[sacred]

CJ sent us a performance chart comparing Radeon HD 3870 X2 against the GeForce GTX 280 and GTX 260 on some of the games out there. Although, the benchmarks are done internally by Nvidia but it is probably conclusive to compare GTX 280 and GTX 260 here. The drivers for GeForce GTX 200 cards is the upcoming GeForce Release 177 while the drivers for 3870 X2 is a rather old Catalyst 8.3.

Finally some gaming performance of the GTs...

http://sg.vr-zone.com/articles/GeFor...ance/5817.html

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[Guilherme]

LoL, the same old trick, they cut the base of the bars and the new products seems to be 10 times faster than old one. Anyway, 4870 will be faster than 3870X2, so, R700 has great chances to give Nvidia a run for its money. I strongly believe the shared memory between 2 cores will solve the problem with render to texture and alternate frame rendering. Adding this to more some improvements here and there and I'm sure 4870X2 will be almost 100% faster than 4870 all the time. AFR is the way to go, the only problem was the dedicated memory for each chip.

Let's see what happens.

[waver_01]

yeah if the 4870X2 is around the 2.0 line we will finally have a balanced generation!!!!!!

[Ish718]

Originally Posted by Guilherme

LoL, the same old trick, they cut the base of the bars and the new products seems to be 10 times faster than old one. Anyway, 4870 will be faster than 3870X2, so, R700 has great chances to give Nvidia a run for its money. I strongly believe the shared memory between 2 cores will solve the problem with render to texture and alternate frame rendering. Adding this to more some improvements here and there and I'm sure 4870X2 will be almost 100% faster than 4870 all the time. AFR is the way to go, the only problem was the dedicated memory for each chip.

Let's see what happens.

lol Im sure HD4870 x2 won't be 100% faster than a HD4870, well not in games for sure.
You will NEVER get 100% performance of both cards if ur running Crossfire or SLI, they don't scale THAT good lol. Scalability is quite atrocious with 4 GPUs.

[Teemax]

I detest the practice of cutting off the lower part of the chart!

The people who do this should be stripped off their math credentials in school

[Guilherme]

Originally Posted by Ish718

lol Im sure HD4870 x2 won't be 100% faster than a HD4870, well not in games for sure.
You will NEVER get 100% performance of both cards if ur running Crossfire or SLI, they don't scale THAT good lol. Scalability is quite atrocious with 4 GPUs.

Never say never, dude. Look at 1920 res. 3870X2 vs 3870. 109% is good for you?

[Megalord]

Originally Posted by Ish718

lol Im sure HD4870 x2 won't be 100% faster than a HD4870, well not in games for sure.
You will NEVER get 100% performance of both cards if ur running Crossfire or SLI, they don't scale THAT good lol. Scalability is quite atrocious with 4 GPUs.

Its a obvious fact but well, lets see what ATI has done to the bridge. Should perform much better than that on 3870X2.

[Megalord]

Originally Posted by Teemax

I detest the practice of cutting off the lower part of the chart!

The people who do this should be stripped off their math credentials in school

Its a marketing slide anyway. And i guess most of us don't trust figures from a marketing slide.

[Guilherme]

Originally Posted by Ish718

lol Im sure HD4870 x2 won't be 100% faster than a HD4870, well not in games for sure.
You will NEVER get 100% performance of both cards if ur running Crossfire or SLI, they don't scale THAT good lol. Scalability is quite atrocious with 4 GPUs.

More for you:

96.3%:



98.4%:

[Guilherme]

Concluding, with memory share in 4870X2 the number of titles getting near to 100% (or even 100%) will be much greater. And, I didn't say 100% before, I sad almost.

[Ish718]

Originally Posted by Guilherme

Concluding, with memory share in 4870X2 the number of titles getting near to 100% (or even 100%) will be much greater. And, I didn't say 100% before, I sad almost.

Ok you win,geez lol.

But I want to see more benchmarks, it also depends on the game and how well it supports multi gpu.

[IversonGarnett (x3m)]

May I ask whats the clock speed difference of the 3870 vs 3870X2?

[NextGen_Gamer]

Originally Posted by IversonGarnett

May I ask whats the clock speed difference of the 3870 vs 3870X2?

Radeon HD 3870 has a core clockspeed of 775MHz and a memory clockspeed of 1125MHz (2250MHz effective); Radeon HD 3870 X2 has a core clockspeed of 825MHz and a memory clockspeed of 900MHz (1800MHz effective).

Current rumors point to Radeon HD 4870 having a core clockspeed of 850MHz, a shader clockspeed of 1050MHz, and a memory clockspeed of 1935MHz (3870MHz effective). The original, really old rumor for Radeon HD 4870 X2 was the same for core and shader, but its memory clockspeed was down to 1800MHz (3600MHz effective). My guess is that rumor will prove correct.

[Niceone]

Originally Posted by Guilherme

LoL, the same old trick, they cut the base of the bars and the new products seems to be 10 times faster than old one. Anyway, 4870 will be faster than 3870X2, so, R700 has great chances to give Nvidia a run for its money. I strongly believe the shared memory between 2 cores will solve the problem with render to texture and alternate frame rendering. Adding this to more some improvements here and there and I'm sure 4870X2 will be almost 100% faster than 4870 all the time. AFR is the way to go, the only problem was the dedicated memory for each chip.

Let's see what happens.

HD4870 X2 still uses PLX chip meaning it's Crossfire solution meaning that it doesn't have shared memory etc.

Besides if it's two HD4870-cards then power consumption should be astronomical. If single HD4870 512MB already has 157W TDP..then add PLX chip's power consumption then memory.. if it's 2x512MB then it's double for memory and if it's 2x1024MB? Even if it's shared memory thingy it should have more power consumption from memory..unless they use only 512MB..

Besides:

From same review: When single HD3870 got 78% of 9800 GTX's numbers HD3870 X2 got 108%

On average: HD3870 X2 has 40% more performance than single HD3870..according to that review you used. I know I'm not neutral, but even I don't resolve using that kind of cherry picking methods

[ImmortalZ]

Jesus H. Christ, please stop saying that the 4870 will have split frequencies for it's core and shaders. It will not happen. Period.