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AMD Radeon HD 7770 and 7750 Cape Verde GPU Review

Author: Ryan Shrout
Manufacturer: AMD

Radeon HD 7770 and HD 7750 Reference Cards

Radeon HD 7770 1GB GHz Edition

With an estimated price tag of $159 (variable of course depending on the add-in card vendor), the new Radeon HD 7770 1GB is going to find its way into a lot of budget gamers' PCs.  We got both reference cards and retail cards from MSI and XFX but let's first show you the card and design as it was presented to PC Perspective.

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The continuation of the red/black theme is welcome though as the price of the cards comes down so does the build quality of the heatsink and fan shrouds - such is life.  The PCB is rather short, right on par with other cards in this price range, and thus should be able to fit in most any PC including HTPCs. 

The specifications for this card were listed on the previous page, but in case you missed it:

  • Cape Verde XT
  • 1.5 billion transistors
  • 640 stream processors
  • 1000 MHz clock speed
  • 1GB GDDR5
  • 1125 MHz memory speed
  • $159 MSRP

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The back of the card is bare with no plastic covering or memory to be found.

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AMD continues to have the best display output configurations on its Radeon line of cards and our reference model gives us four total outputs with a dual-link DVI connection, full-size HDMI and a pair of mini-DisplayPort.  The dual slot configuration allows AMD to have an abundance of outputs while still providing a full slot of grill for air ventilation. 

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The HD 7770 just *barely* requires an external power connection of the 6-pin variety with an average gaming power consumption around 80 watts.

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CrossFire is supported but only up to two cards - you won't be able to run three or four of these GPUs together.

Radeon HD 7750 1GB

The Radeon HD 7750 1GB card is going to be priced right around $109 making it a great potential pick up for a HTPC rig that will also do some light gaming.

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Our reference model comes with a single slot cooler that is actually louder than its bigger brother in order to move enough air to keep that 55 watt GPU cool.  Here are the speeds and feeds again for reference:

  • Cape Verde Pro
  • 1.5 billion transistors
  • 512 stream processors
  • 800 MHz clock speed
  • 1GB GDDR5
  • 1125 MHz memory speed
  • $109 MSRP

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The connections had to change with the single slot design and AMD decided to remove the pair of mini-DP connections and replace it with singe full-size DP option.  

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Again, with the HD 7750 you do not require any kind of external power as it falls within the limits of the 75 watts provided by the PCI Express bus.  This feature alone will make this card popular for users with below-grade power supplies and small form factor PCs.

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Another interesting change is the lack of any support for CrossFire on this card - if we look back at the HD 6750 it actually supported 3- and 4-way CrossFire!

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Removing the heatsink on the HD 7750 reveals the Cape Verde GPU hidden beneath.  It is a small thing and I still find it troublesome that AMD refuses to give us a high quality die shot of any of the Southern Islands parts.

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The tiny 123 mm2 die size will help keep costs down for AMD as it attempts to take as much of the mainstream card market as possible before NVIDIA gets around to releasing it Kepler-based parts. 

February 15, 2012 | 04:59 AM - Posted by HyperMinimalism

(OMGWTFBBQQ!!!111!!) What is that?

February 15, 2012 | 06:12 PM - Posted by Jeremy Hellstrom

Making Ryan feel old? Awesome!

February 15, 2012 | 07:42 AM - Posted by Zoyx (not verified)

Nice article... looks like the 7770 will be a nice upgrade for my 5770. One thing I would of liked to of seen is an OpenGL bench. You had the Heaven bench up and running... why not flip on OpenGL and see how it goes?

Or Quake 3 <--- kidding

February 15, 2012 | 11:52 AM - Posted by djotter

There seems to be a whole lot of wasted real estate at the end of the cards, just the power adapter and 2-3cm of open space. You think they would have saved some money trimming that down?

February 16, 2012 | 10:12 AM - Posted by Frank88 (not verified)

Hey guys! Great reviews as usual, but could you use color-coded curves in the graphs (ATI-reeddish, NV-greenish)? My brain keeps getting twisted!

Thanks
Frank

February 17, 2012 | 12:46 AM - Posted by Billgatez (not verified)

So what if AMD has the most adopted GPU. Nvidia still hold the majority with 57.28%. Well AMD has 38.49%.

February 18, 2012 | 06:39 PM - Posted by Anonymous (not verified)

You've probably been told this, but the 7750 doesnt need the crossfire connector to run in crossfire with another 7750.

You can crossfire 5450's even.....

February 18, 2012 | 06:42 PM - Posted by Anonymous (not verified)

Proof:

http://www.techpowerup.com/reviews/HIS/HD_7750_7770_CrossFire/

February 18, 2012 | 06:44 PM - Posted by Anonymous (not verified)

Also, it does limit you to two cards in crossfire I believe.

March 10, 2012 | 09:59 PM - Posted by General Discharge (not verified)

http://www.techpowerup.com/gpuz/dvzfg/ 1175Mhz (Stable Overclock for HD 7770)

March 10, 2012 | 10:04 PM - Posted by General Discharge (not verified)

Sorry GPU clock was idle on that validation link above this one... here it is at 1175MHz GPU Clock and 1450MHz Memory Clock. By the way this is a Sapphire HD 7770 but the card is identical other than the defaults. Enjoy

http://www.techpowerup.com/gpuz/kyrmq/

November 8, 2012 | 08:39 AM - Posted by ChimpDoesDZN (not verified)

Is this setup good enough for gaming?
AMD FX-4170 (Quad-core 4.2 Ghz), and a Nvidia gt450 OR AMD Radeon 7770, 8GB 1333, 500GB HDD

Good enough for high settings?
Which graphics card should i choose?

Thanks :l

November 25, 2012 | 04:21 AM - Posted by daschimp (not verified)

My radeon HD 7750 has 4GB instead of 1GB,, any noticable difference?

April 28, 2013 | 04:43 AM - Posted by iran (not verified)

you can play more games in one time with 4GB Gddr5

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