Saturday, August 9th 2008

R700 Crossfire X Scaling Efficiency up to 104 %

Chinese hardware website ChipHell put up preliminary comparisons between the Radeon HD 4870 X2 and a Crossfire X setup using two of these cards to compare the scaling efficiency of these cards when paired in a Crossfire X setup. Readings were put up on a chart. The cards seem to scale up to 104% and in several tests the performance scaling stayed above 50%. The average performance increment a pair of these cards has over a single card is noted to be 66%, on launch drivers. It is general belief that entry-level and mid-range cards scale more efficiently than high-end cards. Scaling efficiency for these cards are high even with settings such as 4x AA, 8x AF enabled. The HD 4870 X2 is expected to be formally launched this Tuesday the 12th.

Sources: ChipHell, GPU Café
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53 Comments on R700 Crossfire X Scaling Efficiency up to 104 %

#1
eidairaman1
wolf2009 said:
Interesting they didn't show that Nvidia loving game which reduces performance in Crossfire named Crysis . It would have been interesting if AMD finally found a way around that .
well Crysis is dead in the water as of support from the Creators, so to me its just something to not rate when other games perform way better, even ones from EA which are not that well optimized. It also doesnt support Multicards well either, Max PC did a Review of their zeropoint with their latest Dream Machine and Crysis Scored the Same for both systems where other games Outscored their Zero Point Considerably
Posted on Reply
#3
zithe
wolf2009 said:
Link not working .
Hello guys
At last I found a way enable CF in Crysis with my HD3870 CF.
yep there is not Crisys patch, CF hotfix yet and I still don't know what is the exactly cause.
Anyway I have resolved enable CF in Crysis and tested it. Here is my tested Benchmark with HD3870.

http://www.parkoz.com/zboard/view.php?id=tech_ati&page=1&page_num=40&select_arrange=headnum&desc=&sn=off&ss=on&sc=off&divpage=1&keyword=&no=983&category=

CF performance in Crysis and how to enable CF

how to enable CF in Crysis ? It was very simple
If your CF mode works well (example 3Dmarks ) download Crysis SP DEMO and installed it. There is folder your hard diskCrysis\game\config

then copy Crysis SP DEMO config folder and overwrite it in your installed retail crysis/game/config folder.
now test your CF. some guys tested it and worked very well.

to see Benchmark result Visit the link

I hope your crossfire works well
:P
Posted on Reply
#4
WarEagleAU
Bird of Prey
Thanks for the link Zithe. Awesome to see the scaling. If yall read the MaximumPC article about the dream machine, where they have two of these 4870x2s, it managed 29 fps with their uber rig. the Gtx280 also had 29 fps....
Posted on Reply
#5
TheGuruStud
*not buying the hype* While video perf isn't physics, more than 100% is calling for a BS flag to be thrown. There's always inefficiences, so 90% I'd buy, 104, not a chance in hell. Unless of course they're cheating.
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#6
candle_86
yea thinking same thing, there is no way to get over 99% effecient
Posted on Reply
#7
zithe
candle_86 said:
yea thinking same thing, there is no way to get over 99% effecient
COD4 crossfire 4870s. In many reviews it is over 100%. They're probably referring to performance in that game.
Posted on Reply
#8
Megasty
Yeah, calling it efficiency is just not a good way to word it. No electronic device can perform to its maximum efficiency. If anything, they are just referring to the performance of one card compared to 2 cards. But that's why its called scaling. DMC is an ATi-loving game even though NV have their sig in it. But why would anyone want to play it at 200+ fps when its perfectly maxed out at 100+ fps on a 3870x2 :rolleyes: Its just a weird thing to do in buying 2 of these just to play at framerates you don't even notice on selected games - unless you have the cash to waste like some of us do :toast:
Posted on Reply
#9
TheGuruStud
[QUOTE=unless you have the cash to waste like some of us do :toast:[/quote]You are all bastards and your mothers hate you!


:D:D:D:D:D:D:D
Posted on Reply
#10
candle_86
meh, im thinking of finding a nice GTX280 to replace my card with
Posted on Reply
#11
TheGuruStud
candle_86 said:
meh, im thinking of finding a nice GTX280 to replace my card with
:eek::eek:
Posted on Reply
#12
candle_86
well i am, my 3850 is to slow, CnC3 only gets 67FPS maxxed out at 12x10 on my comp
Posted on Reply
#13
zithe
candle_86 said:
well i am, my 3850 is to slow, CnC3 only gets 67FPS maxxed out at 12x10 on my comp
With AA?
I only think of getting into better hardware to have a stable framerate with the highest level of AA possible.
Posted on Reply
#14
candle_86
8x AA and 16x AF

i have no idea why AF is in CnC though
Posted on Reply
#15
robspierre6
wolf2009 said:
He meant that One shader on ATI Cards = 5 Virtual shaders or something like that .
And where did he get that from?
Nvidia's stream core can handle 3 construction or flops per cycle,ATI's can handle 2 construction/cycle.
So,ATI's 4870 with 800 stream cores working at 750MHz can process 22% more constructions/cycle than nvidia's 280gtx with it's 240 cores at 1300MHz.And that's with 2.5x smaller die.
Get you infos from reliable sites.
http://www.techreport.com/articles.x/14990/9
http://www.techreport.com/articles.x/14990/13
http://www.techreport.com/articles.x/14990/12
Posted on Reply
#16
eidairaman1
zithe said:
With AA?
I only think of getting into better hardware to have a stable framerate with the highest level of AA possible.
RTS utilize more CPU power, FPS rely more so on Graphics power.
Posted on Reply
#18
phanbuey
whoa.... i cant imagine the panic at nvidia. Gonna wait for the 260 price to drop so i can gen my SLI system :p. good tho. thats what you get for milking a cow for too long. go amd.
Posted on Reply
#20
Hayder_Master
woooow , impressive look for amd guys the do excellent work with crossfire , that mean you are not need to change you card every month when new games release just like nvidia card's , sorry for anyone who is like nvidia but this is the true numbers are talking
Posted on Reply
#21
Valdez
wolf2009 said:
What are you talking about ?

COJ has always been an ATI game. Its one of the few games on which ATI worked with the developers and the result of which IS 2900xt performs better than 8800GTX .
No. Coj was a nvidia game, but coj dx10 patch was developed with ati/amd.
Posted on Reply
#22
hat
Enthusiast
104%? I wonder how they managed that one..
Posted on Reply
#23
Eliranos
candle_86 said:
meh, im thinking of finding a nice GTX280 to replace my card with
just wait a bit and buy 4870 x2 will be much better and in good price
Posted on Reply
#24
Unregistered
robspierre6 said:
And where did he get that from?
Nvidia's stream core can handle 3 construction or flops per cycle,ATI's can handle 2 construction/cycle.
So,ATI's 4870 with 800 stream cores working at 750MHz can process 22% more constructions/cycle than nvidia's 280gtx with it's 240 cores at 1300MHz.And that's with 2.5x smaller die.
Get you infos from reliable sites.
http://www.techreport.com/articles.x/14990/9
http://www.techreport.com/articles.x/14990/13
http://www.techreport.com/articles.x/14990/12
What I'm saying is RV770 has actually 160 stream cores which function as 800 stream cores . So 160x5 = 800 stream cores .
#25
Eliranos
hayder.master said:
woooow , impressive look for amd guys the do excellent work with crossfire , that mean you are not need to change you card every month when new games release just like nvidia card's , sorry for anyone who is like nvidia but this is the true numbers are talking
funny you talk to nvidia lovers while you have a gforce pic in as your avatar :laugh:
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