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ATI 4850 Graphics Card Question

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Last response: in Graphics Cards
April 11, 2011 10:44:39 PM

Hello,

Right now i have a Sapphire 4850, (1 GB) and was wondering the kind of performance i would get if i paired it with another in Crossfire... What about 3?

Would it match today's gfx cards?

Oh, and take a look at my specs, should i upgrade anything else before getting a new gfx card?


Thanks!

Specs:

AMD Phenom II x4 630 @2.8 ghz
Some CF supported MOBO
XFX 650 watt PSU with CF Support
4gb ddr2 ram
Saphhire 4850 1GB
thanks

More about : ati 4850 graphics card question

April 11, 2011 10:56:13 PM

OK! BTW its a Phenom II, does that make a diff?
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a b U Graphics card
April 11, 2011 11:04:53 PM

We'll you gain a substantial amount of performance in Crossfire from 4850's....


AMD Phenom II x4 630 @2.8 ghz :: You've mixed two part numbers hear, 630 is an Athlon II X4 that runs @2.8Ghz. Phenom's are all 9XX, except for the brand new 840....

Some CF supported MOBO :: would be good to know brand and model of motherboard, many say they support CrossFire but if it doesn't support x8 / x8 PCI lanes per slot you would be Wasting your time to Crossfire, you would gain next to No performance.


XFX 650 watt PSU with CF Support :: you need a good solid 650watt supply for those 4850's. What is the exact model? Check for 54amps or more total on 12 volt rail(s) (listed on the supply itself) and, enough PCI-E power connectors to hook up both cards.
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April 11, 2011 11:10:37 PM

Ok, thanks for replying guys!
The mobi has two x16 slots working at x16, so that's good, and the psu checks out as well.. Lemme run CPU-z and see what my processor REALLY is :) 
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April 11, 2011 11:15:23 PM

OK, whoops it is an ATHLON II x4 630 haha..

Would it bottleneck the gfx cards too much?
I am running at 1920x1080 btw, but have a 1280 x1024 if i need to downgrade my monitor for performance...
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a c 376 U Graphics card
April 11, 2011 11:33:59 PM

ct1615 said:
in games that support CF, you would be on par with an ATI 5870 (so very good performance) but your athlon II x4 may get bottlenecked in some modern games.

All the reviews I'm seeing of the HD4850x2 have it trading blows with or perhaps slightly better than the GTX 285.

I would recommend just ebaying your current card and getting something more current. Crossfired HD4850s will give you performance in the area of current cards like the HD6850 and GTX 460. Those cards however have more advanced features like DX11 compatibility and you wont have to deal with profiles/crossfire scaling issues. Perhaps more importantly current cards have MUCH better power efficiency. 2 HD4850s use about 80w at idle and 200w under load while a card like the HD6850 uses 20w at idle and 110w under load. If you are the sort to leave your computer on 24/7 like myself that really adds up(over $50 over the course of a year) so the money you would save by getting a second HD4850 vs ebaying it and grabbing a newer card isn't as much as you might think.
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April 11, 2011 11:39:01 PM

ok, thanks, seems like a logical deal, but before i ditch the 4850s, what kind of performance would i get with 3 of these? would it not even make a difference, other than even higher power cost?
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a b U Graphics card
April 11, 2011 11:47:50 PM

No a 630 won't slow you down enough to worry about......

Actually, running at a Lower resolution makes it easier on the GPU, not the CPU.... (hey, higher resolution means more work for the GPU...)

4850's were being compared against 5770s when they first came out. They are very close in performance. A pair of 5770s will meet or exceed the performance of a 5870 which is pretty good power for most games....

True 4850s only do DX10 and not DX11. And, 4850's won't support triple monitors. BUT, you can probably pick up a 4850 for $50, I'd say it would be Well worth it....
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a c 376 U Graphics card
April 12, 2011 2:22:21 AM

Vince22 said:
ok, thanks, seems like a logical deal, but before i ditch the 4850s, what kind of performance would i get with 3 of these? would it not even make a difference, other than even higher power cost?
Until the current HD6000 cards triple crossfire has had rather bad scaling and isn't worth considering really.
As for your CPU giving it an OC certainly wouldn't hurt if your motherboard allows for such.

jb6684 said:
4850's were being compared against 5770s when they first came out. They are very close in performance. A pair of 5770s will meet or exceed the performance of a 5870 which is pretty good power for most games...
Nah, it was the HD5750 that was comparable to (but slightly better than) the HD4850. The HD5770 was the HD4870 equivalent.

ct1615 said:
probably since ATI 5870 are in a different generation so they won't be paired against ati 4850's but tom's hierarchy chart has them in line.
Yeah, I saw that but I think it's off unless driver improvements have massively increased crossfire performance on the HD4000 since then. The HD4850x2 came out pretty late in that generation so I doubt it. In general I find this to be more accurate than the Tom's hierarchy chart though it's not perfect either;
http://www.overclock.net/graphics-cards-general/502403-...
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April 12, 2011 1:24:31 PM

Would pairing a 4850x2 with my 4850 be worth it?
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a c 376 U Graphics card
April 12, 2011 6:01:59 PM

Nah, that's the same as triple crossfire. You wouldn't get much improvement from a third card and the setup would use a ton of power and give off a lot of heat.
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