): 12.20 / 12.22v / 12.2173v
+5v load (min/max/average): 5.01 / 5.0.2 / 5.0199
+3.3v load (min/max/average): 3.410 / 3.418 / 3.4141

3dmark06 test
+12v load (min/max/average): 12.21 / 12.22v / 12.211v
+5v load (min/max/average): not tested
+3.3v load (min/max/average): no tested

SLi_dog

Damn you're a busy man eva

65w extra drain with SLI'd 7800GTXs .



I suppose that's going to be considered moderate when the 8800s are out eh?

Yes or no. Do they drain a little more, alot more, or a heck of alot more??

eva2000

don't have 8800GTX/i680 yet heh...

I get promised alot of hardware by disties/manufacturers/retailers but probably 2/10 times it eventuates heh. Most consistent has to be OCZ though.. they follow through most of the time - nice being a OCZ beta tester for the past 5 yrs

Did a quick browse and seems alot of EvoStream reviews are out now

http://www.pro-clockers.com/reviews.php?id=167
http://www.ocia.net/reviews/oczevostream/page1.shtml
http://www.pcmoddingmy.com/e107_plug...hp?content.389
http://www.overclock3d.net/reviews.p...0w_modular_psu

eva2000

More tests

Time for some Power-mate power draw measurements with 8800GTS SLI installed. 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:

• FX-60 CCB2E 0536RPMW
• Scythe Infinity + Thermaltake 120x25mm 81cfm fan
• DFI NF4 Ultra-D R.AD0 0406 Bios (SLI modded)
• 2x 640MB Gainward Bliss 8800GTS Dual DVI with Thermaltake 120x25mm 81cfm 0.33A fan on top
• 2GB OCZ PC4000EB 3-3-2-8 with 120x25mm Delta 75cfm 0.4A fan
• 160GB Seagate 7200.7 SATAII NCQ
• Gigabyte I-RAM with 1.5GB Kingston KHX3200 Winbond BH-5
• Pioneer DVD-RW
• 600W OCZ EvoStream Modular

Power-Mate Peak power draw measurements

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.


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

Jammer

Excellent! Looks like this is the PSU for me. I was waiting for the power draw results on this lil beauty and if it can handle 2x 8800GTS in SLi, it will be plenty for my power requirements.

- Powerful
- Modular
- OCZ quality

Time to go shopping.