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A short, rear-exhaust-ed HD 6950?

Tags:
  • Radeon
  • Cases
  • HD
  • Graphics
Last response: in Graphics & Displays
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July 10, 2011 1:46:53 AM

Hi,

Short version: See thread title.

Long version:

I am cramming a Eyefinity gaming build into a tiny (mATX) case. I am planning on using two HD 6950 2GB graphic cards.

Since the case is tiny, I need to
  • avoid heat build-up inside my case, and
  • make sure the graphic cards actually fits...

    The cards will be seated in a Asus Maximus IV GENE-Z motherboard, residing in a SilverStone SST-SG04B-FH case.

    Initially, I planned on getting the MSI R6950 Twin Frozr III Power Edition because I was impressed by its numbers. However, upon closer inspection, I noticed that
  • it draws air in through the back (and from its surroundings), and
  • it's 270mm long!

    I took some measurements on my case. I have exactly 270mm of space from chassis-back to front-fan.

    I had originally planned to cool my CPU using the CoolIT ECO ALC C240, placing the grill at the air intake in the front. However, installing it reduces the 270mm space to a 247mm space. Seeing the length of this, and other, graphic cards, I realized to my dismay that, without some drastic case modding, I would not fit the CPU cooling plus the graphics cards into the case.

    I can re-obtain the full 270mm without case modding by downgrading my CPU cooling to a CoolIT ECO ALC C120. But I would prefer not to.

    So, my question to you is

  • do you know of any rear-exhaust-ed HD 6950 card, with 2GB RAM, which preferrably has length <247mm, but can have at most length 270mm?

    Thanks,
    Willard.
  • More about : short rear exhaust 6950

    July 10, 2011 2:58:18 AM

    browsingtheworld said:
    No.

    Very funny.

    According to this review, the XFX Radeon HD 6950 HD-695A-CNFC exhausts air through the back, and is 259mm in length.

    Let me rephrase the question to: "If you know of any *insert card criteria here*, please recommend one."
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    July 10, 2011 3:01:56 AM

    willardthor said:
    Very funny.

    According to this review, the XFX Radeon HD 6950 HD-695A-CNFC exhausts air through the back, and is 259mm in length.

    Let me rephrase the question to: "If you know of any *insert card criteria here*, please recommend one."



    That's not a rear exhaust card. It will exhaust "some" air out the rear, but it'll exhaust some into the case too.

    Even the reference 6950 exhaust a little, but that one will exhaust at least half of it's hot air back into the case out the back end.

    I'm not aware of any that are shorter than the reference card that are rear exhaust.

    EDIT: The review you posted is not for the card you linked.
    Share
    July 10, 2011 3:26:43 AM

    Thanks for your reply.

    bystander said:
    That's not a rear exhaust card. It will exhaust "some" air out the rear, but it'll exhaust some into the case too.

    Even the reference 6950 exhaust a little, but that one will exhaust at least half of it's hot air back into the case out the back end.

    Why is it a good design idea to exhaust air back into the case? Is it rather that designing a card which does not is hard/infeasible?

    bystander said:
    I'm not aware of any that are shorter than the reference card that are rear exhaust.

    *sign* seems these bloody things just keep getting longer and longer.

    bystander said:
    EDIT: The review you posted is not for the card you linked.

    The review is comparing the XFX 6950 to the XFX 6970. Only one XFX 6950 card looks like the one in the review. Am I missing something?
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    July 10, 2011 3:50:11 AM

    If this unboxer on YouTube is correct, then the XFX HD-695X-ZNDC should fit my requirements (except for excausting all air out the back, but as bystander mentioned, there is no card which does not).

    He measured the PCB at 9.5''. This is ~242cm. Which is within my desired bounds. The listed length of the card is 259mm, which is less than my fallback bound. So worst-case scenario, I would need to replace my CPU heatsink.

    Now, the XFX HD-695X-CDDC listed length is *even shorter*. This one has 2GB memory. Is this a good card?
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    July 10, 2011 4:09:46 AM

    If that is the dimensions, then it should work. I believe another card that is short is the MSI twin frozr II. I know it's shorter than the reference by a fair bit, but I don't know the exact dimensions.
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    July 10, 2011 11:52:22 AM

    Does the reference card exaust through the back almost exclusively? If so, then I should perhaps hunt for a card which tries to emulates that strategy yet stay short.

    *sigh* how hard can it be to create a sanely-cooled graphics card? For instance, this:



    (full size)

    With the sides, top and bottom completely sealed, there is only a hole in the rear (inside the case) for air intake, and a hole in the front (to outside the case) for air exhaust. Crossflow fans are quiet and efficient, and since the air intake is not on the top, you can put another PCI card right next to the graphics card without inpeding airflow, and you can easily directly channel air from the front of a case to the back of PCI cards. The manufacturers could even add another PCB to the case, along the top, in parallel with the PCB I drew, and let the two PCB share the same massive heat sink. The back of the card is just one big hole; all the connectors can either be put into different PCI card spaces in the case, or pulled out of the case by a cable (what difference does it make whether the cable is mounted to the card or to a cable attached to the card?).

    edit: Where it says "PCI" in the drawing, I meant "PCI case mounting bracket". You know, that metal bar you fasten to the case using a screw, to fasten your card.
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    July 20, 2011 10:33:15 AM

    Best answer selected by willardthor.
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