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(2) 3870 vs (1)5770

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April 23, 2010 12:21:31 PM

I was wondering which one is better (2) 3870's in crossfire mode at clock speeds of 800 mhz, memory speed of 1170 mhz , memory is 512 mb gddr4. OR (1) MSI Thunder bird 5770. I appreciate all the help and thank you =).

More about : 3870 5770

April 23, 2010 12:24:58 PM

2X3870 will perform more than a 5770.

but takes more power runs hotter

if both 3870 are oC'ed than can give good performance
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April 23, 2010 1:26:23 PM

actually i belive one 5770 will perform better, 3870x2 is matched by a 4850, which is outperformed by the 5770, keep in mind that 2 3870 will have scaling issues in CF and AMD is likely to stop updating drivers for this configuration soon, also i think the 3870 has the same power TDP of the 5770, which means going 2x 3870 doubles ur power consumption for less performance.
don't foget 3870 is dx10.1 while 5770 is dx11
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April 23, 2010 2:02:02 PM

I would get a 5770 and sell the old 3870.
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April 23, 2010 6:35:07 PM

+1 5770 is the way... get rid of the 3870...
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April 23, 2010 6:55:12 PM

thanks guys but i am looking for a card that performs more than my 3770 in crossfire mode but it's price range is below $180.
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April 23, 2010 7:52:10 PM

^ You could sell the 3870, and a 5770 would cost 150$.

The way I see it you have 3 options. I rated them by how much sense they make.

150$
-50$
----------------------------------

100$ For a 5770.

Or Option 2:


0$
+50$
--------------------------------------

50$ For 3870X2

OR Option 3:

0$
+100$
------------------------------------------
100$ for A 3870X2 by 3870 Trifire.
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a b U Graphics card
April 23, 2010 8:03:33 PM

Two 3870s perform between a 4850 and a 4870 (closer to the 4870) on average. So it is approximately equal to or slightly below a 5770.

The 5770 is much better due to better scaling, lower power consumption, DX11, eyefinity, runs cooler, etc
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a b U Graphics card
April 23, 2010 8:17:13 PM

5770 all the way.

2x3870 Xfire is between 4850 & 4870, and 5770~4870. Those 2 3870 will have much larger power consumption and will be hotter.

5770 will be a lot more power efficent, DX11 support, will produce less heat and will be little more powerfull due to Xfire scalling issue in some games.
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a c 106 U Graphics card
a b } Memory
April 23, 2010 9:03:13 PM

^+1 for bluescreendeath

If it was me I would add another 3870 until I could save up for a better card, assuming you can get the 3870 cheap of course. Still, I was running dual 3850s for a while and CF support can be a little buggy on the 3800 cards, not to mention the ATI driver team is providing fixes mainly for 5000 series cards and just keeping the 3000 series cards in there as comparability. Then again, my second card was a vision overclocked 3850 that caused both cards to simply show up as "3800 series" cards in the drivers, so my experience was a little a-typical ^_^

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April 24, 2010 3:29:46 AM

megamanx00 said:
^+1 for bluescreendeath

If it was me I would add another 3870 until I could save up for a better card, assuming you can get the 3870 cheap of course. Still, I was running dual 3850s for a while and CF support can be a little buggy on the 3800 cards, not to mention the ATI driver team is providing fixes mainly for 5000 series cards and just keeping the 3000 series cards in there as comparability. Then again, my second card was a vision overclocked 3850 that caused both cards to simply show up as "3800 series" cards in the drivers, so my experience was a little a-typical ^_^


Yea both of my cards are clocked to gpu clock : 800 mhz , memory speed: 1170. Also my system recognizes them as 3800 series.
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April 27, 2010 11:47:58 AM

Ok i purchased two MSI Hawk 5770 to crossfire and a KINGWIN Lazer 1000W Modular 80 PLUS BRONZE Certified psu. I know 1000 watts will definitely be enough for my system and perfect for future upgrades :na: 


:hello: 
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April 27, 2010 7:46:50 PM

^ I doubt there will be any future involed, It is a Kingwin PSU.
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April 27, 2010 11:04:35 PM

Not the worst, but not any where near the best.
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Best solution

a b U Graphics card
April 27, 2010 11:14:13 PM

reaper23 said:
so kingwin is a bad company?

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

this is the psu i ordered.

Its a good company, its a high end enthusiast 1000 watt psu.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...

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April 27, 2010 11:23:38 PM

I said it was not the best compared to superior units (like that one)
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April 28, 2010 1:27:46 AM

Best answer selected by reaper23.
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