AMD’s Radeon HD 5770 & 5750: DirectX 11 for the Mainstream Crowd
by Ryan Smith on October 13, 2009 12:00 AM EST- Posted in
- GPUs
The Test
For the 5700 series launch, AMD issued some new drivers as the previous 8.66 driver set did not include support for these cards. The driver set we used for these cards is 8.66.6, which is from the same branch as the earlier drivers. In our own testing, we haven’t seen any performance differences between these drivers and the previous ones on the 5800 series cards, but AMD did note that certain configurations might see a small performance boost. As such our results are still using the original 8.66 driver for the 4000 and 5800 series.
Also, as AMD sent us a pair of 5770s, we have tested these cards in a Crossfire configuration. This configuration is largely academic, as 2 5770s is just shy of the price of a 5870 and brings with it all of the limitations of multi-GPU scaling as compared to single-GPU scaling.
On a final note, our 5750 sample is a 1GB card.
| CPU: | Intel Core i7-920 @ 3.33GHz |
| Motherboard: | Intel DX58SO (Intel X58) |
| Chipset Drivers: | Intel 9.1.1.1015 (Intel) |
| Hard Disk: | Intel X25-M SSD (80GB) |
| Memory: | Patriot Viper DDR3-1333 3 x 2GB (7-7-7-20) |
| Video Cards: |
ATI Radeon HD 5870 |
| Video Drivers: |
NVIDIA ForceWare 190.62 |
| OS: | Windows 7 Ultimate 64-bit |
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Anand Lal Shimpi - Tuesday, October 13, 2009 - link
I don't like to make a habit of disagreeing with Ryan, but unfortunately only Cypress based cards support double precision. The 57xx series does *not* support double precision.Take care,
Anand
MadMan007 - Tuesday, October 13, 2009 - link
So where is the double precision implemented? I didn't bother too look it up by I imagine it's buried deep in the shaders. If so why take it out? Is it just disabled or not present at all? If not present I guess I could see removal for the sake of fewer transistors but otherwise it seems like artificial market segmentation. On the other hand hardcore compute power people where time = $$ won't have a problem getting a 5850 or better, or seeing what NV does.CarrellK - Wednesday, October 14, 2009 - link
DPFP (Double Precision Floating Point) is physically not in the Juniper GPU - it is not artificial segmentation. We had to choose between giving you a GPU that would be great for consumer HPC and games at a price you could afford, or something that cost notably more.There are virtually zero consumer applications that need DPFP.
CarrellK
stmok - Tuesday, October 13, 2009 - link
According to ATI's Stream SDK v1.4 page...Desktop cards that support double precision: Radeon HD 3690, 3830, 3850, 3870, 3870 X2, 4770, 4830, 4850, 4850 X2, 4870, 4870 X2, 4890.
Mobile GPUs that support double precision: Mobiliy Radeon 3850
3870, 4850, 4850X2, 4870
None of their IGPs support it.
Their newer Stream SDK 2.0 series (currently in Beta 4), mentions they now support OpenCL in GPU, and that the Radeon HD 5870, 5850, 5770, and 5750 are supported. No mentioned of which can actually do double precision though...
Still, considering the 5770 looks similar in spec to the 4870/4850, it may support it. (The major difference seems to be the Memory Bus Width.)
Come to think of it, what are the requirements to support double precision on a Radeon HD-series GPU?
codedivine - Tuesday, October 13, 2009 - link
Thats sad :( .. thanks for the info!Ryan Smith - Tuesday, October 13, 2009 - link
My understanding is that it's available in the entire Evergreen lineup. So I'm going to give you a tentative "yes".codedivine - Tuesday, October 13, 2009 - link
Thanks!endlesszeal - Tuesday, October 13, 2009 - link
As always from anandtech, great review. However, I almost crapped my pants when I saw the price of a "display port to dvi" dongle," $100?? Hope thats not the average not inflated by Apple price. =)Zingam - Tuesday, October 13, 2009 - link
You don't really need that dongle anyway.Ryan Smith - Tuesday, October 13, 2009 - link
Actually, the Apple adapter is still the only active adapter I'm aware of that's widely available. So yes, that $100 is because of the Apple price.