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GPU help needed

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September 10, 2012 3:13:14 PM

I'm debating which GPU to purchase for high end gaming and am currently looking @ the 7770's, 7850's, and 7870's. When I use a tool such as PCPartPicker, however, I yield the following results: http://img689.imageshack.us/img689/4911/radeongpus.png

As you can see, "lower" quality cards are clocking higher than their more expensive and "higher" quality counterparts.

Also, I am clueless when it comes to brands for GPU's.

The GPU is the last part of my system build I need to decide on, so any help with picking out the right one (or a few great ones with varying prices for me to select from) would be massively appreciated.

Please don't post the standard "drop heirarchy here, ask for uprate" post, I've seen it, I learn nothing from it, I can count and would have drawn more or less the same conclusions if it were that simple.

More about : gpu needed

September 10, 2012 3:46:24 PM

you need to give us more information for us to pick out a new gpu for you....tell us what cpu, motherboard and power supply you have at the least...also what is your budget? is this a pre-built system or are you putting it together yourself?
a b 4 Gaming
September 10, 2012 3:58:08 PM

amds way of making gpu atm is 2 gpus per family. So the clock inside the cape verde 7770 does not equal the clock inside inside the picairn 7870 and 7850's.

amd looks more like
Tahiti: gpu model,(7970), cut model(7950), Pitcairn gpu model(7870), cut model (7850), Cape Verde gpu model(7770), Cut model (7750)

rather than nvidias current look on lines which is slightly more plausable to go by clocks which is:

GK 104 Gpu model (680), Cut Model(670), Cut Model(660ti), then now they starting to get into other GK's being a slightly new card for 660 normal and lower


clocks can only be compared to the same family of cards(i.e 7870 and 7850) and cannot be compared to other families.
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September 10, 2012 5:57:20 PM

http://img515.imageshack.us/img515/1796/compfinalminusg... is the current build so far, without the GPU ofc. Depending on how well the card and the rest of the build complement one another I suppose my budget on a GPU could be as high as 255$, but obviously we're looking for the best bang for the buck and not just looking for the straight fastest clocked GPU. I'm looking for performance, speed, and life-time - nothing that's going to burn up too fast. I listed AMD GPU's here as my research thus far has suggested they are they superior models, but should I be misinformed, feel free to note so, with your GPU suggestions.
September 10, 2012 6:58:25 PM

Clockspeeds are only comparable on the same chip.
Higher clocks on the same chip = higher performance.
Higher clocks on different chips can go both ways.
It all depends on how many operations can be performed per cycle for that particular chip. If a chip can perform 10 operations per cycle and runs 10 cycles per second (100 ops./sec.) it is better than a chip that can run 9 operations per cycle and 11 cycles per second (99 ops./sec.).
This is why hierarchies are the best ways to sort out which is the best performance.
It's like looking at cars and comparing engines. One car's engine is rated at 300 horse-power and another cars engine is rated at 600 goat-power. Going for the higher number doesn't mean higher power...

As an example... the HD 7770 Ghz edition runs at 1 Ghz and has 1.28 Tflops...
compare that to the HD 7970 Ghz edition that runs at 1 Ghz but has 4.3 Tflops!
September 10, 2012 7:11:56 PM

I was looking @ the Asus Radeon HD 7870 2GB.
How does it compare to the SAPPHIRE Radeon HD 7870 GHz Edition 2GB that was linked by Drums101? The prices is the same.

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September 10, 2012 8:09:18 PM
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In all honesty... The Sapphire is 5-8% faster, in other words you won't see any noticeable difference in performance between the two... Look at the cooler design and see which offes better cooling. In the end, I'd go with the one that has the better warranty/customer service.
The Sapphire is the Ghz edititon... meaning it is factory overclocked to around 1 ghz... athough it can be taken to 1.2 Ghz fairly easily
http://www.xbitlabs.com/articles/graphics/display/sapph...
but... Asus has better brand recognition/customer service.
September 12, 2012 1:00:55 PM

My only concern with pre-clocked gpu's and I suppose overclocking in general is the % performance increase vs the heat increase and subsequent lifetime decrease. How off setting is OC & will my rig need liquid cooling/additional fans?
September 12, 2012 4:27:16 PM

getting a pre overclocked card vs. stock card will not mean that you need to get water cooling in your rig....it may mean you need more case fans depending on your cooling setup now...if you have half way decent cooling in your case right now you should be fine.
September 12, 2012 4:51:46 PM

The case is other part of the rig I have yet to select. I was suggested the Coolmaster HAF912 ATX, but others have suggested otherwise, that while the HAF912 is a decent budget case, it will be too loud when supporting this set-up and so I was suggested the following 3:
Performance One P280 ATXmd
Antec P280
NZXT Technologies H2 Classic Silent Midtower Chassis CS-NT-H2-W (White)
I am still uncertain which to purchase, and how many extra fans will be necessary.
September 19, 2012 12:42:41 PM

Best answer selected by Awlips.
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