I've read some interesting things lately, like "gamers don't buy workstations," and there's really not much difference between a high-end workstation graphics card and a high-end gamer card, except stabile drivers, the ability to render OpenGL, and the price, the price, the price!
Well, I like the stability, longevity, and support of a business computer, so here I am with an Optiplex 755 w/ Wolfedale E8400 Core duo 3.0MHz, 6M L2 cache, 1333 FS bus. It came with 667 MHz memory instead of 800, but seems like 667 DDR should be able to feed the 1333 FSB well enough. I just upgraded to the max 4G RAM w/ 32bit XP Pro. Not too bad a machine, until I investigated putting in a graphics card. I should say that I am not a gamer, but would like to try some games, maybe FlightSim. I plan to do video editing of family videos, and I want quality output and fast processing. I have been known to dabble at being a hardware geek from time to time.
I knew that the PCIE-16 slot was version 1.0, so operates at 1/2 the speed of 2.0. I somehow thought the graphics card would determine the speed, but that was a pipe dream. Someone told me PCIE 2.0 cards would not work at all with a 1.0 interface. (There's also only 1 slot, so no Crossfire or SLI.)
So I started looking at about the fastest PCIE 1.0 gaming cards, the 8800 GTS 320M and 640M. However, I'm worried about 2 basic things - fitting the card in the machine, and not frying the machine. The slot in itself is marked 75 W. All the graphics card reviews I've seen lately start at 130W power consumption at idle and go up to perhaps 250W+ at load. What gives? Can someone please explain to me what the Optiplex 755 PCIE-16 75W restriction means, and how I know which cards satisfy it.
Also, I came to realize after a while and reading some post here that the mobo is effectively upside down in the Optiplex 755 mini-tower. If you look from the front of the computer, almost all the time - all other Dell's and most computers I've seen - the motherboard is on the right. In the Optiplex 755 it's on the left! This means that the graphics card has to go face up in the PCIE slot. That in itself makes more sense, that hot air should rise off of the heat sink, instead of getting trapped under the board (see Zalman heat sink solutions). However, the Dell engineers put the PCIE slot at the top of the expansion slots. That means no double-height cards, which are better cooled. There is also the enormous CPU heat sink/fan shroud and relatively shallow case, which makes it probably impossible to get a 9 or 10 in. card in the machine. Goodbye 8800 GTS (unless it could fit and there are single height ones - prob 320MB - that run cool enough)? Opinions, please!
I did find an excellent bargain in a workstation card - ATI FireGL V7200 - with total memory bandwidth 40GB/s+ and with a removable card extension, so the length of the card would be good. But guess what, it's double height! If only there was a way to hack off the grilled second slot cover, or somehow bend it to fit in the case without voiding the warrantee! Very frustrating!
So it looks like I'm stuck with the 8600 GTS, unless someone can tell me otherwise - please! 512M GDDR3 is important, but total memory bandwidth is key - at 32Gbytes/sec, at least it's half that of the 8800 GTS.
So the next concern is the heat dissipation. When the heat comes off the graphics card, hopefully it will drift away from the CPU and not get drawn by the CPU fan over the CPU heat sink! Or rise to kill my memory cards! What's your opinion on this worry? Should I/can I put a case fan nearly opposite the CPU fan? Talk about cross-purposes! What about an expansion slot fan? Underneath the graphics card, I'm not sure how much good it would do.
I did find the solution to the power supply. It's a PC Power and Cooling 500W special Dell edition, with 2 metal slots that are required to support the PSU from the top of the case. I don't think it's possible to suspend the power supply just from the screws? So that limits your choice of PSU. I had looked at other PSUs, like OCZ / StealthXStream / 600-Watt, but I wonder if that will be suspended correctly. Also, maybe the PSU fan on the bottom of it would be a good thing? - drawing the hot air from on top of the graphics card into the PSU? Maybe a bad thing, but case airflow in general is supposed to be good.
