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.
Facebook
Twitter
RSS
117 Comments
View All Comments
Agent11 - Sunday, November 18, 2007 - link
I was very disappointed with the use of a p35 chipset to compare crossfire to SLI.You use a motherboard with 16x by 16x pcie lanes for SLI but use one with 16x by 4x for crossfire... And then make a point of crossfire not scaling as well!
Ask any bencher, it does matter.
SmoulikNezbeda - Sunday, November 18, 2007 - link
Hi,I would like to know what numbers in graphs really represents. Are those average FPS or something like (min + max + ave)/3 FPS?
Thanks
Agent11 - Monday, November 19, 2007 - link
If it isn't average then theres a problem.wecv - Monday, August 14, 2017 - link
Hello, I am from the future.We now have 2GB GPUs with GDDR5 as entry level, 4GB-8GB GPUs for midrange with GDDR5 and 8GB GDDR5/GDDR5X/HBM2 or 11GB GDDR5X for High-end and enthusiast!
You may go and live back in the past.
TheOtherRizzo - Saturday, November 17, 2007 - link
What would you need a frame buffer of 512 MB for? That's enough room for about 80 1080p images. Sounds to me like someone at ATI is stuck in 1994 when framebuffers were the only memory on a graphics card...wecv - Monday, August 14, 2017 - link
Hello, I am from the future.We now have 2GB GPUs with GDDR5 as entry level, 4GB-8GB GPUs for midrange with GDDR5 and 8GB GDDR5/GDDR5X/HBM2 or 11GB GDDR5X for High-end and enthusiast!
You may go and live back in the past.
ZipFreed - Friday, April 13, 2018 - link
Lol, this comment is awesome and cracked me up. I am reading these older GPU reviews researching something and have been thinking similar sentiments to myself as I go.Glad you necro'd this.
0roo0roo - Saturday, November 17, 2007 - link
the convoluted naming systems of gpus garrantees pretty much only geeks in the know will make good purchasing decisions. this matters to the health of the pc game industry, i'm sure many have been turned off by the experience of going to their local store and buying a card within their budget and little other useful information and getting a lousy experience. i'm sure retailers actually benifit from the confusion since they can charge more and just hope the customer just bases their decision on their price range.Shark Tek - Saturday, November 17, 2007 - link
Finally GPU manufacturers are thinking right. Instead of making oven like heaters power hogs GPUs they're trying to make things right like Intel and AMD are doing with their CPU lines with less heat and power consumption.Lets see the upcoming generations how they will perform. ;)
araczynski - Friday, November 16, 2007 - link
I'm assuming this is a mid line card with better stuff coming out?otherwise I don't see the point of getting anything other than an 8800gt, prices are too close to give up top of the line for merely 60 or so bucks, or better yet, waiting a few more months till the 8900's roll out.