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ATI Radeon HD 5750 & 5770 reviews now LIVE!
- Thread starter Tejstar
- Start date
I'm going to be getting a 5770 for my HTPC.
With just 18watts Idle, and capable of gaming almost as well as my 4870 it's a surefire winner. Add to this the inclusion of a protected audio pathway and my HTPC will be given the upgrade it's been screaming for.
amen to that
I have to say I think ATI missed a trick here,I was thinking the 5770 would be my next card but I was expecting it to be at least on par with a 4870. As it is its mostly slower by 5-10% but at the same price point. I don't get why ATI have done this, it leave the 4890 in the middle of the 5850 and the 5770 but with the older feature set ? I don't get why they didnt place these cards in performance between the 4870 and 4890 for the 5770 and put the 5750 between the 4870 and the 4850. That would have been enough to make people disregard the older series and jump on board the DX11 train.
Most likely to keep power consumption down and make them viable for HTPCs. This is an expanding market after all, I am sure a lot of people will buy these for that purpose.
Plus the 5870 will drop in price sometime soon and then fill that niche.
It certainly does seem like ATI got the bandwidth figures wrong for the 5*** series. The is 5770 is a 4890 on 40nm yet it's much slower, due to the 128bit bus, which would also imply that the 256bit bus for the 5870 is also too small. We might see a 192bit/384bit refesh sometime next year.
Still not a bad card. Good features and cool and quiet.
Still not a bad card. Good features and cool and quiet.
ahhhhhhhhh THIS IS GREAT! cheap dx11 cards 
i think ill wait till they drop a few pounds then ill buy 2 together . I think id rather these in crossfire than 2 9800GTS DUH.
I think ati have done a good job. Making cheap DX11 cards opens the market for budget gamers to experience DX11. Like myself. Thats made me jump from nvidia to ati now.
i think ill wait till they drop a few pounds then ill buy 2 together . I think id rather these in crossfire than 2 9800GTS DUH.I think ati have done a good job. Making cheap DX11 cards opens the market for budget gamers to experience DX11. Like myself. Thats made me jump from nvidia to ati now.
Caporegime
- Joined
- 18 Oct 2002
- Posts
- 33,188
you maths skills aren't good, bandwidth doesn't really need to scale with the raw power of the card at all. you need enough memory to cover all textures, with AA/AF which increases memory usage, and you need enough bandwidth to cover the movement of those textures, once you have enough, its enough, more won't hurt you.
The very fact the 5770 is so close to the 4870, with a lot less bandwidth, LOTS less, is because the 48XX series was all rop limited. The reason the 5870/50 is not quite as fast as needed, is its rop limited.
Overclocked 5870's just on the memory offers almost no increase, 2% faster with a 10-15% memory overclock, while overclock the core 10%, you get an 8% faster card overall. Its limited by something to do with core clocks, then when you have an equally clocked 5850 performing identically to a 5870, you realise, its not shader limited either, which leaves you with, the ROP's.
If the 5850 had 24/28 rops rather than the 32, it would have been 10-20% slower than the 5870, at the same clocks.
But its all about balance, its pretty close on all accounts, you'll always be limited somewhere to some degree, there isn't infinate playability in designing a core.
Fact is that AMD won't be making the 4870/90 much longer at all, its a great card, it sells for the same price as those cards now, well a little cheaper, but offers more profit from a much smaller core than those cards, and a far cheaper pcb/circuitry from the reduced bus.
5770's can be picked up for around £115 atm on some places.
When you take into account that most people might get £35-£50 for their current card, better than 5870 performance, with 2x5770's, for less than £200 seems like a bargain.
When you take into account that most people might get £35-£50 for their current card, better than 5870 performance, with 2x5770's, for less than £200 seems like a bargain.
Associate
- Joined
- 15 Nov 2004
- Posts
- 1,745
- Location
- London
I completely agree, I think when these go sub £100 though they make a great low power consumption CF setup.
but what happens if you want to play DX11 games? i will sacrifice a small disadvantage in performance/power consumption to play dx11 games. If a card can play all dx10 dx11 games on reasonably high settings its a good card. If it can only play dx10 i see no point
( my opinion )I didn't use maths, it's just looks like an obvious conclusion.
Now for a little math to back it up
4890/5770 have the same ROP/SP/Texture units/Core clock/Memory. The only major difference is that the 4890 has ~60% more bandwidth. In many benchmarks the 4890 is ~30-40% faster than the 5770 which would suggest that it's bandwidth starved.