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I'm deciding what gpu to buy at the moment, using Intel HD for now. Was waiting for the 290x, then Nvidia announcned a new card. *sigh*  more waiting >.>

A lot of waiting, kinda sucks being without a card for so long. But anyway... i'm not sure about the vram and how it works exactly.

 

For example, if i buy a 770 with 4gb memory (256bit, 7ghz mem clock) vs a 780 with 3gb memory (384bit, 6ghz mem clock).

Is the 770 able to use ALL the memory because it has a higher memory clock (similar to the new 780ti)?

I keep finding different opinions on this, but i would like to know from someone who actually knows for sure.

 

Because the new 780ti is going to use only 3gb with the memory clock at 7ghz, like the 4gb models of the 770.

 

I'm really deciding between a 770 4gb sli vs a single 780ti or perhaps sli 780. But then i will only have 3gb vram total.

 

(just a heads up, i know sli doesn't double the memory)

 

Any advice would be great!

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I'm deciding what gpu to buy at the moment, using Intel HD for now. Was waiting for the 290x, then Nvidia announcned a new card. *sigh*  more waiting >.>

A lot of waiting, kinda sucks being without a card for so long. But anyway... i'm not sure about the vram and how it works exactly.

 

For example, if i buy a 770 with 4gb memory (256bit, 7ghz mem clock) vs a 780 with 3gb memory (384bit, 6ghz mem clock).

Is the 770 able to use ALL the memory because it has a higher memory clock (similar to the new 780ti)?

I keep finding different opinions on this, but i would like to know from someone who actually knows for sure.

 

Because the new 780ti is going to use only 3gb with the memory clock at 7ghz, like the 4gb models of the 770.

 

I'm really deciding between a 770 4gb sli vs a single 780ti or perhaps sli 780. But then i will only have 3gb vram total.

 

(just a heads up, i know sli doesn't double the memory)

 

Any advice would be great!

 

The memory bus on the 770 is to weak to use all of the 4 GB in many cases so I would personally go for 780 (for performance) or 780ti (for epicness and "swag") :)

 

3 GB is anyway plenty for all games today so don´t worry too much about that ;) If you think you will use more then go with a 290x with 6 GB ^^

Tor
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The 770 can't use all of its memory even if it was at a outragesly high clock speed because it has a 256 bit bus that can't handle 4 GB of VRAM. The 780 can as it has the wider bus. We currently know nothing about the 780ti. Although we do know that the 780ti will have at least a 384 but bus, so comparing a 770 to a 780ti is pointless.

 

A good way to think about memory buses is like a pipe. a wider pipe (384 bit bus) will move water faster than a thinner pipe (256 bit bus) with really high water flow. 

 

Edit: But if your going for high resolution gaming go for a R9 290x in Crossfire.

Back from the dead....

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I won't be going AMD anytime soon. Had too much trouble with stutter. And i am not convinced they completely solved it now either. 

 

So what they say is true about a 770 SLI with 4gb (not single 770), they can't utilize the complete 4gb? hmmz... Strange they sell the that way >.>

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The 770 can't use all of its memory even if it was at a outragesly high clock speed because it has a 256 bit bus that can't handle 4 GB of VRAM. The 780 can as it has the wider bus. We currently know nothing about the 780ti. Although we do know that the 780ti will have at least a 384 but bus, so comparing a 770 to a 780ti is pointless.

 

A good way to think about memory buses is like a pipe. a wider pipe (384 bit bus) will move water faster than a thinner pipe (256 bit bus) with really high water flow. 

 

Edit: But if your going for high resolution gaming go for a R9 290x in Crossfire.

 

Well the info on "that paticular site" has not been wrong much lately. I'll wait untill next week regardless.

 

But the bus on the 290x might be a lot bigger but it has a much lower mem clock (5ghz) making the difference between the 290x and 780 (6ghz) minimal as seen in benchmarks. So i was thinking the 4gb 770 compensated the same way, guess not then :(

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Well the info on "that paticular site" has not been wrong much lately. I'll wait untill next week regardless.

 

But the bus on the 290x might be a lot bigger but it has a much lower mem clock making the difference between the 290x and 780 minimal as seen in benchmark. So i was thinking the 4gb 770 compensated the same way, guess not then :(

4k gaming better utilizes the higher bit bus, so with a slight memory OC the 290x will start to pull ahead as the clock speeds increase.

Back from the dead....

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If you are going to get a 290X either watercool it or wait until aftermarket coolers come out.

 

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