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4870 1gb vs 4870 512 vs 4850 512 CF

Last response: in Graphics & Displays
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October 31, 2008 3:33:20 PM

4870 1gb vs 4870 512 vs 4850 512

1900x1200 resolution
Gaming

Was going for 4870 1 gb until price cuts on 4870 512 and 4850 512.

Thoughts?
a b U Graphics card
October 31, 2008 3:46:25 PM

I think there is only about £30.00 or $45.00 difference i'd still go for the 1gb version and maybe CF later.
October 31, 2008 3:55:50 PM

Here is what I'm seeing:
4870 1gb $300
4870 512 $220
4850 512 $120
Related resources
October 31, 2008 4:00:21 PM

Best choice is HD 4850 CF or wait a few days for the HD 4850 X2 to be introduced officially.
October 31, 2008 4:06:09 PM

i guess even w/a 512 memory, 4850 512 CF is performs better than a single 4870 1gb even at 1900x120 & costs $60 less
October 31, 2008 4:29:24 PM

yes but to see a future in gaming (not gauranteed) I'd go with a 1 gig memory since games will require more complex Textures and introduce more AA opportunities which mostly stump 512 cards.

Most ppl find it unnecessary but those are the people that can't run Stalker, Crysis, Warhead, Supreme and FC 2 properly.

Games are only going to get more complex, and as Dx 10 (may be 10.1) are implement more and more in2 games, it becomes necessary for a card to be strong even for low resolutions.



October 31, 2008 4:29:29 PM

honestly go for something with 1gb of memory. 512mb is starting to show its limits. I have a 4870x2, and Farcry 2 at 1680x1050 with 4xAA 16xAF(Ultra High) eats up to 750-910mb of VRAM. Crysis also ate upwards to 900mb of Vram on the final boss (same settings)
October 31, 2008 4:41:39 PM

deardeath said:
honestly go for something with 1gb of memory. 512mb is starting to show its limits. I have a 4870x2, and Farcry 2 at 1680x1050 with 4xAA 16xAF(Ultra High) eats up to 750-910mb of VRAM. Crysis also ate upwards to 900mb of Vram on the final boss (same settings)


Wowzers. What program are you using to monitor VRAM usage?
October 31, 2008 4:46:13 PM

For crysis you can just use the integrated benchmark tool, it just runs while you play or you can do the Crysis Tool, and just run scripted benchmarks, it shows how much ram is occupied.
October 31, 2008 5:08:05 PM

Riva tuner on my G15 keyboard screen =)
Anonymous
a b U Graphics card
October 31, 2008 5:12:40 PM

no it doesn't show the amount of vram... it shows the amount of phsysical ram being used... warhead rarely goes over 1000 while the original crysis can eat up to 1400

so its not vram...

wow 100$ keyboard ftl
a c 91 U Graphics card
October 31, 2008 5:22:52 PM

How's about 2 1gig 4850's ? You seem to want an ati product. Those cards at that res should be fine.
October 31, 2008 5:54:57 PM

4850 1 gig goes for $200, so CF would be around $400. not sure if it is worth it over 4870 1gig
Anonymous
a b U Graphics card
October 31, 2008 5:55:33 PM

dear death look at post times

the time i opened thread was before 7:08 so i didn't see your post... + g15 is an overly expensive keyboard


you fail dumbass
October 31, 2008 5:58:41 PM

$50 keyboard overly expensive?
calm down the nerd rage man.
October 31, 2008 6:02:47 PM

I'd say that neither of you 2 are productive right now. So I think both of you should tuck in ur e-penises and help the OP:) 

P.S

Whats wrong with a 100$ keyboard? I have razer Tarantula paid 90$ + tax. What's the problem?


@ Op

try to get a 1gig car dif your going to go for the 4850s:) 
October 31, 2008 6:08:29 PM

Agreed,
you can also watch out for surprise sales at the places you shop. I got my 4870x2 at 499.99 CAD on a surprise sale on ncix.com. Thats of course if you want to up your budget.
October 31, 2008 6:24:08 PM

I see more than a couple misconceptions about ATI cards and memory. Unlike Nvidia where they use wider buses to fully support more memory i.e. 8800GTX with 384bit bus that can address a full 768kb of memory, or 280 with a 512 bit bus that can address a full 1gb ATI still is using a less expensive 256 bit bus on the 4000 series cards. So your 1mb card really can only address 512kb. They doubled the memory and used it along with some addressing scheme that allows them to improve throughput but the 4000's can still only address 512 at a time which nullifies the argument about more memory for larger textures. Since they don't share memory the 4870X2 still has 512kb addressable per card.
October 31, 2008 6:48:27 PM

Then why does the 4870 1gb perform far better than the 4870 512mb? on higher resolutions/AA (which requires more memory) ?
October 31, 2008 8:28:10 PM

its not actually far, its about 5 fps, but you notice a difference:)  Plus the 1 gig has a higher min frame rate:) 

http://www.guru3d.com/article/amd-ati-radeon-hd-4870-10...

Its a hit miss, obviously the 1 gig is either as good or better than the 512:) . People tend to forget that the higher the Vram the higher the min frame rate, not good enough to have avg with a good min.:) 
December 29, 2008 9:30:49 PM

anartik said:
I see more than a couple misconceptions about ATI cards and memory. Unlike Nvidia where they use wider buses to fully support more memory i.e. 8800GTX with 384bit bus that can address a full 768kb of memory, or 280 with a 512 bit bus that can address a full 1gb ATI still is using a less expensive 256 bit bus on the 4000 series cards. So your 1mb card really can only address 512kb. They doubled the memory and used it along with some addressing scheme that allows them to improve throughput but the 4000's can still only address 512 at a time which nullifies the argument about more memory for larger textures. Since they don't share memory the 4870X2 still has 512kb addressable per card.



The 4870 uses gddr5 which has twice the memory threads so the 256bit that the 4870 has is effectively 512bit transfer rate while keeping the chip smaller.

http://www.xbitlabs.com/news/memory/display/20081225124...
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