Then again, if I get the 8600 GTS, I may not need a new PSU. I found a post here that says the 305W one I have has 12V rating of 18A. Oh well, 8600 GTS needs 30A. BTW, is XFX a good card? - that looks like what I'm headed for - lifetime warranty! I guess EVGA is an alternative, but I can't find an EVGA 8600 GTS 512MB DDR3 cheap.
I'm eager to hear feedback and suggestions on a graphics card - under $200, please! Thanks.
Replying to my own post, since I just got a great email from the EVGA sales support team. The 75W is the max power supplied through the PCIE-16 bus. The rest of the power must come directly from the PSU - that's why there is a special 6-pin PCIE power connector. So this is not a concern. Thanks, EVGA!
But I'm still confused on the PCIE-16 1.0 vs. 2.0 standard. Can someone definitively answer the question on what happens when you plug a 2.0 graphics card into a 1.0 slot? Will it work at half the speed? Will it work at all?
Member since 2003
Thanks very much for your answer. I'm relieved from at least the compatibility standpoint that I have a lot more and better choices than I thought.
So that leaves fitting in the case and heat dissipation. Regarding heat, maybe I posed a lot of silly worries in my original post. Maybe the Dell engineers were really smart, and the heat coming off the graphics card being drawn through the CPU fan is how they designed it. A strong airflow from the back to the front of the case is what will happen.
I'm just concerned that 70 or even 80 Centigrade hot air being generated from the graphics card will fry something - CPU, memory, or mobo. You do hear a lot of horror stories out there about cards running hot. One possibility I've heard a lot of if the card runs too hot: To break off the cooling mechanism that comes with the card and install a better one.
It would be nice to have a little more clearance under the CPU fan shroud, and a slot opening in the back with no connector above the PCIE-16 slot, just to accommodate double-height cards. Will virtually all single-height cards fit into the Optiplex 755? What cards have you heard of people putting into this machine without frying it?
Regarding PSUs: I will probably go with the PC Power&Cooling 500W Dell model. I don't think there are choices out there with more power that are pre-built to go into Dell's. However, with 35A @ 12V, it has quite a bit of power.
So putting it all together - I want the fastest, coolest-running single-slot graphics card under $200 for my 755. Does ATI tend to run cooler than nVidia? Because of good EVGA technical communications so far, plus lifetime warrantee, I wouldn't mind going with them, and of course they are nVidia.
Video cards cannot be too "thick" towards the right end of the card because the heatsink is in the way. So while any PCIe video card will work, NOT ALL WILL FIT.
It's a matter of finding the right one, but if you ask me, single slot video cards that don't have giant heatsinks should work (and fit)
I think I'm going with the SAPPHIRE TOXIC HD 4850. It looks like it will fit and it has a well-rated cooling solution (Zalman VF900). It's a little more money than I want to spend, but it's near state-of-the-art. I will have to wait until it's in stock and also until Linux drivers come out to use the Cinelerra video-editing software that I want to try, whenever I get around to installing Linux.
at least partly under the CPU fan shroud. If you break the factory cooling solution off to install something like a Zalman, you will likely void the warrantee.
Even though the 305W Dell PSU is likely underrated, I think you gotta get a new one, otherwise you're asking for trouble. The published system requirements for these cards definitely indicate that.
I'm getting too impatient. I'm almost ready to opt for an older-generation solution like the XFX GeForce 8800 GT Video Card - Zalman Edition, or similar BFG OC Thermointelligence. They are a little cheaper, but the performance is quite a bit worse than the 4850. I should wait.
BTW, MSI makes a 4850 card with a massive copper & plastic cooling apparatus. Looks like it will block a lot of airflow in the case though, and might just not quite make it in.
Still worried about possibly frying my system when I finally get the card. I don't think there's any way to put in another fan, and the hot air's going to go right over the CPU heat sink and out the front, probably burning my leg in the process. I'm too much of a pessimist - maybe it will be OK.
Can't answer the question about the audio cable now. Gotta get back to work, and can't detach everything and take the cover off to find out (don't remember).