N1K Posted November 13, 2007 Share Posted November 13, 2007 Hi guys, I made a post here recently, but now need another advice. I still haven't finished my new rig setup and now I have one question. Here are components of my new rig.. MBO ASUS P5E, X38/ICH9R Intel Core 2 Quad Q6600 BOX, (4×2.4GHz, 1066MHz, 8MB, Kentsfield) Corsair 4GB, 2x2GB, 800 MHz DDR2, XMS2-6400 2x128Mx64non-ECC 240 DIMM, unbuffered, 5-5-5-15, 64Mx8 DRAMs,Two matched CM2X2048-6400C5DHX modules, TWIN2X4096-6400C5DHX nVidia XFX GF8800GT/512MB/Dual DVI/PciEx 600M DVD+RW/-RW/RAM LG Dual Layer, SATA, 18x, bulk I will also use two of mine SATA HDD's (320GB and 200GB). I have already bought VX 550w and I was wondering would it hold another PCI-E 8800GT in SLI (since this new 8800GT consumes less power than previous version of the same card). Or...I'll have to try to replace the VX with HX 620W, since I still haven't unpacked the PSU, but no matter, I don't think I could replace it...:[pouts: Link to comment Share on other sites More sharing options...
DerekT Posted November 13, 2007 Share Posted November 13, 2007 The GPU power requirements of the 8800GT's in SLi are 183W (Idle) and 358W (Load In F.E.A.R.) and ~38Amps on the +12V Rail. So that's running it pretty tight, and I would move up to the HX620 (54Amps and 600Watts on the +12V Rail). You don't want to droop when gaming long hours. Nothing is worse than dropping to the desktop after gaming for an hour our two. You should be able to sell the 550 since it is new in box. Link to comment Share on other sites More sharing options...
N1K Posted November 13, 2007 Author Share Posted November 13, 2007 The GPU power requirements of the 8800GT's in SLi are 183W (Idle) and 358W (Load In F.E.A.R.) and ~38Amps on the +12V Rail. So that's running it pretty tight, and I would move up to the HX620 (54Amps and 600Watts on the +12V Rail). You don't want to droop when gaming long hours. Nothing is worse than dropping to the desktop after gaming for an hour our two. You should be able to sell the 550 since it is new in box. Since the price is almost the same should I choose HX620W or TX 750W? Link to comment Share on other sites More sharing options...
Wired Posted November 13, 2007 Share Posted November 13, 2007 HK2, please post your specs in your profile here: http://www.asktheramguy.com/forums/profile.php?do=extra this way it will show up in all of your posts automatically :) Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 13, 2007 Corsair Employees Share Posted November 13, 2007 Since the price is almost the same should I choose HX620W or TX 750W? That would really depend on how many additional components you will add to the machine, your CPU, OCing, etc. Please list your configuration or your proposed configuration in your signature as Wired noted. Link to comment Share on other sites More sharing options...
tc17 Posted November 13, 2007 Share Posted November 13, 2007 Hi guys, I made a post here recently, but now need another advice. I still haven't finished my new rig setup and now I have one question. Here are components of my new rig.. MBO ASUS P5E, X38/ICH9R Intel Core 2 Quad Q6600 BOX, (4×2.4GHz, 1066MHz, 8MB, Kentsfield) Corsair 4GB, 2x2GB, 800 MHz DDR2, XMS2-6400 2x128Mx64non-ECC 240 DIMM, unbuffered, 5-5-5-15, 64Mx8 DRAMs,Two matched CM2X2048-6400C5DHX modules, TWIN2X4096-6400C5DHX nVidia XFX GF8800GT/512MB/Dual DVI/PciEx 600M DVD+RW/-RW/RAM LG Dual Layer, SATA, 18x, bulk I will also use two of mine SATA HDD's (320GB and 200GB). I have already bought VX 550w and I was wondering would it hold another PCI-E 8800GT in SLI (since this new 8800GT consumes less power than previous version of the same card). Or...I'll have to try to replace the VX with HX 620W, since I still haven't unpacked the PSU, but no matter, I don't think I could replace it...:[pouts: Unless Nvidia is lieing to us, I don't see why it wouldn't power it just fine. The EVGA website says the requirements for SLI using the 8800GT are a 450w power supply with 26a on the 12v line. Usually people with higher rated power supply are always going to recommend you dont' have enough to justify the money they spent on theirs. And if it can't run it, then why is the vx550w even rated for SLI? I just placed an order for the power supply myself. I don't plan on running SLI, ever... but won't be happy if there is false advertising on the packaging. Link to comment Share on other sites More sharing options...
Corsair Employees Power Guy Posted November 14, 2007 Corsair Employees Share Posted November 14, 2007 The GPU power requirements of the 8800GT's in SLi are 183W (Idle) and 358W (Load In F.E.A.R.) and ~38Amps on the +12V Rail. Actually, that's total system power consumption. The 8800GT itself only uses about 110-120W of power each at max load. A Q6600 is another 100W or so. The rest of his system will take about another 150W total in a worst-case scenario, so ideally he's really going to use about 370W of power in a worst-case scenario unless he overclocks the heck out of that CPU/Video Card. Since that's about 80% on the +12V rail, you're going to need something with at least 32-35A on the +12V rail, and the VX550 should be perfect. You never want to load the PSU to 100% load because the fan will be spinning up too fast and loud and the components' lifespans will be shortened by running near their capacity. But 3/4 of the max load is fine, and at idle I imagine you'll use only 1/3 of that, or about 10-12A on the +12V. Link to comment Share on other sites More sharing options...
DerekT Posted November 14, 2007 Share Posted November 14, 2007 Since that's about 80% on the +12V rail, you're going to need something with at least 32-35A on the +12V rail, and the VX550 should be perfect. Thanks for the clarification Power Guy . . . Link to comment Share on other sites More sharing options...
N1K Posted November 14, 2007 Author Share Posted November 14, 2007 I posted my PC specs as Wired instructed me to..thx Unfortunately, I can't replace my VX550W with HX620W, even though it's still unpacked. At first I haven't planned to use the SLI, and that's why I've bought vx550w, but what if I'll have some extra money to spend on my other 8800GT card... That's why I had this dilemma now.. I will notice that I don't plan to overclock my CPU or GPU, I will probably only use SLI later on. Since Powerguy made great post with PSU clarification, I'm not in doubt that VX550W will be more than enough for my new system even with SLI on.. I'm only confused with Asus MBO recommendations which are stated at it's box. "Asus recommends 600W PSU and 750W if SLI is used" Link to comment Share on other sites More sharing options...
DerekT Posted November 14, 2007 Share Posted November 14, 2007 Some 600 Watt PSU's would not be enough to run with one 8800GT. It depends on how good the PSU is and the Amps on the +12V rail are very good. I would go with Power Guy's advice as he knows his power. Considering you are not overclocking, I see what he says. He had the knowledge to know that what I had found was total system requirements and not simply the Video Cards system requirements. Clearly he knows his stuff. :) Link to comment Share on other sites More sharing options...
Yellowbeard Posted November 14, 2007 Share Posted November 14, 2007 I'm only confused with Asus MBO recommendations which are stated at it's box. "Asus recommends 600W PSU and 750W if SLI is used"Most likely, they have made a worst case rating takikng into account, mulltiple HDs, PCI cards, etc. As noted, it is about amperage and primarily on the 12v rail. Link to comment Share on other sites More sharing options...
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