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Which one's better b/w a Radeon 6770 GDDR5 and a 6750 DDR3?

Last response: in Graphics & Displays
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May 24, 2012 9:18:43 PM

Hello,
the basic difference between a DDR5 and a DDR3 is the bandwidth getting doubled in the former.. But the 6770 DDR5 has a 76.8 GB/s and the DDR3 has a 73.6 GB/s bandwidth, unless I'm looking at the wrong place..
So, letting you know that it saves me 10 quid getting the 6750, leaving some space to get me a 16 gb pen drive, which should I go for?
And also the clock frequency is 150 more in the 6770, should it be rendered important...?
May 24, 2012 10:00:09 PM

The substantial difference is not the memory, though ddr5 is slightly faster conventionally than ddr3. The real difference is in the core components of the parts. The 6770 has 800 stream processors, 40 TAUs, and 16 ROPs
The 6750 has 720 stream processors, 36 TAUs, and 16 ROPs

In simple terms the 6770 has a substantial advantage over the 6750 in this scenario, as the 6750 has a lower number of stream processors, TAUs, AND ddr3 memory.

Heres theoretical-comparitive power between the two cards, I will try to find some solid benchmarks for you though. http://www.hwcompare.com/5682/radeon-hd-6750-vs-radeon-...
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May 24, 2012 10:09:02 PM

holykalo said:
The substantial difference is not the memory, though ddr5 is slightly faster conventionally than ddr3. The real difference is in the core components of the parts. The 6770 has 800 stream processors, 40 TAUs, and 16 ROPs
The 6750 has 720 stream processors, 36 TAUs, and 16 ROPs

In simple terms the 6770 has a substantial advantage over the 6750 in this scenario, as the 6750 has a lower number of stream processors, TAUs, AND ddr3 memory.

Heres theoretical-comparitive power between the two cards, I will try to find some solid benchmarks for you though. http://www.hwcompare.com/5682/radeon-hd-6750-vs-radeon-...



Gotcha... And how much difference... moreover, what's the importance of the gpu clock speed? And one more thing- I have a laughable dual core processor still, haven't ever thought of replacing it (it's a desktop, so thought buying an i5 laptop would be better, but that's for later), and it's pretty alright for me to play games at 1024 v 768 res... So should I go for a better processor or the dual core will work okay?
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May 24, 2012 11:09:12 PM

RushKP said:
Gotcha... And how much difference... moreover, what's the importance of the gpu clock speed? And one more thing- I have a laughable dual core processor still, haven't ever thought of replacing it (it's a desktop, so thought buying an i5 laptop would be better, but that's for later), and it's pretty alright for me to play games at 1024 v 768 res... So should I go for a better processor or the dual core will work okay?


Paired with a non-demanding card like the 6770 or 6750 your dual core would handle just fine, and in a few cases better than a quad core. So you should be just fine with what you currently have.

Gpu clock speed is the speed in which each individual core in the GPU is clocked. In AMDs case it is the speed in which each stream processor is clocked at. For example, the 6770 has 800 stream processors clocked at 900mhz per core
While the 6750 has 720 stream processors clocked at 725mhz per core

900 x 800 = 720 000
725 x 720 = 522 000

Those numbers just theoretically show the relative power between the two cards. As you can see, the 6770 not only has a higher clock rate, but more cores as well, making it superior in every way to the 6750 )other than power consumption. I cant find any legitimate benchmarks on the 2 cards other than this one which is very hard to find what you are looking for: http://www.google.ca/url?sa=t&rct=j&q=&esrc=s&frm=1&sou...

In my opinion though, the 6770 should yield a hefty 15-25% performance increase over the 6750, and even more so assuming you would purchase the 6750 with ddr3 video Ram.
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May 25, 2012 6:12:21 AM

Best answer selected by RushKP.
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May 25, 2012 6:12:23 AM

Yeah, that's gonna make a substantial difference then, especially as I'm looking forward to GTA V (in low gfx, of course)...
Okay then, thanks for the help... Cheers..
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