TechTalkz.com Logo Ask the Experts!

Go Back   TechTalkz.com Technology & Computer Troubleshooting Forums > TechTalkz Member Reviews & Guides > Reviews

XFX 7900 GTX 512MB GDDR3 RoHS Edition

Reviews

 
Comment
Review Tools Display Modes
<!-- google_ad_section_start -->XFX 7900 GTX 512MB GDDR3 RoHS Build<!-- google_ad_section_end -->
XFX 7900 GTX 512MB GDDR3 RoHS Build
Published by TheGamer
28-11-2006
XFX 7900 GTX 512MB GDDR3 RoHS Build

XFX 7900 GTX 512MB GDDR3




The 7900GTX was the flagship model of nVidia before the introduction of 7950GX2 dual core card . This card is based on the G71 core as the rest of the 79'series . The only thing that makes this card different (externally) is its strikingly out-of-usual Heatsink . The HSF features a fan directly on the core via a copperplate and aluminium cooling fins on either side of the fan . The heat is relayed to the cooling fins through a dual "Heat Pipe " design , which is very good and effective (Though I'd been happier if those heat pipes were of copper) . But the card itself is a looker and keeper for sure


Since Pratim had already written a very good review on a 7 series card I won't go into further general details but will restrict to some specific areas .
Specs
:



Transparency Antialiasing
: Objects in the game world typically originate from basic geometric shapes, or primitives, which are antialiased using traditional multisampling algorithms. However, multisampling does not antialias objects that exist inside the geometry, such as an alpha texture.

Transparency antialiasing is configured through the driver by changing the view to advanced settings. After the advanced settings are enabled, the transparency antialiasing setting will appear near the end of the settings list. When checked, transparency antialiasing can be set to off, multisampling, or supersampling. Supersampling transparency antialiasing covers alpha test, alpha blend, and certain pixel shader functions, making it more effective than multisampling.

Now this feature was supposed to be only in 7 series card but it turned out that the nv40 series GPU had this featured too , albeit locked . The 9xx series drivers are able to unlock this feature in any 6xxx card . But the fact remains that a 6800GT sees a huge drop in fps on increasing antialiasing multiplier but the G70 & G71 cores are tailor-made for minimal impact on fps due to antialiasing

Dual DVI Output : The GeForce 7900, GeForce 7800, and GeForce 7600 Series support dual-link DVI, which is powering the next wave of high resolution digital flat panel monitors. As it is obvious , this card supports HDTV using Purevideo decoding .

Power Consumption & Temperatures : The 7900 GTX is a heavy card with a core speed of 650 MHz at stock and 1600 Mhz memory . Though the card can run on a good 400 Watt PSU(SMPS) , it is of paramount importance that the +12Volt railing of that SMPS has a minimum of 22 AMp max. output . At full load this card itself can consume upto 200 Watts of power . Hence this card needs a external 6-pin power connector directly from the SMPS apart from drawing 75 watt from the PCIe slot .
The temperatures are pretty indeed , but from what i gather from the size of the card , you are gonna need more than a local-made cabinet .
IDLE : CPU - 43 C
Motherboard - 35 C
7900 GTX - 41 C
LOAD : CPU - 51 C
Motherboard - 44 C
7900 GTX - 66 C

The threshold temperature of the card is a bit low , only 110 C , so you'd better keep it under 75 C if you want to prevent any artifacts .
BENCHMARKS & FINAL WORDS :

Machine Specs :
*Pentium 4 630 3GHz @ 3.6GHz 2MB L2 EM64T
*MSI 915p/g Combo
*2GB (2x1024) DDR400 Dual Channel (2.5,3,3,8,2T)
*XFX 7900 GTX 512 MB GDDR3 @ 650/1600

3DMark05 : 9436 (Default Settings)
3DMark06 : 5689 (Default Settings , Resolution : 1280x1024)
NFS Carbon : avg 42 fps (1280x1024,4AA,16AF,everything high)
Call Of Duty 2 : avg 50 fps (min 32 fps , max 84fps;1280x1024,8AA,16AF,everything very high)

The 3Dmark scores are very much limited by my current processor which is severely bottlenecking the card . A good dual core like X2 4200+ or a Conroe will do justice to a card like this . Other reviewers have obtained 10000 on '05 at stock frequencies using a X2 4800+ .

Games are smooth enough for me . With a good driver set you can hardly go below 40 fps in any games present today (except maybe Oblivion) . As far as i can say , this card , with a good dual core can give 50+ fps in Crysis .

