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Sapphire Radeon HD 7990 Atomic PCB and Cooler Pictured

By - Source: Expreview | B 13 comments

Photographs of the upcoming Sapphire Radeon 7990 Atomic’s PCB and cooler have surfaced on

The Sapphire Radeon HD 7990 Atomic made its first appearance in June at this year’s Computex conference and features a pair of 28 nm “Tahiti XT2” GPUs, 6 GB of GDDR5 memory and six mini-DisplayPort outputs. Further information on the graphics card’s liquid cooling system and PCB design has now become available on Expreview.

In addition to the aforementioned two GPUs, the HD 7990 Atomic’s PCB features a PLX PLEX8747 PCI-Express 3.0 x48 bridge chip, an enormous 18-phase VRM that draws power from three 8-pin PCI-E power connectors, and provides each GPU with a 6+2+1 phase power supply (Vcc+VDDCI+MVDD).

According to TechPowerUp, the phases appear to have two 50A chokes per phase and driver-MOSFETs, while the ancillary phases use more conventional LFPAK MOSFETs, and most electricals on the 12-layer PCB are handled by Tantalum capacitors. As noted previously, the HD 7990 Atomic features a rather imposing liquid cooling system that includes a full-coverage block, a 120 x 240 mm radiator, a coolant reservoir and pump with coolant ports and a pair of 120 mm fans that spin at 1200 RPM.

The Sapphire Radeon HD 7990 Atomic is expected to be formally announced in a few weeks. At the time of writing, Sapphire hasn’t provided any information on its clock rates, pricing or availability.

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  • 0 Hide
    bucknutty , July 17, 2013 7:03 AM
  • 4 Hide
    06yfz450ridr , July 17, 2013 7:38 AM
    i wonder if they are making a waterblock for their 7970 as well i would like to get a hold of one of those.
  • 4 Hide
    spentshells , July 17, 2013 8:13 AM
    It actually looks like a really good product.
  • -4 Hide
    slomo4sho , July 17, 2013 8:24 AM
    Isn't the 7990 being discontinued later this year?
  • 0 Hide
    vinhn , July 17, 2013 10:16 AM
    Decent, but pretty history now for the 7970. Hearing that the 7990 is discontinuing later this year, rich folks might buy it just for the sake of collections.
  • -6 Hide
    SvRommelvS , July 17, 2013 11:30 AM
    A sealed cooling loop I can see, like the ASUS ARES II, but a 240mm rad and refillable reservoir seems silly.
  • 0 Hide
    RazberyBandit , July 17, 2013 1:06 PM
    Just in time to be EOL'd... AMD kind of flubbed the 7990. They were released nearly a year too late to have a truly significant impact on the market, not to mention serious sales volume.
  • 0 Hide
    jrstriker12 , July 17, 2013 5:03 PM
    Like the cooler but not hot on the card.
  • 0 Hide
    agnickolov , July 17, 2013 9:19 PM
    So with 3x 8pin connectors (150W each) and the 75W from the MB this thing can draw 525W from the PSU...
  • 0 Hide
    lysinger , July 18, 2013 6:22 PM
    I see lights dimming...
  • 0 Hide
    CommentariesAnd More , July 27, 2013 6:48 AM
    This is just what I expected ( although not from Sapphire TBH ) A watercooled HD 7990. I can guarantee this will be THE most cool stock 7990 ever , unless someone copies it.*cough*Samsung*cough* Its nothing innovative ( Innovative was PNY's GTX 580 XLR8 with a water cooled GPU + a CPU block. ) but certainly an interesting move. Lets see how it works out :) 
  • 0 Hide
    sanilmahambre , August 6, 2013 2:20 AM
    would it be better then Ares II