ATI Radeon HD 3870 & 3850: A Return to Competition
by Anand Lal Shimpi & Derek Wilson on November 15, 2007 12:00 AM EST- Posted in
- GPUs
Multi-GPU Scaling: Two 3850s = One 8800 GTX?
AMD only sent us a pair of Radeon HD 3850s for this review (believe it or not, we had to beg to get a single 3870), so our only CrossFire numbers come from this setup. That being said, the performance is quite respectable:
Believe it or not, but a pair of these $179 Radeon HD 3850s actually gives you the same performance as a single GeForce 8800 GTX.
| Multi-GPU Scaling (2560 x 1600) | Radeon HD 3850 CF | GeForce 8800 GT SLI |
| Oblivion | 1.7x | 1.87x |
| Unreal Tournament 3 | 1.48x | 1.66x |
Scaling looks pretty good from the Radeon HD 3850, however it's still not as good as what NVIDIA is able to achieve with the 8800 GT. NVIDIA consistently achieves about 11% better scaling from one to two GPUs than AMD.
The other problem with CrossFire is that it simply doesn't always work, so a pair of 3850s is not necessarily a better option than a single 8800 GT or GTX. Case in point would be the two other games that we wanted to include here: Quake Wars and Call of Duty 4, both gave us lower frame rates with CF enabled than without. AMD's release notes for the Radeon HD 3800 drivers informs us that some applications may show a performance decrease with CF enabled, so we're not too surprised.
While it'd be nice to be able to purchase two cheap cards and get better performance than the best out there, there are simply too many caveats to really embrace the idea.
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Anand Lal Shimpi - Thursday, November 15, 2007 - link
I was talking about http://anandtech.shopping.com">http://anandtech.shopping.com, currently working on getting a solution to the RTPE issues :)Take care,
Anand
dm0r - Thursday, November 15, 2007 - link
Loved the review and also the 3850....this is the real midrange card ill buy...excellent power consumption.Just only 1 thing missing is the temperature of the gpu's, but anyway excellent review
Thanks
yacoub - Thursday, November 15, 2007 - link
Why are you recommending people wait for the 256MB of the GT? That model has no bearing on anything for people playing Crysis, CoD4, World in Conflict, etc. All the testing done on the 512MB GT shows that 512MB is really the new minimum for vRAM for gamers running a 19" or larger display and the 256MB model is well and truly irrelevant to their purchase options.Instead, the reason they should wait a couple weeks is just to see how the 512MB's availability and pricing changes.
yacoub - Thursday, November 15, 2007 - link
I really really like the new style to the charts and graphs. Everything is very easy to read and understand! Much improved over some older review designs! =)Also, lol @ how pathetic the 8600GT performs! :D
Iger - Thursday, November 15, 2007 - link
Actually, in terms of power consumption I would call this round a win for AMD. My home PC is on 24/7, but I really get to play on it for maybe a couple of hours a day at best (actually, probably, much less). AMD leads idle consumption by 40w, while losing the load power by 5. I think for pretty much every one 3870 will turn out cheaper than 8800GT. And I think it's important enough to be mentioned in article (no offence - just trying to be helpful).About prices - currently on overclocker.co.uk 8800GT 512 is preorderable for 350$, 8800GT 256 - for 290$, 3870 - for 320$ and 3850 - for 235$ (and AMD cards actually are listed in stock(!!) - impressive).
With such disposition I would be close to buying a 3850 atm, btw... But, anyway, europe's prices are terrible :(
Thanks very much for the article - it'll serve to satisfy at least some hunger before Phenom's ;)
Ilya.
Leadthorns - Thursday, November 15, 2007 - link
Some review sights suggest that the IQ is marginally better on the 3870. Would be interested to know your take on thislux4424 - Thursday, November 15, 2007 - link
In 2006 there were number of articles and presentations about benefits of new WDDM (Windows Vista Driver Model). These also mentioned WDDM 2.1, coming with DX10.1, and the benefits it should bring. Couple of examples:Since then it's absolute silence on the matter. It would be really great if Anandtech would cover the promises made WRT WDDM 2.1 (DX10.1) or even WDDM 2.0 (DX10) after SP1 for Vista is released.
Regards
GTMan - Thursday, November 15, 2007 - link
Sentence with no ending..."Hopefully with DX11 Microsoft will be a little more used to the"
Thanks for the article, interesting reading.
Anand Lal Shimpi - Thursday, November 15, 2007 - link
eep, thanks :)Take care,
Anand
NullSubroutine - Thursday, November 15, 2007 - link
I am extremely disappointed in the review of the product.1) Only Vista was used, though XP has a lot larger user base.
2) Limited variety of games.
3) Limited variation of AF/AA
4) No UVD tests.
All could be forgiven if the title would have included First Look: DX10. I understand there is a limited time to do tests and it seems you had trouble getting your samples so this could lead to the problem. I usually look to anand for the most complete review of products (rather than having to look at many different incomplete ones sites use), but I believe this review to be incomplete and not what I expect from Anandtech.
I await follow up reviews to reinstate my faith in this site. (and yes I am sure I will modded down as I will probably been seen as a 'hater' rather than trying to give constructive critism.