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psu effect the performance? - Page 2

post #11 of 13
Quote:
Originally Posted by aloosh81 View Post
ok
thank u all guys
i have 2 x msi 8800gt oc sli , q6600 @3.0 stok volts, i ran rdmark lime 10 times and ran prime 95 for 6 hours , and i played cryses high settings, world in conflict very high settings x4 aa,grid demo very high settings ,call of duty,... no problem ,it is just the system is not performing as expected and i thought the psu could be the problem 650W
cooler master but the thing is 8800gt requer 12v @28A and this psu 12@19A,
OK PLAN ENGLISH IS THIS PSU http://www.newegg.com/Product/Produc...82E16817171023 GOOD FOR MY SETUP OR NOT
Oh...in my opinion I would say no it's not what you want as it's 650w...it is less when you put two 12v connectors together...you have two cards...total of 4-pcie connectors...you should have a minimum of 750w...really more still most say always choose an over-rated power supply...it does increase the amount of power actually going to the cards.
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LightningPhoenix
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OCZ Vertex 3 OCZ Vertex 3 Slot load Toshiba TS-TA23 TA23A 6X Blu-ray Burner  Gear Head 24x DVD+/-r Sata Internal Drive 
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Vapochill LS Custom mod'd by Jin Park Custom 3D printed Evaporator Adapter w/RGB stri... Windows 7 HP2408H 24'' LCD  
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post #12 of 13
Quote:
Originally Posted by aloosh81 View Post
ok
thank u all guys
i have 2 x msi 8800gt oc sli , q6600 @3.0 stok volts, i ran rdmark lime 10 times and ran prime 95 for 6 hours , and i played cryses high settings, world in conflict very high settings x4 aa,grid demo very high settings ,call of duty,... no problem ,it is just the system is not performing as expected and i thought the psu could be the problem 650W
cooler master but the thing is 8800gt requer 12v @28A and this psu 12@19A,
OK PLAN ENGLISH IS THIS PSU http://www.newegg.com/Product/Produc...82E16817171023 GOOD FOR MY SETUP OR NOT
I wouldn't worry about your PSU. The higher wattage Acbel built Real Power Pros are good PSUs. They perform well and have acceptable build quality (not the best but good enough). They aren't normally on my recommendation short list because usually you can get better for the same price but I think your psu can handle your system.

If you are getting lower than expected performance, I would suspect driver problems. Have you tried reinstalling drivers and making sure your OS is in good shape with nothing like spyware and a lot of system hungry programs running in the background? Troubleshooting graphics card performance isn't my specialty so these are just general things I would suspect first before I would think about the PSU or any other hardware.

edit- That 19A number is just the max that one 12V rail can put out. Your PSU can provide 540W or 45A total which is acceptable for mid/lower-high end sli.
Edited by shinji2k - 5/30/08 at 8:25am
i7 monsta
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i7 monsta
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post #13 of 13
Quote:
Originally Posted by killa_concept View Post
If a PSU isn't enough to handle a computer you'll certainly know about it... fluctuations in the voltages will cause random crashes, reboots and BSODs... These fluctuations will also prevent higher OCs as the unsteady voltage provided to the CPU will cause instability... personally, if the system is proven stable, clocked up to what you expected it to, and the voltage on the rails seem to be good (tested with a voltmeter - not software readouts) then you should be just dandy
Very well put.
    
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