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Radeon HD 5570 Architecture

ATI Radeon HD 5570: Reasonable Gaming Performance For $80?
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In the conclusion of the Radeon HD 5670 review I wrote last month, I mentioned that I hoped the Radeon 5500-series would include a DDR3-based version of the Radeon HD 5670. It looks like it's my lucky day:


Radeon HD 5570Radeon HD 5670
Shader Processors:
400
400
Texture Units:
20
20
Color ROPs:
8
8
Core Clock:
650 MHz
775 MHz
Memory Clock:
900 MHz (DDR3)
1,000 MHz (GDDR5)
Memory Bus:
128-bit
128-bit
Data Rate:
1.8 Gb/s
4 Gb/s
Transistors (Millions):
627
627


Yes, the new Radeon HD 5570 is a DDR3-equippped Radeon HD 5670 with a 125 MHz-lower core clock rate. If you look at the data rate, you can see that the Radeon HD 5570 offers less than half the memory bandwidth of the 5670. This is because DDR3 theoretically delivers half of the bandwidth that GDDR5 memory provides at the same clock speed and on the same memory bus. As a result, we can expect a significant difference in performance between these two closely-related cards.

 Here's a look at the GPU block diagram:

The Radeon HD 5570 GPU, like the Radeon HD 5670, contains five SIMD engines, each with four texture units and 16 stream processors. Of course, each stream processor sports its five ALUs (ATI calls them Stream Cores). As a result, this GPU boasts 400 total stream cores and 20 texture units. Note that there are two 64-bit memory controllers sharing two render back-ends. Each render back-end contains four color ROP units, resulting in a total of the eight specified ROPs and a 128-bit memory interface.

Lets compare this to the Radeon HD 4670, which the 5570 will likely be replacing:


Radeon HD 5570Radeon HD 4670
Shader Processors:
400
320
Texture Units:
20
32
Color ROPs:
8
8
Fabrication process:
40nm
55nm
Core Clock:
650 MHz
750 MHz
Memory Clock:
900 MHz
1000 MHz
Memory Bus:
128-bit
128-bit
Data Rate:
1.8 Gb/s
2 Gb/s
Transistors (Millions):
627
514


At first glance, the 5570 looks impressive because of its shader processor increase. But when we dig a little deeper, we can start to see some chinks in the new card's armor. The older Radeon HD 4670 has a 100 MHz core clock speed advantage over the new 5570, and this almost makes up for the 5570's higher shader core count. The older 4670 also includes more texture units and a higher reference memory clock. Granted, it has been our experience that most of the Radeon HD 4670s in the wild actually come equipped with an 800 MHz clock speed (200 MHz under reference). But, from the reference specifications alone, we expect the Radeon HD 5570 to serve as a somewhat-parallel move from the 4670.

At this point, we're really not surprised. The sub-$100 Radeon HD 5000-series cards are not here to raise the bar with regard to game performance. Instead, they offer roughly similar 3D alacrity at any given price, but with the value-adds inherent to the product family: DirectX 11 support, Eyefinity, bitstreaming Dolby TrueHD and DTS-HD Master Audio, and ATI Stream. This is good news if you were upgrading from integrated graphics, and less so if you're already rocking a Radeon HD 4000-series card.

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Top Comments
  • 28 Hide
    ta152h , February 9, 2010 4:20 AM
    The paper clip is poor as a size reference point, since paper clips are not all the same size. Because of that, it's impossible to know the actual size of the die, since we don't know the size of the paper clip.
  • 26 Hide
    johnbilicki , February 9, 2010 3:29 AM
    xairai thought this would be cheaper, cant wait for fermi to come and reduce amds horrible pricing of the low end lineup, the 5670 shudve had 640 stream processors!!!


    AMD/ATI set the MSRP to $320 for the 5870, blame the retailers for jacking the prices up since nVidia hasn't yet put anything out to compete with.
Other Comments
  • 4 Hide
    megamanx00 , February 9, 2010 3:29 AM
    I would have liked to have seen how this stacks up against the GT240 with GDDR3 as the 5670 already knocked the GT240 with GDDR5 off its perch.
  • 26 Hide
    johnbilicki , February 9, 2010 3:29 AM
    xairai thought this would be cheaper, cant wait for fermi to come and reduce amds horrible pricing of the low end lineup, the 5670 shudve had 640 stream processors!!!


    AMD/ATI set the MSRP to $320 for the 5870, blame the retailers for jacking the prices up since nVidia hasn't yet put anything out to compete with.
  • 0 Hide
    megamanx00 , February 9, 2010 3:31 AM
    Anyway, still a good budget card. I bet this card is made so that AMD can afford to sell it a little less than what even the Radeon 4650 is currently going for, while the 5670 may even fall below the $64 the cheapest 4670s are going for.
  • 0 Hide
    burnley14 , February 9, 2010 3:35 AM
    Disappointing performance increase considering it's supposed to be replacing a card from over a year ago. I would have thought they could have mustered something better.
  • 7 Hide
    skora , February 9, 2010 3:52 AM
    I like it,that power draw had me fall out of my chair. Definitely a HTPC with limited gaming option.
  • -5 Hide
    notty22 , February 9, 2010 3:57 AM
    Well people with a 'old' 9600gt won't be up?grading to this for a 20% loss of performance. Something for everyone I guess.
  • -7 Hide
    acasel , February 9, 2010 4:11 AM
    where is the crossfire mode?
  • 28 Hide
    ta152h , February 9, 2010 4:20 AM
    The paper clip is poor as a size reference point, since paper clips are not all the same size. Because of that, it's impossible to know the actual size of the die, since we don't know the size of the paper clip.
  • 0 Hide
    lunyone , February 9, 2010 4:26 AM
    acaselwhere is the crossfire mode?

