which video card is better

[kilz]

i got a couple of squadies i am trying to help out. so some fast replys would be greatful. thanks in advance



EVGA 512-P3-N963-TR GeForce 9600 GSO 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card




EVGA 01G-P3-N945-LR GeForce 9400 GT 1GB 128-bit GDDR2 PCI Express 2.0 x16 HDCP Ready Video Card



EVGA 512-P2-N738-LR GeForce 8400 GS 512MB 64-bit GDDR2 PCI Express x16 HDCP Ready Video Card


EVGA 256-P2-N761-TR GeForce 8600 GTS 256MB 128-bit GDDR3 PCI Express x16 HDCP Ready SLI Supported Video


EVGA 512-P3-N866-TR GeForce 9600 GT Superclocked Edition 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card


EVGA 512-P3-N954-TR GeForce 9500 GT 512MB 128-bit GDDR2 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card


EVGA 512-P3-N973-TR GeForce 9800 GT 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card


EVGA 512-P3-N975-AR GeForce 9800 GT 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card


EVGA 512-P3-N940-LR GeForce 9400 GT 512MB 64-bit GDDR2 PCI Express 2.0 x16 HDCP Ready Video Card

[BaldEagl]

EVGA 512-P3-N975-AR GeForce 9800 GT 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card


Got to make sure the PSU will handle it though.

[Denholm]

...Got to make sure the PSU will handle it though.

I'll second that notion. Make sure you have the power to support it, otherwise forget it.

[Zazen13]

Check this link out, it's what I've been using...

http://www.tomshardware.com/charts/gaming-graphics-charts-q3-2008/World-in-Conflict-v1.05,Marque_fbrandx876,791.html


You can modify it to list whatever/however you want the benchmarks to show.

[kilz]

Got to make sure the PSU will handle it though.

and that would be sir? ? ?

i know one has a 500 Watt but not sure what the other one has

[kilz]

after reading some info on newegg.com i saw it is a minimum of 450 watts 

[RTHolmes]

9800 GT are great value at the moment

[1701E]

after reading some info on newegg.com i saw it is a minimum of 450 watts 

and that would be sir? ? ?

i know one has a 500 Watt but not sure what the other one has

500 watt with a 450 minimum is cutting it close, but there is one other thing to check.  The Amperage on the 12Volt rail.  I am unsure of what the 9800GT needs, I think the GTX needed somewhere around 24Amps.  I would guess the GT needs somewhere around 18Amps.

[Zazen13]

500 watt with a 450 minimum is cutting it close, but there is one other thing to check.  The Amperage on the 12Volt rail.  I am unsure of what the 9800GT needs, I think the GTX needed somewhere around 24Amps.  I would guess the GT needs somewhere around 18Amps.

I believe it's 20amps actuallly, but yea, any sub 500w PS would like not have that much on a rail. I just went thru all that for my wife's Dell. I just ended up getting hold of a really spiffy 7600 GS 128 bit that didn't require I upgrade the 300w PS.

[Skuzzy]

Need to allow a minimum of 25% overhead for the rail as well.  If the card needs 20A, then figure 25A.  Startup current is always higher than static draw, but in order for a switching power supply to handle the load without risking damage to itself, there needs to be another 20% added to insure the power supply will meet all the load of the computer.

Which means you need about 30A on the 12V rail from the power supply, to meet a 20A static load.

[BaldEagl]

IIRC Nvidia recommends at least 26 or 28 amps on the 12V rail.  I assume they've taken system requirements and overhead into that recommendation as they only recommend somewhere around 30-35 amps in SLI mode.

[kilz]

ok i will have to ask as i am finding only 25A PSUs. anyone know of a cheep PSU that will put out that many AMPs? ? ?

[BaldEagl]

ok i will have to ask as i am finding only 25A PSUs. anyone know of a cheep PSU that will put out that many AMPs? ? ?

You can add together the amps on multiple 12V rails.  There are plenty that meet the minimum but make sure you also take into account efficiency ratings (i.e. 30 combined amps at 70% only equals 21 useable amps).

[kilz]

You can add together the amps on multiple 12V rails.  There are plenty that meet the minimum but make sure you also take into account efficiency ratings (i.e. 30 combined amps at 70% only equals 21 useable amps).

so a PSU running ,+12V1@19A,+12V2@20A with a Efficiency of 75% should work then right? or wrong?

just thought i might be easyer to let yall see the specs for it and make and model


Model
Brand hec
Model HP585D RETAIL
Spec
Type ATX12V
Maximum Power 585W
Fans 2
Main Connector 20+4Pin
+12V Rails 2
PCI-E Connectors 1 x 6Pin
CrossFire No
SLI No
Modular No
Power Good Signal 100-500ms
Hold-up Time 16.6ms min.
Efficiency > 75%
Over Voltage Protection Yes
Input Voltage 100 - 120 V/ 200 - 240 V
Input Frequency Range 47 - 63 Hz
Input Current 10/5A
Output +3.3V@36A,+5V@36A,+12V1@19A,
+12V2@20A,-12V@1A,+5VSB@2.0A
Approvals UL, cUL, FCC, CSA


hec HP585D RETAIL 585W ATX12V Power Supply

ow and one more question how hard is it to share rails? ? ? ? i have never had to do this before. i always bought a 700Watt with triple rail +12v with 40A at lest thats what i was told to trust as a perm. PSU salute and thanks for all the help so far gents

[Skuzzy]

You can add together the amps on multiple 12V rails.  There are plenty that meet the minimum but make sure you also take into account efficiency ratings (i.e. 30 combined amps at 70% only equals 21 useable amps).

That is not neccesarily true.  Antec, and others, use this as a marketing tool.  The current 750W Trupower from Antec has 4 12V rails all rated at 25A each, yet in the fine print it states, "The total available to all the 12V rails is 62A".