First of all, I have been using this particular power supply for a couple years now. http://www.newegg.com/Product/Product.aspx?Item=N82E16817182067&Tpk=rx750-s-b
It's 750W, 80+ certified, it has 4 20A 12V rails, but a combined full load rating of 60A across all the rails.
1) On each of the four 6-pin PCIe connectors, it has labels. Two of them are +12V1, the other two +12V2, so both of those rails seem to be dedicated exlusively to video card power, right?
2) Since I've had my GTX460 (I also did this on my GTX465) I've plugged one each of 12V1 and 12V2 connectors into the card. My logic may be flawed, but I assumed that this would be a more evenly distributed load on the power supply. Am I correct here or does this really matter?
3) The biggest thing I wonder here though is how exactly are the other 2 12V rails distributed? How much of this power is going to the CPU? Is it just a single 12V rail for exclusive CPU power kinda like the PCIe power?
It's likely that I will be making at least a GPU upgrade before this year is out, and maybe CPU too. Not quite sure on the latter. This PSU is still running very well but I'm starting to wonder if I want to carry this unit over when/if I make a big upgrade or platform change later this year. I would also like to have a better understanding of power distribution from multi-rail supplies in general.
Edited by metal_gunjee - 8/6/12 at 10:16am
It's 750W, 80+ certified, it has 4 20A 12V rails, but a combined full load rating of 60A across all the rails.
1) On each of the four 6-pin PCIe connectors, it has labels. Two of them are +12V1, the other two +12V2, so both of those rails seem to be dedicated exlusively to video card power, right?
2) Since I've had my GTX460 (I also did this on my GTX465) I've plugged one each of 12V1 and 12V2 connectors into the card. My logic may be flawed, but I assumed that this would be a more evenly distributed load on the power supply. Am I correct here or does this really matter?
3) The biggest thing I wonder here though is how exactly are the other 2 12V rails distributed? How much of this power is going to the CPU? Is it just a single 12V rail for exclusive CPU power kinda like the PCIe power?
It's likely that I will be making at least a GPU upgrade before this year is out, and maybe CPU too. Not quite sure on the latter. This PSU is still running very well but I'm starting to wonder if I want to carry this unit over when/if I make a big upgrade or platform change later this year. I would also like to have a better understanding of power distribution from multi-rail supplies in general.
Edited by metal_gunjee - 8/6/12 at 10:16am
Lounge Machine
(16 items) |
Doc Wallace
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Bowser
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| CPU | Motherboard | Graphics | RAM |
|---|---|---|---|
| Phenom II X4 955 @ 3.80 GHz | ASRock 770iCafe AM3+ | Asus Radeon HD 4850 1GB | 4GB AData XPG DDR3-1600 |
| Hard Drive | Optical Drive | Cooling | OS |
| WD Caviar Blue 640GB | Lite-On DVDRW | Corsair H50 | Windows 7 Pro x64 |
| OS | OS | Monitor | Power |
| Linux Mint 14 KDE | OS X Mountain Lion 10.8.2 | Asus VH236H | Corsair CX430 |
| Case | Mouse | ||
| Diablotek EVO RPA-6170 | Logitech LX3 | ||
| View all | |||
| CPU | Motherboard | Graphics | RAM |
|---|---|---|---|
| Opteron 1218 HE @ 3.25 GHz | Asus M3N72-D | EVGA Geforce GTS 250 512MB | 4x1GB AData / OCZ DDR2 @ 801 MHz |
| Hard Drive | Optical Drive | Cooling | OS |
| Hitachi 160GB 2.5" | HL-DT-ST DVD/CDRW combo drive | Zalman CNPS9500AT | Windows XP Pro x64 |
| Monitor | Power | Case | Mouse |
| Compaq S1922a | Chiefmax 650W | Raidmax Smilidon EB | Logitech LX3 |
| View all | |||
|
Lounge Machine
(16 items) |
Doc Wallace
(15 items) |
Bowser
(14 items) |
| CPU | Motherboard | Graphics | RAM |
|---|---|---|---|
| Phenom II X4 955 @ 3.80 GHz | ASRock 770iCafe AM3+ | Asus Radeon HD 4850 1GB | 4GB AData XPG DDR3-1600 |
| Hard Drive | Optical Drive | Cooling | OS |
| WD Caviar Blue 640GB | Lite-On DVDRW | Corsair H50 | Windows 7 Pro x64 |
| OS | OS | Monitor | Power |
| Linux Mint 14 KDE | OS X Mountain Lion 10.8.2 | Asus VH236H | Corsair CX430 |
| Case | Mouse | ||
| Diablotek EVO RPA-6170 | Logitech LX3 | ||
| View all | |||
| CPU | Motherboard | Graphics | RAM |
|---|---|---|---|
| Opteron 1218 HE @ 3.25 GHz | Asus M3N72-D | EVGA Geforce GTS 250 512MB | 4x1GB AData / OCZ DDR2 @ 801 MHz |
| Hard Drive | Optical Drive | Cooling | OS |
| Hitachi 160GB 2.5" | HL-DT-ST DVD/CDRW combo drive | Zalman CNPS9500AT | Windows XP Pro x64 |
| Monitor | Power | Case | Mouse |
| Compaq S1922a | Chiefmax 650W | Raidmax Smilidon EB | Logitech LX3 |
| View all | |||
