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HD 4870 x2 on 500W ?

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  • HD 4870 x2 on 500W ?

    Hi guys,I was wondering is it possible to run ATi Radeon HD 4870 x2 on 500 Watt power supply?Cause I was planing on buying that GPU and was wondering will I have to buy new power supply too.

  • #2
    Re: HD 4870 x2 on 500W ?

    Wow,it's been a week since i posted this and no response ... just great

    Comment


    • #3
      Re: HD 4870 x2 on 500W ?

      We were all just lining up to answer your question! Anyway ... a real quick google tells me that ATI recommends a 600watt PSU for that card. You might get away with less but I would not want to risk it on any computer I built. A good quality and high wattage PSU is always a good investment IMO. I do realize that money does not grow on trees (I've looked) but an older/weaker PSU is just asking for trouble and may not have all the connections you need anyway.
      Antec 900 case (4 120mm and 1 200mm lighted fans + UFO flashing light set + 2 12" and 1 6" Mutant Mods meteor lights) - Aerogate ll thermal controller - Asus M2N-e SLI - AMD 64 X2 AM2 6400+ - Corsair TX650 PSU - MSI 450GTS Cyclone OC - 2 X 2GB Patriot Extreme Performance PC2 6400 RAM - SATA 320 GB Seagate HD, SATA 300GB Maxtor HD and IDE 80 GB Samsung HD - Floppy Drive/Card Reader Combo - LG SuperMulti Lightscribe 18x DVD RW - Plextor PX-716A DVD r/rw - Windows 7 Home Premium 64

      Crude but Effective ... it is a way of life.

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      • #4
        Re: HD 4870 x2 on 500W ?

        I was planing on buying Chieftec power supply 650W Turbo Series, Cable management, 4×12V, Active PFC, 14cm fan. Is this good enough?

        Comment


        • #5
          Re: HD 4870 x2 on 500W ?

          I'm not familiar with the brand but (again) a quick google seems to come up with some good reviews. Looks to me like it should do the job nicely but I'm not a pro.
          Antec 900 case (4 120mm and 1 200mm lighted fans + UFO flashing light set + 2 12" and 1 6" Mutant Mods meteor lights) - Aerogate ll thermal controller - Asus M2N-e SLI - AMD 64 X2 AM2 6400+ - Corsair TX650 PSU - MSI 450GTS Cyclone OC - 2 X 2GB Patriot Extreme Performance PC2 6400 RAM - SATA 320 GB Seagate HD, SATA 300GB Maxtor HD and IDE 80 GB Samsung HD - Floppy Drive/Card Reader Combo - LG SuperMulti Lightscribe 18x DVD RW - Plextor PX-716A DVD r/rw - Windows 7 Home Premium 64

          Crude but Effective ... it is a way of life.

          Comment


          • #6
            Re: HD 4870 x2 on 500W ?

            PC Power and Cooling 750W or higher would be a better choice. Don't skimp on your power supply. It is the most important component in your computer.

            Comment


            • #7
              Re: HD 4870 x2 on 500W ?

              Originally posted by SCSIraidGURU View Post
              PC Power and Cooling 750W or higher would be a better choice. Don't skimp on your power supply. It is the most important component in your computer.
              Try to find one atleast in the price range $100 - $140 PC Power and Cooling, Corsair, Antec, OCZ. Find one that is more reasonably priced. And 80+% efficiency, active pfc. for lower heat output. Keeps your room cooler during the summer.

              +1 rep SCSIraidGURU. Its just that whenever i think of PC Power and Cooling I think of their Turbo-Cool series which is almost $200 -500+
              Last edited by R_Hollandtekk; 11-17-2009, 08:54 AM.

              p45 ud3p 1.6 fb stable but fd fails or is it just my ocz incompatibility?!? This guy has problems uniquely similar to mine. I'm starting to think this ocz brand is just not that great. JR P45 driving me crazy!


              MB Rev: ga-ep45-ud3p 1.6 Bios Ver: fd
              Cpu:E8400 Wolfdale 3.0GHz 6MB
              Ram:OCZ Reaper HPC 2x2GB DDR2 1066 Dual Channel Kit
              PSU:Antec EA500
              Chipset: Thermalright HR-05 SLI/IFX
              SB: TT Extreme Spirit II

              Comment


              • #8
                Re: HD 4870 x2 on 500W ?

                I am an electrical engineer. I took one to the electronics lab and pulled the cover off. The MOSFets and power circuitry was impressive. I have used PC Power and Cooling for around 20 years. They are very reliable. I had issues with my 1000W and they paid for shipping overnight both ways to bring it back in house and test it. I have seen the 750W for $99 at Micro Center. You can also pay $40-$60 to custom wire the power supplies to your specifications. You can add/remove connections, length/shorten wires. You can design it for your chassis to remove excess wire and connections to improve airflow.

