Please report all spam threads, posts and suspicious members. We receive spam notifications and will take immediate action!
Page 2 of 2 FirstFirst 12
Results 11 to 13 of 13

Thread: GA-P55A-UD4 - PCI-E X8 slot for graphics




  1. #11
    Join Date
    Apr 2009
    Location
    J'Habite En Angleterre
    Posts
    2,431

    Default Re: GA-P55A-UD4 - PCI-E X8 slot for graphics

    No, there are no "issues" with a single card running at 8x. There is no single GPU on the plannet that can saturate an 8x bus, no where near.

    Even running two 480's in crossfire on dual 8x links only encountered very slight performance drops when running spanned resolutions, ie 2 or more 1920x1200 monitors. Same goes for the HD 5800 series, with the only drop noticed being when running 3 monitor eyefinity setups.

    So why does a single GPU have zero issues when running 8x, yet dual 8x crossfire/sli does take a miniscule performance drop? Because information is not only passed card to card by the crossfire/SLI bridge, but also over the PCIe bus, using a small portion of available bandwidth.

    There really is no need to post any proof as to be honest, I don't trust most sites to be able to conduct tests fairly, or to know the difference between natural variation and a true result. However, we can use our own logic to "prove" in a way that 8 lanes for a single GPU is fine. Two words.. "Dual GPU" Graphics Cards. If you truely believe what you may have read, that 8x isn't enough for a single GPU card, then surely 16x isn't enough for a dual GPU card. By that same logic, every single dual GPU card (recent examples include GTX 295, HD4870X2, HD5890) is being cripples by "only" having 16 lanes of bandwidth. This is obviously not true. If it were, then all dual GPU cards would basically be inferior products because of it. They are not. A Dual GPU card on a 16x connection is identical in performance to two single GPU cards in SLI/Crossfire as long as clock speeds are the same. Enthusiasts simply would not tolerate there being any discrepancy and would chose the two single card option every time.

    The only exception to there being no difference between 8x and 16x is when using dual GPU cards. There most certainly is a difference when running a dual GPU card on a 8x connection. Not as much as you'd think, but it's enough to make you not want to run Quad SLI or CrossfireX on a 8x/8x only capable board.

    There will be many others here who could confirm this, but in summary, as a modern single GPU card doesn't even eat 7 lanes of bandwidth, let alone 8x, there is zero difference running 16x or 8x.

    I would be happy to demonstrate this by running a few benchmarks. As you can see from my sig, I can run them with a card pulled for 16x and then with USB/SATA3 kicked up to full.

    Edit: link to the 480 8x/8x vs 16x/16x tests: Introduction - GTX 480 SLI @ 2560x1600 - GTX 480 SLI PCIe Bandwidth Perf. - x16/x16 vs. x8/x8 | [H]ard|OCP
    Last edited by Psycho101; 10-28-2010 at 06:59 AM.
    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

  2. #12
    Join Date
    Aug 2009
    Location
    Birmingham,Great Britain
    Posts
    9,250

    Default Re: GA-P55A-UD4 - PCI-E X8 slot for graphics

    yes thats right,i didnt read through what i posted earlier,so one gpu lets u use full sata3 and usb3 inc turbo but at 8x for gpu ,or 16x if you disable turbo

    crossfire will both be 8x and you can still use sata3 and usb3 but without turbo

    maybe the newer p67 mb's will eliminate all this and be like the ex58's sata3/usb3

    it still wont affect performance
    Last edited by wazza300; 10-28-2010 at 07:39 AM.
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

  3. #13
    Join Date
    Apr 2009
    Location
    J'Habite En Angleterre
    Posts
    2,431

    Default Re: GA-P55A-UD4 - PCI-E X8 slot for graphics

    I hope so too. Doesn't seem fair having to sometimes compromise if you want to run CF/SLI on a mid end solution. It's also a possibility that USB3 and SATA3 will be supported natively by P67. i had heard that initially Intel wanted to use Light-Peek and drop USB3, but I think they've seen reason and changed their minds.

    Yes, the only no no at the moment is Quad SLI or 4-Way Crossfire on a mid range i7/i5/i3, and to be honest, if a person has the money for two 5890's then they're going to be using X58 any way.

    I guess that's the issue with so many enthusiast publications around on the net. it's very easy to read articles and decide you need "x" when really it makes no difference at that person's chosen resolution, is too cost ineffective or worst of all, doesn't provide a tangable benefit, eg making a previously unplayable game (<25-30 FPS) playable.

    Also worth noting and relevant to the OP's questions, is the fact that SATA3 offers virtually zero performance gain when using a mechanical (spinning platter) HDD. The industry is slightly to blame again for touting the old "Faster=Better" slogan. As even a 600GB WD Raptor can't come anywhere near saturating a SATA2 connection, let alone SATA3, the only figures that benefit are Drive Controler to Interface (SATA Port) and Burst rate. This is to be expected of course, as there needs to be radical improvements to disk density and recording techniques before any mechanical mainstream drive will crack 300MB/s (SATA2) let alone SATA3.
    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

Page 2 of 2 FirstFirst 12

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •