MultiGPU Update: Two-GPU Options in Depth
by Derek Wilson on February 23, 2009 7:30 AM EST- Posted in
- GPUs
Calculating Value: Performance per Dollar
Have you ever wondered what you get for your money? Well, I suppose that's a silly question, as anyone reading this page could guess. There are a couple of ways to present this data, and we wanted something simple to understand. It is important to remember that the way we've presented this information, absolute performance is not accounted for at all: the only metric we are looking at on this page is how much you get for the money you spend. Keep in mind that a good deal on 25 frames per second might not be what you are after: absolute performance is important too and we'll be looking at that in the next section. In general, more expensive solutions perform higher, so even if there is lower "value" the performance increase could be worth it to some buyers.
We will be using these prices for this calculation.
| NVIDIA GeForce GTX 285 SLI | 700 |
| NVIDIA GeForce GTX 280 SLI | 630 |
| NVIDIA GeForce GTX 260 SLI | 400 |
| NVIDIA GeForce 9800 GTX+ SLI | 290 |
| NVIDIA GeForce GTX 295 | 500 |
| NVIDIA GeForce GTX 285 | 350 |
| NVIDIA GeForce GTX 280 | 315 |
| NVIDIA GeForce GTX 260 core 216 | 225 |
| NVIDIA GeForce GTX 260 | 200 |
| NVIDIA GeForce 9800 GX2 | 300 |
| NVIDIA GeForce 9800 GTX+ | 145 |
| ATI Radeon HD 4850 X2 | 290 |
| ATI Radeon HD 4870 512MB CrossFire | 350 |
| ATI Radeon HD 4850 CrossFire | 290 |
| ATI Radeon HD 4870 X2 | 440 |
| ATI Radeon HD 4870 1GB | 220 |
| ATI Radeon HD 4870 512MB | 175 |
| ATI Radeon HD 4850 | 145 |
These prices were gathered from newegg.com and google and do NOT include mail-in rebates.
Our method here is to look at the performance you get for every hundred dollars spent. Specifically this answers the question: how many fps do you get in a specific game for every hundred bucks you spend on a particular graphics card. To calculate this data, we divided our performance data in average framerate by the cost of the card and then multiplied the result by 100. This isn't really a number that means something tangible: it's more just a metric that helps us relate the value of cards within a specific test. You can't compare any of these numbers between games, or even between resolutions, except in terms of relative order -- you need to look at one test and one resolution at a time.
To help out, if all the cards in a test had a score of "10", that would mean for every hundred dollars you spend you get 10 frames per second of performance in our test. Of course, though our value chart shows all the cards on equal footing, more expensive cards will have proportionally higher performance: if you wanted 30 frames per second in that specific benchmark you would need to spend at least $300.
So this isn't the bottom line in what to buy. These benchmarks are an indication of relative value outside absolute performance. Absolute performance is also a value metric: higher performance is more valuable and may be disproportionally more valuable if it crosses a playability threshold. These graphs will help show how much of a premium or a deal you are paying or getting on your absolute performance relative to other parts.
In general, multiGPU solutions will show less "value" than single GPU counterparts because we see less than linear scaling. If a two card solution costs twice as much while performance scales at less than 2x, we'll see a lower "value" result. The single card multiGPU options have a better chance at improving value than two card solutions, as they can sometimes be found for less than twice the cost of their nearest single card single GPU derivative.
Facebook
Twitter
RSS
95 Comments
View All Comments
makdaddy626 - Monday, February 23, 2009 - link
I really appreciate the article and all the research and work that went into it. Kudos to you for it.A small suggestion would be to take into account a minimal playable frame rate in the value and performance per dollar data, where a ZERO would be substituted for the frame rate in instances where a card failed to reach a playable rate for a given game/resolution. I feel this would more accurately reflect the value of the card(s) as 15 FPS in most games presents no value.
Mastakilla - Monday, February 23, 2009 - link
I agreeMinimum framerates should be more important then average ones even...
Interesting article though! I didn't know the 4850x2 was so competitive...
Only in Crysis it does worse the the 285, which I had in mind for my new pc...
