ocfanboy

Hey guys, I currently own a 4850 but I can get a 4830 for really cheap...
Below half the price of a 4850...
My mobo is an asus M4A78-E and supports crossfire in 8x8x mode...
My mobo is pcie 2.0.
So my question is, will a 4850+4830 in crossfire on my mobo with my specs be better than a 4870? I'm not really worried if my 4850 drops to 4830 specs but when they work together, will they defeat a 4870?
My CPU is a 550x2@ 3.9
and I got 4x1gb ocz 800 sticks
my psu is a corsair tx750...
Thanks guys

Penicilyn

Yes they will crossfire just fine. I'm actually doing the same thing. My Sapphire card was actually a 4830 which wasn't locked, it had all 800sp, so I just flashed it to a 4850.

Not only will they beat a 4870 but a 4890 or GTX280

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T3h_Ch33z_Muncha

I thought since the 4830 is lower clocked, that the 4850 will be underclocked to match it's specs? Or is my CF knowledge outdated?

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ocfanboy

thanks
Beat a 4890?
Really, that's awesome...
How would I flash a 4830 to be a 4850?



Muncha,
I believe what you saying is correct but if a 4850+4830 beats a 4870 and 4890 for below half the price than it's really got me all exited

jackeyjoe

your CF knowlege is outdated

Both can run at different speeds (and for a while too).

As for OP it will run fine and you will have more performance that a 4870. If your card has 800SP's you should flash it to a 4850 BIOS so you have increased performance

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rico2001

The is the last 4800 CF setup I haven't tried yet. Since both are DDR3 should be a good pairing.

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My reviews:
4870, 4870 Tri-fire, 4850 X2 Quad-fire, 4850 X2 vs. 4870 X2,
4850 X2 + 4870 Tri-fire, 4850 X2 + 4870 X2 Quad-fire, 4850 + 4870 Crossfire,
(NEW) 4890 vs. 4850 X2

Steam nick: rico2001

"The ability to learn faster than your competitors may be only sustainable competitive advantage." ~Arie de Geus

ocfanboy

Ok so my current 4850 has:
Gpu clock: 625mhz
memory clock:1986mhz
800 stream process units

the 4830 I just ordered has:
Gpu clock:575mhz
memory clock:1800mhz
And only 640 stream processing units...

Both ddr3 and 256bit Memory bus width...

Will I still beet a 4870?
I haven't seen a 4830 with 800 stream processing units yet?
Thanks

Penicilyn

Yes it will still beat a 4870, I don't know why you think the 4870 is so powerful, it's not much faster than a 4850. Unfortunately your 4830 is locked to 640sp so you can't flash it to a 4850 but you could overclock it well past the 4850 stock speeds to match the 4850's performance.

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Andr3az

You can't flash the 4830 to 4850, but 4830+4850 in CF would be nice performance.. It should get near 4890.

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rico2001

You will beat a stock 4890 with that setup but a 1Ghz 4890 will overtake you.

__________________
My reviews:
4870, 4870 Tri-fire, 4850 X2 Quad-fire, 4850 X2 vs. 4870 X2,
4850 X2 + 4870 Tri-fire, 4850 X2 + 4870 X2 Quad-fire, 4850 + 4870 Crossfire,
(NEW) 4890 vs. 4850 X2

Steam nick: rico2001

"The ability to learn faster than your competitors may be only sustainable competitive advantage." ~Arie de Geus