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View Full Version : 7950GX2 = Why only 500/1200?


OrangeBlast
06-09-06, 03:22 PM
Just curious as to why those chose to go with 500/1200....why not a higher clock?

I mean...

why doesn't EVGA just put 2 of the 7900GT Signature Series cards together and make a SS 7950GX2 at 600/1600 or something! wow...that would be amazing.

also how is the 7950GX2 able to keep up with 7900GTX 512 Sli'd? How does it do it with the lower clocks and all?

jAkUp
06-09-06, 03:25 PM
Nvidia makes the cards. The low clockspeeds are likely to do with increasing the yeilds, thus, lower prices.

kinnane
06-09-06, 03:31 PM
JakUP:
what is the diference in temp between standard clocks and the overclock form you sig?

Blacklash
06-09-06, 03:37 PM
This review has both the standard 7950 GX2 and an overclocked XFX version in it for those interested:

http://www.hothardware.com/viewarticle.aspx

Riptide
06-09-06, 04:43 PM
Heat is part of the problem.

Neophyte
06-09-06, 04:49 PM
Heat is part of the problem. useless in other words.

shungokusatsu
06-09-06, 05:35 PM
Just curious as to why those chose to go with 500/1200....why not a higher clock?

I mean...

why doesn't EVGA just put 2 of the 7900GT Signature Series cards together and make a SS 7950GX2 at 600/1600 or something! wow...that would be amazing.

also how is the 7950GX2 able to keep up with 7900GTX 512 Sli'd? How does it do it with the lower clocks and all?

The 7900 series had tons of issues, and it still does. It was so bad that Nvidia had to make an official statement about it, mainly the high clock speeds of the 7900's were causing tons of artifacting and freezing, sadly I'm still seeing tons of users having problems with them. I can easily vouch for it too, I've RMA'd a total of 6 cards to evga, all had the same exact problems, freezing. After getting some better cooling it seems to work fine. These new speeds are to help keep power and heat consumption down, as well as the price.

Muppet
06-09-06, 08:41 PM
The 7900 series had tons of issues, and it still does. It was so bad that Nvidia had to make an official staement about it, mainly the high clock speeds of the 7900's were causing tons of artifacting and freezing, sadly I'm still seeing tons of users having problems with them. I can easily vouch for it too, I've RMA'd a total of 6 cards to evga, all had the same exact problems, freezing. After gettign some better cooling it seemsed to work fine. These new speeds are to help keep power and heat consumption down, as well as the price.
For once i'm glad i didn't jump on that bandwagon

shungokusatsu
06-09-06, 08:45 PM
For once i'm glad i didn't jump on that bandwagon

Yes, but so far the 7950's are looking good, I've only seen 1 person having issues and it sounds like it's the user not the card.

Muppet
06-09-06, 08:47 PM
Yes, but so far the 7950's are looking good, I've only see n1 person having issues and it sounds like it's the user not the card.
I'm seriously looking at a couple of these puppies though, after reading some reviews :) That is a nice setup you have got there

shungokusatsu
06-09-06, 08:51 PM
I'm seriously looking at a couple of these puppies though, after reading some reviews :) That is a nice setup you have got there

I was weary dropping my 7900 GTX SC SLI setup for these, but now that Nvidia's said were getting the drivers the end summer, I'm more then happy. My cards still haven't arrived from the step-up, I ordered next day air but it takes 1-3 business days for them to test the cards you send in.

Muppet
06-09-06, 08:58 PM
I was weary dropping my 7900 GTX SC SLI setup for these, but now that Nvidia's said were getting the drivers the end summer, I'm more then happy. My cards still haven't arrived from the step-up, I ordered next day air but it takes 1-3 business days for them to test the cards you send in.
Will be looking forward to some benchies and pics when they arrive, especially on your 32x motherboard

shungokusatsu
06-09-06, 09:07 PM
Will be looking forward to some benchies and pics when they arrive, especially on your 32x motherboard

Thanks, I'll definately have some out next week sometime. You don't have to wait, some users who have identical setups to mine already have some scores and pics available.

HeavyH20
06-09-06, 09:14 PM
There are a number of reasons for the lower clocks.

1) Heat. Two cards so slose produce twice as much. Need to control that part.

2) Price. With higher clocked parts, the cost will be more expensive.

3) Power. The more voltage in the core and memory, the more power the cards will need. This is the most restrictive component.

The GX2 spec is identical to the low voltage 7900 GTX Go GPUs (500/600). But since those are 45 W parts, the total power draw would have been only 90 to 100 Watts. Since the draw is 142 Watts, it indicates two lower clocked G71 cores (7900 GT is around 75 Watts).

Monnie Rock
06-09-06, 09:44 PM
Also, do not forget the GPU's used on the 7950GX2 boards are the Mobility Version of the G71.

Thanks,
Monnie

kinnane
06-09-06, 10:25 PM
Monnie: Where did you hear that they are mobility GPUs?

shungokusatsu
06-09-06, 10:30 PM
Monnie: Where did you hear that they are mobility GPUs?
I'm not sure if that's correct. Quad SLI 7900's use the G71M, but the 7950's use the G71.

john19055
06-10-06, 12:20 PM
As some have done said power reasons and heat.

kinnane
06-10-06, 12:43 PM
Maby the chips are ones that didnt make it as GTX`s or overclocked GTs.
Does any one know how much voltage the chips are getting ??

shungokusatsu
06-10-06, 05:37 PM
Maby the chips are ones that didnt make it as GTX`s or overclocked GTs.
Does any one know how much voltage the chips are getting ??

I'm still pretty sure they aren't the G71M gpu's.