    Call it the 5770?? It would be a better option than X-fire, IMHO.

    Personally I'd rather have the 5670 at ~$80 than have the 5570 at that price range. Well the 5670 is what I'd call the HTPC's gaming card choice, IMHO. You get a good GPU that doesn't require extra power and still can play games pretty good!
  • 0 Hide
    liquidsnake718 , February 9, 2010 4:31 AM
    Not something I would ever consider, even for an HTPC... Its seems like a waste of silicon, aluminium, plastic, and metal... might as well get the 5670 or the 9600gt with an hdmi
  • -7 Hide
    knowom , February 9, 2010 4:45 AM
    megamanx00I would have liked to have seen how this stacks up against the GT240 with GDDR3 as the 5670 already knocked the GT240 with GDDR5 off its perch.


    The GT240 wipes the floor with it across the board basically better performance, lower power, and lower noise.
  • 1 Hide
    4745454b , February 9, 2010 4:46 AM
    Quote:
    AMD/ATI set the MSRP to $320 for the 5870


    No, the MSRP of the 5870 was $399. Always has been. The only 58xx card to increase is the 5850, and thats at $300.

    Another so so card. I'd still like to know what AMD did differently to the shaders in the 5xxx cards. They are slower C4C then the shaders in the 4xxx cards. Anand has shown it, but no good explanation as to why. This is a good card for people looking to get in the ring or replace a dead card, but no upgrade for most of us. As a performance minded person, the 9600GT or a used 9800/8800GT is a better deal.
  • -2 Hide
    knowom , February 9, 2010 4:51 AM
    I can't think of a compelling reason anyone would buy this card when you could get a better performing card for the same price point or pay more for a better performing card or pay less for a quieter lower power consumption card.
  • 5 Hide
    vinhcit , February 9, 2010 4:56 AM
    to 4745454b, 5870 was at $379.99 when it first came out.
  • 2 Hide
    rambo117 , February 9, 2010 5:30 AM
    Quote:
    Our Radeon HD 5570 lacks a CrossFire bridge, but AMD let us know that these low-end Radeons will work quite well in CrossFire without the bridge connector; in fact, it's one of those designs able to enable CrossFire operation over the PCI Express bus. The thing is, with 400 shader cores per card, it is difficult to imagine a scenario where dual Radeon HD 5570s would make sense. The Radeon HD 5750 costs less than two Radeon HD 5570s, but sports 800 shader cores and comes with faster GDDR5 memory. This is one of those scenarios where a single board is a better value than two less-expensive derivatives.


    Two things to point out: first, my 3870's in crossfire did fantastic with their measily 320 shader cores and GDDR3 memory

    and second, I don't mean to sound like an ass but the 5750 has 720 shader cores ;) 
  • 5 Hide
    noob2222 , February 9, 2010 5:30 AM
    I would like to just say that one major point of this card was just barely looked at and barely mentioned. Its a LOW PROFILE card designed for a small niche market.

    Quote:
    Last, but certainly not least however, is the area the 5570 excels at: low-profile cards. The low-profile market is basically dominated by bottom-tier cards such as the GeForce 210, Radeon 4350, Radeon 5450, and of course a number of even older cards. The 5570 is faster than every single one of them, usually by a factor of 2-3x. Compared to the 5450 in particular, it fits in the same form factor and offers around 3x the performance for only $25 more. The use of Redwood as opposed to Cedar does mean it consumes more power and generates more heat, but this should be a bearable tradeoff for the significant performance improvement in most low-profile cases.


    This card isn't meant for high or even medium end gaming, its meant for those people who can't fit a normal size card into the pc they bought thats sporting some cheap intel GPU. For those few people this makes a viable option.
  • 1 Hide
    antemon , February 9, 2010 9:29 AM
    citation]noob2222I would like to just say that one major point of this card was just barely looked at and barely mentioned. Its a LOW PROFILE card designed for a small niche market. This card isn't meant for high or even medium end gaming, its meant for those people who can't fit a normal size card into the pc they bought thats sporting some cheap intel GPU. For those few people this makes a viable option.[/citation]
    darn it
    he's right! I'm having a hard time looking for a new case
    and I don't even play anything worth mentioning with my oldish 4770 :( 
  • 2 Hide
    ewood , February 9, 2010 10:19 AM
    megamanx00Anyway, still a good budget card. I bet this card is made so that AMD can afford to sell it a little less than what even the Radeon 4650 is currently going for, while the 5670 may even fall below the $64 the cheapest 4670s are going for.

    yeah and the 5850's msrp is around $250, and they sold for that much at launch. I have been kicking myself for not buying one right off the bat for months now.
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