That does make me wonder if the 285 might be a more future proof investment...
makdaddy626 - Monday, February 23, 2009 - link
Yes, But I meant "minimum" in the sense of what the game needs to be played at, even you measure "average" - I just don't think it's fair to say that the 9800 GTX shows the highest performance per dollar on the Crysis Warhead 2560x1600 chart when it turns in frame rates of 13.5. To me that is ZERO value for the money because it's not playable. Someone wanting to play at those settings would be wasting EVERY dollar spent on the 9800 GTX.7Enigma - Tuesday, February 24, 2009 - link
Completely agree. Statistics mean nothing when not taken in a proper context. Zero, NA, or just leaving it blank would be much better. Someone looking to use that card would then click on a lower resolution and see if it is a viable choice. It would reduce the amount of data that needed to be compared as the reader of the article, and make caveats like in the explaination section about comparing between cards/resolutions etc. almost moot.Spivonious - Monday, February 23, 2009 - link
The framerate charts are all but worthless if you're focusing on how performance scales. Why not some line graphs with all three resolutions shown and card models along the x-axis? Then the reader could see how performance is affected by the lower memory of some models and how it scales linearly with the higher-end cards.7Enigma - Monday, February 23, 2009 - link
I would have to agree with this. I always enjoyed the broken line graphs that show multiple resolutions and framerates in the same graph. It makes comparisons very easy and more importantly allows EVERYONE to see their particular resolution without having to click on a link for a separate graph.It's fine to keep your specialized performance/$ and % increase from a single card the way you have it as I understand what you mean about not comparing between resolutions but for the general frame rate comparisons I preferred the old way.
One thing I failed to see which I have seen in previous reviews with X-fire/SLI (or was it with tri/quad setups?) is the stuttering that can be present. I thought it was an Anand article but could have been from another site.
SiliconDoc - Wednesday, March 18, 2009 - link
The charts are designed to autopop to 2650x - and we all know the red ragers have screamed the ati cards are great there.EVERY CHART pops to the favored ati $2,000.00 monitor resolution.
It's not an accident, Derek made them.
C'DaleRider - Monday, February 23, 2009 - link
Derek, if you want to impress, and this article does with its research, please invest in some writing manuals and learn some grammar.Take this sentence:
"This unique card really shined and held it's own all the way up to 2560x1600."
Your use of "IT'S" in this instance is incorrect. IT'S is a contraction for IT IS, not a possessive word, which is ITS.
Or take this passage, "It's very surprising to us that AMD hasn't pushed this configuration and that Sapphire are the only manufacturer to have put one of these out there."
Sapphire is a company or organization, I realize that. But in this instance, you're referring to a group in its singular fashion, or as a single unit. That context is seen by the only manufacturer in the sentence.
That sentence should have read. "It's very surprising to us that AMD hasn't pushed this configuration and that Sapphire IS the only manufacturer to have put one of these out there."
Here's the rule for that (taken from both MLA and APA handbooks): If the action of the verb is on the group as a whole, treat the noun as a singular noun. If the action of the verb in on members of the group as individuals, treat the noun as a plural noun.
This means companies, such as Microsoft, IBM, Sapphire, Ford, etc., when being referred to the company as a whole collective, single entity, has to have a singular verb.
But, if you are referring to pieces of the whole, such as "the engineers of Ford are.....", or "The programmmers at Microsoft are.....".
Please invest in some proper English grammar texts and take time to read and learn from them. Your error laden grammar you write and use is quite distracting and detracts from what is supposed to be a professionally run hardware site.
Hire a proofreader or good copy editor if learning proper grammar is too difficult.
Otherwise, this was a great article!
The0ne - Monday, February 23, 2009 - link
I don't really mind Anandtech articles as much in terms of presentation, spelling and graphics. Other sites such as Ars Technica, x-bit labs, and so forth are much worst. The first is first since they've started writing articles concerning everything, it seems.If I did mind, I say stick to the general guidelines writing manuals, procedures, pamphlets, technical docs, etc. But being online, this isn't the case and won't ever be. Again, I don't mind as much because I do the same thing myself where I hardly pay attention to spelling or grammar when writing online. It's only when I write short stories or for work that I pay attention. Strange but comfortsure does make one do these things :)
And yes, I do write all sorts of articles daily.
oldscotch - Monday, February 23, 2009 - link
"Your error laden grammar you write and use is quite distracting and detracts from what is supposed to be a professionally run hardware site."That should read "The error laden grammar you use is quite distracting..." or just "Your error laden grammer is quite distracting..."
"Your error laden grammam you write and use..." is redundant.
Perhaps you should learn some grammar yourself before criticizing others about theirs.