AMD ATI Radeon HD 5770 and 5750 DirectX 11 GPUs
DX11 gaming on the cheap?
Review AMD's Radeon HD 5770 and 5750 are the mid-range members of the new HD 5000 DirectX 11 graphics chip family. They're fabbed using a 40nm process, just like their bigger brothers.
Sapphire's HD 5770: reference Radeon HD 5770 design
But the number of transistors in these mid-range chips - codenamed 'Juniper' - has been reduced by just over a half, from the 2.15bn in the 58x0 design, codenamed 'Cypress', to 1.04bn. The area of the chip has also been quartered, from 334mm² to 166mm².
Armed with that information, you won’t be surprised to learn that the number of unified shaders in 5770 has been halved too. Which is to say that the 5870 has 1600 shaders and the 5770 has 800. The 5750 has 720.
When it comes to clock speeds, the 5770 has the same 850MHz core speed as 5870 while the 5750 runs at 700MHz, which is slightly slower than the 5850's 725MHz frequency. The specification of the memory breaks with tradition as the junior 5750 and 5770 use 1GB of GDDR 5 just like the grown-up 5850 and 5870. In the past, we've been accustomed to mid-range chips that use slower memory than their high-end siblings do. The high-end chips use a 256-bit memory controller while the new mid-rangers settle for a 128-bit controller.
It's a safe bet that AMD has chosen these shader counts and clock speeds to ensure there is a clear distinction between each member of the HD 5000 family and it also results in a neat cascade of prices.
Radeon HD 5750: cool runner
The 5870 sells for £299 or you can buy the 5850 at a more reasonable £199 and still get masses of DirectX 11 performance. The 5770 slips in at £132 and the 5750 costs £110. The prices put the new DX11 chips head-to-head with Nvidia’s DirectX 10 GeForce GTX 260, which typically sells for £125-160.
ATI cards "struggling" with HD channels in Windows 7
Nice article by PC Pro
Its good to get bad press...
Ive also read that other 5xxx cards blue screen coming out of hibernation in Windows 7... ATI - Sort it out!
no clear card for "gamers on a modest budgets?" that'll be the recession and, correct, not wishing to give Nv a leg to stand on. in this downturn they need clear pricing and clear products. the low and medium products have to be significantly inferior feature wise to make the premium stand out.
all they gotta do is sort their drivers out now! something ATI were berated for yonks ago! AMD do not want this label of "bad drivers"!!!
Not touching until they fix the driver issues
Thanks for the links on driver issues above, it has been sadly informative. If you believe the ATI forums (obviously the number of unhappy users will be high, as happy users don't tend to post) the driver stability has some way to go, especially under Windows 7.
Perhaps in a couple of months.
A 5770 Crossfire will also convert a lot more electricity into noise and is prone to the microstuttering effect. Both is rather undesirable. Additionally the 58XX have better overclocking capabilities.
Interesting to see 2x5770 easily outperforming 5850, and occasionally the 5870 as well, considering 2x5770 costs only 15% more than a 5850, and almost 30% less than a 5870. If you've got the room to spare...
Roll on 5770 X2?