Aces High Bulletin Board
General Forums => Hardware and Software => Topic started by: kilz on March 22, 2009, 04:14:08 PM
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i got a couple of squadies i am trying to help out. so some fast replys would be greatful. thanks in advance :salute
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
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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.
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...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.
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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 (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.
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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
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after reading some info on newegg.com i saw it is a minimum of 450 watts :rock
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9800 GT are great value at the moment :aok
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after reading some info on newegg.com i saw it is a minimum of 450 watts :rock
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.
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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.
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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.
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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.
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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? ? ?
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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).
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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
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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".
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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
That should work but it's going to be close.
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75% efficiency? That supply is going to crank out some heat and cost you more than a more efficient supply would.
Let me show you what I mean by using some arbitrary numbers.
If the load on the supply is 300W.
At 75% efficiency the supply use 375W from the wall.
At 82% efficient will use 354W from the wall.
The extra power the lower efficiency power supply uses is converted to heat, thus heating up your environment more.
Just FYI.
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ok how about this PSU then
Model
Brand CORSAIR
Model CMPSU-750TX
Spec
Type ATX12V / EPS12V
Maximum Power 750W
Fans Thermally controlled 140mm fan
PFC Active
Main Connector 20+4Pin
+12V Rails Single
PCI-E Connectors 4 x 6+2Pin
SLI Ready
CrossFire Ready
Efficiency > 80%
Energy-Efficient 80 PLUS Certified
Input Voltage 100 - 240 V
Input Frequency Range 50/60 Hz
Input Current 10A
Output +3.3V@30A,+5V@28A,+12V@60A,
-12V@0.8A,+5VSB@3.0A
MTBF >100,000 Hours
Approvals UL, CE, CB, TUV, FCC, CCC
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I'm not a fan of Corsair power sups. At that point you would be better with the 610
PC Power & Cooling / Silencer / 610-Watt / PCI-Express / SATA-Ready / Copper Power Supply, 80Plus - 85
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IIRC, Corsair's are made by Seasonic. They're excellent quality PSU's.
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thank you all for your help salute
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Much much better choice. Always try to find 80+ certified.
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now no one did tell me how to use both rails. my squadie cant afford a diffrent PSU so he is going to try to use the one he ordered. is that a wire harness or what? ? ?
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now no one did tell me how to use both rails. my squadie cant afford a diffrent PSU so he is going to try to use the one he ordered. is that a wire harness or what? ? ?
As long as the PSU has a PCIe connector you don't have to do anything except plug it in.