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#1 2009-09-24 10:40 pm
- Bat
- Flawless Cowboy
- Royal Wombat

- From: Björk, Björk
- Registered: 2001-05-14
- Posts: 28541
AT's HD 5870 Review
Sometimes a surprise is nice. Other times it’s nice for things to go as planned for once.
Compared to the HD 4800 series launch, AMD’s launch of the HD 5800 series today is going to fall into the latter category. There are no last-minute announcements or pricing games, or NDAs that get rolled back unexpectedly. Today’s launch is about as normal as a new GPU launch can get.
However with the lack of last-minute surprises, it becomes harder to keep things under wraps. When details of a product launch are announced well ahead of time, inevitably someone on the inside can’t help but leak the details of what’s going on. The result is that what we have to discuss today isn’t going to come as a great surprise for some of you.
As early as a week ago the top thread on our video forums had the complete and correct specifications for the HD 5800 series. So if you’ve been peaking at what’s coming down the pipe (naughty naughty) then much of this is going to be a confirmation of what you already know.
Today’s Launch
3 months ago AMD announced the Evergreen family of GPUs, AMD’s new line of DirectX11 based GPUs. 2 weeks ago we got our first briefing on the members of the Evergreen family, and AMD publically announced their Eyefinity technology running on the then-unnamed Radeon HD 5870. Today finally marks the start of the Evergreen launch, with cards based on the first chip, codename Cypress, being released. Out of Cypress comes two cards: The Radeon HD 5870, and the Radeon HD 5850.
So what’s Cypress in a nutshell? It’s a RV790 (Radeon HD 4890) with virtually everything doubled, given the additional hardware needed to meet the DirectX 11 specifications, with new features such as Eyefinity and angle independent anisotropic filtering packed in, lower idle power usage, and fabricated on TSMC’s 40nm process. Beyond that Cypress is a direct evolution/refinement of the RV7xx, and closely resembles its ancestor in design and internal workings.
... 
Only 27 pages.
Last edited by Bat (2009-09-24 10:41 pm)
If all economists were laid end to end, they would not reach a conclusion - George Bernard Shaw
"Fire up a colortini, sit back, relax, and watch the pictures, now, as they fly through the air."
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#2 2009-09-24 11:04 pm
- sturner
- Royal High Poobah
- Moderator

- From: Carrollton, TX USA
- Registered: 2000-01-31
- Posts: 13768
Re: AT's HD 5870 Review
Do you think I could slap this in my Mac Pro and use it in Boot Camp? I hope so.
I'm not dead yet.
There are 3 types of people, those who can count and those who can't.
"There are few things graven in stone, excepting your date of death."
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#4 2009-09-25 2:41 am
- NightCougar_37
- For Gallia!!

- From: The back of my Twilight Drake
- Registered: 2001-07-22
- Posts: 9140
Re: AT's HD 5870 Review
No fair...now theres another thing to consider upgrading. Should have taken that 2nd 8800GTS for SLI. Would be less tempted now I bet.
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#5 2009-09-25 3:29 am
- Bat
- Flawless Cowboy
- Royal Wombat

- From: Björk, Björk
- Registered: 2001-05-14
- Posts: 28541
Re: AT's HD 5870 Review
sturner wrote:
Do you think I could slap this in my Mac Pro and use it in Boot Camp? I hope so.
Not sure, tho if were Boot Camp only, I'd guess yes. Mayhap Barefeats will attempt it in the near future.
~Coxy wrote:
ATi's "Eyefinity^6" has 6x Mini-DisplayPort outlets, so that part looks promising.
Current cards don't, but the review mentions a 6xMini-DP version coming in future. I'd not be surprised to see this in a future MP, esp. since AMD has reduced the power draw at idle to only 27 watts.
NightCougar_37 wrote:
No fair...now theres another thing to consider upgrading. Should have taken that 2nd 8800GTS for SLI. Would be less tempted now I bet.
Hence the grin/wail. Tho really, I have about all the card I can really leverage on my old platform.
The compy hardware isn't so young either.
I should check again on mismatched cards in Crossfire, for *koff* reference.
If all economists were laid end to end, they would not reach a conclusion - George Bernard Shaw
"Fire up a colortini, sit back, relax, and watch the pictures, now, as they fly through the air."
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#6 2009-09-25 4:23 am
- Bat
- Flawless Cowboy
- Royal Wombat

- From: Björk, Björk
- Registered: 2001-05-14
- Posts: 28541
Re: AT's HD 5870 Review
OMGOMGOMG... not just angle-independent anisotropic filtering, but
The Return of Supersample AA
Over the years, the methods used to implement anti-aliasing on video cards have bounced back and forth. The earliest generation of cards such as the 3Dfx Voodoo 4/5 and ATI and NVIDIA’s DirectX 7 parts implemented supersampling, which involved rendering a scene at a higher resolution and scaling it down for display. Using supersampling did a great job of removing aliasing while also slightly improving the overall quality of the image due to the fact that it was sampled at a higher resolution.
..
Lately we have seen a slow bounce back in the other direction, as MSAA’s imperfections became more noticeable and in need of correction. Here supersampling saw a limited reintroduction, with AMD and NVIDIA using it on certain parts of a frame as part of their Adaptive Anti-Aliasing(AAA) and Supersample Transparency Anti-Aliasing(SSTr) schemes respectively. Here SSAA would be used to smooth out semi-transparent textures, where the textures themselves were the aliasing artifact and MSAA could not work on them since they were not a polygon. This still didn’t completely resolve MSAA’s shortcomings compared to SSAA, but it solved the transparent texture problem. With these technologies the difference between MSAA and SSAA were reduced to MSAA being unable to anti-alias shader output, and MSAA not having the advantages of sampling textures at a higher resolution.
With the 5800 series, things have finally come full circle for AMD. Based upon their SSAA implementation for Adaptive Anti-Aliasing, they have re-implemented SSAA as a full screen anti-aliasing mode. Now gamers can once again access the higher quality anti-aliasing offered by a pure SSAA mode, instead of being limited to the best of what MSAA + AAA could do.
Ultimately the inclusion of this feature on the 5870 comes down to two matters: the card has lots and lots of processing power to throw around, and shader aliasing was the last obstacle that MSAA + AAA could not solve. With the reintroduction of SSAA, AMD is not dropping or downplaying their existing MSAA modes; rather it’s offered as another option, particularly one geared towards use on older games.
“Older games” is an important keyword here, as there is a catch to AMD’s SSAA implementation: It only works under OpenGL and DirectX9. As we found out in our testing and after much head-scratching, it does not work on DX10 or DX11 games. Attempting to utilize it there will result in the game switching to MSAA.
With DX9 backwards-compatible to at least DX7 and many DX6 & -5 games still able to run well under it, it's an image-quality freak's dream come true. The Voodoos couldn't even do aniso, let 'lone angle-independent, and even trilinear was a perf hit it could ill afford at 4x FSAA. All that and 10 bit/channel color.
The 'one box fits all' approach comes even closer. *sniff*
I must $ave.
If all economists were laid end to end, they would not reach a conclusion - George Bernard Shaw
"Fire up a colortini, sit back, relax, and watch the pictures, now, as they fly through the air."
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#7 2009-09-25 9:45 am
- macnuke
- just a plano guy
- Moderator

- From: North Dallas 40
- Registered: 2004-05-16
- Posts: 7132
Re: AT's HD 5870 Review
ok so there's the card to build my new box around.
dam this is gunna cost me.
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