Sapphire HD7770 1GHZ Overclock Edition Review

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Today AMD release their new HD7750 and HD7770 series graphics cards targeting the mainstream enthusiast audience. In this review we analyse the Sapphire HD7770 1GHZ Overclock Edition which is supplied resplendent with custom cooling solution.

Sapphire are AMD’s largest partner and over the last year they have been releasing some of the finest graphics cards known to man.

Their HD7950 Overclock Edition was one of the quietest performance cards we have tested to date, and could scale to over 1,200mhz.

In this state it was faster and quieter than the reference clocked HD7970 which cost £100 more.

Unlike VTX3D, Sapphire have taken the reference AMD cooler, ditched it and created their own. They are using a centralised, oversized fan on a blue PCB.

Product Sapphire HD7770 1GHZ OC Edition AMD HD7770 1GHZ
Process 28nm 28nm
Transistors
1.5 billion
1.5 billion
Engine Clock
1,150 mhz
1000mhz
Stream Processors
640
640
Compute Performance 1.28 TFLOPS 1.28 TFLOPS
Texture Units 40 40
Texture Filrate 40.0 GT/s 40.0 GT/s
ROPs 16 16
Pixel Filrate 16.0 GP/s 16.0 GP/s
Z/Stencil 64 64
Memory Type 1GB GDDR5 1GB GDDR5
Memory Clock 1,250mhz 1,125mhz
Memory Data Rate 5.0 Gbps 4.5 Gbps
Memory Bandwidth 72 GB/s 72 GB/s

Sapphire have overclocked the core from 1GHZ to 1,150mhz, and the memory from 1,125mhz (4.5Gbps effective) to 1,250mhz (5.0Gbps effective). Is this the best card on launch day?

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Rating: 5.0/5 (1 vote cast)
Sapphire HD7770 1GHZ Overclock Edition Review, 5.0 out of 5 based on 1 rating
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12 Comments
  • AMD lanza Radeon HD 7770 y Radeon HD 7750 (Cape Verde). ¡GCN a precio asequible! | MadBoxpc.com
    February 15, 2012
    #1
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    [...] Radeon HD 7770 & HD 7750 @ Hothardware AMD Radeon HD 7770 & HD 7750 @ Motherboards (XFX) AMD Radeon HD 7770 & HD 7750 @ KitGuru (Sapphire OC) AMD Radeon HD 7770 & HD 7750 @ [...]

  • Raymond
    February 15, 2012
    #2
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    Good card, but I cant help but feel this range of cards from AMD is rather dull and lifeless. why remove alot of the shaders on the cards? makes no sense to go back a step. negates the gains from the manufacturing process and increasing the clock speeds

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  • Ch3if
    February 15, 2012
    #3
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    Very dull launch day, they need to drop the prices.

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  • Fank
    February 15, 2012
    #4
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    Sapphire always do good coolers, but id love to know who in AMD thought it was a good idea to lose 140 stream processors on the new card? the HD6770 had 800 !

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  • Samuel
    February 15, 2012
    #5
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    Crossfire performance is really good. id like to see results from two of the OC’d models.

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  • Mark
    February 15, 2012
    #6
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    great cooler, but the card undeneath hasn’t hit the spot im afraid.

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  • oZeros » AMD lanza las HD 7770 y HD 7750
    February 15, 2012
    #7
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    [...] techpowerup anandtech guru3d Legitreviews techreport tomshardware hothardware hardocp kitguru [...]

  • Muppett
    February 15, 2012
    #8
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    I can’t see anybody in the UK listing a Sapphire SKU with 1150Mhz Core clock…
    see Scan/Dabs have a 1120 listed…

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  • Zardon
    February 15, 2012
    #9
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    Hi Muppett, you aren’t the first person to ask me about this, and ive contacted Sapphire today and they told me that SCAN have the core clock speed listed at the older speeds. It should be 1150mhz. you will hopefully see this change on SCAN Shortly.

    Thanks for letting us know.

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  • The News: Radeon HD 7770 Edition | MEGATechNews
    February 16, 2012
    #10
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    [...] HD 7770 OC edition reviewtechPowerUp – AMD Radeon HD 7770 GHz Edition 1 GBKitGuru – Sapphire HD7770 1GHZ Overclock Edition Review, VTX3D HD7770 1GHZ Edition Crossfire Review, HIS HD7750 iCooler Graphics Card ReviewHardware [...]

  • veer
    April 25, 2012
    #11
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    See this for more information http://www.futurehardware.com/latest-tech-news/737.htm

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  • Meh
    May 16, 2012
    #12
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    This card works best underclocked if you have a clocked version, some of the overclocked 7770′s have an odd issue that causes your screen to flicker. Performance wise its a good mid/entry range card but a complete failure from the 6000 series. One thing does stand out about the 7000 series though, their using better cooling which would be a nice addage if only the prices would drop.

    @Frank I would guess it has to do with the dye shrinkage from 40nm scale to 28nm, I would have settled for a thousand stream processors if it meant abandoning such a useless shrinkage. My guess they shrunk the dye in order to control heat and leverage power out put. Which is just piss poor marketing strategy if you ask me.

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