4 chips in 6 months.

This is the schedule AMD’s GPU engineering teams committed themselves to for the launch of the Evergreen family. The entire family from top to bottom would be launched in a 6 month period.

Last month AMD took the first step of that plan with the launch of Cypress, the forebear of the family and the source of the Radeon HD 5870 and 5850. Today AMD is taking the next step in the launch of the Evergreen family by delivering the 2nd and final Evergreen chip of the year: Juniper. Or as the products based off of them are known as, the Radeon HD 5770 and 5750.

  ATI Radeon HD 5870 ATI Radeon HD 5850 ATI Radeon HD 5770 ATI Radeon HD 5750
ATI Radeon HD 4870
ATI Radeon HD 4850
Stream Processors 1600 1440 800 720 800 800
Texture Units 80 72 40 36 40 40
ROPs 32 32 16 16 16 16
Core Clock 850MHz 725MHz 850MHz 700MHz 750MHz 625MHz
Memory Clock 1.2GHz (4.8GHz data rate) GDDR5 1GHz (4GHz data rate) GDDR5 1.2GHz (4.8GHz data rate) GDDR5 1.15GHz (4.6GHz data rate) GDDR5 900MHz (3600MHz data rate) GDDR5 993MHz (1986MHz data rate) GDDR3
Memory Bus Width 256-bit 256-bit 128-bit 128-bit 256-bit 256-bit
Frame Buffer 1GB 1GB 1GB 1GB / 512MB 1GB 1GB / 512MB
Transistor Count 2.15B 2.15B 1.04B 1.04B 956M 956M
TDP 188W 151W 108W 86W 150W 110W
Manufacturing Process TSMC 40nm TSMC 40nm TSMC 40nm TSMC 40nm TSMC 55nm TSMC 55nm
Price Point $379 $259 $159 $129 / $109 $140-$160 $109-$129

In our 5800 series launch article, we briefly discussed Juniper and the other members of the Evergreen family. With Cypress a bit too big and a bit too expensive to hit mainstream prices, a new chip was introduced in to AMD’s usual 3 chip stack to cover that segment of the market, and that chip was Juniper.

What’s Juniper? In a nutshell, it’s all of Cypress’ features with half the functional units (and no Double Precision for you scientist types). DirectX 11, Eyefinity, angle-independent anisotropic filtering, HDMI bitstreaming, and supersample anti-aliasing are all accounted for. For more information on these features, please see our Radeon 5870 launch article from last month.

With half of the functional units left behind, we’re left with 10 SIMDs, giving us 800 stream processors and 40 texture units, while the ROP count has also been cut in half to 16, in turn giving us a 128-bit memory bus. If Cypress was 2 RV770s put together, then Juniper is the closest thing you’re going to see to RV770 coming out of the Evergreen family.


With the reduction in functional units, Juniper becomes a leaner and meaner core. The transistor count is 1.04 billion, a little less than half of Cypress and about 100 million more than RV770. The die size of this resulting core is 166mm2, significantly less than both Cypress and RV770, the latter due to the smaller process size. RV770 for comparison was 260mm2.

From Juniper we are getting the 5770 and the 5750. The 5770 is a full Juniper, with all of Juniper’s functional units enabled and the card running at what amounts to a full speed of 850MHz (the same as 5850). The 5750 is slightly cut down, much like 5850 is compared to 5870. Here we have 1 SIMD disabled, and the core clock reduced to 700MHz. This is a notable departure from how AMD handled the 4870/4850 split, where 4850 was differentiated using a slightly slower core and much slower RAM, without the need to disable any SIMDs.

The smaller Juniper core also affords these cards lower power usage than the 5800 series. The 5770 is 108W at load and 18W at idle, meanwhile the 5750 is 86W at load and 16W at idle.

As an interesting aside, when AMD started sampling Evergreen cards to game development houses and other 3rd parties, they were Juniper based, and not Cypress based. The Juniper team was rather proud of this, particularly since Juniper came back from TSMC second. They also had less time to get their GPU up and working than the Cypress team did, since they had to wait on Cypress before being able to finish work on some elements. This is what makes AMD’s 6 month rollout all the more impressive, since it means the non-Cypress teams had less time to get their work done than they have in previous product cycles.

Meet The 5770


View All Comments

  • endlesszeal - Tuesday, October 13, 2009 - link

    sorry, if this seems newbest since im still using DVI. anyway, i did a quick peak at apples site and only saw minidp to dvi dongle. however, i jumped over to monoprice and found this:


    would that work?
  • Xajel - Tuesday, October 13, 2009 - link

    Nope this wont work, the card(s) has only two TMDS's for one DVI and one DVI or HDMI, you can't use two DVI's + HDMI...

    if you want to connect the third monitor you have to use Display Port, and adapters won't work since DP on this card doesn't support DVI single Pass through ( this will need a seperated TMDS chip )

    there's some devices that support DVI/HDMI pass throught using DisplayPort, I'm talking about Apple latest Mac's where they dropped DVI/HDMI and replaced it with DP... that one supports DVI/HDMI adapters as it has it's own TMDS chip which is required for DVI/HDMI signals...
  • elfick - Tuesday, October 13, 2009 - link

    Monitors with HDMI seem fairly common and DP-HDMI adapters appear to be cheap. Could you do DP-HDMI, HDMI, and DVI for a triple monitor setup? Reply
  • Ryan Smith - Tuesday, October 13, 2009 - link

    DP-HDMI is still a passive converter, so it still won't work. Reply
  • Ryan Smith - Tuesday, October 13, 2009 - link

    No, it has to be an active (powered) adapter. You can tell if one is active if it has a USB plug, since that's where they're drawing power from. Reply
  • Minion4Hire - Tuesday, October 13, 2009 - link

    It has to be powered if you wish to run dual-link DVI. The single-link MonoPrice adapter will work fine for resolutions up to 1920x1200. But most people looking to run Eyefinity will probably be wanting to go whole-hog with 2560x1600 given the large price tag already associated with such a setup. Reply
  • kzig - Thursday, October 29, 2009 - link

    If I want to run 3 1280 x 1024 monitors together as 3840 x 1024 in Eyefinity, will I need an active adapter, or can I use a cheaper passive one? Reply
  • BladeVenom - Tuesday, October 13, 2009 - link

    The Apple one is poorly rated. Dell has one, but it to is $100. And just to rerepeat that, it has to be an active adapter. http://accessories.us.dell.com/sna/products/Cables...">http://accessories.us.dell.com/sna/prod...us&l... Reply
  • Ryan Smith - Tuesday, October 13, 2009 - link

    I was going to respond to this, but Xajel took the words out of my mouth. Just read his post, it explains why an active adapter is required. Reply
  • bijeshn - Tuesday, October 13, 2009 - link

    Phasing out the 4870 is a bad idea. With time I look forward to the 4870 dropping even lower in price... Reply

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