3gb or 6gb gpu for dual 1440p? (r9 280x)

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I am shopping for a gpu...but am not quite sure on what to buy...

I am getting two r9 280x for it as I need the DVI-D.

Would I notice any benefit for 6gb of vram vs 3gb? I know vram doesn't scale in crossfire.

Would the 3gb per gpu (assuming also per monitor) be enough? the 6gb costs about the same but is at slightly lower clocks.

6gb http://www.newegg.com/Product/Product.aspx?Item=N82E16814127786
3gb http://www.newegg.com/Product/Product.aspx?Item=N82E16814121803

also, if 3gb is enough, should I consider the "toxic" from sapphire? or is the benefit not worth the cost...and lack luster reviews...

I will be putting my own thermal paste on if needed...because I can...
 
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Gee Bee
As i said you will be fine for your intended use. Spending more on toxic will not make that much difference. You can of course easily oc gpu and vram to bring to toxic specs. My 280x run fine at 1150 in cfx, starts showing problems at 1200mhz.
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Gee Bee

Gee Bee

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it would depend on what your on each monitor at the same time.

i game 1440p with one monitor perfectly fine in cfx. I suspect you could easily have something up and running on other if it wasn't too graphics intensive

I have two HIS Ice Q 2 and they don't usually go over 65c and are among the quietest
 
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okay, what if I was running a small game in the other...or a game that actually worked with dual displays...

also, how would 3 be affected...doubt I would ever go 3 displays...but I would end up having to get a third gpu for that...but I'm not crazy...

would ram affect video rendering much? I will be rendering others content in adobe applications...I personally also use photoshop...
Probably won't render others 3d content...and even if I did it would be cpu based...
 
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jimmysmitty

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Are you planning to game on both monitors? I haven't seen people game on two but rather three. In that case, why not just get a R9 290 instead? It is faster and comes with more VRAM. 6GB would benefit you but only if you were running 3 monitors.

As for the GPUs, I only see a Sapphire Vapor-X Tri-X and a Tri-X but no Toxic on Newegg. Sapphire and Asus tend to make the best AMD GPUs, MSI is ok.

BTW, DVI-I is able to also do DVI-D the main difference is it also can be adapted to analog for older monitor support. What 1440p monitors are you using that only has DVI inputs?

You also do not need a GPU per monitor. I have 2 1080p monitors and I usually play GW2 on one with a movie playing on the other all on a single HD7970 Vapor-X.
 
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multiple 280x would be better for rendering content...

I NEED dvi-d for 1440p, the monitor won't run on dvi-i.

I need a gpu per monitor as there is only one dvi-d and it doesn't accept dp converted or any...and 1440p needs quite a bit of power...
 
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Okay, that makes a LOT of sense



I'm getting the Korean X-Star...
http://www.ebay.com/itm/Matte-FREE-EXPRESS-X-STAR-DP2710LED-27-2560x1440-Samsung-PLS-Panel-Monitor-/330932578190?pt=Computer_Monitors&hash=item4d0d1e678e
I need color accuracy but I don't need it to be fancy...it's also cool...
It won't do DVI-I...only DVI-D

plus on GPU wouldn't be enough to run one monitor...gaming or not it seems...I am cynical AND skeptical...

Would I notice a diff if I get a toxic (3gb) over the other in gaming?
I'll probably get the 6gb for rendering though...
 
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jimmysmitty

jimmysmitty

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As I said, DVI-D is dual link only meaning digital. DVI-I is single or dual link meaning analog or digital you can plug a DVI-D into it and it will act as a dual link digital signal.

The R9 280X has a DVI-D and a DVI-I. My monitors have VGA, HDMI and DVI-D. One of them is plugged into my HD7970 Vapor-Xs DVI-D and the other is in the DVI-I. My GPU is the same as a 280X, the 280X is just a rebrand of the HD7970.



Never heard of that brand. At least they are using a Samsung panel so that's a good quality aspect.
 
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I wanted a simple, well priced monitor.

it only does digital though...so I need dvi-d...dvi-i doesn't work on this monitor.

But as I asked, Would a 6gb gpu be more beneficial? or just go for the higher clocked asus or toxic gpus (only 3gb)

...please consider what I'll be using it for before throwing and answer...many people have given me issues on another forum and I just flat out rejected them forever...
 
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jimmysmitty

jimmysmitty

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You just are not understanding how it works as DVI-I will work on it.

That aside, the 6GB would only be beneficial, as I said, if you planned to do three monitors and game on all three in Eyefinity. 3GB will be enough as most games use at max at 1440p 2GB, that is if your plan is to game on one while doing something else on the other.
 
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Gee Bee

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As i said you will be fine for your intended use. Spending more on toxic will not make that much difference. You can of course easily oc gpu and vram to bring to toxic specs. My 280x run fine at 1150 in cfx, starts showing problems at 1200mhz.
 
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no, IT WON"T, this monitor lacks the "smarts" to do that, it is single input digital only.

this monitor is pretty much dvi-d port > panel > done...
 
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okay, noted



Ihaveno clue what vrm is...all I know is more pins and phased equal more power delivery and more stable power...

I'll be getting a 1200w or 1300w psu...both are similar...they just flip in price...
 
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okay, I will try to remember this.



Yes, thank you.
I was unsure of the benefits of 6gb for my uses (if there was any)
But you had answered swiftly and a large crazy thread was avoided :)

forever is long time...but I could just never go back to that forum...:D
 
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I'm going to add this here...as I need a bit of clarification-

is it true the R9 280x can't make use of the 6GB vram?

an nvidia fanboy is claiming that neither the GPU or memory bus is capable of utilizing it...

...I call bull but I need to double check...

they are suggesting the 780 because it's faster and it handles it's 3gb better...and the price between the model I chose is only ~$50
He also suggests the 770 2gb because it can't use 4gb and it's cheaper...

Would the 6GB 280x still be better? He is ranting and ranting to no end...
Or should I get the 4GB 770 for $380 rather than the $470 6gb 280x? He claims same performance...but the vram must still amke a difference

pleace clearify...I bet he is using gaming thinking...which would be useless here as the 280x is the same as the 770 in gaming...
 
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jimmysmitty

jimmysmitty

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The guy is just ranting. The GPU can utilize the memory but most normal applications won't take advantage of it and most games will not either. In the future 6GB may be an advantage but for now it is not as most games utilize 2GB maxed out at 1080p.

If you have an application that can utilize that amount of memory, it will benefit to have 6GB and will be used.
 
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okay, thank you.
 
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Gee Bee

Gee Bee

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