                OCZ bought PC Power and Cooling. Just make sure you go over the current chart and it will handle your two video cards properly. You also have CPU and hard drives using 12V. PC Power and Cooling are single rail so you do get better 12V current loads.

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                • #9
                  Re: HD 4870 x2 on 500W ?

                  I saw at Legit Reviews - Technology News and Reviews that Palit radeon hd 4870 x2 even overclocked pulls only 411W so why 750W and not 650W ?

                  And also here's the link to see it yourself :
                  PaLiT Revolution 700 HD 4870 X2 Video Card Review - Thermals, Overclocking, and Power Consumption - Legit Reviews

                  Comment


                  • #10
                    Re: HD 4870 x2 on 500W ?

                    It is based on 12V current draw not total watts.

                    4870x2: can use 18-22A @ 12V
                    CPU: 8-11A @ 12V

                    PC Power and Cooling 750W has a single rail
                    +5V @ 30A
                    +12V @ 60A
                    -12V @ 0.8A
                    +3.3V @ 24A
                    +5VSB @ 3A
                    continuous = 750W
                    peak = 825W
                    I have seen them for $99 on sale.

                    The benefit is the power supply will run cooler because you are not drawing close to the current limits of the rails. Never base a power supply on the total wattage. You base it on current draw at maximum load. 4870x2 can peak around 24-26A depending on the 3D game being played. On average they run 18-22A @ 12V.

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                    • #11
                      Re: HD 4870 x2 on 500W ?

                      It would probably work, but why risk it?

                      Clean power is always crucial to a solid system.
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                      Last edited by mxwritingnow; 11-17-2009, 04:26 PM.

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                      • #12
                        Re: HD 4870 x2 on 500W ?

                        Ok guys you convinced me, I'll buy a 750W PSU

                        Thanks for help ! :)

                        Comment


                        • #13
                          Re: HD 4870 x2 on 500W ?

                          Originally posted by marko94 View Post
                          I saw at Legit Reviews - Technology News and Reviews that Palit radeon hd 4870 x2 even overclocked pulls only 411W so why 750W and not 650W ?
                          Because basically watts don't matter but the AMPs the 12v rail/s do.

                          Best to get yourself a 750w or better PSU that only has 1 very beefy 12v rail or multi rails that can supply at least 25AMPs on each rail (the sooner these "virtual rail" PSU's are gone the happier I'll be).

                          Comment


                          • #14
                            Re: HD 4870 x2 on 500W ?

                            As long as the PSU has a single 12V rail and isn't in a virtual rail config then judging using wattage of the 12V rail is perfectly valid. The important figure is Combined Amperage or Wattage on the 12V rail(s) noting that on multi rail units adding up the capabilities of each rail may come to more than the combined figure states is allowed.

                            It's just Ohms Law. a PSU with a single rail capable of supplying 700W max to the 12V rail will always have the same Amperage (58 1/3A, just as a PSU with a single 12V rail and a 58.3A capability will have the same Wattage capacity (700W).

                            It gets confusing when you move to virtual rails. A PSU may be capable of supplying 50A combined on all the 12V rails, and also have the rails rated something like 25A, 30A, 20A. This doesn't mean the manufacturer is being dishonest or is lieing to you, it means that thek know in some cases not all rails will be loaded equally and they allow you to be able to draw more on an individual rail for flexability, as long as combined you don't go over the combined total.

                            This config is not to be confused with some units that have two 12V rails set up like for example the Corsair HX1000. The HX1000 is two 520W PSU's joined into one unit and thus has two independent rails, both capable of outputting half the total Wattage/Amperage.

                            Virtual rails aren't inherantly evil, they are just in some cases harder/more confusing to set up correctly so that you've spread the load of the PC equally over all rails available.
                            Coolermaster CM 690 II advance Case
                            Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
                            P55A-UD4 v2.0 @ F14
                            Core i5 760 @ 20 x 201, 4.02GHz
                            TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
                            2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
                            2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
                            Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
                            Corsair X32 200MB/s Read & 100MB/s Write
                            WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
                            Samsung F3 500GB Backup/Images
                            Noctua 1300RPM 19dB case fan (rear extraction)
                            3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
                            Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

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                            • #15
                              Re: HD 4870 x2 on 500W ?

                              My GTX 295 runs fine on my Ultra 650watt that I bought 2 years ago for $60 bucks..

                              But seems like buying a solid power supply would be a wise decision.
                              Case: Antec P180 ** PSU: Ultra-V 600W
                              Main: EVGA 680i 122-CK-NF68**
                              CPU: E6700 2.66GHz
                              CPU cooling: Arctic Freezer 7 Pro ** RAM: 2GB Corsair XMS2
                              GPU: BFG GTX 295..** Samsung 206bw LCD
                              OS: Vista Ultimate 32bit

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