The only problem is that the first batch of 7900gtx and gts were shipped with some kind of faulty voltage regulator and hence this card can't take any kind of OC . This a huge disappointment since nVidia cards are very popular on the OCing front . However the new revisions are supposed to be okay and can be OCed . But since RMA is a long drawn procedure in India I'd suggest stay away from all "XXX","KO.CO,SO" versions of this card . Get the normal one and enjoy .

This card costs around Rs.30000 , but ofcourse this is a high end card after all . If you have the budget go for it , but if you are planning on a 8800GTX a few months later , or already possess a 79 series card(like 7900GS,7900GT) then buying this one will be useless right now .

All I know is I am very Lucky to have this card running in my machine right now .

Sponsored Links
Published by
TheGamer's Avatar
Senior Member (500+)
Join Date: May 2006
Location: Chandannagar
Age: 30
Posts: 542
Rep Power: 1442
TheGamer has much to be proud ofTheGamer has much to be proud ofTheGamer has much to be proud ofTheGamer has much to be proud ofTheGamer has much to be proud ofTheGamer has much to be proud ofTheGamer has much to be proud ofTheGamer has much to be proud ofTheGamer has much to be proud ofTheGamer has much to be proud of
Send a message via Yahoo to TheGamer

Review Tools

Latest 5 reviews

References
http://www.nvnews.net/reviews/geforce_7900_gtx/page_1.shtml
www.tbreak.com/reviews/article.php?id=440
www.overclockers.co.nz/ocnz/review.php?id=06vga00shootoutnv7600gtnv7900gt0106

  #1  
By deathvirus_me on 28-11-2006, 07:27 AM
Wink

Quote:
RoHS Edition
Noop .. only the newer cards are RoHS compliant .. and its no an "Edition"

Quote:
As far as i can say , this card , with a good dual core can give 50+ fps in Crysis
A very bold statement indeed ..

Anyway nice review
Reply With Quote
  #2  
By TheGamer on 28-11-2006, 07:39 AM
Quote:
Noop .. only the newer cards are RoHS compliant .. and its no an "Edition"
check out the xfx site : http://www.xfxforce.com/web/product/...ationId=614814
and yes sorry about that .. mine is RoHS but its not an "edition"

Quote:
A very bold statement indeed ..
i'm banking on the Crysis engine efficiency
Reply With Quote
  #3  
By Sam RuleZ on 28-11-2006, 07:48 AM
Nice review m8!

And good numberS! ...But is your Prescott @3.6GHz better than a A64 @2.4GHz???

Also what temps do get at full load???
Reply With Quote
  #4  
By Strider on 28-11-2006, 08:21 AM
Great Review. Transistor count 278 millions. Whoo.

Digged & Netscaped.
Reply With Quote
  #5  
By TheGamer on 28-11-2006, 11:36 AM
Quote:
And good numberS! ...But is your Prescott @3.6GHz better than a A64 @2.4GHz???
It depends ....
In synthetic benchmarks like Everest and SiSoft Sandra my prescott scores more whetstones and dhrystones ...... but in games and game benchmarks the AMD has an edge . Though here i need to mention that in 3DMark06 i get the edge because 06 is dual core supportive and my prescott with "HT" is closer to being a dual core .... so i get a CPU score of ~1100 whereas AMD@2.4 does ~900 .....
Overall if you are a gamer then go the AMD way

And yes .. the temps i have updated them in the review . Have a look .
Reply With Quote
  #6  
By X-Caliber on 28-11-2006, 03:21 PM
First of all.. This is an perfect Review... Short but yet covering major point..

Quote:
transistor count 278 millions. Whoo.
I should not do this but just for the information my X1900GT has 384 million Transistors...but this info is of no sense actually...
The card features 36 Pixel Shaders and 8 vertex Shaders yet has been massively castrated to twelve pixel pipelines.



Well 7900 GTX well does score in Memory Bandwidth ....But X1900 GT compare with 7900GT in regards on price and performance then I do have upper hand

And atleast your Card is not getting insulted....My X1900GT must be literally pissed off too know that its being run on 2.66 GHz @ 533, 768mb @ 266 , 40 Gb @ 5400 and top of it... 300 Watt 18 amp onn 12v

But sticking to the topic this was an indeed good move...and thanx to death you go it...

