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Thread: Gigabyte GA-EP45-DS3R (rev. 1.0) Constant reboot problem on adjusting Bios settings




  1. #11
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    Default Re: Gigabyte GA-EP45-DS3R (rev. 1.0) Constant reboot problem on adjusting Bios settin

    Quote Originally Posted by Ronski View Post
    Whilst I realise that I am sailing quite close to the maximum that the power supply is rated for I am just within the max. A 4870x2 draws around 300w (25amps), the HX520 can supply around 40amps (480w) across it's 3 12v rails - each a maximum of 18amps, but 40amps combined. Total system draw from the wall socket is 500w (maxed out in Crysis), so allowing for efficiency losses (assuming 85%) the PSU is supplying 425w to the components. This is why I wish graphics card manufactures would state the peak consumption of cards and not a recommended PSU rating, as they have no way of knowing what else is in your system, and quite obviously over rate whats required. Also when the card is in 2d mode only one of the GPU's is being used and thus power draw drops considerably, as I don't game an awful lot the strain on the power supply is usually confined to short periods.
    I agree with the essence of what you are saying. PSU wattage requirements are usually over exagerated. However you forgot one crucial factor in your calculations. Capacitor aging. All capacitors deteriorate, regardless of quality. You're PSU will not be capable of the same wattage it was when brand new. Not sure if this is factored into the wattage rating, eg 5 years of cap aging will still give the 520W of power output.

    You'll most likely be fine for the moment. If you're not looking to get another 4870X2 (waste of time going quad CF imo, get another single 4870 and run 3 way CF) then the HX1000 is over kill. You'd be better off getting the new HX850 or a BFG ES 800. Both will cope with a single 4870X2 with masses of headroom left.
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  2. #12
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    Default Re: Gigabyte GA-EP45-DS3R (rev. 1.0) Constant reboot problem on adjusting Bios settin

    Quote Originally Posted by Psycho101 View Post
    ....You'll most likely be fine for the moment. If you're not looking to get another 4870X2 (waste of time going quad CF imo, get another single 4870 and run 3 way CF) then the HX1000 is over kill. You'd be better off getting the new HX850 or a BFG ES 800. Both will cope with a single 4870X2 with masses of headroom left.
    Thanks for the tips on the power supplies, I'd overlooked the fact that Corsair had brought out the new power supplies recently (much better price than HX1000) - there was a large gap in the HX range before that. Would the HX850 handle 3 way CF as you mention above - don't want to get caught out again and have to upgrade the power supply again, I want something that will last a few upgrades.
    Last edited by Ronski; 06-09-2009 at 05:52 AM.

  3. #13
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    Default Re: Gigabyte GA-EP45-DS3R (rev. 1.0) Constant reboot problem on adjusting Bios settin

    Yes, the HX850 would definitely handle 3 way CF with ease. The TX850 is on AMD's list of official 4 way CF (two X2's), so it should even handle a pair of 4870X2's, though it would be cutting it fine.
    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

  4. #14
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    Default Re: Gigabyte GA-EP45-DS3R (rev. 1.0) Constant reboot problem on adjusting Bios settin

    I have the same problem you have Ronski on the UD5 and i'm actually using a HX1000W so honestly dont think its a PSU issue. Strangely enough 'im also using the ASUS 4870X2 Tri-fan but thats possibly just coincidence.

  5. #15
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    Default Re: Gigabyte GA-EP45-DS3R (rev. 1.0) Constant reboot problem on adjusting Bios settin

    Quote Originally Posted by Tarqy View Post
    I have the same problem you have Ronski on the UD5 and i'm actually using a HX1000W so honestly dont think its a PSU issue. Strangely enough 'im also using the ASUS 4870X2 Tri-fan but thats possibly just coincidence.
    I don't think it's a power supply problem either, but I do need a new power supply as I'm running the PSU very close to max when gaming.

    It's just a coincidence, I only upgraded to the 4870x2 a few weeks ago, and I've had this problem ever since I've had this motherboard, it's so frustrating when overclocking - perhaps I'll have to mod a mains cable and put a switch on my desk!

  6. #16
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    Default Re: Gigabyte GA-EP45-DS3R (rev. 1.0) Constant reboot problem on adjusting Bios settin

    Quote Originally Posted by Ronski View Post
    it's so frustrating when overclocking - perhaps I'll have to mod a mains cable and put a switch on my desk!
    LOL
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    ------------------------------------------------
    Gigabyte Poseidon Chassis
    Gigabyte GA-EP45-DS3 (Rev. 1.0 BIOS v.F9)
    ASUS Artic Square CPU Cooling with AS5
    Thermaltake TR2 RX 550Watt PSU
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    ------------------------------------------------

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