7770 CF vs 7870

[deadeye22]

Hi, im thinking of buying either two SAPPHIRE RADEON HD7770 GHZ EDITION OC VAPOR-X or The sapphire 7870 Ghz OC edition.
my cpu is at 4.0Ghz 3570K 8 gigs of 1600 RAM. Which one should i get. Oh btw i got an asus z77 deluxe mobo

 

[bigcyco1]

You should get a 7870 http://www.anandtech.com/bench/Product/536?vs=548& but what is your current power supply make and model

 

[aaab]

In my opinion get the 7870. Crossfire with a low end card isn't recommended.

 

[motorneuron]

I couldn't find after a quick search a review of 7770 CF compared directly to 7870; I could only find the 7950, and performance was pretty comparable. As the anandtech bench makes clear, the 7870 is about 2x as faster, which you can also see by comparing the specs of a 7770 to a 7870: http://www.tomshardware.com/reviews/radeon-hd-7770-7750-benchmark,3135.html vs http://www.tomshardware.com/reviews/radeon-hd-7870-review-benchmark,3148.html. The 7870 basically IS just two 7770 glued together (look at stream processors, texture units, etc.). But then what do you lose by going for the CF configuration? Simple: memory bus width and memory quantity. The two 7770s will behave like they have 1GB of VRAM, plus they will only have a 128-bit memory bus. This will make a bigger difference at higher resolutions and higher AA settings, as well as in more modern games. So go for the 7870.

 

[dudewitbow]

vram and memory bus will be the moving factors along with crossfire/sli inconsistencies will push for the 7870 choice

 

[aaab]

I couldn't find after a quick search a review of 7770 CF compared directly to 7870; I could only find the 7950, and performance was pretty comparable. As the anandtech bench makes clear, the 7870 is about 2x as faster, which you can also see by comparing the specs of a 7770 to a 7870: http://www.tomshardware.com/reviews/radeon-hd-7770-7750-benchmark,3135.html vs http://www.tomshardware.com/reviews/radeon-hd-7870-review-benchmark,3148.html. The 7870 basically IS just two 7770 glued together (look at stream processors, texture units, etc.). But then what do you lose by going for the CF configuration? Simple: memory bus width and memory quantity. The two 7770s will behave like they have 1GB of VRAM, plus they will only have a 128-bit memory bus. This will make a bigger difference at higher resolutions and higher AA settings, as well as in more modern games. So go for the 7870.

Please don't confuse things. A 7870 isn't basically two 7770's glued together... the 7870 is a single GPU card.


You can also get micro stutter from a duel GPU setup, your also more likely to have driver issues.

 

[motorneuron]

Please don't confuse things. A 7870 isn't basically two 7770's glued together... the 7870 is a single GPU card.


You can also get micro stutter from a duel GPU setup, your also more likely to have driver issues.

By "two 7770s glued together" I didn't mean that it's a dual-gpu card like the 690 or upcoming 7990. I just meant its silicon--the GPU--is basically just two copies of the 7770's, which is accurate. If my poetic license made things unclear, I apologize.

 

[deadeye22]

i got a coolermaster pro gold series 600W. So i should get a 7870 huh. Should i save for the 7950 or its not worth the 3-4 month wait to get it. Its more expensive so i might need more time to save up money but still im thinking about that one since 7770 is not an option

 

[deadeye22]

oh and will they fit my HAF X 942 case?

 

[Sunius]

They will fit. You should wait 2 days and get GTX 660 Ti instead. It will be priced under HD 7870 and will perform better than HD 7950.

 

[bigcyco1]

They will fit. You should wait 2 days and get GTX 660 Ti instead. It will be priced under HD 7870 and will perform better than HD 7950.

+1

 

[deadeye22]

dude i cant find it im in greece. None of my shops have it neweg dont have it neither does e bay

 

[Sunius]

You can't find what? GTX 660 Ti isn't released yet. Wait a few days .

 

[deadeye22]

rumors say its better than 7800 series and its going to be priced 299 dollars i hope its not overpriced in euros here in greece

 

[Sunius]

It should be great.

http://www.tweaktown.com/articles/4873/nvidia_geforce_gtx_660_ti_2gb_reference_video_card_overclocked/index.html

 

[deadeye22]

how can it get suchFPS with only a 192 interface. 7950 has 384 memory interface i mean. Are those true?

 

[motorneuron]

Because memory throughput is not such a major limit on overall performance, especially at lower resolutions. (What's interesting is that even the 670 and 680, with their 256-bit buses, are bandwidth-limited at high resolutions and AA settings more than they are limited by the amount of memory.) The 660 Ti seems deliberately targeted at the 1080p consumer. That seems to me like a good choice--the majority of gamers aren't above 1080p yet, not even close, and especially not people whose purchase price maxes out around $300.

 

[deadeye22]

am at 1920 x 1080 so it will surely outperform the 7870 and the 7950? and more important will i enjoy gaming for a good time for the money spent? I dont want EVERYTHING maxed but yeah i want to enjoy my games.

 

[Sunius]

It will be on par with HD 7950. But will be cheaper + you get nvidia bonuses .

 

[sarinaide]

The choice is simple a HD 7870 Ghz Edition card, its new Bios should be available at the end of the month which will see AMD cards employ a turbo boost feature for heavy loads and bumped up clocks. I am not a fan of crossfiring lower tier cards you will run into problems, overall a 7870 GE beats a 580 hadsomely and will likely sit in the GTX 660ti bracket, and be under $300.

 

[deadeye22]

yeah but i has two six pin connectors i just got a 600W coolermaster pro gold. Just able to handle 1 of these. TDP must be higher than 7870 as well as temps

 

[deadeye22]

so wait im still confused whats my best option then......

 

[sarinaide]

7870 Ghz Edition without a doubt.

 

[deadeye22]

so the 660Ti is definetly out of the question? I mean how futureproof is the 7870

 

[Sunius]

No it's not out of the question. I think it's even better option for you than HD 7870 because it's gonna be faster. It will have comparable performance of HD 7950 for price of HD 7870. Check the review above!