Enjoy you games dude..
Reply With Quote
  #7  
By deathvirus_me on 28-11-2006, 06:13 PM
Quote:
The card features 36 Pixel Shaders and 8 vertex Shaders yet has been massively castrated to twelve pixel pipelines.
Not exactly ... just 12 pixel pipelines , and 8 vertex pipelines ... where each pixel pipeline can do 3 operations in one cycle .. though it'll work like a 36 pp card , it'll actually be bottleneck if the card has a low core speed , and low mem. bandwidth ...

Now , hardly any game actually utilize all the pipe's on the 7800GT , the X1900GT being far off ... so its again down to only how fast the card actually is .. the really good thing about the 7900GT is the amount of OC it can sustain ... infact some people do hit 600/1800 even without volt mods , and with the stock cooler ..
Reply With Quote
  #8  
By X-Caliber on 28-11-2006, 07:13 PM
Quote:
so its again down to only how fast the card actually is
Cent percent true and this is the sole reason for which some games give one or more fps greater than X1900GT.....BUt when benched agian popular benchmark software we see X1900GT sails ahead....also not to forget HDR + AA where it smashes a punch.....

Quote:
infact some people do hit 600/1800 even without volt mods , and with the stock cooler ..
Yes i too had seen many....But I have also seen guys who are running X1900GT @ 620 core (stock is 575) without any Volt mod....And this issue literally depends from PC to PC....I mean there are many factor involved while overclocking...and not all have same Components..

Quote:
Quote:
The card features 36 Pixel Shaders and 8 vertex Shaders yet has been massively castrated to twelve pixel pipelines.
Not exactly ... just 12 pixel pipelines , and 8 vertex pipelines ...
Firstly i did specify it has 8 vertex shader and 12 pixel pipelines...and i agree this 12 ppl work is multiply of 3 to give 36 ppl...
But i did mentioned it bcoz of my craze...ofcourse 36 is much bigger no..when compared to 12...and to add...u may check major review sites..they to say 36 ppl.....

Quote:
it'll actually be bottleneck if the card has a low core speed , and low mem. bandwidth ...
This factor also depends on the CPU's core speed and clock speed of physical memory....
As well i dont feel 38.4 GB/s is that low..with stock core at 575..with pixel fill rate of 6.9 Gp/s
and though X1900 GT has less peak fill rate when compared to 7900GT, but it makes up the deficit in other ways, especially by having lots of computational power in those 36 pixel shader units. This really counts as games use more advanced shading techniques, computational throughput tends to matter more than fill rate, so this is no small thing but infact matter alots....so still i wonder Why Nvidia still stick to less Pixel Shader....Though they have rectified this in G80...which again makes me a fan of Nvidia
Reply With Quote
  #9  
By TheGamer on 29-11-2006, 04:55 AM
well actually , the games that have released upto now didn't even use 16pp properly so having "effective" 36pp were kinda useless . It does help in performance for sure but they were not needed at this moment . I guess thats why nVidia introduced 48pp only when games like Crysis was on the horizon ....

And one more thing I'd like to mention here, that if you reflect over the fact, that a card has 36pp but only 8vp and suppose a game needs 10vp and 10pp,
the game will not run as it is meant , because the design itself is a bottleneck here . So you see larger shader numbers are only effective if they are Unified ..... And thats what gonna happen in nex gen cards ....

Both ATI and nVidia realised this . For example the 1900xtx has 48 "effective" PP and the 7900GT/GTX etc has 24 PP .. but still both these cards perform similar (maybe 1-2% difference) . Why?? Shouldn't you say that a 48PP card give a lot better fps ?? Its only because the games never utilise 24PP let alone 48PP .....
Now with DX10 and Unified shaders this stalemate is gonna break ...
Reply With Quote
Comment

Review Tools
Display Modes


Similar Threads
Review Review Starter Category Comments Last Post
Microsoft Student Edition vs Standard Edition Nana Microsoft Office 1 29-08-2007 12:19 AM
Re: 512MB RAM Josh Windows Vista All 0 17-08-2007 10:45 AM
Review: XFX GeForce 7950GT 550M 512 MB GDDR3 deathvirus_me Reviews 14 20-12-2006 05:44 PM
Dell leaks 7900 GS specs Dark Star General Hardware 0 20-08-2006 03:26 PM
What is RoHS? ImamRazi Technical Discussions 0 13-03-2006 04:38 AM


< Home - Windows Help - MS Office Help - Hardware Support >


New To Site? Need Help?

All times are GMT. The time now is 07:58 PM.


vBulletin, Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © 2005-2016, TechTalkz.com. All Rights Reserved - Privacy Policy
Valid XHTML 1.0 Transitional