Gadgetory

are you ready to rumble welcome back once again to TECA tomorrow I'm Eric your host and today we're going to bring you something very interesting unless you guys have been living in Iraq you know that AMD has released a brand new GPU out into the market now why is this well when AMD looked at their lineup between their 7770 and their 7850 they felt that there was a gap in between there that could be filled and therefore the new HD 77 90 was born not today we're going to bring you the review comparison against its little brother card the 77 70 which many of you have asked for so what that said let's get ready to rumble and jump in to the ring so now let's talk about some of the basic differences between the new 77 90 and its little brother the seventy seven seventy now the 77 78 GPU was called cape verde and it actually featured a die that was slightly smaller than the new 77 90 the 77 90 is based off the new bone air GPU and actually this is the very first of the sea islands to actually hit the market there'll be many more that are coming out but this is the first now stream processors which is really the most important thing about the card is a major difference between the two on the 77 90 we see 896 stream processors on the 77 70 we see only 640 there are also some difference in the total available memory bandwidth now take into consideration that both these cards are overclocked on the 77 90 we see a total available memory bandwidth of 100 and 2.4 gigabytes per second on the 77 70 we see slightly lower at 80 3.2 gigabytes per second so there is a pretty big difference there now let's talk about the GPU core clock speed one thing to take note of the 7770 is actually clocked higher it's at eleven hundred megahertz on the 77 90 the core clock is at a thousand 75 but the memory speeds in the 77 90 are actually faster we see the memory speeds at 1600 megahertz and on the 77 70 we see them back to 1300 megahertz so there are some differences there as well both cards feature one gigabyte of gddr5 memory both cards feature 100 memory interface all those things are pretty much the same so now let's take a look at the aesthetics of the card we can see that right off the bat both of these cards feature aftermarket cooling the real difference is one has vapor X which is a 77 70 and the 77 90 has dual X you also want to take note that both of these cards are sapphire based cards other cards from other manufacturers will differ in how their size what the shroud is and everything else on the card and for those various models and pricing make sure you guys check out the link right below the like button both the cards that were looking at today feature the same 7-inch PCB although the 7770 has a blue PCB and the 77 90 has a black home which you know may matter to some people but I don't think it's too much of a concern now let's take a look at the rear i/o on the i/o of the 7770 you can see that the card features two dual link DVI connections a single HDMI and a single standard DisplayPort on the 77 90 however things get a little bit different there's a black port and a white port the black port is a single link DVI port and the white one is the dual link you also see once again the standard HDMI and standard DisplayPort technology now that we've seen the features differences between the 77 70 and the 77 90 and we've got that clear in our head let's now jump in and see some performance comparisons now we know that our red dot extreme system isn't you know the absolute highest in gaming system it was meant more for workstations slats gaming but we're kind of waiting for Haswell to come out when has what comes out will be changing it up and changing out our test system right now we're using the SRX motherboard we're using 226 60 Zeon's we've got two HyperX drives from Kingston that are in raid 0 80 gigabytes of Patriot memory just all kinds of cool stuff including an OCC PCI 256 gigabyte ya boot drive that's right so this thing really does Rock in a lot of circumstances so with that said let's jump in and let's see the test okay so there you have it we've seen the differences in features we've seen the differences in performance and we can see that as far as the sheer performance goes the 77 90 does blow away the 77 70 although there is a slight kick back to that the card is actually running quite a bit hotter as well pretty much this new card is running hmm hot hot hot hot hot now with drivers and stuff and as they do the fan timing and they custom do that maybe it'll actually get better some companies spend a lot of time doing custom fan tuning I think with these release they were just trying to pretty much get the card to market but as the drivers improve and that fan tuning gets better we'll probably actually see some better cooling on the car so if you guys also want to see the full written review on the new Radeon HD 77 90 meets you guys check that out over on our website www.marykay.co.uk/awilliam visit