• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

470 SLI, PSU and Case

Kribby2006

Kribby2006

Kribby2006

Associate
Joined
5 Jan 2007
Posts
546
Hi Wonderful Forum People,

Wanted to get your opinions on the following:

Been sat on the fence for quite a while now with my GTX 280 and decided just yesterday to get a GTX470 which im really pleased with. Was worried slightly about heat and/or noise etc but have very been pleasantly surprised, anyway...

Never have gone SLI on any of the video card generations that I have had and thought I might just get myself another 470. However, I am currently running a Cosair HX 620 PSU and appreciate I will need something with a bit more power. Would like to get another corsair so im wondering would the HX 750 would manage? I currently have 3 HDD and 1 DVD Rom and the rig as per my spec?

Also, my case has been the same for my last 3-4 rigs and it really couldn't accomadate 2 video cards so anyone have any recommendations for this too, was looking at corsair ones also.

Any advice anyone can add would be very much appreciated.

Thanks.

Kribby.
 
I'd be more comfortable personally with closer to 850-900watt for GTX470 SLI, with less the PSU is gonna be working hard when everythings spun up resulting in more heat and noise.

Unless your playing at over 1920x res, a game that hammers the 470 (not many do) or like 32x AA I wouldn't be in a hurry to add another one in SLI your just eating another 200+ watts of power when a single one can already handle most games maxed out (when clocked to ~800MHz).
 
Rroff said:
I'd be more comfortable personally with closer to 850-900watt for GTX470 SLI, with less the PSU is gonna be working hard when everythings spun up resulting in more heat and noise.

Unless your playing at over 1920x res, a game that hammers the 470 (not many do) or like 32x AA I wouldn't be in a hurry to add another one in SLI your just eating another 200+ watts of power when a single one can already handle most games maxed out (when clocked to ~800MHz).
Click to expand...

Ok cheers Rroff, I guess with regard to the case question I should put that in Case section of the forum, coz my case sux and I really need to change that anyway at some point.
 
Oh one question for you Rroff if you dont mind, I see you have a fairly high overclock on your 470, did try OC'ing mine a bit, but when I changed the memory it failed quite quickly in Kombuster (think thats what its called), in your sig it says 2000, is that 4000 effective? And what did you use OC it?

Thanks.
 
FYI with 4 GTX470's and an o/c i7-920 I never see even 1Kw draw from the Kill-a-watt meter the system is plugged into. And thats with the GPU's and CPU maxed out. GPU's at stock, cpu at 4.2Ghz
 
Biffa said:
FYI with 4 GTX470's and an o/c i7-920 I never see even 1Kw draw from the Kill-a-watt meter the system is plugged into. And thats with the GPU's and CPU maxed out. GPU's at stock, cpu at 4.2Ghz
Click to expand...

Ok thanks for this info,

Rroff said:
Yeah 4000 effective, I use MSI Afterburner to overclock.
Click to expand...

Hmm not sure I will get anyway near that, as I said mine failed fairly quickly, im guessing the voltage adjustment only effects the GPU and not the memory? I hadn't touched this when I tried to OC the memory. Out of interest, which 470 do you have? I got the Asus V2 GTX40

Cheers.
 
Last edited:
Voltage adjustment only affects core. I have an OEM Point of View card.

TBH the memory OC is a little strange - while overclocking on stock voltage I could hit upto 775MHz on the core but the memory would go ape not much over 3600MHz, once I started pushing up the voltage (which I'm pretty sure has no affect on the VRAM) I found it would go upto 4000MHz fine. Only explanation I can think of is that the cards use some kinda divider setup like motherboards where the core frequency and ram are on certain straps and with 800MHz the RAM is on slightly more relaxed timings or something.
 
OP look at my sig and what im running!

The CPU and GPU are both heavily overclocked,i agree that its always nice to have 100-200W over what you need,but in all fairness you dont need that much power unless your are running a SLI/Xfire setup.

600-700W using a decent Quality power supply is usually always enough for a high end system excluding SLI and Xfire.
 
Rroff said:
Voltage adjustment only affects core. I have an OEM Point of View card.

TBH the memory OC is a little strange - while overclocking on stock voltage I could hit upto 775MHz on the core but the memory would go ape not much over 3600MHz, once I started pushing up the voltage (which I'm pretty sure has no affect on the VRAM) I found it would go upto 4000MHz fine. Only explanation I can think of is that the cards use some kinda divider setup like motherboards where the core frequency and ram are on certain straps and with 800MHz the RAM is on slightly more relaxed timings or something.
Click to expand...

Again thanks for your answer and info etc, its as I thought with the core voltage, and maybe you have a point regarding straps etc.

Have been messing round with the card tonight and got to about 825MHz with the voltage slider almost at the top 1075 I think. Memory got to about 1890MHz and then it failed (Kombustor) so im quite happy with that.

Also did a quick run on vantage with 800MHz on Core and a slight adjustment on memory, about 1700MHz and score went from just over 18K to just under 23K.

Overall im really pleased with this new card :D

kmufc77 said:
OP look at my sig and what im running!

The CPU and GPU are both heavily overclocked,i agree that its always nice to have 100-200W over what you need,but in all fairness you dont need that much power unless your are running a SLI/Xfire setup.

600-700W using a decent Quality power supply is usually always enough for a high end system excluding SLI and Xfire.
Click to expand...

Thanks for your answer too, although my original question was regarding adding a second GTX470 so im guessing ill have to get a new PSU, maybe the HX 850 would do it you think?

Thanks again :D
 
Last edited:
Kribby2006 said:
Again thanks for your answer and info etc, its as I thought with the core voltage, and maybe you have a point regarding straps etc.

Have been messing round with the card tonight and got to about 825MHz with the voltage slider almost at the top 1075 I think. Memory got to about 1890MHz and then it failed (Kombustor) so im quite happy with that.

Also did a quick run on vantage with 800MHz on Core and a slight adjustment on memory, about 1700MHz and score went from just over 18K to just under 24K.

Overall im really pleased with this new card :D

yes ive owned that psu most than enough for sli and the best 850w around

Thanks for your answer too, although my original question was regarding adding a second GTX470 so im guessing ill have to get a new PSU, maybe the HX 850 would do it you think?

Thanks again :D
Click to expand...

Yes ive owned the 850 HX more than enough for sli and its the best 850W around,read some reviews.
 
1.087 is usually the top voltage adjustment on these cards unless you unlock it higher - I don't reccomend it unless your using extreme cooling.

I haven't seen any major performance difference in most stuff between stock memory clock and 4000MHz tho.
 
Rroff said:
1.087 is usually the top voltage adjustment on these cards unless you unlock it higher - I don't reccomend it unless your using extreme cooling.

I haven't seen any major performance difference in most stuff between stock memory clock and 4000MHz tho.
Click to expand...

OK, ill stick with 800MHz more than happy with that and wont bother to change what I can potentially set the voltage too.

Thanks.
 
You must log in or register to reply here.
Back
Top Bottom